]> git.saurik.com Git - wxWidgets.git/blobdiff - src/generic/treectlg.cpp
Ensure there is valid context for DrawRectangle
[wxWidgets.git] / src / generic / treectlg.cpp
index e82b05d4e6855a616247384110136ae6c6d91579..d7193a9febe4380661f50f6e188580b8a453bb14 100644 (file)
@@ -1,5 +1,5 @@
 /////////////////////////////////////////////////////////////////////////////
-// Name:        treectlg.cpp
+// Name:        src/generic/treectlg.cpp
 // Purpose:     generic tree control implementation
 // Author:      Robert Roebling
 // Created:     01/02/97
 // headers
 // -----------------------------------------------------------------------------
 
-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
-  #pragma implementation "treectlg.h"
-#endif
-
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
 
 #if wxUSE_TREECTRL
 
-#include "wx/treebase.h"
+#include "wx/treectrl.h"
+
+#ifndef WX_PRECOMP
+    #include "wx/dcclient.h"
+    #include "wx/timer.h"
+    #include "wx/settings.h"
+    #include "wx/listbox.h"
+    #include "wx/textctrl.h"
+#endif
+
 #include "wx/generic/treectlg.h"
-#include "wx/timer.h"
-#include "wx/textctrl.h"
 #include "wx/imaglist.h"
-#include "wx/settings.h"
-#include "wx/dcclient.h"
 
 #include "wx/renderer.h"
 
+#ifdef __WXMAC__
+    #include "wx/osx/private.h"
+#endif
+
 // -----------------------------------------------------------------------------
 // array types
 // -----------------------------------------------------------------------------
 
-class WXDLLEXPORT wxGenericTreeItem;
+class WXDLLIMPEXP_FWD_CORE wxGenericTreeItem;
 
-WX_DEFINE_EXPORTED_ARRAY_NO_PTR(wxGenericTreeItem *, wxArrayGenericTreeItems);
+WX_DEFINE_ARRAY_PTR(wxGenericTreeItem *, wxArrayGenericTreeItems);
 
 // ----------------------------------------------------------------------------
 // constants
@@ -56,6 +61,12 @@ static const int NO_IMAGE = -1;
 
 static const int PIXELS_PER_UNIT = 10;
 
+// the margin between the item state image and the item normal image
+static const int MARGIN_BETWEEN_STATE_AND_IMAGE = 2;
+
+// the margin between the item image and the item text
+static const int MARGIN_BETWEEN_IMAGE_AND_TEXT = 4;
+
 // -----------------------------------------------------------------------------
 // private classes
 // -----------------------------------------------------------------------------
@@ -75,7 +86,7 @@ public:
 private:
     wxGenericTreeCtrl *m_owner;
 
-    DECLARE_NO_COPY_CLASS(wxTreeRenameTimer)
+    wxDECLARE_NO_COPY_CLASS(wxTreeRenameTimer);
 };
 
 // control used for in-place edit
@@ -84,22 +95,26 @@ class WXDLLEXPORT wxTreeTextCtrl: public wxTextCtrl
 public:
     wxTreeTextCtrl(wxGenericTreeCtrl *owner, wxGenericTreeItem *item);
 
+    void EndEdit( bool discardChanges );
+
+    const wxGenericTreeItem* item() const { return m_itemEdited; }
+
 protected:
     void OnChar( wxKeyEvent &event );
     void OnKeyUp( wxKeyEvent &event );
     void OnKillFocus( wxFocusEvent &event );
 
     bool AcceptChanges();
-    void Finish();
+    void Finish( bool setfocus );
 
 private:
     wxGenericTreeCtrl  *m_owner;
     wxGenericTreeItem  *m_itemEdited;
     wxString            m_startValue;
-    bool                m_finished;
+    bool                m_aboutToFinish;
 
     DECLARE_EVENT_TABLE()
-    DECLARE_NO_COPY_CLASS(wxTreeTextCtrl)
+    wxDECLARE_NO_COPY_CLASS(wxTreeTextCtrl);
 };
 
 // timer used to clear wxGenericTreeCtrl::m_findPrefix if no key was pressed
@@ -112,12 +127,12 @@ public:
 
     wxTreeFindTimer( wxGenericTreeCtrl *owner ) { m_owner = owner; }
 
-    virtual void Notify() { m_owner->m_findPrefix.clear(); }
+    virtual void Notify() { m_owner->ResetFindState(); }
 
 private:
     wxGenericTreeCtrl *m_owner;
 
-    DECLARE_NO_COPY_CLASS(wxTreeFindTimer)
+    wxDECLARE_NO_COPY_CLASS(wxTreeFindTimer);
 };
 
 // a tree item
@@ -125,7 +140,13 @@ class WXDLLEXPORT wxGenericTreeItem
 {
 public:
     // ctors & dtor
-    wxGenericTreeItem() { m_data = NULL; }
+    wxGenericTreeItem()
+    {
+        m_data = NULL;
+        m_widthText =
+        m_heightText = -1;
+    }
+
     wxGenericTreeItem( wxGenericTreeItem *parent,
                        const wxString& text,
                        int image,
@@ -141,18 +162,36 @@ public:
     int GetImage(wxTreeItemIcon which = wxTreeItemIcon_Normal) const
         { return m_images[which]; }
     wxTreeItemData *GetData() const { return m_data; }
+    int GetState() const { return m_state; }
 
     // returns the current image for the item (depending on its
     // selected/expanded/whatever state)
     int GetCurrentImage() const;
 
-    void SetText( const wxString &text );
-    void SetImage(int image, wxTreeItemIcon which) { m_images[which] = image; }
+    void SetText(const wxString& text)
+    {
+        m_text = text;
+
+        ResetTextSize();
+    }
+
+    void SetImage(int image, wxTreeItemIcon which)
+    {
+        m_images[which] = image;
+        m_width = 0;
+    }
+
     void SetData(wxTreeItemData *data) { m_data = data; }
+    void SetState(int state) { m_state = state; m_width = 0; }
 
-    void SetHasPlus(bool has = TRUE) { m_hasPlus = has; }
+    void SetHasPlus(bool has = true) { m_hasPlus = has; }
+
+    void SetBold(bool bold)
+    {
+        m_isBold = bold;
 
-    void SetBold(bool bold) { m_isBold = bold; }
+        ResetTextSize();
+    }
 
     int GetX() const { return m_x; }
     int GetY() const { return m_y; }
@@ -160,39 +199,80 @@ public:
     void SetX(int x) { m_x = x; }
     void SetY(int y) { m_y = y; }
 
-    int  GetHeight() const { return m_height; }
-    int  GetWidth()  const { return m_width; }
+    int GetHeight() const { return m_height; }
+    int GetWidth() const { return m_width; }
+
+    int GetTextHeight() const
+    {
+        wxASSERT_MSG( m_heightText != -1, "must call CalculateSize() first" );
+
+        return m_heightText;
+    }
+
+    int GetTextWidth() const
+    {
+        wxASSERT_MSG( m_widthText != -1, "must call CalculateSize() first" );
 
-    void SetHeight(int h) { m_height = h; }
-    void SetWidth(int w) { m_width = w; }
+        return m_widthText;
+    }
 
     wxGenericTreeItem *GetParent() const { return m_parent; }
 
+    // sets the items font for the specified DC if it uses any special font or
+    // simply returns false otherwise
+    bool SetFont(wxGenericTreeCtrl *control, wxDC& dc) const
+    {
+        wxFont font;
+
+        wxTreeItemAttr * const attr = GetAttributes();
+        if ( attr && attr->HasFont() )
+            font = attr->GetFont();
+        else if ( IsBold() )
+            font = control->m_boldFont;
+        else
+            return false;
+
+        dc.SetFont(font);
+        return true;
+    }
+
     // operations
-        // deletes all children notifying the treectrl about it if !NULL
-        // pointer given
-    void DeleteChildren(wxGenericTreeCtrl *tree = NULL);
+
+    // deletes all children notifying the treectrl about it
+    void DeleteChildren(wxGenericTreeCtrl *tree);
 
     // get count of all children (and grand children if 'recursively')
-    size_t GetChildrenCount(bool recursively = TRUE) const;
+    size_t GetChildrenCount(bool recursively = true) const;
 
     void Insert(wxGenericTreeItem *child, size_t index)
-    { m_children.Insert(child, index); }
+        { m_children.Insert(child, index); }
+
+    // calculate and cache the item size using either the provided DC (which is
+    // supposed to have wxGenericTreeCtrl::m_normalFont selected into it!) or a
+    // wxClientDC on the control window
+    void CalculateSize(wxGenericTreeCtrl *control, wxDC& dc)
+        { DoCalculateSize(control, dc, true /* dc uses normal font */); }
+    void CalculateSize(wxGenericTreeCtrl *control);
 
     void GetSize( int &x, int &y, const wxGenericTreeCtrl* );
 
+    void ResetSize() { m_width = 0; }
+    void ResetTextSize() { m_width = 0; m_widthText = -1; }
+    void RecursiveResetSize();
+    void RecursiveResetTextSize();
+
         // return the item at given position (or NULL if no item), onButton is
-        // TRUE if the point belongs to the item's button, otherwise it lies
-        // on the button's label
+        // true if the point belongs to the item's button, otherwise it lies
+        // on the item's label
     wxGenericTreeItem *HitTest( const wxPoint& point,
                                 const wxGenericTreeCtrl *,
                                 int &flags,
                                 int level );
 
-    void Expand() { m_isCollapsed = FALSE; }
-    void Collapse() { m_isCollapsed = TRUE; }
+    void Expand() { m_isCollapsed = false; }
+    void Collapse() { m_isCollapsed = true; }
 
-    void SetHilight( bool set = TRUE ) { m_hasHilight = set; }
+    void SetHilight( bool set = true ) { m_hasHilight = set; }
 
     // status inquiries
     bool HasChildren() const { return !m_children.IsEmpty(); }
@@ -210,7 +290,7 @@ public:
         if ( !m_attr )
         {
             m_attr = new wxTreeItemAttr;
-            m_ownsAttr = TRUE;
+            m_ownsAttr = true;
         }
         return *m_attr;
     }
@@ -219,23 +299,40 @@ public:
     {
         if ( m_ownsAttr ) delete m_attr;
         m_attr = attr;
-        m_ownsAttr = FALSE;
+        m_ownsAttr = false;
+        m_width = 0;
+        m_widthText = -1;
     }
         // set them and delete when done
     void AssignAttributes(wxTreeItemAttr *attr)
     {
         SetAttributes(attr);
-        m_ownsAttr = TRUE;
+        m_ownsAttr = true;
+        m_width = 0;
+        m_widthText = -1;
     }
 
 private:
+    // calculate the size of this item, i.e. set m_width, m_height and
+    // m_widthText and m_heightText properly
+    //
+    // if dcUsesNormalFont is true, the current dc font must be the normal tree
+    // control font
+    void DoCalculateSize(wxGenericTreeCtrl *control,
+                         wxDC& dc,
+                         bool dcUsesNormalFont);
+
     // since there can be very many of these, we save size by chosing
     // the smallest representation for the elements and by ordering
     // the members to avoid padding.
     wxString            m_text;         // label to be rendered for item
+    int                 m_widthText;
+    int                 m_heightText;
 
     wxTreeItemData     *m_data;         // user-provided data
 
+    int                 m_state;        // item state
+
     wxArrayGenericTreeItems m_children; // list of children
     wxGenericTreeItem  *m_parent;       // parent of this item
 
@@ -243,22 +340,22 @@ private:
 
     // tree ctrl images for the normal, selected, expanded and
     // expanded+selected states
-    short               m_images[wxTreeItemIcon_Max];
+    int                 m_images[wxTreeItemIcon_Max];
 
     wxCoord             m_x;            // (virtual) offset from top
     wxCoord             m_y;            // (virtual) offset from left
-    short               m_width;        // width of this item
-    unsigned char       m_height;       // height of this item
+    int                 m_width;        // width of this item
+    int                 m_height;       // height of this item
 
     // use bitfields to save size
-    int                 m_isCollapsed :1;
-    int                 m_hasHilight  :1; // same as focused
-    int                 m_hasPlus     :1; // used for item which doesn't have
+    unsigned int        m_isCollapsed :1;
+    unsigned int        m_hasHilight  :1; // same as focused
+    unsigned int        m_hasPlus     :1; // used for item which doesn't have
                                           // children but has a [+] button
-    int                 m_isBold      :1; // render the label in bold font
-    int                 m_ownsAttr    :1; // delete attribute when done
+    unsigned int        m_isBold      :1; // render the label in bold font
+    unsigned int        m_ownsAttr    :1; // delete attribute when done
 
-    DECLARE_NO_COPY_CLASS(wxGenericTreeItem)
+    wxDECLARE_NO_COPY_CLASS(wxGenericTreeItem);
 };
 
 // =============================================================================
@@ -284,20 +381,21 @@ static void EventFlagsToSelType(long style,
 }
 
 // check if the given item is under another one
-static bool IsDescendantOf(wxGenericTreeItem *parent, wxGenericTreeItem *item)
+static bool
+IsDescendantOf(const wxGenericTreeItem *parent, const wxGenericTreeItem *item)
 {
     while ( item )
     {
         if ( item == parent )
         {
             // item is a descendant of parent
-            return TRUE;
+            return true;
         }
 
         item = item->GetParent();
     }
 
-    return FALSE;
+    return false;
 }
 
 // -----------------------------------------------------------------------------
@@ -325,41 +423,58 @@ BEGIN_EVENT_TABLE(wxTreeTextCtrl,wxTextCtrl)
 END_EVENT_TABLE()
 
 wxTreeTextCtrl::wxTreeTextCtrl(wxGenericTreeCtrl *owner,
-                               wxGenericTreeItem *item)
-              : m_itemEdited(item), m_startValue(item->GetText())
+                               wxGenericTreeItem *itm)
+              : m_itemEdited(itm), m_startValue(itm->GetText())
 {
     m_owner = owner;
-    m_finished = FALSE;
+    m_aboutToFinish = false;
+
+    wxRect rect;
+    m_owner->GetBoundingRect(m_itemEdited, rect, true);
+
+    // corrects position and size for better appearance
+#ifdef __WXMSW__
+    rect.x -= 5;
+    rect.width += 10;
+#elif defined(__WXGTK__)
+    rect.x -= 5;
+    rect.y -= 2;
+    rect.width  += 8;
+    rect.height += 4;
+#elif defined(wxOSX_USE_CARBON) && wxOSX_USE_CARBON
+    int bestHeight = GetBestSize().y - 8;
+    if ( rect.height > bestHeight )
+    {
+        int diff = rect.height - bestHeight;
+        rect.height -= diff;
+        rect.y += diff / 2;
+    }
+#endif // platforms
 
-    int w = m_itemEdited->GetWidth(),
-        h = m_itemEdited->GetHeight();
+    (void)Create(m_owner, wxID_ANY, m_startValue,
+                 rect.GetPosition(), rect.GetSize());
 
-    int x, y;
-    m_owner->CalcScrolledPosition(item->GetX(), item->GetY(), &x, &y);
+    SelectAll();
+}
 
-    int image_h = 0,
-        image_w = 0;
+void wxTreeTextCtrl::EndEdit(bool discardChanges)
+{
+    m_aboutToFinish = true;
 
-    int image = item->GetCurrentImage();
-    if ( image != NO_IMAGE )
+    if ( discardChanges )
     {
-        if ( m_owner->m_imageListNormal )
-        {
-            m_owner->m_imageListNormal->GetSize( image, image_w, image_h );
-            image_w += 4;
-        }
-        else
-        {
-            wxFAIL_MSG(_T("you must create an image list to use images!"));
-        }
-    }
+        m_owner->OnRenameCancelled(m_itemEdited);
 
-    // FIXME: what are all these hardcoded 4, 8 and 11s really?
-    x += image_w;
-    w -= image_w + 4;
+        Finish( true );
+    }
+    else
+    {
+        // Notify the owner about the changes
+        AcceptChanges();
 
-    (void)Create(m_owner, wxID_ANY, m_startValue,
-                 wxPoint(x - 4, y - 4), wxSize(w + 11, h + 8));
+        // Even if vetoed, close the control (consistent with MSW)
+        Finish( true );
+    }
 }
 
 bool wxTreeTextCtrl::AcceptChanges()
@@ -369,33 +484,35 @@ bool wxTreeTextCtrl::AcceptChanges()
     if ( value == m_startValue )
     {
         // nothing changed, always accept
-        return TRUE;
+        // when an item remains unchanged, the owner
+        // needs to be notified that the user decided
+        // not to change the tree item label, and that
+        // the edit has been cancelled
+
+        m_owner->OnRenameCancelled(m_itemEdited);
+        return true;
     }
 
     if ( !m_owner->OnRenameAccept(m_itemEdited, value) )
     {
         // vetoed by the user
-        return FALSE;
+        return false;
     }
 
     // accepted, do rename the item
     m_owner->SetItemText(m_itemEdited, value);
 
-    return TRUE;
+    return true;
 }
 
-void wxTreeTextCtrl::Finish()
+void wxTreeTextCtrl::Finish( bool setfocus )
 {
-    if ( !m_finished )
-    {
-        m_owner->ResetTextControl();
-
-        wxPendingDelete.Append(this);
+    m_owner->ResetTextControl();
 
-        m_finished = TRUE;
+    wxPendingDelete.Append(this);
 
-        m_owner->SetFocus(); // This doesn't work. TODO.
-    }
+    if (setfocus)
+        m_owner->SetFocus();
 }
 
 void wxTreeTextCtrl::OnChar( wxKeyEvent &event )
@@ -403,16 +520,11 @@ void wxTreeTextCtrl::OnChar( wxKeyEvent &event )
     switch ( event.m_keyCode )
     {
         case WXK_RETURN:
-            if ( !AcceptChanges() )
-            {
-                // vetoed by the user, don't disappear
-                break;
-            }
-            //else: fall through
+            EndEdit( false );
+            break;
 
         case WXK_ESCAPE:
-            Finish();
-            m_owner->OnRenameCancelled(m_itemEdited);
+            EndEdit( true );
             break;
 
         default:
@@ -422,19 +534,19 @@ void wxTreeTextCtrl::OnChar( wxKeyEvent &event )
 
 void wxTreeTextCtrl::OnKeyUp( wxKeyEvent &event )
 {
-    if ( !m_finished )
+    if ( !m_aboutToFinish )
     {
         // auto-grow the textctrl:
         wxSize parentSize = m_owner->GetSize();
         wxPoint myPos = GetPosition();
         wxSize mySize = GetSize();
         int sx, sy;
-        GetTextExtent(GetValue() + _T("M"), &sx, &sy);
+        GetTextExtent(GetValue() + wxT("M"), &sx, &sy);
         if (myPos.x + sx > parentSize.x)
             sx = parentSize.x - myPos.x;
         if (mySize.x > sx)
             sx = mySize.x;
-        SetSize(sx, -1);
+        SetSize(sx, wxDefaultCoord);
     }
 
     event.Skip();
@@ -442,16 +554,16 @@ void wxTreeTextCtrl::OnKeyUp( wxKeyEvent &event )
 
 void wxTreeTextCtrl::OnKillFocus( wxFocusEvent &event )
 {
-    if ( m_finished )
+    if ( !m_aboutToFinish )
     {
-        event.Skip();
-        return;
-    }
+        if ( !AcceptChanges() )
+            m_owner->OnRenameCancelled( m_itemEdited );
 
-    if ( AcceptChanges() )
-    {
-        Finish();
+        Finish( false );
     }
+
+    // We should let the native text control handle focus, too.
+    event.Skip();
 }
 
 // -----------------------------------------------------------------------------
@@ -470,21 +582,25 @@ wxGenericTreeItem::wxGenericTreeItem(wxGenericTreeItem *parent,
     m_images[wxTreeItemIcon_SelectedExpanded] = NO_IMAGE;
 
     m_data = data;
+    m_state = wxTREE_ITEMSTATE_NONE;
     m_x = m_y = 0;
 
-    m_isCollapsed = TRUE;
-    m_hasHilight = FALSE;
-    m_hasPlus = FALSE;
-    m_isBold = FALSE;
+    m_isCollapsed = true;
+    m_hasHilight = false;
+    m_hasPlus = false;
+    m_isBold = false;
 
     m_parent = parent;
 
-    m_attr = (wxTreeItemAttr *)NULL;
-    m_ownsAttr = FALSE;
+    m_attr = NULL;
+    m_ownsAttr = false;
 
     // We don't know the height here yet.
     m_width = 0;
     m_height = 0;
+
+    m_widthText = -1;
+    m_heightText = -1;
 }
 
 wxGenericTreeItem::~wxGenericTreeItem()
@@ -494,33 +610,29 @@ wxGenericTreeItem::~wxGenericTreeItem()
     if (m_ownsAttr) delete m_attr;
 
     wxASSERT_MSG( m_children.IsEmpty(),
-                  wxT("please call DeleteChildren() before deleting the item") );
+                  "must call DeleteChildren() before deleting the item" );
 }
 
 void wxGenericTreeItem::DeleteChildren(wxGenericTreeCtrl *tree)
 {
-    size_t count = m_children.Count();
+    size_t count = m_children.GetCount();
     for ( size_t n = 0; n < count; n++ )
     {
         wxGenericTreeItem *child = m_children[n];
-        if (tree)
-            tree->SendDeleteEvent(child);
+        tree->SendDeleteEvent(child);
 
         child->DeleteChildren(tree);
+        if ( child == tree->m_select_me )
+            tree->m_select_me = NULL;
         delete child;
     }
 
     m_children.Empty();
 }
 
-void wxGenericTreeItem::SetText( const wxString &text )
-{
-    m_text = text;
-}
-
 size_t wxGenericTreeItem::GetChildrenCount(bool recursively) const
 {
-    size_t count = m_children.Count();
+    size_t count = m_children.GetCount();
     if ( !recursively )
         return count;
 
@@ -543,7 +655,7 @@ void wxGenericTreeItem::GetSize( int &x, int &y,
 
     if (IsExpanded())
     {
-        size_t count = m_children.Count();
+        size_t count = m_children.GetCount();
         for ( size_t n = 0; n < count; ++n )
         {
             m_children[n]->GetSize( x, y, theButton );
@@ -578,8 +690,8 @@ wxGenericTreeItem *wxGenericTreeItem::HitTest(const wxPoint& point,
                 HasPlus() && theCtrl->HasButtons() )
 #else
             // 5 is the size of the plus sign
-            if ((point.x > xCross-5) && (point.x < xCross+5) &&
-                (point.y > y_mid-5) && (point.y < y_mid+5) &&
+            if ((point.x > xCross-6) && (point.x < xCross+6) &&
+                (point.y > y_mid-6) && (point.y < y_mid+6) &&
                 HasPlus() && theCtrl->HasButtons() )
 #endif
             {
@@ -594,10 +706,29 @@ wxGenericTreeItem *wxGenericTreeItem::HitTest(const wxPoint& point,
 
                 // assuming every image (normal and selected) has the same size!
                 if ( (GetImage() != NO_IMAGE) && theCtrl->m_imageListNormal )
+                {
                     theCtrl->m_imageListNormal->GetSize(GetImage(),
                                                         image_w, image_h);
+                }
+
+                int state_w = -1;
+                int state_h;
 
-                if ((image_w != -1) && (point.x <= m_x + image_w + 1))
+                if ( (GetState() != wxTREE_ITEMSTATE_NONE) &&
+                        theCtrl->m_imageListState )
+                {
+                    theCtrl->m_imageListState->GetSize(GetState(),
+                                                       state_w, state_h);
+                }
+
+                if ((state_w != -1) && (point.x <= m_x + state_w + 1))
+                    flags |= wxTREE_HITTEST_ONITEMSTATEICON;
+                else if ((image_w != -1) &&
+                         (point.x <= m_x +
+                            (state_w != -1 ? state_w +
+                                                MARGIN_BETWEEN_STATE_AND_IMAGE
+                                           : 0)
+                                            + image_w + 1))
                     flags |= wxTREE_HITTEST_ONITEMICON;
                 else
                     flags |= wxTREE_HITTEST_ONITEMLABEL;
@@ -614,11 +745,11 @@ wxGenericTreeItem *wxGenericTreeItem::HitTest(const wxPoint& point,
         }
 
         // if children are expanded, fall through to evaluate them
-        if (m_isCollapsed) return (wxGenericTreeItem*) NULL;
+        if (m_isCollapsed) return NULL;
     }
 
     // evaluate children
-    size_t count = m_children.Count();
+    size_t count = m_children.GetCount();
     for ( size_t n = 0; n < count; n++ )
     {
         wxGenericTreeItem *res = m_children[n]->HitTest( point,
@@ -629,7 +760,7 @@ wxGenericTreeItem *wxGenericTreeItem::HitTest(const wxPoint& point,
             return res;
     }
 
-    return (wxGenericTreeItem*) NULL;
+    return NULL;
 }
 
 int wxGenericTreeItem::GetCurrentImage() const
@@ -662,38 +793,134 @@ int wxGenericTreeItem::GetCurrentImage() const
     return image;
 }
 
+void wxGenericTreeItem::CalculateSize(wxGenericTreeCtrl* control)
+{
+    // check if we need to do anything before creating the DC
+    if ( m_width != 0 )
+        return;
+
+    wxClientDC dc(control);
+    DoCalculateSize(control, dc, false /* normal font not used */);
+}
+
+void
+wxGenericTreeItem::DoCalculateSize(wxGenericTreeCtrl* control,
+                                   wxDC& dc,
+                                   bool dcUsesNormalFont)
+{
+    if ( m_width != 0 ) // Size known, nothing to do
+        return;
+
+    if ( m_widthText == -1 )
+    {
+        bool fontChanged;
+        if ( SetFont(control, dc) )
+        {
+            fontChanged = true;
+        }
+        else // we have no special font
+        {
+           if ( !dcUsesNormalFont )
+           {
+               // but we do need to ensure that the normal font is used: notice
+               // that this doesn't count as changing the font as we don't need
+               // to restore it
+               dc.SetFont(control->m_normalFont);
+           }
+
+           fontChanged = false;
+        }
+
+        dc.GetTextExtent( GetText(), &m_widthText, &m_heightText );
+
+        // restore normal font if the DC used it previously and we changed it
+        if ( fontChanged )
+             dc.SetFont(control->m_normalFont);
+    }
+
+    int text_h = m_heightText + 2;
+
+    int image_h = 0, image_w = 0;
+    int image = GetCurrentImage();
+    if ( image != NO_IMAGE && control->m_imageListNormal )
+    {
+        control->m_imageListNormal->GetSize(image, image_w, image_h);
+        image_w += MARGIN_BETWEEN_IMAGE_AND_TEXT;
+    }
+
+    int state_h = 0, state_w = 0;
+    int state = GetState();
+    if ( state != wxTREE_ITEMSTATE_NONE && control->m_imageListState )
+    {
+        control->m_imageListState->GetSize(state, state_w, state_h);
+        if ( image_w != 0 )
+            state_w += MARGIN_BETWEEN_STATE_AND_IMAGE;
+        else
+            state_w += MARGIN_BETWEEN_IMAGE_AND_TEXT;
+    }
+
+    int img_h = wxMax(state_h, image_h);
+    m_height = wxMax(img_h, text_h);
+
+    if (m_height < 30)
+        m_height += 2;            // at least 2 pixels
+    else
+        m_height += m_height / 10;   // otherwise 10% extra spacing
+
+    if (m_height > control->m_lineHeight)
+        control->m_lineHeight = m_height;
+
+    m_width = state_w + image_w + m_widthText + 2;
+}
+
+void wxGenericTreeItem::RecursiveResetSize()
+{
+    m_width = 0;
+
+    const size_t count = m_children.Count();
+    for (size_t i = 0; i < count; i++ )
+        m_children[i]->RecursiveResetSize();
+}
+
+void wxGenericTreeItem::RecursiveResetTextSize()
+{
+    m_width = 0;
+    m_widthText = -1;
+
+    const size_t count = m_children.Count();
+    for (size_t i = 0; i < count; i++ )
+        m_children[i]->RecursiveResetTextSize();
+}
+
 // -----------------------------------------------------------------------------
 // wxGenericTreeCtrl implementation
 // -----------------------------------------------------------------------------
 
-IMPLEMENT_DYNAMIC_CLASS(wxGenericTreeCtrl, wxScrolledWindow)
+IMPLEMENT_DYNAMIC_CLASS(wxGenericTreeCtrl, wxControl)
 
-BEGIN_EVENT_TABLE(wxGenericTreeCtrl,wxScrolledWindow)
+BEGIN_EVENT_TABLE(wxGenericTreeCtrl, wxTreeCtrlBase)
     EVT_PAINT          (wxGenericTreeCtrl::OnPaint)
+    EVT_SIZE           (wxGenericTreeCtrl::OnSize)
     EVT_MOUSE_EVENTS   (wxGenericTreeCtrl::OnMouse)
+    EVT_KEY_DOWN       (wxGenericTreeCtrl::OnKeyDown)
     EVT_CHAR           (wxGenericTreeCtrl::OnChar)
     EVT_SET_FOCUS      (wxGenericTreeCtrl::OnSetFocus)
     EVT_KILL_FOCUS     (wxGenericTreeCtrl::OnKillFocus)
+    EVT_TREE_ITEM_GETTOOLTIP(wxID_ANY, wxGenericTreeCtrl::OnGetToolTip)
 END_EVENT_TABLE()
 
-#if !defined(__WXMSW__) || defined(__WIN16__) || defined(__WXUNIVERSAL__)
-/*
- * wxTreeCtrl has to be a real class or we have problems with
- * the run-time information.
- */
-
-IMPLEMENT_DYNAMIC_CLASS(wxTreeCtrl, wxGenericTreeCtrl)
-#endif
-
 // -----------------------------------------------------------------------------
 // construction/destruction
 // -----------------------------------------------------------------------------
 
 void wxGenericTreeCtrl::Init()
 {
-    m_current = m_key_current = m_anchor = m_select_me = (wxGenericTreeItem *) NULL;
-    m_hasFocus = FALSE;
-    m_dirty = FALSE;
+    m_current =
+    m_key_current =
+    m_anchor =
+    m_select_me = NULL;
+    m_hasFocus = false;
+    m_dirty = false;
 
     m_lineHeight = 10;
     m_indent = 15;
@@ -705,7 +932,7 @@ void wxGenericTreeCtrl::Init()
                             (
                                 wxSYS_COLOUR_HIGHLIGHT
                             ),
-                            wxSOLID
+                            wxBRUSHSTYLE_SOLID
                          );
 
     m_hilightUnfocusedBrush = new wxBrush
@@ -714,32 +941,36 @@ void wxGenericTreeCtrl::Init()
                                  (
                                      wxSYS_COLOUR_BTNSHADOW
                                  ),
-                                 wxSOLID
+                                 wxBRUSHSTYLE_SOLID
                               );
 
-    m_imageListNormal = m_imageListButtons =
-    m_imageListState = (wxImageList *) NULL;
-    m_ownsImageListNormal = m_ownsImageListButtons =
-    m_ownsImageListState = FALSE;
+    m_imageListButtons = NULL;
+    m_ownsImageListButtons = false;
 
     m_dragCount = 0;
-    m_isDragging = FALSE;
-    m_dropTarget = m_oldSelection = (wxGenericTreeItem *)NULL;
+    m_isDragging = false;
+    m_dropTarget = m_oldSelection = NULL;
+    m_underMouse = NULL;
     m_textCtrl = NULL;
 
     m_renameTimer = NULL;
+
     m_findTimer = NULL;
+    m_findBell = 0;  // default is to not ring bell at all
+
+    m_dropEffectAboveItem = false;
+
+    m_dndEffect = NoEffect;
+    m_dndEffectItem = NULL;
 
-    m_lastOnSame = FALSE;
+    m_lastOnSame = false;
 
+#if defined( __WXMAC__ )
+    m_normalFont = wxFont(wxOSX_SYSTEM_FONT_VIEWS);
+#else
     m_normalFont = wxSystemSettings::GetFont( wxSYS_DEFAULT_GUI_FONT );
-    m_boldFont = wxFont(m_normalFont.GetPointSize(),
-                        m_normalFont.GetFamily(),
-                        m_normalFont.GetStyle(),
-                        wxBOLD,
-                        m_normalFont.GetUnderlined(),
-                        m_normalFont.GetFaceName(),
-                        m_normalFont.GetEncoding());
+#endif
+    m_boldFont = m_normalFont.Bold();
 }
 
 bool wxGenericTreeCtrl::Create(wxWindow *parent,
@@ -747,21 +978,30 @@ bool wxGenericTreeCtrl::Create(wxWindow *parent,
                                const wxPoint& pos,
                                const wxSize& size,
                                long style,
-                               const wxValidator &validator,
+                               const wxValidatorvalidator,
                                const wxString& name )
 {
 #ifdef __WXMAC__
-    int major,minor;
-    wxGetOsVersion( &major, &minor );
+    int major, minor;
+    wxGetOsVersion(&major, &minor);
 
-    style &= ~wxTR_LINES_AT_ROOT;
-    style |= wxTR_NO_LINES;
     if (major < 10)
         style |= wxTR_ROW_LINES;
+
+    if (style & wxTR_HAS_BUTTONS)
+        style |= wxTR_NO_LINES;
 #endif // __WXMAC__
 
-    wxScrolledWindow::Create( parent, id, pos, size,
-                              style|wxHSCROLL|wxVSCROLL, name );
+#ifdef __WXGTK20__
+    if (style & wxTR_HAS_BUTTONS)
+        style |= wxTR_NO_LINES;
+#endif
+
+    if ( !wxControl::Create( parent, id, pos, size,
+                             style|wxHSCROLL|wxVSCROLL|wxWANTS_CHARS,
+                             validator,
+                             name ) )
+        return false;
 
     // If the tree display has no buttons, but does have
     // connecting lines, we can use a narrower layout.
@@ -772,17 +1012,24 @@ bool wxGenericTreeCtrl::Create(wxWindow *parent,
         m_spacing = 10;
     }
 
-#if wxUSE_VALIDATORS
-    SetValidator( validator );
+    wxVisualAttributes attr = GetDefaultAttributes();
+    SetOwnForegroundColour( attr.colFg );
+    SetOwnBackgroundColour( attr.colBg );
+    if (!m_hasFont)
+        SetOwnFont(attr.font);
+
+    // this is a misnomer: it's called "dotted pen" but uses (default) wxSOLID
+    // style because we apparently get performance problems when using dotted
+    // pen for drawing in some ports -- but under MSW it seems to work fine
+#ifdef __WXMSW__
+    m_dottedPen = wxPen(*wxLIGHT_GREY, 0, wxPENSTYLE_DOT);
+#else
+    m_dottedPen = *wxGREY_PEN;
 #endif
 
-    SetForegroundColour( wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT) );
-    SetBackgroundColour( wxSystemSettings::GetColour(wxSYS_COLOUR_LISTBOX) );
+    SetInitialSize(size);
 
-//  m_dottedPen = wxPen( "grey", 0, wxDOT );  too slow under XFree86
-    m_dottedPen = wxPen( wxT("grey"), 0, 0 );
-
-    return TRUE;
+    return true;
 }
 
 wxGenericTreeCtrl::~wxGenericTreeCtrl()
@@ -795,36 +1042,46 @@ wxGenericTreeCtrl::~wxGenericTreeCtrl()
     delete m_renameTimer;
     delete m_findTimer;
 
-    if (m_ownsImageListNormal)
-        delete m_imageListNormal;
-    if (m_ownsImageListState)
-        delete m_imageListState;
     if (m_ownsImageListButtons)
         delete m_imageListButtons;
 }
 
+void wxGenericTreeCtrl::EnableBellOnNoMatch( bool on )
+{
+    m_findBell = on;
+}
+
 // -----------------------------------------------------------------------------
 // accessors
 // -----------------------------------------------------------------------------
 
-size_t wxGenericTreeCtrl::GetCount() const
+unsigned int wxGenericTreeCtrl::GetCount() const
 {
-    return m_anchor == NULL ? 0u : m_anchor->GetChildrenCount();
+    if ( !m_anchor )
+    {
+        // the tree is empty
+        return 0;
+    }
+
+    unsigned int count = m_anchor->GetChildrenCount();
+    if ( !HasFlag(wxTR_HIDE_ROOT) )
+    {
+        // take the root itself into account
+        count++;
+    }
+
+    return count;
 }
 
 void wxGenericTreeCtrl::SetIndent(unsigned int indent)
 {
     m_indent = (unsigned short) indent;
-    m_dirty = TRUE;
+    m_dirty = true;
 }
 
-void wxGenericTreeCtrl::SetSpacing(unsigned int spacing)
-{
-    m_spacing = (unsigned short) spacing;
-    m_dirty = TRUE;
-}
-
-size_t wxGenericTreeCtrl::GetChildrenCount(const wxTreeItemId& item, bool recursively)
+size_t
+wxGenericTreeCtrl::GetChildrenCount(const wxTreeItemId& item,
+                                    bool recursively) const
 {
     wxCHECK_MSG( item.IsOk(), 0u, wxT("invalid tree item") );
 
@@ -833,7 +1090,8 @@ size_t wxGenericTreeCtrl::GetChildrenCount(const wxTreeItemId& item, bool recurs
 
 void wxGenericTreeCtrl::SetWindowStyle(const long styles)
 {
-    if (!HasFlag(wxTR_HIDE_ROOT) && (styles & wxTR_HIDE_ROOT))
+    // Do not try to expand the root node if it hasn't been created yet
+    if (m_anchor && !HasFlag(wxTR_HIDE_ROOT) && (styles & wxTR_HIDE_ROOT))
     {
         // if we will hide the root, make sure children are visible
         m_anchor->SetHasPlus();
@@ -845,7 +1103,7 @@ void wxGenericTreeCtrl::SetWindowStyle(const long styles)
     // want to update the inherited styles, but right now
     // none of the parents has updatable styles
     m_windowStyle = styles;
-    m_dirty = TRUE;
+    m_dirty = true;
 }
 
 // -----------------------------------------------------------------------------
@@ -854,7 +1112,7 @@ void wxGenericTreeCtrl::SetWindowStyle(const long styles)
 
 wxString wxGenericTreeCtrl::GetItemText(const wxTreeItemId& item) const
 {
-    wxCHECK_MSG( item.IsOk(), wxT(""), wxT("invalid tree item") );
+    wxCHECK_MSG( item.IsOk(), wxEmptyString, wxT("invalid tree item") );
 
     return ((wxGenericTreeItem*) item.m_pItem)->GetText();
 }
@@ -874,6 +1132,14 @@ wxTreeItemData *wxGenericTreeCtrl::GetItemData(const wxTreeItemId& item) const
     return ((wxGenericTreeItem*) item.m_pItem)->GetData();
 }
 
+int wxGenericTreeCtrl::DoGetItemState(const wxTreeItemId& item) const
+{
+    wxCHECK_MSG( item.IsOk(), wxTREE_ITEMSTATE_NONE, wxT("invalid tree item") );
+
+    wxGenericTreeItem *pItem = (wxGenericTreeItem*) item.m_pItem;
+    return pItem->GetState();
+}
+
 wxColour wxGenericTreeCtrl::GetItemTextColour(const wxTreeItemId& item) const
 {
     wxCHECK_MSG( item.IsOk(), wxNullColour, wxT("invalid tree item") );
@@ -882,7 +1148,8 @@ wxColour wxGenericTreeCtrl::GetItemTextColour(const wxTreeItemId& item) const
     return pItem->Attr().GetTextColour();
 }
 
-wxColour wxGenericTreeCtrl::GetItemBackgroundColour(const wxTreeItemId& item) const
+wxColour
+wxGenericTreeCtrl::GetItemBackgroundColour(const wxTreeItemId& item) const
 {
     wxCHECK_MSG( item.IsOk(), wxNullColour, wxT("invalid tree item") );
 
@@ -898,14 +1165,14 @@ wxFont wxGenericTreeCtrl::GetItemFont(const wxTreeItemId& item) const
     return pItem->Attr().GetFont();
 }
 
-void wxGenericTreeCtrl::SetItemText(const wxTreeItemId& item, const wxString& text)
+void
+wxGenericTreeCtrl::SetItemText(const wxTreeItemId& item, const wxString& text)
 {
     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
 
-    wxClientDC dc(this);
     wxGenericTreeItem *pItem = (wxGenericTreeItem*) item.m_pItem;
     pItem->SetText(text);
-    CalculateSize(pItem, dc);
+    pItem->CalculateSize(this);
     RefreshLine(pItem);
 }
 
@@ -917,19 +1184,31 @@ void wxGenericTreeCtrl::SetItemImage(const wxTreeItemId& item,
 
     wxGenericTreeItem *pItem = (wxGenericTreeItem*) item.m_pItem;
     pItem->SetImage(image, which);
-
-    wxClientDC dc(this);
-    CalculateSize(pItem, dc);
+    pItem->CalculateSize(this);
     RefreshLine(pItem);
 }
 
-void wxGenericTreeCtrl::SetItemData(const wxTreeItemId& item, wxTreeItemData *data)
+void
+wxGenericTreeCtrl::SetItemData(const wxTreeItemId& item, wxTreeItemData *data)
 {
     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
 
+    if (data)
+        data->SetId( item );
+
     ((wxGenericTreeItem*) item.m_pItem)->SetData(data);
 }
 
+void wxGenericTreeCtrl::DoSetItemState(const wxTreeItemId& item, int state)
+{
+    wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
+
+    wxGenericTreeItem *pItem = (wxGenericTreeItem*) item.m_pItem;
+    pItem->SetState(state);
+    pItem->CalculateSize(this);
+    RefreshLine(pItem);
+}
+
 void wxGenericTreeCtrl::SetItemHasChildren(const wxTreeItemId& item, bool has)
 {
     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
@@ -948,10 +1227,33 @@ void wxGenericTreeCtrl::SetItemBold(const wxTreeItemId& item, bool bold)
     if ( pItem->IsBold() != bold )
     {
         pItem->SetBold(bold);
+
+        // recalculate the item size as bold and non bold fonts have different
+        // widths
+        pItem->CalculateSize(this);
         RefreshLine(pItem);
     }
 }
 
+void wxGenericTreeCtrl::SetItemDropHighlight(const wxTreeItemId& item,
+                                             bool highlight)
+{
+    wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
+
+    wxColour fg, bg;
+
+    if (highlight)
+    {
+        bg = wxSystemSettings::GetColour(wxSYS_COLOUR_HIGHLIGHT);
+        fg = wxSystemSettings::GetColour(wxSYS_COLOUR_HIGHLIGHTTEXT);
+    }
+
+    wxGenericTreeItem *pItem = (wxGenericTreeItem*) item.m_pItem;
+    pItem->Attr().SetTextColour(fg);
+    pItem->Attr().SetBackgroundColour(bg);
+    RefreshLine(pItem);
+}
+
 void wxGenericTreeCtrl::SetItemTextColour(const wxTreeItemId& item,
                                    const wxColour& col)
 {
@@ -972,29 +1274,29 @@ void wxGenericTreeCtrl::SetItemBackgroundColour(const wxTreeItemId& item,
     RefreshLine(pItem);
 }
 
-void wxGenericTreeCtrl::SetItemFont(const wxTreeItemId& item, const wxFont& font)
+void
+wxGenericTreeCtrl::SetItemFont(const wxTreeItemId& item, const wxFont& font)
 {
     wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
 
     wxGenericTreeItem *pItem = (wxGenericTreeItem*) item.m_pItem;
     pItem->Attr().SetFont(font);
+    pItem->ResetTextSize();
+    pItem->CalculateSize(this);
     RefreshLine(pItem);
 }
 
 bool wxGenericTreeCtrl::SetFont( const wxFont &font )
 {
-    wxScrolledWindow::SetFont(font);
+    wxTreeCtrlBase::SetFont(font);
+
+    m_normalFont = font;
+    m_boldFont = m_normalFont.Bold();
 
-    m_normalFont = font ;
-    m_boldFont = wxFont(m_normalFont.GetPointSize(),
-                        m_normalFont.GetFamily(),
-                        m_normalFont.GetStyle(),
-                        wxBOLD,
-                        m_normalFont.GetUnderlined(),
-                        m_normalFont.GetFaceName(),
-                        m_normalFont.GetEncoding());
+    if (m_anchor)
+        m_anchor->RecursiveResetTextSize();
 
-    return TRUE;
+    return true;
 }
 
 
@@ -1004,7 +1306,7 @@ bool wxGenericTreeCtrl::SetFont( const wxFont &font )
 
 bool wxGenericTreeCtrl::IsVisible(const wxTreeItemId& item) const
 {
-    wxCHECK_MSG( item.IsOk(), FALSE, wxT("invalid tree item") );
+    wxCHECK_MSG( item.IsOk(), false, wxT("invalid tree item") );
 
     // An item is only visible if it's not a descendant of a collapsed item
     wxGenericTreeItem *pItem = (wxGenericTreeItem*) item.m_pItem;
@@ -1012,7 +1314,7 @@ bool wxGenericTreeCtrl::IsVisible(const wxTreeItemId& item) const
     while (parent)
     {
         if (!parent->IsExpanded())
-            return FALSE;
+            return false;
         parent = parent->GetParent();
     }
 
@@ -1023,20 +1325,20 @@ bool wxGenericTreeCtrl::IsVisible(const wxTreeItemId& item) const
 
     wxRect rect;
     if (!GetBoundingRect(item, rect))
-        return FALSE;
+        return false;
     if (rect.GetWidth() == 0 || rect.GetHeight() == 0)
-        return FALSE;
+        return false;
     if (rect.GetBottom() < 0 || rect.GetTop() > clientSize.y)
-        return FALSE;
+        return false;
     if (rect.GetRight() < 0 || rect.GetLeft() > clientSize.x)
-        return FALSE;
+        return false;
 
-    return TRUE;
+    return true;
 }
 
 bool wxGenericTreeCtrl::ItemHasChildren(const wxTreeItemId& item) const
 {
-    wxCHECK_MSG( item.IsOk(), FALSE, wxT("invalid tree item") );
+    wxCHECK_MSG( item.IsOk(), false, wxT("invalid tree item") );
 
     // consider that the item does have children if it has the "+" button: it
     // might not have them (if it had never been expanded yet) but then it
@@ -1048,21 +1350,21 @@ bool wxGenericTreeCtrl::ItemHasChildren(const wxTreeItemId& item) const
 
 bool wxGenericTreeCtrl::IsExpanded(const wxTreeItemId& item) const
 {
-    wxCHECK_MSG( item.IsOk(), FALSE, wxT("invalid tree item") );
+    wxCHECK_MSG( item.IsOk(), false, wxT("invalid tree item") );
 
     return ((wxGenericTreeItem*) item.m_pItem)->IsExpanded();
 }
 
 bool wxGenericTreeCtrl::IsSelected(const wxTreeItemId& item) const
 {
-    wxCHECK_MSG( item.IsOk(), FALSE, wxT("invalid tree item") );
+    wxCHECK_MSG( item.IsOk(), false, wxT("invalid tree item") );
 
     return ((wxGenericTreeItem*) item.m_pItem)->IsSelected();
 }
 
 bool wxGenericTreeCtrl::IsBold(const wxTreeItemId& item) const
 {
-    wxCHECK_MSG( item.IsOk(), FALSE, wxT("invalid tree item") );
+    wxCHECK_MSG( item.IsOk(), false, wxT("invalid tree item") );
 
     return ((wxGenericTreeItem*) item.m_pItem)->IsBold();
 }
@@ -1092,12 +1394,13 @@ wxTreeItemId wxGenericTreeCtrl::GetNextChild(const wxTreeItemId& item,
 {
     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
 
-    wxArrayGenericTreeItems& children = ((wxGenericTreeItem*) item.m_pItem)->GetChildren();
+    wxArrayGenericTreeItems&
+        children = ((wxGenericTreeItem*) item.m_pItem)->GetChildren();
 
     // it's ok to cast cookie to size_t, we never have indices big enough to
     // overflow "void *"
     size_t *pIndex = (size_t *)&cookie;
-    if ( *pIndex < children.Count() )
+    if ( *pIndex < children.GetCount() )
     {
         return children.Item((*pIndex)++);
     }
@@ -1108,42 +1411,13 @@ wxTreeItemId wxGenericTreeCtrl::GetNextChild(const wxTreeItemId& item,
     }
 }
 
-#if WXWIN_COMPATIBILITY_2_4
-
-wxTreeItemId wxGenericTreeCtrl::GetFirstChild(const wxTreeItemId& item,
-                                              long& cookie) const
-{
-    wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
-
-    cookie = 0;
-    return GetNextChild(item, cookie);
-}
-
-wxTreeItemId wxGenericTreeCtrl::GetNextChild(const wxTreeItemId& item,
-                                             long& cookie) const
-{
-    wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
-
-    wxArrayGenericTreeItems& children = ((wxGenericTreeItem*) item.m_pItem)->GetChildren();
-    if ( (size_t)cookie < children.Count() )
-    {
-        return children.Item((size_t)cookie++);
-    }
-    else
-    {
-        // there are no more of them
-        return wxTreeItemId();
-    }
-}
-
-#endif // WXWIN_COMPATIBILITY_2_4
-
 wxTreeItemId wxGenericTreeCtrl::GetLastChild(const wxTreeItemId& item) const
 {
     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
 
-    wxArrayGenericTreeItems& children = ((wxGenericTreeItem*) item.m_pItem)->GetChildren();
-    return (children.IsEmpty() ? wxTreeItemId() : wxTreeItemId(children.Last()));
+    wxArrayGenericTreeItems&
+        children = ((wxGenericTreeItem*) item.m_pItem)->GetChildren();
+    return children.IsEmpty() ? wxTreeItemId() : wxTreeItemId(children.Last());
 }
 
 wxTreeItemId wxGenericTreeCtrl::GetNextSibling(const wxTreeItemId& item) const
@@ -1163,7 +1437,8 @@ wxTreeItemId wxGenericTreeCtrl::GetNextSibling(const wxTreeItemId& item) const
     wxASSERT( index != wxNOT_FOUND ); // I'm not a child of my parent?
 
     size_t n = (size_t)(index + 1);
-    return n == siblings.Count() ? wxTreeItemId() : wxTreeItemId(siblings[n]);
+    return n == siblings.GetCount() ? wxTreeItemId()
+                                    : wxTreeItemId(siblings[n]);
 }
 
 wxTreeItemId wxGenericTreeCtrl::GetPrevSibling(const wxTreeItemId& item) const
@@ -1215,16 +1490,16 @@ wxTreeItemId wxGenericTreeCtrl::GetNext(const wxTreeItemId& item) const
 
 wxTreeItemId wxGenericTreeCtrl::GetFirstVisibleItem() const
 {
-    wxTreeItemId id = GetRootItem();
-    if (!id.IsOk())
-        return id;
+    wxTreeItemId itemid = GetRootItem();
+    if (!itemid.IsOk())
+        return itemid;
 
     do
     {
-        if (IsVisible(id))
-              return id;
-        id = GetNext(id);
-    } while (id.IsOk());
+        if (IsVisible(itemid))
+              return itemid;
+        itemid = GetNext(itemid);
+    } while (itemid.IsOk());
 
     return wxTreeItemId();
 }
@@ -1232,6 +1507,7 @@ wxTreeItemId wxGenericTreeCtrl::GetFirstVisibleItem() const
 wxTreeItemId wxGenericTreeCtrl::GetNextVisible(const wxTreeItemId& item) const
 {
     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
+    wxASSERT_MSG( IsVisible(item), wxT("this item itself should be visible") );
 
     wxTreeItemId id = item;
     if (id.IsOk())
@@ -1248,16 +1524,50 @@ wxTreeItemId wxGenericTreeCtrl::GetNextVisible(const wxTreeItemId& item) const
 wxTreeItemId wxGenericTreeCtrl::GetPrevVisible(const wxTreeItemId& item) const
 {
     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
+    wxASSERT_MSG( IsVisible(item), wxT("this item itself should be visible") );
 
-    wxFAIL_MSG(wxT("not implemented"));
+    // find out the starting point
+    wxTreeItemId prevItem = GetPrevSibling(item);
+    if ( !prevItem.IsOk() )
+    {
+        prevItem = GetItemParent(item);
+    }
 
-    return wxTreeItemId();
+    // find the first visible item after it
+    while ( prevItem.IsOk() && !IsVisible(prevItem) )
+    {
+        prevItem = GetNext(prevItem);
+        if ( !prevItem.IsOk() || prevItem == item )
+        {
+            // there are no visible items before item
+            return wxTreeItemId();
+        }
+    }
+
+    // from there we must be able to navigate until this item
+    while ( prevItem.IsOk() )
+    {
+        const wxTreeItemId nextItem = GetNextVisible(prevItem);
+        if ( !nextItem.IsOk() || nextItem == item )
+            break;
+
+        prevItem = nextItem;
+    }
+
+    return prevItem;
 }
 
 // called by wxTextTreeCtrl when it marks itself for deletion
 void wxGenericTreeCtrl::ResetTextControl()
 {
-  m_textCtrl = NULL;
+    m_textCtrl = NULL;
+}
+
+void wxGenericTreeCtrl::ResetFindState()
+{
+    m_findPrefix.clear();
+    if ( m_findBell )
+        m_findBell = 1;
 }
 
 // find the first item starting with the given prefix after the given item
@@ -1273,37 +1583,44 @@ wxTreeItemId wxGenericTreeCtrl::FindItem(const wxTreeItemId& idParent,
     // allows to switch between two items starting with the same letter just by
     // pressing it) but we shouldn't jump to the next one if the user is
     // continuing to type as otherwise he might easily skip the item he wanted
-    wxTreeItemId id = idParent;
+    wxTreeItemId itemid = idParent;
     if ( prefix.length() == 1 )
     {
-        id = GetNext(id);
+        itemid = GetNext(itemid);
     }
 
     // look for the item starting with the given prefix after it
-    while ( id.IsOk() && !GetItemText(id).Lower().StartsWith(prefix) )
+    while ( itemid.IsOk() && !GetItemText(itemid).Lower().StartsWith(prefix) )
     {
-        id = GetNext(id);
+        itemid = GetNext(itemid);
     }
 
     // if we haven't found anything...
-    if ( !id.IsOk() )
+    if ( !itemid.IsOk() )
     {
         // ... wrap to the beginning
-        id = GetRootItem();
+        itemid = GetRootItem();
         if ( HasFlag(wxTR_HIDE_ROOT) )
         {
             // can't select virtual root
-            id = GetNext(id);
+            itemid = GetNext(itemid);
         }
 
         // and try all the items (stop when we get to the one we started from)
-        while ( id != idParent && !GetItemText(id).Lower().StartsWith(prefix) )
+        while ( itemid.IsOk() && itemid != idParent &&
+                    !GetItemText(itemid).Lower().StartsWith(prefix) )
+        {
+            itemid = GetNext(itemid);
+        }
+        // If we haven't found the item but wrapped back to the one we started
+        // from, id.IsOk() must be false
+        if ( itemid == idParent )
         {
-            id = GetNext(id);
+            itemid = wxTreeItemId();
         }
     }
 
-    return id;
+    return itemid;
 }
 
 // -----------------------------------------------------------------------------
@@ -1311,10 +1628,11 @@ wxTreeItemId wxGenericTreeCtrl::FindItem(const wxTreeItemId& idParent,
 // -----------------------------------------------------------------------------
 
 wxTreeItemId wxGenericTreeCtrl::DoInsertItem(const wxTreeItemId& parentId,
-                                      size_t previous,
-                                      const wxString& text,
-                                      int image, int selImage,
-                                      wxTreeItemData *data)
+                                             size_t previous,
+                                             const wxString& text,
+                                             int image,
+                                             int selImage,
+                                             wxTreeItemData *data)
 {
     wxGenericTreeItem *parent = (wxGenericTreeItem*) parentId.m_pItem;
     if ( !parent )
@@ -1323,7 +1641,7 @@ wxTreeItemId wxGenericTreeCtrl::DoInsertItem(const wxTreeItemId& parentId,
         return AddRoot(text, image, selImage, data);
     }
 
-    m_dirty = TRUE;     // do this first so stuff below doesn't cause flicker
+    m_dirty = true;     // do this first so stuff below doesn't cause flicker
 
     wxGenericTreeItem *item =
         new wxGenericTreeItem( parent, text, image, selImage, data );
@@ -1333,20 +1651,23 @@ wxTreeItemId wxGenericTreeCtrl::DoInsertItem(const wxTreeItemId& parentId,
         data->m_pItem = item;
     }
 
-    parent->Insert( item, previous );
+    parent->Insert( item, previous == (size_t)-1 ? parent->GetChildren().size()
+                                                 : previous );
 
+    InvalidateBestSize();
     return item;
 }
 
 wxTreeItemId wxGenericTreeCtrl::AddRoot(const wxString& text,
-                                 int image, int selImage,
-                                 wxTreeItemData *data)
+                                        int image,
+                                        int selImage,
+                                        wxTreeItemData *data)
 {
-    wxCHECK_MSG( !m_anchor, wxTreeItemId(), wxT("tree can have only one root") );
+    wxCHECK_MSG( !m_anchor, wxTreeItemId(), "tree can have only one root" );
 
-    m_dirty = TRUE;     // do this first so stuff below doesn't cause flicker
+    m_dirty = true;     // do this first so stuff below doesn't cause flicker
 
-    m_anchor = new wxGenericTreeItem((wxGenericTreeItem *)NULL, text,
+    m_anchor = new wxGenericTreeItem(NULL, text,
                                    image, selImage, data);
     if ( data != NULL )
     {
@@ -1365,25 +1686,18 @@ wxTreeItemId wxGenericTreeCtrl::AddRoot(const wxString& text,
     if (!HasFlag(wxTR_MULTIPLE))
     {
         m_current = m_key_current = m_anchor;
-        m_current->SetHilight( TRUE );
+        m_current->SetHilight( true );
     }
 
+    InvalidateBestSize();
     return m_anchor;
 }
 
-wxTreeItemId wxGenericTreeCtrl::PrependItem(const wxTreeItemId& parent,
-                                     const wxString& text,
-                                     int image, int selImage,
-                                     wxTreeItemData *data)
-{
-    return DoInsertItem(parent, 0u, text, image, selImage, data);
-}
-
-wxTreeItemId wxGenericTreeCtrl::InsertItem(const wxTreeItemId& parentId,
-                                    const wxTreeItemId& idPrevious,
-                                    const wxString& text,
-                                    int image, int selImage,
-                                    wxTreeItemData *data)
+wxTreeItemId wxGenericTreeCtrl::DoInsertAfter(const wxTreeItemId& parentId,
+                                              const wxTreeItemId& idPrevious,
+                                              const wxString& text,
+                                              int image, int selImage,
+                                              wxTreeItemData *data)
 {
     wxGenericTreeItem *parent = (wxGenericTreeItem*) parentId.m_pItem;
     if ( !parent )
@@ -1395,77 +1709,91 @@ wxTreeItemId wxGenericTreeCtrl::InsertItem(const wxTreeItemId& parentId,
     int index = -1;
     if (idPrevious.IsOk())
     {
-        index = parent->GetChildren().Index((wxGenericTreeItem*) idPrevious.m_pItem);
+        index = parent->GetChildren().Index(
+                    (wxGenericTreeItem*) idPrevious.m_pItem);
         wxASSERT_MSG( index != wxNOT_FOUND,
-                      wxT("previous item in wxGenericTreeCtrl::InsertItem() is not a sibling") );
+                      "previous item in wxGenericTreeCtrl::InsertItem() "
+                      "is not a sibling" );
     }
 
     return DoInsertItem(parentId, (size_t)++index, text, image, selImage, data);
 }
 
-wxTreeItemId wxGenericTreeCtrl::InsertItem(const wxTreeItemId& parentId,
-                                    size_t before,
-                                    const wxString& text,
-                                    int image, int selImage,
-                                    wxTreeItemData *data)
+
+void wxGenericTreeCtrl::SendDeleteEvent(wxGenericTreeItem *item)
 {
-    wxGenericTreeItem *parent = (wxGenericTreeItem*) parentId.m_pItem;
-    if ( !parent )
+    wxTreeEvent event(wxEVT_COMMAND_TREE_DELETE_ITEM, this, item);
+    GetEventHandler()->ProcessEvent( event );
+}
+
+// Don't leave edit or selection on a child which is about to disappear
+void wxGenericTreeCtrl::ChildrenClosing(wxGenericTreeItem* item)
+{
+    if ( m_textCtrl && item != m_textCtrl->item() &&
+            IsDescendantOf(item, m_textCtrl->item()) )
     {
-        // should we give a warning here?
-        return AddRoot(text, image, selImage, data);
+        m_textCtrl->EndEdit( true );
     }
 
-    return DoInsertItem(parentId, before, text, image, selImage, data);
-}
+    if ( item != m_key_current && IsDescendantOf(item, m_key_current) )
+    {
+        m_key_current = NULL;
+    }
 
-wxTreeItemId wxGenericTreeCtrl::AppendItem(const wxTreeItemId& parentId,
-                                    const wxString& text,
-                                    int image, int selImage,
-                                    wxTreeItemData *data)
-{
-    wxGenericTreeItem *parent = (wxGenericTreeItem*) parentId.m_pItem;
-    if ( !parent )
+    if ( IsDescendantOf(item, m_select_me) )
     {
-        // should we give a warning here?
-        return AddRoot(text, image, selImage, data);
+        m_select_me = item;
     }
 
-    return DoInsertItem( parent, parent->GetChildren().Count(), text,
-                         image, selImage, data);
-}
-
-void wxGenericTreeCtrl::SendDeleteEvent(wxGenericTreeItem *item)
-{
-    wxTreeEvent event( wxEVT_COMMAND_TREE_DELETE_ITEM, GetId() );
-    event.m_item = item;
-    event.SetEventObject( this );
-    ProcessEvent( event );
+    if ( item != m_current && IsDescendantOf(item, m_current) )
+    {
+        m_current->SetHilight( false );
+        m_current = NULL;
+        m_select_me = item;
+    }
 }
 
 void wxGenericTreeCtrl::DeleteChildren(const wxTreeItemId& itemId)
 {
-    m_dirty = TRUE;     // do this first so stuff below doesn't cause flicker
+    m_dirty = true;     // do this first so stuff below doesn't cause flicker
 
     wxGenericTreeItem *item = (wxGenericTreeItem*) itemId.m_pItem;
+    ChildrenClosing(item);
     item->DeleteChildren(this);
+    InvalidateBestSize();
 }
 
 void wxGenericTreeCtrl::Delete(const wxTreeItemId& itemId)
 {
-    m_dirty = TRUE;     // do this first so stuff below doesn't cause flicker
+    m_dirty = true;     // do this first so stuff below doesn't cause flicker
 
     wxGenericTreeItem *item = (wxGenericTreeItem*) itemId.m_pItem;
 
+    if (m_textCtrl != NULL && IsDescendantOf(item, m_textCtrl->item()))
+    {
+        // can't delete the item being edited, cancel editing it first
+        m_textCtrl->EndEdit( true );
+    }
+
     wxGenericTreeItem *parent = item->GetParent();
 
+    // if the selected item will be deleted, select the parent ...
+    wxGenericTreeItem *to_be_selected = parent;
+    if (parent)
+    {
+        // .. unless there is a next sibling like wxMSW does it
+        int pos = parent->GetChildren().Index( item );
+        if ((int)(parent->GetChildren().GetCount()) > pos+1)
+            to_be_selected = parent->GetChildren().Item( pos+1 );
+    }
+
     // don't keep stale pointers around!
     if ( IsDescendantOf(item, m_key_current) )
     {
         // Don't silently change the selection:
         // do it properly in idle time, so event
         // handlers get called.
-        
+
         // m_key_current = parent;
         m_key_current = NULL;
     }
@@ -1474,7 +1802,7 @@ void wxGenericTreeCtrl::Delete(const wxTreeItemId& itemId)
     // a different item, in idle time.
     if ( m_select_me && IsDescendantOf(item, m_select_me) )
     {
-        m_select_me = parent;
+        m_select_me = to_be_selected;
     }
 
     if ( IsDescendantOf(item, m_current) )
@@ -1482,10 +1810,10 @@ void wxGenericTreeCtrl::Delete(const wxTreeItemId& itemId)
         // Don't silently change the selection:
         // do it properly in idle time, so event
         // handlers get called.
-        
+
         // m_current = parent;
         m_current = NULL;
-        m_select_me = parent;
+        m_select_me = to_be_selected;
     }
 
     // remove the item from the tree
@@ -1502,7 +1830,13 @@ void wxGenericTreeCtrl::Delete(const wxTreeItemId& itemId)
     // and delete all of its children and the item itself now
     item->DeleteChildren(this);
     SendDeleteEvent(item);
+
+    if (item == m_select_me)
+        m_select_me = NULL;
+
     delete item;
+
+    InvalidateBestSize();
 }
 
 void wxGenericTreeCtrl::DeleteAllItems()
@@ -1517,9 +1851,9 @@ void wxGenericTreeCtrl::Expand(const wxTreeItemId& itemId)
 {
     wxGenericTreeItem *item = (wxGenericTreeItem*) itemId.m_pItem;
 
-    wxCHECK_RET( item, _T("invalid item in wxGenericTreeCtrl::Expand") );
+    wxCHECK_RET( item, wxT("invalid item in wxGenericTreeCtrl::Expand") );
     wxCHECK_RET( !HasFlag(wxTR_HIDE_ROOT) || itemId != GetRootItem(),
-                 _T("can't expand hidden root") );
+                 wxT("can't expand hidden root") );
 
     if ( !item->HasPlus() )
         return;
@@ -1527,68 +1861,53 @@ void wxGenericTreeCtrl::Expand(const wxTreeItemId& itemId)
     if ( item->IsExpanded() )
         return;
 
-    wxTreeEvent event( wxEVT_COMMAND_TREE_ITEM_EXPANDING, GetId() );
-    event.m_item = item;
-    event.SetEventObject( this );
+    wxTreeEvent event(wxEVT_COMMAND_TREE_ITEM_EXPANDING, this, item);
 
-    if ( ProcessEvent( event ) && !event.IsAllowed() )
+    if ( GetEventHandler()->ProcessEvent( event ) && !event.IsAllowed() )
     {
         // cancelled by program
         return;
     }
 
     item->Expand();
-    CalculatePositions();
-
-    RefreshSubtree(item);
-
-    event.SetEventType(wxEVT_COMMAND_TREE_ITEM_EXPANDED);
-    ProcessEvent( event );
-}
-
-void wxGenericTreeCtrl::ExpandAll(const wxTreeItemId& item)
-{
-    if ( !HasFlag(wxTR_HIDE_ROOT) || item != GetRootItem())
+    if ( !IsFrozen() )
     {
-        Expand(item);
-        if ( !IsExpanded(item) )
-            return;
-    }
+        CalculatePositions();
 
-    wxTreeItemIdValue cookie;
-    wxTreeItemId child = GetFirstChild(item, cookie);
-    while ( child.IsOk() )
+        RefreshSubtree(item);
+    }
+    else // frozen
     {
-        ExpandAll(child);
-
-        child = GetNextChild(item, cookie);
+        m_dirty = true;
     }
+
+    event.SetEventType(wxEVT_COMMAND_TREE_ITEM_EXPANDED);
+    GetEventHandler()->ProcessEvent( event );
 }
 
 void wxGenericTreeCtrl::Collapse(const wxTreeItemId& itemId)
 {
     wxCHECK_RET( !HasFlag(wxTR_HIDE_ROOT) || itemId != GetRootItem(),
-                 _T("can't collapse hidden root") );
+                 wxT("can't collapse hidden root") );
 
     wxGenericTreeItem *item = (wxGenericTreeItem*) itemId.m_pItem;
 
     if ( !item->IsExpanded() )
         return;
 
-    wxTreeEvent event( wxEVT_COMMAND_TREE_ITEM_COLLAPSING, GetId() );
-    event.m_item = item;
-    event.SetEventObject( this );
-    if ( ProcessEvent( event ) && !event.IsAllowed() )
+    wxTreeEvent event(wxEVT_COMMAND_TREE_ITEM_COLLAPSING, this, item);
+    if ( GetEventHandler()->ProcessEvent( event ) && !event.IsAllowed() )
     {
         // cancelled by program
         return;
     }
 
+    ChildrenClosing(item);
     item->Collapse();
 
 #if 0  // TODO why should items be collapsed recursively?
     wxArrayGenericTreeItems& children = item->GetChildren();
-    size_t count = children.Count();
+    size_t count = children.GetCount();
     for ( size_t n = 0; n < count; n++ )
     {
         Collapse(children[n]);
@@ -1600,7 +1919,7 @@ void wxGenericTreeCtrl::Collapse(const wxTreeItemId& itemId)
     RefreshSubtree(item);
 
     event.SetEventType(wxEVT_COMMAND_TREE_ITEM_COLLAPSED);
-    ProcessEvent( event );
+    GetEventHandler()->ProcessEvent( event );
 }
 
 void wxGenericTreeCtrl::CollapseAndReset(const wxTreeItemId& item)
@@ -1623,7 +1942,7 @@ void wxGenericTreeCtrl::Unselect()
 {
     if (m_current)
     {
-        m_current->SetHilight( FALSE );
+        m_current->SetHilight( false );
         RefreshLine( m_current );
 
         m_current = NULL;
@@ -1631,18 +1950,32 @@ void wxGenericTreeCtrl::Unselect()
     }
 }
 
+void wxGenericTreeCtrl::ClearFocusedItem()
+{
+    wxTreeItemId item = GetFocusedItem();
+    if ( item.IsOk() )
+        SelectItem(item, false);
+}
+
+void wxGenericTreeCtrl::SetFocusedItem(const wxTreeItemId& item)
+{
+    wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
+
+    SelectItem(item, true);
+}
+
 void wxGenericTreeCtrl::UnselectAllChildren(wxGenericTreeItem *item)
 {
     if (item->IsSelected())
     {
-        item->SetHilight(FALSE);
+        item->SetHilight(false);
         RefreshLine(item);
     }
 
     if (item->HasChildren())
     {
         wxArrayGenericTreeItems& children = item->GetChildren();
-        size_t count = children.Count();
+        size_t count = children.GetCount();
         for ( size_t n = 0; n < count; ++n )
         {
             UnselectAllChildren(children[n]);
@@ -1661,13 +1994,52 @@ void wxGenericTreeCtrl::UnselectAll()
     }
 }
 
+void wxGenericTreeCtrl::SelectChildren(const wxTreeItemId& parent)
+{
+    wxCHECK_RET( HasFlag(wxTR_MULTIPLE),
+                 "this only works with multiple selection controls" );
+
+    UnselectAll();
+
+    if ( !HasChildren(parent) )
+        return;
+
+
+    wxArrayGenericTreeItems&
+        children = ((wxGenericTreeItem*) parent.m_pItem)->GetChildren();
+    size_t count = children.GetCount();
+
+    wxGenericTreeItem *
+        item = (wxGenericTreeItem*) ((wxTreeItemId)children[0]).m_pItem;
+    wxTreeEvent event(wxEVT_COMMAND_TREE_SEL_CHANGING, this, item);
+    event.m_itemOld = m_current;
+
+    if ( GetEventHandler()->ProcessEvent( event ) && !event.IsAllowed() )
+        return;
+
+    for ( size_t n = 0; n < count; ++n )
+    {
+        m_current = m_key_current = children[n];
+        m_current->SetHilight(true);
+        RefreshSelected();
+    }
+
+
+    event.SetEventType(wxEVT_COMMAND_TREE_SEL_CHANGED);
+    GetEventHandler()->ProcessEvent( event );
+}
+
+
 // Recursive function !
 // To stop we must have crt_item<last_item
 // Algorithm :
 // Tag all next children, when no more children,
 // Move to parent (not to tag)
 // Keep going... if we found last_item, we stop.
-bool wxGenericTreeCtrl::TagNextChildren(wxGenericTreeItem *crt_item, wxGenericTreeItem *last_item, bool select)
+bool
+wxGenericTreeCtrl::TagNextChildren(wxGenericTreeItem *crt_item,
+                                   wxGenericTreeItem *last_item,
+                                   bool select)
 {
     wxGenericTreeItem *parent = crt_item->GetParent();
 
@@ -1678,54 +2050,52 @@ bool wxGenericTreeCtrl::TagNextChildren(wxGenericTreeItem *crt_item, wxGenericTr
     int index = children.Index(crt_item);
     wxASSERT( index != wxNOT_FOUND ); // I'm not a child of my parent?
 
-    size_t count = children.Count();
+    size_t count = children.GetCount();
     for (size_t n=(size_t)(index+1); n<count; ++n)
     {
-        if (TagAllChildrenUntilLast(children[n], last_item, select)) return TRUE;
+        if ( TagAllChildrenUntilLast(children[n], last_item, select) )
+            return true;
     }
 
     return TagNextChildren(parent, last_item, select);
 }
 
-bool wxGenericTreeCtrl::TagAllChildrenUntilLast(wxGenericTreeItem *crt_item, wxGenericTreeItem *last_item, bool select)
+bool
+wxGenericTreeCtrl::TagAllChildrenUntilLast(wxGenericTreeItem *crt_item,
+                                           wxGenericTreeItem *last_item,
+                                           bool select)
 {
     crt_item->SetHilight(select);
     RefreshLine(crt_item);
 
     if (crt_item==last_item)
-        return TRUE;
+        return true;
 
-    if (crt_item->HasChildren())
+    // We should leave the not shown children of collapsed items alone.
+    if (crt_item->HasChildren() && crt_item->IsExpanded())
     {
         wxArrayGenericTreeItems& children = crt_item->GetChildren();
-        size_t count = children.Count();
+        size_t count = children.GetCount();
         for ( size_t n = 0; n < count; ++n )
         {
             if (TagAllChildrenUntilLast(children[n], last_item, select))
-                return TRUE;
+                return true;
         }
     }
 
-  return FALSE;
+  return false;
 }
 
-void wxGenericTreeCtrl::SelectItemRange(wxGenericTreeItem *item1, wxGenericTreeItem *item2)
+void
+wxGenericTreeCtrl::SelectItemRange(wxGenericTreeItem *item1,
+                                   wxGenericTreeItem *item2)
 {
-    // item2 is not necessary after item1
-    wxGenericTreeItem *first=NULL, *last=NULL;
     m_select_me = NULL;
 
+    // item2 is not necessary after item1
     // choice first' and 'last' between item1 and item2
-    if (item1->GetY()<item2->GetY())
-    {
-        first=item1;
-        last=item2;
-    }
-    else
-    {
-        first=item2;
-        last=item1;
-    }
+    wxGenericTreeItem *first= (item1->GetY()<item2->GetY()) ? item1 : item2;
+    wxGenericTreeItem *last = (item1->GetY()<item2->GetY()) ? item2 : item1;
 
     bool select = m_current->IsSelected();
 
@@ -1735,14 +2105,14 @@ void wxGenericTreeCtrl::SelectItemRange(wxGenericTreeItem *item1, wxGenericTreeI
     TagNextChildren(first,last,select);
 }
 
-void wxGenericTreeCtrl::SelectItem(const wxTreeItemId& itemId,
-                                   bool unselect_others,
-                                   bool extended_select)
+void wxGenericTreeCtrl::DoSelectItem(const wxTreeItemId& itemId,
+                                     bool unselect_others,
+                                     bool extended_select)
 {
     wxCHECK_RET( itemId.IsOk(), wxT("invalid tree item") );
 
     m_select_me = NULL;
-    
+
     bool is_single=!(GetWindowStyleFlag() & wxTR_MULTIPLE);
     wxGenericTreeItem *item = (wxGenericTreeItem*) itemId.m_pItem;
 
@@ -1754,8 +2124,8 @@ void wxGenericTreeCtrl::SelectItem(const wxTreeItemId& itemId,
     {
         if (item->IsSelected())
             return; // nothing to do
-        unselect_others = TRUE;
-        extended_select = FALSE;
+        unselect_others = true;
+        extended_select = false;
     }
     else if ( unselect_others && item->IsSelected() )
     {
@@ -1765,10 +2135,8 @@ void wxGenericTreeCtrl::SelectItem(const wxTreeItemId& itemId,
             return;
     }
 
-    wxTreeEvent event( wxEVT_COMMAND_TREE_SEL_CHANGING, GetId() );
-    event.m_item = item;
+    wxTreeEvent event(wxEVT_COMMAND_TREE_SEL_CHANGING, this, item);
     event.m_itemOld = m_current;
-    event.SetEventObject( this );
     // TODO : Here we don't send any selection mode yet !
 
     if ( GetEventHandler()->ProcessEvent( event ) && !event.IsAllowed() )
@@ -1783,8 +2151,6 @@ void wxGenericTreeCtrl::SelectItem(const wxTreeItemId& itemId,
         parent = GetItemParent( parent );
     }
 
-    EnsureVisible( itemId );
-
     // ctrl press
     if (unselect_others)
     {
@@ -1797,7 +2163,8 @@ void wxGenericTreeCtrl::SelectItem(const wxTreeItemId& itemId,
     {
         if ( !m_current )
         {
-            m_current = m_key_current = (wxGenericTreeItem*) GetRootItem().m_pItem;
+            m_current =
+            m_key_current = (wxGenericTreeItem*) GetRootItem().m_pItem;
         }
 
         // don't change the mark (m_current)
@@ -1805,7 +2172,7 @@ void wxGenericTreeCtrl::SelectItem(const wxTreeItemId& itemId,
     }
     else
     {
-        bool select=TRUE; // the default
+        bool select = true; // the default
 
         // Check if we need to toggle hilight (ctrl mode)
         if (!unselect_others)
@@ -1816,10 +2183,39 @@ void wxGenericTreeCtrl::SelectItem(const wxTreeItemId& itemId,
         RefreshLine( m_current );
     }
 
+    // This can cause idle processing to select the root
+    // if no item is selected, so it must be after the
+    // selection is set
+    EnsureVisible( itemId );
+
     event.SetEventType(wxEVT_COMMAND_TREE_SEL_CHANGED);
     GetEventHandler()->ProcessEvent( event );
 }
 
+void wxGenericTreeCtrl::SelectItem(const wxTreeItemId& itemId, bool select)
+{
+    wxGenericTreeItem * const item = (wxGenericTreeItem*) itemId.m_pItem;
+    wxCHECK_RET( item, wxT("SelectItem(): invalid tree item") );
+
+    if ( select )
+    {
+        if ( !item->IsSelected() )
+            DoSelectItem(itemId, !HasFlag(wxTR_MULTIPLE));
+    }
+    else // deselect
+    {
+        wxTreeEvent event(wxEVT_COMMAND_TREE_SEL_CHANGING, this, item);
+        if ( GetEventHandler()->ProcessEvent( event ) && !event.IsAllowed() )
+            return;
+
+        item->SetHilight(false);
+        RefreshLine(item);
+
+        event.SetEventType(wxEVT_COMMAND_TREE_SEL_CHANGED);
+        GetEventHandler()->ProcessEvent( event );
+    }
+}
+
 void wxGenericTreeCtrl::FillArray(wxGenericTreeItem *item,
                                   wxArrayTreeItemIds &array) const
 {
@@ -1845,11 +2241,13 @@ size_t wxGenericTreeCtrl::GetSelections(wxArrayTreeItemIds &array) const
     }
     //else: the tree is empty, so no selections
 
-    return array.Count();
+    return array.GetCount();
 }
 
 void wxGenericTreeCtrl::EnsureVisible(const wxTreeItemId& item)
 {
+    wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
+
     if (!item.IsOk()) return;
 
     wxGenericTreeItem *gitem = (wxGenericTreeItem*) item.m_pItem;
@@ -1881,52 +2279,53 @@ void wxGenericTreeCtrl::EnsureVisible(const wxTreeItemId& item)
 
 void wxGenericTreeCtrl::ScrollTo(const wxTreeItemId &item)
 {
-    if (!item.IsOk()) return;
-
-    // We have to call this here because the label in
-    // question might just have been added and no screen
-    // update taken place.
-    if (m_dirty) wxYieldIfNeeded();
+    if (!item.IsOk())
+        return;
 
+    // update the control before scrolling it
+    if (m_dirty)
+    {
+#if defined( __WXMSW__ ) 
+        Update();
+#elif defined(__WXMAC__)
+        Update();
+        DoDirtyProcessing();
+#else
+        DoDirtyProcessing();
+#endif
+    }
+        
     wxGenericTreeItem *gitem = (wxGenericTreeItem*) item.m_pItem;
 
-    // now scroll to the item
-    int item_y = gitem->GetY();
+    int itemY = gitem->GetY();
 
     int start_x = 0;
     int start_y = 0;
     GetViewStart( &start_x, &start_y );
-    start_y *= PIXELS_PER_UNIT;
 
-    int client_h = 0;
-    int client_w = 0;
-    GetClientSize( &client_w, &client_h );
+    const int clientHeight = GetClientSize().y;
 
-    if (item_y < start_y+3)
+    const int itemHeight = GetLineHeight(gitem) + 2;
+
+    if ( itemY + itemHeight > start_y*PIXELS_PER_UNIT + clientHeight )
     {
-        // going down
-        int x = 0;
-        int y = 0;
-        m_anchor->GetSize( x, y, this );
-        y += PIXELS_PER_UNIT+2; // one more scrollbar unit + 2 pixels
-        x += PIXELS_PER_UNIT+2; // one more scrollbar unit + 2 pixels
-        int x_pos = GetScrollPos( wxHORIZONTAL );
-        // Item should appear at top
-        SetScrollbars( PIXELS_PER_UNIT, PIXELS_PER_UNIT, x/PIXELS_PER_UNIT, y/PIXELS_PER_UNIT, x_pos, item_y/PIXELS_PER_UNIT );
+        // need to scroll up by enough to show this item fully
+        itemY += itemHeight - clientHeight;
+#ifdef __WXOSX__
+        // because itemY below will be divided by PIXELS_PER_UNIT it may
+        // be rounded down, with the result of the item still only being 
+        // partially visible, so make sure we are rounding up
+        itemY += PIXELS_PER_UNIT-1;
+#endif
     }
-    else if (item_y+GetLineHeight(gitem) > start_y+client_h)
+    else if ( itemY > start_y*PIXELS_PER_UNIT )
     {
-        // going up
-        int x = 0;
-        int y = 0;
-        m_anchor->GetSize( x, y, this );
-        y += PIXELS_PER_UNIT+2; // one more scrollbar unit + 2 pixels
-        x += PIXELS_PER_UNIT+2; // one more scrollbar unit + 2 pixels
-        item_y += PIXELS_PER_UNIT+2;
-        int x_pos = GetScrollPos( wxHORIZONTAL );
-        // Item should appear at bottom
-        SetScrollbars( PIXELS_PER_UNIT, PIXELS_PER_UNIT, x/PIXELS_PER_UNIT, y/PIXELS_PER_UNIT, x_pos, (item_y+GetLineHeight(gitem)-client_h)/PIXELS_PER_UNIT );
+        // item is already fully visible, don't do anything
+        return;
     }
+    //else: scroll down to make this item the top one displayed
+
+    Scroll(-1, itemY/PIXELS_PER_UNIT);
 }
 
 // FIXME: tree sorting functions are not reentrant and not MT-safe!
@@ -1935,17 +2334,12 @@ static wxGenericTreeCtrl *s_treeBeingSorted = NULL;
 static int LINKAGEMODE tree_ctrl_compare_func(wxGenericTreeItem **item1,
                                   wxGenericTreeItem **item2)
 {
-    wxCHECK_MSG( s_treeBeingSorted, 0, wxT("bug in wxGenericTreeCtrl::SortChildren()") );
+    wxCHECK_MSG( s_treeBeingSorted, 0,
+                 "bug in wxGenericTreeCtrl::SortChildren()" );
 
     return s_treeBeingSorted->OnCompareItems(*item1, *item2);
 }
 
-int wxGenericTreeCtrl::OnCompareItems(const wxTreeItemId& item1,
-                               const wxTreeItemId& item2)
-{
-    return wxStrcmp(GetItemText(item1), GetItemText(item2));
-}
-
 void wxGenericTreeCtrl::SortChildren(const wxTreeItemId& itemId)
 {
     wxCHECK_RET( itemId.IsOk(), wxT("invalid tree item") );
@@ -1956,9 +2350,9 @@ void wxGenericTreeCtrl::SortChildren(const wxTreeItemId& itemId)
                  wxT("wxGenericTreeCtrl::SortChildren is not reentrant") );
 
     wxArrayGenericTreeItems& children = item->GetChildren();
-    if ( children.Count() > 1 )
+    if ( children.GetCount() > 1 )
     {
-        m_dirty = TRUE;
+        m_dirty = true;
 
         s_treeBeingSorted = this;
         children.Sort(tree_ctrl_compare_func);
@@ -1967,21 +2361,6 @@ void wxGenericTreeCtrl::SortChildren(const wxTreeItemId& itemId)
     //else: don't make the tree dirty as nothing changed
 }
 
-wxImageList *wxGenericTreeCtrl::GetImageList() const
-{
-    return m_imageListNormal;
-}
-
-wxImageList *wxGenericTreeCtrl::GetButtonsImageList() const
-{
-    return m_imageListButtons;
-}
-
-wxImageList *wxGenericTreeCtrl::GetStateImageList() const
-{
-    return m_imageListState;
-}
-
 void wxGenericTreeCtrl::CalculateLineHeight()
 {
     wxClientDC dc(this);
@@ -2001,6 +2380,20 @@ void wxGenericTreeCtrl::CalculateLineHeight()
         }
     }
 
+    if ( m_imageListState )
+    {
+        // Calculate a m_lineHeight value from the state Image sizes.
+        // May be toggle off. Then wxGenericTreeCtrl will spread when
+        // necessary (which might look ugly).
+        int n = m_imageListState->GetImageCount();
+        for (int i = 0; i < n ; i++)
+        {
+            int width = 0, height = 0;
+            m_imageListState->GetSize(i, width, height);
+            if (height > m_lineHeight) m_lineHeight = height;
+        }
+    }
+
     if (m_imageListButtons)
     {
         // Calculate a m_lineHeight value from the Button image sizes.
@@ -2025,8 +2418,12 @@ void wxGenericTreeCtrl::SetImageList(wxImageList *imageList)
 {
     if (m_ownsImageListNormal) delete m_imageListNormal;
     m_imageListNormal = imageList;
-    m_ownsImageListNormal = FALSE;
-    m_dirty = TRUE;
+    m_ownsImageListNormal = false;
+    m_dirty = true;
+
+    if (m_anchor)
+        m_anchor->RecursiveResetSize();
+
     // Don't do any drawing if we're setting the list to NULL,
     // since we may be in the process of deleting the tree control.
     if (imageList)
@@ -2037,34 +2434,35 @@ void wxGenericTreeCtrl::SetStateImageList(wxImageList *imageList)
 {
     if (m_ownsImageListState) delete m_imageListState;
     m_imageListState = imageList;
-    m_ownsImageListState = FALSE;
+    m_ownsImageListState = false;
+    m_dirty = true;
+
+    if (m_anchor)
+        m_anchor->RecursiveResetSize();
+
+    // Don't do any drawing if we're setting the list to NULL,
+    // since we may be in the process of deleting the tree control.
+    if (imageList)
+        CalculateLineHeight();
 }
 
 void wxGenericTreeCtrl::SetButtonsImageList(wxImageList *imageList)
 {
     if (m_ownsImageListButtons) delete m_imageListButtons;
     m_imageListButtons = imageList;
-    m_ownsImageListButtons = FALSE;
-    m_dirty = TRUE;
-    CalculateLineHeight();
-}
+    m_ownsImageListButtons = false;
+    m_dirty = true;
 
-void wxGenericTreeCtrl::AssignImageList(wxImageList *imageList)
-{
-    SetImageList(imageList);
-    m_ownsImageListNormal = TRUE;
-}
+    if (m_anchor)
+        m_anchor->RecursiveResetSize();
 
-void wxGenericTreeCtrl::AssignStateImageList(wxImageList *imageList)
-{
-    SetStateImageList(imageList);
-    m_ownsImageListState = TRUE;
+    CalculateLineHeight();
 }
 
 void wxGenericTreeCtrl::AssignButtonsImageList(wxImageList *imageList)
 {
     SetButtonsImageList(imageList);
-    m_ownsImageListButtons = TRUE;
+    m_ownsImageListButtons = true;
 }
 
 // -----------------------------------------------------------------------------
@@ -2081,7 +2479,9 @@ void wxGenericTreeCtrl::AdjustMyScrollbars()
         x += PIXELS_PER_UNIT+2; // one more scrollbar unit + 2 pixels
         int x_pos = GetScrollPos( wxHORIZONTAL );
         int y_pos = GetScrollPos( wxVERTICAL );
-        SetScrollbars( PIXELS_PER_UNIT, PIXELS_PER_UNIT, x/PIXELS_PER_UNIT, y/PIXELS_PER_UNIT, x_pos, y_pos );
+        SetScrollbars( PIXELS_PER_UNIT, PIXELS_PER_UNIT,
+                       x/PIXELS_PER_UNIT, y/PIXELS_PER_UNIT,
+                       x_pos, y_pos );
     }
     else
     {
@@ -2099,16 +2499,10 @@ int wxGenericTreeCtrl::GetLineHeight(wxGenericTreeItem *item) const
 
 void wxGenericTreeCtrl::PaintItem(wxGenericTreeItem *item, wxDC& dc)
 {
-    // TODO implement "state" icon on items
-
-    wxTreeItemAttr *attr = item->GetAttributes();
-    if ( attr && attr->HasFont() )
-        dc.SetFont(attr->GetFont());
-    else if (item->IsBold())
-        dc.SetFont(m_boldFont);
+    item->SetFont(this, dc);
+    item->CalculateSize(this, dc);
 
-    long text_w = 0, text_h = 0;
-    dc.GetTextExtent( item->GetText(), &text_w, &text_h );
+    wxCoord text_h = item->GetTextHeight();
 
     int image_h = 0, image_w = 0;
     int image = item->GetCurrentImage();
@@ -2116,8 +2510,8 @@ void wxGenericTreeCtrl::PaintItem(wxGenericTreeItem *item, wxDC& dc)
     {
         if ( m_imageListNormal )
         {
-            m_imageListNormal->GetSize( image, image_w, image_h );
-            image_w += 4;
+            m_imageListNormal->GetSize(image, image_w, image_h);
+            image_w += MARGIN_BETWEEN_IMAGE_AND_TEXT;
         }
         else
         {
@@ -2125,84 +2519,208 @@ void wxGenericTreeCtrl::PaintItem(wxGenericTreeItem *item, wxDC& dc)
         }
     }
 
-    int total_h = GetLineHeight(item);
-
-    if ( item->IsSelected() )
+    int state_h = 0, state_w = 0;
+    int state = item->GetState();
+    if ( state != wxTREE_ITEMSTATE_NONE )
     {
-// under mac selections are only a rectangle in case they don't have the focus
-#ifdef __WXMAC__
-        if ( !m_hasFocus )
+        if ( m_imageListState )
         {
-            dc.SetBrush( *wxTRANSPARENT_BRUSH ) ;
-            dc.SetPen( wxPen( wxSystemSettings::GetColour( wxSYS_COLOUR_HIGHLIGHT ) , 1 , wxSOLID ) ) ;
+            m_imageListState->GetSize(state, state_w, state_h);
+            if ( image_w != 0 )
+                state_w += MARGIN_BETWEEN_STATE_AND_IMAGE;
+            else
+                state_w += MARGIN_BETWEEN_IMAGE_AND_TEXT;
         }
         else
         {
-            dc.SetBrush( *m_hilightBrush ) ;
+            state = wxTREE_ITEMSTATE_NONE;
         }
-#else
+    }
+
+    int total_h = GetLineHeight(item);
+    bool drawItemBackground = false,
+         hasBgColour = false;
+
+    if ( item->IsSelected() )
+    {
         dc.SetBrush(*(m_hasFocus ? m_hilightBrush : m_hilightUnfocusedBrush));
-#endif
+        drawItemBackground = true;
     }
     else
     {
         wxColour colBg;
+        wxTreeItemAttr * const attr = item->GetAttributes();
         if ( attr && attr->HasBackgroundColour() )
+        {
+            drawItemBackground =
+            hasBgColour = true;
             colBg = attr->GetBackgroundColour();
+        }
         else
-            colBg = m_backgroundColour;
-        dc.SetBrush(wxBrush(colBg, wxSOLID));
+        {
+            colBg = GetBackgroundColour();
+        }
+        dc.SetBrush(wxBrush(colBg, wxBRUSHSTYLE_SOLID));
     }
 
     int offset = HasFlag(wxTR_ROW_LINES) ? 1 : 0;
 
     if ( HasFlag(wxTR_FULL_ROW_HIGHLIGHT) )
     {
-        int x, y, w, h;
+        int x, w, h;
+        x=0;
+        GetVirtualSize(&w, &h);
+        wxRect rect( x, item->GetY()+offset, w, total_h-offset);
+        if (!item->IsSelected())
+        {
+            dc.DrawRectangle(rect);
+        }
+        else
+        {
+            int flags = wxCONTROL_SELECTED;
+            if (m_hasFocus
+#if defined( __WXMAC__ ) && !defined(__WXUNIVERSAL__) && wxOSX_USE_CARBON // TODO CS
+                && IsControlActive( (ControlRef)GetHandle() )
+#endif
+            )
+                flags |= wxCONTROL_FOCUSED;
+            if ((item == m_current) && (m_hasFocus))
+                flags |= wxCONTROL_CURRENT;
 
-        DoGetPosition(&x, &y);
-        DoGetSize(&w, &h);
-        dc.DrawRectangle(x, item->GetY()+offset, w, total_h-offset);
+            wxRendererNative::Get().
+                DrawItemSelectionRect(this, dc, rect, flags);
+        }
     }
-    else
+    else // no full row highlight
     {
-        if ( item->IsSelected() && image != NO_IMAGE )
+        if ( item->IsSelected() &&
+                (state != wxTREE_ITEMSTATE_NONE || image != NO_IMAGE) )
         {
-            // If it's selected, and there's an image, then we should
-            // take care to leave the area under the image painted in the
-            // background colour.
-            dc.DrawRectangle( item->GetX() + image_w - 2, item->GetY()+offset,
-                              item->GetWidth() - image_w + 2, total_h-offset );
+            // If it's selected, and there's an state image or normal image,
+            // then we should take care to leave the area under the image
+            // painted in the background colour.
+            wxRect rect( item->GetX() + state_w + image_w - 2,
+                         item->GetY() + offset,
+                         item->GetWidth() - state_w - image_w + 2,
+                         total_h - offset );
+#if !defined(__WXGTK20__) && !defined(__WXMAC__)
+            dc.DrawRectangle( rect );
+#else
+            rect.x -= 1;
+            rect.width += 2;
+
+            int flags = wxCONTROL_SELECTED;
+            if (m_hasFocus)
+                flags |= wxCONTROL_FOCUSED;
+            if ((item == m_current) && (m_hasFocus))
+                flags |= wxCONTROL_CURRENT;
+            wxRendererNative::Get().
+                DrawItemSelectionRect(this, dc, rect, flags);
+#endif
         }
-        else
+        // On GTK+ 2, drawing a 'normal' background is wrong for themes that
+        // don't allow backgrounds to be customized. Not drawing the background,
+        // except for custom item backgrounds, works for both kinds of theme.
+        else if (drawItemBackground)
         {
-            dc.DrawRectangle( item->GetX()-2, item->GetY()+offset,
-                              item->GetWidth()+2, total_h-offset );
+            wxRect rect( item->GetX() + state_w + image_w - 2,
+                         item->GetY() + offset,
+                         item->GetWidth() - state_w - image_w + 2,
+                         total_h - offset );
+            if ( hasBgColour )
+            {
+                dc.DrawRectangle( rect );
+            }
+            else // no specific background colour
+            {
+                rect.x -= 1;
+                rect.width += 2;
+
+                int flags = wxCONTROL_SELECTED;
+                if (m_hasFocus)
+                    flags |= wxCONTROL_FOCUSED;
+                if ((item == m_current) && (m_hasFocus))
+                    flags |= wxCONTROL_CURRENT;
+                wxRendererNative::Get().
+                    DrawItemSelectionRect(this, dc, rect, flags);
+            }
         }
     }
 
+    if ( state != wxTREE_ITEMSTATE_NONE )
+    {
+        dc.SetClippingRegion( item->GetX(), item->GetY(), state_w, total_h );
+        m_imageListState->Draw( state, dc,
+                                item->GetX(),
+                                item->GetY() +
+                                    (total_h > state_h ? (total_h-state_h)/2
+                                                       : 0),
+                                wxIMAGELIST_DRAW_TRANSPARENT );
+        dc.DestroyClippingRegion();
+    }
+
     if ( image != NO_IMAGE )
     {
-        dc.SetClippingRegion( item->GetX(), item->GetY(), image_w-2, total_h );
+        dc.SetClippingRegion(item->GetX() + state_w, item->GetY(),
+                             image_w, total_h);
         m_imageListNormal->Draw( image, dc,
-                                 item->GetX(),
-                                 item->GetY() +((total_h > image_h)?((total_h-image_h)/2):0),
+                                 item->GetX() + state_w,
+                                 item->GetY() +
+                                    (total_h > image_h ? (total_h-image_h)/2
+                                                       : 0),
                                  wxIMAGELIST_DRAW_TRANSPARENT );
         dc.DestroyClippingRegion();
     }
 
-    dc.SetBackgroundMode(wxTRANSPARENT);
+    dc.SetBackgroundMode(wxBRUSHSTYLE_TRANSPARENT);
     int extraH = (total_h > text_h) ? (total_h - text_h)/2 : 0;
     dc.DrawText( item->GetText(),
-                 (wxCoord)(image_w + item->GetX()),
+                 (wxCoord)(state_w + image_w + item->GetX()),
                  (wxCoord)(item->GetY() + extraH));
 
     // restore normal font
     dc.SetFont( m_normalFont );
+
+    if (item == m_dndEffectItem)
+    {
+        dc.SetPen( *wxBLACK_PEN );
+        // DnD visual effects
+        switch (m_dndEffect)
+        {
+            case BorderEffect:
+            {
+                dc.SetBrush(*wxTRANSPARENT_BRUSH);
+                int w = item->GetWidth() + 2;
+                int h = total_h + 2;
+                dc.DrawRectangle( item->GetX() - 1, item->GetY() - 1, w, h);
+                break;
+            }
+            case AboveEffect:
+            {
+                int x = item->GetX(),
+                    y = item->GetY();
+                dc.DrawLine( x, y, x + item->GetWidth(), y);
+                break;
+            }
+            case BelowEffect:
+            {
+                int x = item->GetX(),
+                    y = item->GetY();
+                y += total_h - 1;
+                dc.DrawLine( x, y, x + item->GetWidth(), y);
+                break;
+            }
+            case NoEffect:
+                break;
+        }
+    }
 }
 
-// Now y stands for the top of the item, whereas it used to stand for middle !
-void wxGenericTreeCtrl::PaintLevel( wxGenericTreeItem *item, wxDC &dc, int level, int &y )
+void
+wxGenericTreeCtrl::PaintLevel(wxGenericTreeItem *item,
+                              wxDC &dc,
+                              int level,
+                              int &y)
 {
     int x = level*m_indent;
     if (!HasFlag(wxTR_HIDE_ROOT))
@@ -2214,7 +2732,7 @@ void wxGenericTreeCtrl::PaintLevel( wxGenericTreeItem *item, wxDC &dc, int level
         // always expand hidden root
         int origY = y;
         wxArrayGenericTreeItems& children = item->GetChildren();
-        int count = children.Count();
+        int count = children.GetCount();
         if (count > 0)
         {
             int n = 0, oldY;
@@ -2223,7 +2741,8 @@ void wxGenericTreeCtrl::PaintLevel( wxGenericTreeItem *item, wxDC &dc, int level
                 PaintLevel(children[n], dc, 1, y);
             } while (++n < count);
 
-            if (!HasFlag(wxTR_NO_LINES) && HasFlag(wxTR_LINES_AT_ROOT) && count > 0)
+            if ( !HasFlag(wxTR_NO_LINES) && HasFlag(wxTR_LINES_AT_ROOT)
+                    && count > 0 )
             {
                 // draw line down to last child
                 origY += GetLineHeight(children[0])>>1;
@@ -2247,7 +2766,7 @@ void wxGenericTreeCtrl::PaintLevel( wxGenericTreeItem *item, wxDC &dc, int level
 
     if (IsExposed(exposed_x, exposed_y, 10000, h))  // 10000 = very much
     {
-        wxPen *pen =
+        const wxPen *pen =
 #ifndef __WXMAC__
             // don't draw rect outline if we already have the
             // background color under Mac
@@ -2256,9 +2775,24 @@ void wxGenericTreeCtrl::PaintLevel( wxGenericTreeItem *item, wxDC &dc, int level
             wxTRANSPARENT_PEN;
 
         wxColour colText;
-        if ( item->IsSelected() )
+        if ( item->IsSelected()
+#if defined( __WXMAC__ ) && !defined(__WXUNIVERSAL__) && wxOSX_USE_CARBON // TODO CS
+            // On wxMac, if the tree doesn't have the focus we draw an empty
+            // rectangle, so we want to make sure that the text is visible
+            // against the normal background, not the highlightbackground, so
+            // don't use the highlight text colour unless we have the focus.
+             && m_hasFocus && IsControlActive( (ControlRef)GetHandle() )
+#endif
+            )
         {
-            colText = wxSystemSettings::GetColour(wxSYS_COLOUR_HIGHLIGHTTEXT);
+#ifdef __WXMAC__
+            colText = *wxWHITE;
+#else
+            if (m_hasFocus)
+                colText = wxSystemSettings::GetColour(wxSYS_COLOUR_HIGHLIGHTTEXT);
+            else
+                colText = wxSystemSettings::GetColour(wxSYS_COLOUR_LISTBOXHIGHLIGHTTEXT);
+#endif
         }
         else
         {
@@ -2328,6 +2862,12 @@ void wxGenericTreeCtrl::PaintLevel( wxGenericTreeItem *item, wxDC &dc, int level
                 static const int wImage = 9;
                 static const int hImage = 9;
 
+                int flag = 0;
+                if (item->IsExpanded())
+                    flag |= wxCONTROL_EXPANDED;
+                if (item == m_underMouse)
+                    flag |= wxCONTROL_CURRENT;
+
                 wxRendererNative::Get().DrawTreeItemButton
                                         (
                                             this,
@@ -2335,9 +2875,7 @@ void wxGenericTreeCtrl::PaintLevel( wxGenericTreeItem *item, wxDC &dc, int level
                                             wxRect(x - wImage/2,
                                                    y_mid - hImage/2,
                                                    wImage, hImage),
-                                            item->IsExpanded()
-                                                ? wxCONTROL_EXPANDED
-                                                : 0
+                                            flag
                                         );
             }
         }
@@ -2346,7 +2884,7 @@ void wxGenericTreeCtrl::PaintLevel( wxGenericTreeItem *item, wxDC &dc, int level
     if (item->IsExpanded())
     {
         wxArrayGenericTreeItems& children = item->GetChildren();
-        int count = children.Count();
+        int count = children.GetCount();
         if (count > 0)
         {
             int n = 0, oldY;
@@ -2362,20 +2900,21 @@ void wxGenericTreeCtrl::PaintLevel( wxGenericTreeItem *item, wxDC &dc, int level
                 oldY += GetLineHeight(children[n-1])>>1;
                 if (HasButtons()) y_mid += 5;
 
-                // Only draw the portion of the line that is visible, in case it is huge
-                wxCoord        xOrigin=0, yOrigin=0, width, height;
+                // Only draw the portion of the line that is visible, in case
+                // it is huge
+                wxCoord xOrigin=0, yOrigin=0, width, height;
                 dc.GetDeviceOrigin(&xOrigin, &yOrigin);
                 yOrigin = abs(yOrigin);
                 GetClientSize(&width, &height);
 
-                // Move end points to the begining/end of the view?
+                // Move end points to the beginning/end of the view?
                 if (y_mid < yOrigin)
                     y_mid = yOrigin;
                 if (oldY > yOrigin + height)
                     oldY = yOrigin + height;
 
-                // after the adjustments if y_mid is larger than oldY then the line
-                // isn't visible at all so don't draw anything
+                // after the adjustments if y_mid is larger than oldY then the
+                // line isn't visible at all so don't draw anything
                 if (y_mid < oldY)
                     dc.DrawLine(x, y_mid, x, oldY);
             }
@@ -2396,10 +2935,10 @@ void wxGenericTreeCtrl::DrawDropEffect(wxGenericTreeItem *item)
         {
             // draw a line under the drop target because the item will be
             // dropped there
-            DrawLine(item, TRUE /* below */);
+            DrawLine(item, !m_dropEffectAboveItem );
         }
 
-        SetCursor(wxCURSOR_BULLSEYE);
+        SetCursor(*wxSTANDARD_CURSOR);
     }
     else
     {
@@ -2410,45 +2949,65 @@ void wxGenericTreeCtrl::DrawDropEffect(wxGenericTreeItem *item)
 
 void wxGenericTreeCtrl::DrawBorder(const wxTreeItemId &item)
 {
-    wxCHECK_RET( item.IsOk(), _T("invalid item in wxGenericTreeCtrl::DrawLine") );
+    wxCHECK_RET( item.IsOk(), "invalid item in wxGenericTreeCtrl::DrawLine" );
 
     wxGenericTreeItem *i = (wxGenericTreeItem*) item.m_pItem;
 
-    wxClientDC dc(this);
-    PrepareDC( dc );
-    dc.SetLogicalFunction(wxINVERT);
-    dc.SetBrush(*wxTRANSPARENT_BRUSH);
-
-    int w = i->GetWidth() + 2;
-    int h = GetLineHeight(i) + 2;
+    if (m_dndEffect == NoEffect)
+    {
+        m_dndEffect = BorderEffect;
+        m_dndEffectItem = i;
+    }
+    else
+    {
+        m_dndEffect = NoEffect;
+        m_dndEffectItem = NULL;
+    }
 
-    dc.DrawRectangle( i->GetX() - 1, i->GetY() - 1, w, h);
+    wxRect rect( i->GetX()-1, i->GetY()-1, i->GetWidth()+2, GetLineHeight(i)+2 );
+    CalcScrolledPosition( rect.x, rect.y, &rect.x, &rect.y );
+    RefreshRect( rect );
 }
 
 void wxGenericTreeCtrl::DrawLine(const wxTreeItemId &item, bool below)
 {
-    wxCHECK_RET( item.IsOk(), _T("invalid item in wxGenericTreeCtrl::DrawLine") );
+    wxCHECK_RET( item.IsOk(), "invalid item in wxGenericTreeCtrl::DrawLine" );
 
     wxGenericTreeItem *i = (wxGenericTreeItem*) item.m_pItem;
 
-    wxClientDC dc(this);
-    PrepareDC( dc );
-    dc.SetLogicalFunction(wxINVERT);
-
-    int x = i->GetX(),
-        y = i->GetY();
-    if ( below )
+    if (m_dndEffect == NoEffect)
     {
-        y += GetLineHeight(i) - 1;
+        if (below)
+            m_dndEffect = BelowEffect;
+        else
+            m_dndEffect = AboveEffect;
+        m_dndEffectItem = i;
+    }
+    else
+    {
+        m_dndEffect = NoEffect;
+        m_dndEffectItem = NULL;
     }
 
-    dc.DrawLine( x, y, x + i->GetWidth(), y);
+    wxRect rect( i->GetX()-1, i->GetY()-1, i->GetWidth()+2, GetLineHeight(i)+2 );
+    CalcScrolledPosition( rect.x, rect.y, &rect.x, &rect.y );
+    RefreshRect( rect );
 }
 
 // -----------------------------------------------------------------------------
-// wxWindows callbacks
+// wxWidgets callbacks
 // -----------------------------------------------------------------------------
 
+void wxGenericTreeCtrl::OnSize( wxSizeEvent &event )
+{
+#ifdef __WXGTK__
+    if (HasFlag( wxTR_FULL_ROW_HIGHLIGHT) && m_current)
+        RefreshLine( m_current );
+#endif
+
+    event.Skip(true);
+}
+
 void wxGenericTreeCtrl::OnPaint( wxPaintEvent &WXUNUSED(event) )
 {
     wxPaintDC dc(this);
@@ -2470,7 +3029,7 @@ void wxGenericTreeCtrl::OnPaint( wxPaintEvent &WXUNUSED(event) )
 
 void wxGenericTreeCtrl::OnSetFocus( wxFocusEvent &event )
 {
-    m_hasFocus = TRUE;
+    m_hasFocus = true;
 
     RefreshSelected();
 
@@ -2479,24 +3038,26 @@ void wxGenericTreeCtrl::OnSetFocus( wxFocusEvent &event )
 
 void wxGenericTreeCtrl::OnKillFocus( wxFocusEvent &event )
 {
-    m_hasFocus = FALSE;
+    m_hasFocus = false;
 
     RefreshSelected();
 
     event.Skip();
 }
 
-void wxGenericTreeCtrl::OnChar( wxKeyEvent &event )
+void wxGenericTreeCtrl::OnKeyDown( wxKeyEvent &event )
 {
-    wxTreeEvent te( wxEVT_COMMAND_TREE_KEY_DOWN, GetId() );
+    // send a tree event
+    wxTreeEvent te( wxEVT_COMMAND_TREE_KEY_DOWN, this);
     te.m_evtKey = event;
-    te.SetEventObject( this );
     if ( GetEventHandler()->ProcessEvent( te ) )
-    {
-        // intercepted by the user code
         return;
-    }
 
+    event.Skip();
+}
+
+void wxGenericTreeCtrl::OnChar( wxKeyEvent &event )
+{
     if ( (m_current == 0) || (m_key_current == 0) )
     {
         event.Skip();
@@ -2507,9 +3068,17 @@ void wxGenericTreeCtrl::OnChar( wxKeyEvent &event )
     bool is_multiple, extended_select, unselect_others;
     EventFlagsToSelType(GetWindowStyleFlag(),
                         event.ShiftDown(),
-                        event.ControlDown(),
+                        event.CmdDown(),
                         is_multiple, extended_select, unselect_others);
 
+    if (GetLayoutDirection() == wxLayout_RightToLeft)
+    {
+        if (event.GetKeyCode() == WXK_RIGHT)
+            event.m_keyCode = WXK_LEFT;
+        else if (event.GetKeyCode() == WXK_LEFT)
+            event.m_keyCode = WXK_RIGHT;
+    }
+
     // + : Expand
     // - : Collaspe
     // * : Expand all/Collapse all
@@ -2522,6 +3091,21 @@ void wxGenericTreeCtrl::OnChar( wxKeyEvent &event )
     // end   : go to last item without opening parents
     // alnum : start or continue searching for the item with this prefix
     int keyCode = event.GetKeyCode();
+
+#ifdef __WXOSX__
+    // Make the keys work as they do in the native control:
+    // right => expand
+    // left => collapse if current item is expanded
+    if (keyCode == WXK_RIGHT)
+    {
+        keyCode = '+';
+    }
+    else if (keyCode == WXK_LEFT && IsExpanded(m_current))
+    {
+        keyCode = '-';
+    }
+#endif // __WXOSX__
+
     switch ( keyCode )
     {
         case '+':
@@ -2537,7 +3121,7 @@ void wxGenericTreeCtrl::OnChar( wxKeyEvent &event )
             if ( !IsExpanded(m_current) )
             {
                 // expand all
-                ExpandAll(m_current);
+                ExpandAllChildren(m_current);
                 break;
             }
             //else: fall through to Collapse() it
@@ -2550,14 +3134,30 @@ void wxGenericTreeCtrl::OnChar( wxKeyEvent &event )
             }
             break;
 
+        case WXK_MENU:
+            {
+                // Use the item's bounding rectangle to determine position for
+                // the event
+                wxRect ItemRect;
+                GetBoundingRect(m_current, ItemRect, true);
+
+                wxTreeEvent
+                    eventMenu(wxEVT_COMMAND_TREE_ITEM_MENU, this, m_current);
+                // Use the left edge, vertical middle
+                eventMenu.m_pointDrag = wxPoint(ItemRect.GetX(),
+                                                ItemRect.GetY() +
+                                                    ItemRect.GetHeight() / 2);
+                GetEventHandler()->ProcessEvent( eventMenu );
+            }
+            break;
+
         case ' ':
         case WXK_RETURN:
             if ( !event.HasModifiers() )
             {
-                wxTreeEvent event( wxEVT_COMMAND_TREE_ITEM_ACTIVATED, GetId() );
-                event.m_item = m_current;
-                event.SetEventObject( this );
-                GetEventHandler()->ProcessEvent( event );
+                wxTreeEvent
+                   eventAct(wxEVT_COMMAND_TREE_ITEM_ACTIVATED, this, m_current);
+                GetEventHandler()->ProcessEvent( eventAct );
             }
 
             // in any case, also generate the normal key event for this key,
@@ -2584,12 +3184,15 @@ void wxGenericTreeCtrl::OnChar( wxKeyEvent &event )
                     {
                         wxTreeItemIdValue cookie;
                         wxTreeItemId current = m_key_current;
-                        // TODO: Huh?  If we get here, we'd better be the first child of our parent.  How else could it be?
+                        // TODO: Huh?  If we get here, we'd better be the first
+                        // child of our parent.  How else could it be?
                         if (current == GetFirstChild( prev, cookie ))
                         {
                             // otherwise we return to where we came from
-                            SelectItem( prev, unselect_others, extended_select );
-                            m_key_current= (wxGenericTreeItem*) prev.m_pItem;
+                            DoSelectItem(prev,
+                                         unselect_others,
+                                         extended_select);
+                            m_key_current = (wxGenericTreeItem*) prev.m_pItem;
                             break;
                         }
                     }
@@ -2605,7 +3208,7 @@ void wxGenericTreeCtrl::OnChar( wxKeyEvent &event )
                         }
                     }
 
-                    SelectItem( prev, unselect_others, extended_select );
+                    DoSelectItem( prev, unselect_others, extended_select );
                     m_key_current=(wxGenericTreeItem*) prev.m_pItem;
                 }
             }
@@ -2622,7 +3225,7 @@ void wxGenericTreeCtrl::OnChar( wxKeyEvent &event )
                 }
                 if (prev)
                 {
-                    SelectItem( prev, unselect_others, extended_select );
+                    DoSelectItem( prev, unselect_others, extended_select );
                 }
             }
             break;
@@ -2630,7 +3233,11 @@ void wxGenericTreeCtrl::OnChar( wxKeyEvent &event )
         case WXK_RIGHT:
             // this works the same as the down arrow except that we
             // also expand the item if it wasn't expanded yet
-            Expand(m_current);
+            if (m_current != GetRootItem().m_pItem || !HasFlag(wxTR_HIDE_ROOT))
+                Expand(m_current);
+            //else: don't try to expand hidden root item (which can be the
+            //      current one when the tree is empty)
+
             // fall through
 
         case WXK_DOWN:
@@ -2639,7 +3246,10 @@ void wxGenericTreeCtrl::OnChar( wxKeyEvent &event )
                 {
                     wxTreeItemIdValue cookie;
                     wxTreeItemId child = GetFirstChild( m_key_current, cookie );
-                    SelectItem( child, unselect_others, extended_select );
+                    if ( !child )
+                        break;
+
+                    DoSelectItem( child, unselect_others, extended_select );
                     m_key_current=(wxGenericTreeItem*) child.m_pItem;
                 }
                 else
@@ -2656,7 +3266,7 @@ void wxGenericTreeCtrl::OnChar( wxKeyEvent &event )
                     }
                     if (next)
                     {
-                        SelectItem( next, unselect_others, extended_select );
+                        DoSelectItem( next, unselect_others, extended_select );
                         m_key_current=(wxGenericTreeItem*) next.m_pItem;
                     }
                 }
@@ -2674,7 +3284,7 @@ void wxGenericTreeCtrl::OnChar( wxKeyEvent &event )
 
                     // it may happen if the item was expanded but then all of
                     // its children have been deleted - so IsExpanded() returned
-                    // TRUE, but GetLastChild() returned invalid item
+                    // true, but GetLastChild() returned invalid item
                     if ( !lastChild )
                         break;
 
@@ -2683,7 +3293,7 @@ void wxGenericTreeCtrl::OnChar( wxKeyEvent &event )
 
                 if ( last.IsOk() )
                 {
-                    SelectItem( last, unselect_others, extended_select );
+                    DoSelectItem( last, unselect_others, extended_select );
                 }
             }
             break;
@@ -2703,7 +3313,7 @@ void wxGenericTreeCtrl::OnChar( wxKeyEvent &event )
                         break;
                 }
 
-                SelectItem( prev, unselect_others, extended_select );
+                DoSelectItem( prev, unselect_others, extended_select );
             }
             break;
 
@@ -2712,21 +3322,28 @@ void wxGenericTreeCtrl::OnChar( wxKeyEvent &event )
             if ( !event.HasModifiers() &&
                  ((keyCode >= '0' && keyCode <= '9') ||
                   (keyCode >= 'a' && keyCode <= 'z') ||
-                  (keyCode >= 'A' && keyCode <= 'Z' )))
+                  (keyCode >= 'A' && keyCode <= 'Z') ||
+                  (keyCode == '_')))
             {
                 // find the next item starting with the given prefix
-                char ch = (char)keyCode;
-
-                wxTreeItemId id = FindItem(m_current, m_findPrefix + (wxChar)ch);
-                if ( !id.IsOk() )
+                wxChar ch = (wxChar)keyCode;
+                wxTreeItemId id;
+
+                // if the same character is typed multiple times then go to the
+                // next entry starting with that character instead of searching
+                // for an item starting with multiple copies of this character,
+                // this is more useful and is how it works under Windows.
+                if ( m_findPrefix.length() == 1 && m_findPrefix[0] == ch )
                 {
-                    // no such item
-                    break;
+                    id = FindItem(m_current, ch);
+                }
+                else
+                {
+                    const wxString newPrefix(m_findPrefix + ch);
+                    id = FindItem(m_current, newPrefix);
+                    if ( id.IsOk() )
+                        m_findPrefix = newPrefix;
                 }
-
-                SelectItem(id);
-
-                m_findPrefix += ch;
 
                 // also start the timer to reset the current prefix if the user
                 // doesn't press any more alnum keys soon -- we wouldn't want
@@ -2736,7 +3353,32 @@ void wxGenericTreeCtrl::OnChar( wxKeyEvent &event )
                     m_findTimer = new wxTreeFindTimer(this);
                 }
 
+                // Notice that we should start the timer even if we didn't find
+                // anything to make sure we reset the search state later.
                 m_findTimer->Start(wxTreeFindTimer::DELAY, wxTIMER_ONE_SHOT);
+
+                if ( id.IsOk() )
+                {
+                    SelectItem(id);
+
+                    // Reset the bell flag if it had been temporarily disabled
+                    // before.
+                    if ( m_findBell )
+                        m_findBell = 1;
+                }
+                else // No such item
+                {
+                    // Signal it with a bell if enabled.
+                    if ( m_findBell == 1 )
+                    {
+                        ::wxBell();
+
+                        // Disable it for the next unsuccessful match, we only
+                        // beep once, this is usually enough and continuing to
+                        // do it would be annoying.
+                        m_findBell = -1;
+                    }
+                }
             }
             else
             {
@@ -2745,11 +3387,9 @@ void wxGenericTreeCtrl::OnChar( wxKeyEvent &event )
     }
 }
 
-wxTreeItemId wxGenericTreeCtrl::HitTest(const wxPoint& point, int& flags)
+wxTreeItemId
+wxGenericTreeCtrl::DoTreeHitTest(const wxPoint& point, int& flags) const
 {
-    // JACS: removed wxYieldIfNeeded() because it can cause the window
-    // to be deleted from under us if a close window event is pending
-
     int w, h;
     GetSize(&w, &h);
     flags=0;
@@ -2778,48 +3418,79 @@ wxTreeItemId wxGenericTreeCtrl::HitTest(const wxPoint& point, int& flags)
 // get the bounding rectangle of the item (or of its label only)
 bool wxGenericTreeCtrl::GetBoundingRect(const wxTreeItemId& item,
                                         wxRect& rect,
-                                        bool WXUNUSED(textOnly)) const
+                                        bool textOnly) const
 {
-    wxCHECK_MSG( item.IsOk(), FALSE, _T("invalid item in wxGenericTreeCtrl::GetBoundingRect") );
+    wxCHECK_MSG( item.IsOk(), false,
+                 "invalid item in wxGenericTreeCtrl::GetBoundingRect" );
 
     wxGenericTreeItem *i = (wxGenericTreeItem*) item.m_pItem;
 
-    int startX, startY;
-    GetViewStart(& startX, & startY);
+    if ( textOnly )
+    {
+        int image_h = 0, image_w = 0;
+        int image = ((wxGenericTreeItem*) item.m_pItem)->GetCurrentImage();
+        if ( image != NO_IMAGE && m_imageListNormal )
+        {
+            m_imageListNormal->GetSize( image, image_w, image_h );
+            image_w += MARGIN_BETWEEN_IMAGE_AND_TEXT;
+        }
+
+        int state_h = 0, state_w = 0;
+        int state = ((wxGenericTreeItem*) item.m_pItem)->GetState();
+        if ( state != wxTREE_ITEMSTATE_NONE && m_imageListState )
+        {
+            m_imageListState->GetSize( state, state_w, state_h );
+            if ( image_w != 0 )
+                state_w += MARGIN_BETWEEN_STATE_AND_IMAGE;
+            else
+                state_w += MARGIN_BETWEEN_IMAGE_AND_TEXT;
+        }
+
+        rect.x = i->GetX() + state_w + image_w;
+        rect.width = i->GetWidth() - state_w - image_w;
 
-    rect.x = i->GetX() - startX*PIXELS_PER_UNIT;
-    rect.y = i->GetY() - startY*PIXELS_PER_UNIT;
-    rect.width = i->GetWidth();
-    //rect.height = i->GetHeight();
+    }
+    else // the entire line
+    {
+        rect.x = 0;
+        rect.width = GetClientSize().x;
+    }
+
+    rect.y = i->GetY();
     rect.height = GetLineHeight(i);
 
-    return TRUE;
+    // we have to return the logical coordinates, not physical ones
+    rect.SetTopLeft(CalcScrolledPosition(rect.GetTopLeft()));
+
+    return true;
 }
 
-void wxGenericTreeCtrl::Edit( const wxTreeItemId& item )
+wxTextCtrl *wxGenericTreeCtrl::EditLabel(const wxTreeItemId& item,
+                                  wxClassInfo * WXUNUSED(textCtrlClass))
 {
-    wxCHECK_RET( item.IsOk(), _T("can't edit an invalid item") );
+    wxCHECK_MSG( item.IsOk(), NULL, wxT("can't edit an invalid item") );
 
     wxGenericTreeItem *itemEdit = (wxGenericTreeItem *)item.m_pItem;
 
-    wxTreeEvent te( wxEVT_COMMAND_TREE_BEGIN_LABEL_EDIT, GetId() );
-    te.m_item = itemEdit;
-    te.SetEventObject( this );
+    wxTreeEvent te(wxEVT_COMMAND_TREE_BEGIN_LABEL_EDIT, this, itemEdit);
     if ( GetEventHandler()->ProcessEvent( te ) && !te.IsAllowed() )
     {
         // vetoed by user
-        return;
+        return NULL;
     }
 
     // We have to call this here because the label in
     // question might just have been added and no screen
     // update taken place.
     if ( m_dirty )
-        wxYieldIfNeeded();
+        DoDirtyProcessing();
 
+    // TODO: use textCtrlClass here to create the control of correct class
     m_textCtrl = new wxTreeTextCtrl(this, itemEdit);
 
     m_textCtrl->SetFocus();
+
+    return m_textCtrl;
 }
 
 // returns a pointer to the text edit control if the item is being
@@ -2830,14 +3501,20 @@ wxTextCtrl* wxGenericTreeCtrl::GetEditControl() const
     return m_textCtrl;
 }
 
+void wxGenericTreeCtrl::EndEditLabel(const wxTreeItemId& WXUNUSED(item),
+                                     bool discardChanges)
+{
+    wxCHECK_RET( m_textCtrl, wxT("not editing label") );
+
+    m_textCtrl->EndEdit(discardChanges);
+}
+
 bool wxGenericTreeCtrl::OnRenameAccept(wxGenericTreeItem *item,
                                        const wxString& value)
 {
-    wxTreeEvent le( wxEVT_COMMAND_TREE_END_LABEL_EDIT, GetId() );
-    le.m_item = item;
-    le.SetEventObject( this );
+    wxTreeEvent le(wxEVT_COMMAND_TREE_END_LABEL_EDIT, this, item);
     le.m_label = value;
-    le.m_editCancelled = FALSE;
+    le.m_editCancelled = false;
 
     return !GetEventHandler()->ProcessEvent( le ) || le.IsAllowed();
 }
@@ -2845,32 +3522,99 @@ bool wxGenericTreeCtrl::OnRenameAccept(wxGenericTreeItem *item,
 void wxGenericTreeCtrl::OnRenameCancelled(wxGenericTreeItem *item)
 {
     // let owner know that the edit was cancelled
-    wxTreeEvent le( wxEVT_COMMAND_TREE_END_LABEL_EDIT, GetId() );
-    le.m_item = item;
-    le.SetEventObject( this );
+    wxTreeEvent le(wxEVT_COMMAND_TREE_END_LABEL_EDIT, this, item);
     le.m_label = wxEmptyString;
-    le.m_editCancelled = TRUE;
+    le.m_editCancelled = true;
 
     GetEventHandler()->ProcessEvent( le );
 }
 
-
-
-
 void wxGenericTreeCtrl::OnRenameTimer()
 {
-    Edit( m_current );
+    EditLabel( m_current );
 }
 
 void wxGenericTreeCtrl::OnMouse( wxMouseEvent &event )
 {
-    if ( !m_anchor ) return;
+    if ( !m_anchor )return;
+
+    wxPoint pt = CalcUnscrolledPosition(event.GetPosition());
+
+    // Is the mouse over a tree item button?
+    int flags = 0;
+    wxGenericTreeItem *thisItem = m_anchor->HitTest(pt, this, flags, 0);
+    wxGenericTreeItem *underMouse = thisItem;
+#if wxUSE_TOOLTIPS
+    bool underMouseChanged = (underMouse != m_underMouse) ;
+#endif // wxUSE_TOOLTIPS
+
+    if ((underMouse) &&
+        (flags & wxTREE_HITTEST_ONITEMBUTTON) &&
+        (!event.LeftIsDown()) &&
+        (!m_isDragging) &&
+        (!m_renameTimer || !m_renameTimer->IsRunning()))
+    {
+    }
+    else
+    {
+        underMouse = NULL;
+    }
 
-    // we process left mouse up event (enables in-place edit), right down
+    if (underMouse != m_underMouse)
+    {
+         if (m_underMouse)
+         {
+            // unhighlight old item
+            wxGenericTreeItem *tmp = m_underMouse;
+            m_underMouse = NULL;
+            RefreshLine( tmp );
+         }
+
+         m_underMouse = underMouse;
+         if (m_underMouse)
+            RefreshLine( m_underMouse );
+    }
+
+#if wxUSE_TOOLTIPS
+    // Determines what item we are hovering over and need a tooltip for
+    wxTreeItemId hoverItem = thisItem;
+
+    // We do not want a tooltip if we are dragging, or if the rename timer is
+    // running
+    if ( underMouseChanged &&
+            hoverItem.IsOk() &&
+              !m_isDragging &&
+                (!m_renameTimer || !m_renameTimer->IsRunning()) )
+    {
+        // Ask the tree control what tooltip (if any) should be shown
+        wxTreeEvent
+            hevent(wxEVT_COMMAND_TREE_ITEM_GETTOOLTIP,  this, hoverItem);
+
+        // setting a tooltip upon leaving a view is getting the tooltip displayed
+        // on the neighbouring view ...
+#ifdef __WXOSX__
+        if ( event.Leaving() )
+            SetToolTip(NULL);
+        else
+#endif
+        if ( GetEventHandler()->ProcessEvent(hevent) )
+        {
+            // If the user permitted the tooltip change, update it, otherwise
+            // remove any old tooltip we might have.
+            if ( hevent.IsAllowed() )
+                SetToolTip(hevent.m_label);
+            else
+                SetToolTip(NULL);
+        }
+    }
+#endif
+
+    // we process left mouse up event (enables in-place edit), middle/right down
     // (pass to the user code), left dbl click (activate item) and
     // dragging/moving events for items drag-and-drop
     if ( !(event.LeftDown() ||
            event.LeftUp() ||
+           event.MiddleDown() ||
            event.RightDown() ||
            event.LeftDClick() ||
            event.Dragging() ||
@@ -2881,9 +3625,8 @@ void wxGenericTreeCtrl::OnMouse( wxMouseEvent &event )
         return;
     }
 
-    wxPoint pt = CalcUnscrolledPosition(event.GetPosition());
 
-    int flags = 0;
+    flags = 0;
     wxGenericTreeItem *item = m_anchor->HitTest(pt, this, flags, 0);
 
     if ( event.Dragging() && !m_isDragging )
@@ -2903,9 +3646,8 @@ void wxGenericTreeCtrl::OnMouse( wxMouseEvent &event )
                               ? wxEVT_COMMAND_TREE_BEGIN_RDRAG
                               : wxEVT_COMMAND_TREE_BEGIN_DRAG;
 
-        wxTreeEvent nevent( command, GetId() );
-        nevent.m_item = m_current;
-        nevent.SetEventObject(this);
+        wxTreeEvent nevent(command,  this, m_current);
+        nevent.SetPoint(CalcScrolledPosition(pt));
 
         // by default the dragging is not supported, the user code must
         // explicitly allow the event for it to take place
@@ -2914,7 +3656,7 @@ void wxGenericTreeCtrl::OnMouse( wxMouseEvent &event )
         if ( GetEventHandler()->ProcessEvent(nevent) && nevent.IsAllowed() )
         {
             // we're going to drag this item
-            m_isDragging = TRUE;
+            m_isDragging = true;
 
             // remember the old cursor because we will change it while
             // dragging
@@ -2927,7 +3669,7 @@ void wxGenericTreeCtrl::OnMouse( wxMouseEvent &event )
 
                 if ( m_oldSelection )
                 {
-                    m_oldSelection->SetHilight(FALSE);
+                    m_oldSelection->SetHilight(false);
                     RefreshLine(m_oldSelection);
                 }
             }
@@ -2935,7 +3677,7 @@ void wxGenericTreeCtrl::OnMouse( wxMouseEvent &event )
             CaptureMouse();
         }
     }
-    else if ( event.Moving() )
+    else if ( event.Dragging() )
     {
         if ( item != m_dropTarget )
         {
@@ -2947,41 +3689,63 @@ void wxGenericTreeCtrl::OnMouse( wxMouseEvent &event )
             // highlight the current drop target if any
             DrawDropEffect(m_dropTarget);
 
+#if defined(__WXMSW__) || defined(__WXMAC__) || defined(__WXGTK20__)
+            Update();
+#else
+            // TODO: remove this call or use wxEventLoopBase::GetActive()->YieldFor(wxEVT_CATEGORY_UI)
+            //       instead (needs to be tested!)
             wxYieldIfNeeded();
+#endif
         }
     }
     else if ( (event.LeftUp() || event.RightUp()) && m_isDragging )
     {
+        ReleaseMouse();
+
         // erase the highlighting
         DrawDropEffect(m_dropTarget);
 
         if ( m_oldSelection )
         {
-            m_oldSelection->SetHilight(TRUE);
+            m_oldSelection->SetHilight(true);
             RefreshLine(m_oldSelection);
-            m_oldSelection = (wxGenericTreeItem *)NULL;
+            m_oldSelection = NULL;
         }
 
         // generate the drag end event
-        wxTreeEvent event(wxEVT_COMMAND_TREE_END_DRAG, GetId());
+        wxTreeEvent eventEndDrag(wxEVT_COMMAND_TREE_END_DRAG,  this, item);
 
-        event.m_item = item;
-        event.m_pointDrag = pt;
-        event.SetEventObject(this);
+        eventEndDrag.m_pointDrag = CalcScrolledPosition(pt);
 
-        (void)GetEventHandler()->ProcessEvent(event);
+        (void)GetEventHandler()->ProcessEvent(eventEndDrag);
 
-        m_isDragging = FALSE;
-        m_dropTarget = (wxGenericTreeItem *)NULL;
-
-        ReleaseMouse();
+        m_isDragging = false;
+        m_dropTarget = NULL;
 
         SetCursor(m_oldCursor);
 
+#if defined( __WXMSW__ ) || defined(__WXMAC__) || defined(__WXGTK20__)
+        Update();
+#else
+        // TODO: remove this call or use wxEventLoopBase::GetActive()->YieldFor(wxEVT_CATEGORY_UI)
+        //       instead (needs to be tested!)
         wxYieldIfNeeded();
+#endif
     }
     else
     {
+        // If we got to this point, we are not dragging or moving the mouse.
+        // Because the code in carbon/toplevel.cpp will only set focus to the
+        // tree if we skip for EVT_LEFT_DOWN, we MUST skip this event here for
+        // focus to work.
+        // We skip even if we didn't hit an item because we still should
+        // restore focus to the tree control even if we didn't exactly hit an
+        // item.
+        if ( event.LeftDown() )
+        {
+            event.Skip();
+        }
+
         // here we process only the messages which happen on tree items
 
         m_dragCount = 0;
@@ -2990,26 +3754,53 @@ void wxGenericTreeCtrl::OnMouse( wxMouseEvent &event )
 
         if ( event.RightDown() )
         {
-            wxTreeEvent nevent(wxEVT_COMMAND_TREE_ITEM_RIGHT_CLICK, GetId());
-            nevent.m_item = item;
+            // If the item is already selected, do not update the selection.
+            // Multi-selections should not be cleared if a selected item is
+            // clicked.
+            if (!IsSelected(item))
+            {
+                DoSelectItem(item, true, false);
+            }
+
+            wxTreeEvent
+                nevent(wxEVT_COMMAND_TREE_ITEM_RIGHT_CLICK,  this, item);
+            nevent.m_pointDrag = CalcScrolledPosition(pt);
+            event.Skip(!GetEventHandler()->ProcessEvent(nevent));
+
+            // Consistent with MSW (for now), send the ITEM_MENU *after*
+            // the RIGHT_CLICK event. TODO: This behaviour may change.
+            wxTreeEvent nevent2(wxEVT_COMMAND_TREE_ITEM_MENU,  this, item);
+            nevent2.m_pointDrag = CalcScrolledPosition(pt);
+            GetEventHandler()->ProcessEvent(nevent2);
+        }
+        else if ( event.MiddleDown() )
+        {
+            wxTreeEvent
+                nevent(wxEVT_COMMAND_TREE_ITEM_MIDDLE_CLICK,  this, item);
             nevent.m_pointDrag = CalcScrolledPosition(pt);
-            nevent.SetEventObject(this);
-            GetEventHandler()->ProcessEvent(nevent);
+            event.Skip(!GetEventHandler()->ProcessEvent(nevent));
         }
         else if ( event.LeftUp() )
         {
+            if (flags & wxTREE_HITTEST_ONITEMSTATEICON)
+            {
+                wxTreeEvent
+                    nevent(wxEVT_COMMAND_TREE_STATE_IMAGE_CLICK, this, item);
+                GetEventHandler()->ProcessEvent(nevent);
+            }
+
             // this facilitates multiple-item drag-and-drop
 
-            if (item && HasFlag(wxTR_MULTIPLE))
+            if ( /* item && */ HasFlag(wxTR_MULTIPLE))
             {
                 wxArrayTreeItemIds selections;
                 size_t count = GetSelections(selections);
 
                 if (count > 1 &&
-                    !event.ControlDown() &&
+                    !event.CmdDown() &&
                     !event.ShiftDown())
                 {
-                    SelectItem(item, true, false);
+                    DoSelectItem(item, true, false);
                 }
             }
 
@@ -3029,17 +3820,25 @@ void wxGenericTreeCtrl::OnMouse( wxMouseEvent &event )
                         m_renameTimer = new wxTreeRenameTimer( this );
                     }
 
-                    m_renameTimer->Start( wxTreeRenameTimer::DELAY, TRUE );
+                    m_renameTimer->Start( wxTreeRenameTimer::DELAY, true );
                 }
 
-                m_lastOnSame = FALSE;
+                m_lastOnSame = false;
             }
         }
-        else // !RightDown() && !LeftUp() ==> LeftDown() || LeftDClick()
+        else // !RightDown() && !MiddleDown() && !LeftUp()
         {
+            // ==> LeftDown() || LeftDClick()
             if ( event.LeftDown() )
             {
-                m_lastOnSame = item == m_current;
+                // If we click on an already selected item but do it to return
+                // the focus to the control, it shouldn't start editing the
+                // item label because it's too easy to start editing
+                // accidentally (and also because nobody else does it like
+                // this). So only set this flag, used to decide whether we
+                // should start editing the label later, if we already have
+                // focus.
+                m_lastOnSame = item == m_current && HasFocus();
             }
 
             if ( flags & wxTREE_HITTEST_ONITEMBUTTON )
@@ -3060,17 +3859,19 @@ void wxGenericTreeCtrl::OnMouse( wxMouseEvent &event )
             // user clicked outside of the present selection.
             // otherwise, perform the deselection on mouse-up.
             // this allows multiple drag and drop to work.
-
-            if (!IsSelected(item))
+            // but if Cmd is down, toggle selection of the clicked item
+            if (!IsSelected(item) || event.CmdDown())
             {
                 // how should the selection work for this event?
                 bool is_multiple, extended_select, unselect_others;
                 EventFlagsToSelType(GetWindowStyleFlag(),
                                     event.ShiftDown(),
-                                    event.ControlDown(),
-                                    is_multiple, extended_select, unselect_others);
+                                    event.CmdDown(),
+                                    is_multiple,
+                                    extended_select,
+                                    unselect_others);
 
-                SelectItem(item, unselect_others, extended_select);
+                DoSelectItem(item, unselect_others, extended_select);
             }
 
 
@@ -3082,13 +3883,12 @@ void wxGenericTreeCtrl::OnMouse( wxMouseEvent &event )
                 if ( m_renameTimer )
                     m_renameTimer->Stop();
 
-                m_lastOnSame = FALSE;
+                m_lastOnSame = false;
 
                 // send activate event first
-                wxTreeEvent nevent( wxEVT_COMMAND_TREE_ITEM_ACTIVATED, GetId() );
-                nevent.m_item = item;
+                wxTreeEvent
+                    nevent(wxEVT_COMMAND_TREE_ITEM_ACTIVATED,  this, item);
                 nevent.m_pointDrag = CalcScrolledPosition(pt);
-                nevent.SetEventObject( this );
                 if ( !GetEventHandler()->ProcessEvent( nevent ) )
                 {
                     // if the user code didn't process the activate event,
@@ -3107,7 +3907,7 @@ void wxGenericTreeCtrl::OnMouse( wxMouseEvent &event )
 void wxGenericTreeCtrl::OnInternalIdle()
 {
     wxWindow::OnInternalIdle();
-    
+
     // Check if we need to select the root item
     // because nothing else has been selected.
     // Delaying it means that we can invoke event handlers
@@ -3120,65 +3920,17 @@ void wxGenericTreeCtrl::OnInternalIdle()
             SelectItem(GetRootItem());
     }
 
-    /* after all changes have been done to the tree control,
-     * we actually redraw the tree when everything is over */
-
-    if (!m_dirty) return;
-
-    m_dirty = FALSE;
-
-    CalculatePositions();
-    Refresh();
-    AdjustMyScrollbars();
+    // after all changes have been done to the tree control,
+    // actually redraw the tree when everything is over
+    if (m_dirty)
+        DoDirtyProcessing();
 }
 
-void wxGenericTreeCtrl::CalculateSize( wxGenericTreeItem *item, wxDC &dc )
-{
-    wxCoord text_w = 0;
-    wxCoord text_h = 0;
-
-    wxTreeItemAttr *attr = item->GetAttributes();
-    if ( attr && attr->HasFont() )
-        dc.SetFont(attr->GetFont());
-    else if ( item->IsBold() )
-        dc.SetFont(m_boldFont);
-
-    dc.GetTextExtent( item->GetText(), &text_w, &text_h );
-    text_h+=2;
-
-    // restore normal font
-    dc.SetFont( m_normalFont );
-
-    int image_h = 0;
-    int image_w = 0;
-    int image = item->GetCurrentImage();
-    if ( image != NO_IMAGE )
-    {
-        if ( m_imageListNormal )
-        {
-            m_imageListNormal->GetSize( image, image_w, image_h );
-            image_w += 4;
-        }
-    }
-
-    int total_h = (image_h > text_h) ? image_h : text_h;
-
-    if (total_h < 30)
-        total_h += 2;            // at least 2 pixels
-    else
-        total_h += total_h/10;   // otherwise 10% extra spacing
-
-    item->SetHeight(total_h);
-    if (total_h>m_lineHeight)
-        m_lineHeight=total_h;
-
-    item->SetWidth(image_w+text_w+2);
-}
-
-// -----------------------------------------------------------------------------
-// for developper : y is now the top of the level
-// not the middle of it !
-void wxGenericTreeCtrl::CalculateLevel( wxGenericTreeItem *item, wxDC &dc, int level, int &y )
+void
+wxGenericTreeCtrl::CalculateLevel(wxGenericTreeItem *item,
+                                  wxDC &dc,
+                                  int level,
+                                  int &y )
 {
     int x = level*m_indent;
     if (!HasFlag(wxTR_HIDE_ROOT))
@@ -3192,7 +3944,7 @@ void wxGenericTreeCtrl::CalculateLevel( wxGenericTreeItem *item, wxDC &dc, int l
         goto Recurse;
     }
 
-    CalculateSize( item, dc );
+    item->CalculateSize(this, dc);
 
     // set its position
     item->SetX( x+m_spacing );
@@ -3207,7 +3959,7 @@ void wxGenericTreeCtrl::CalculateLevel( wxGenericTreeItem *item, wxDC &dc, int l
 
   Recurse:
     wxArrayGenericTreeItems& children = item->GetChildren();
-    size_t n, count = children.Count();
+    size_t n, count = children.GetCount();
     ++level;
     for (n = 0; n < count; ++n )
         CalculateLevel( children[n], dc, level, y );  // recurse
@@ -3230,9 +3982,16 @@ void wxGenericTreeCtrl::CalculatePositions()
     CalculateLevel( m_anchor, dc, 0, y ); // start recursion
 }
 
+void wxGenericTreeCtrl::Refresh(bool eraseBackground, const wxRect *rect)
+{
+    if ( !IsFrozen() )
+        wxTreeCtrlBase::Refresh(eraseBackground, rect);
+}
+
 void wxGenericTreeCtrl::RefreshSubtree(wxGenericTreeItem *item)
 {
-    if (m_dirty) return;
+    if (m_dirty || IsFrozen() )
+        return;
 
     wxSize client = GetClientSize();
 
@@ -3241,25 +4000,29 @@ void wxGenericTreeCtrl::RefreshSubtree(wxGenericTreeItem *item)
     rect.width = client.x;
     rect.height = client.y;
 
-    Refresh(TRUE, &rect);
+    Refresh(true, &rect);
 
     AdjustMyScrollbars();
 }
 
 void wxGenericTreeCtrl::RefreshLine( wxGenericTreeItem *item )
 {
-    if (m_dirty) return;
+    if (m_dirty || IsFrozen() )
+        return;
 
     wxRect rect;
     CalcScrolledPosition(0, item->GetY(), NULL, &rect.y);
     rect.width = GetClientSize().x;
     rect.height = GetLineHeight(item); //dc.GetCharHeight() + 6;
 
-    Refresh(TRUE, &rect);
+    Refresh(true, &rect);
 }
 
 void wxGenericTreeCtrl::RefreshSelected()
 {
+    if (IsFrozen())
+        return;
+
     // TODO: this is awfully inefficient, we should keep the list of all
     //       selected items internally, should be much faster
     if ( m_anchor )
@@ -3268,6 +4031,9 @@ void wxGenericTreeCtrl::RefreshSelected()
 
 void wxGenericTreeCtrl::RefreshSelectedUnder(wxGenericTreeItem *item)
 {
+    if (IsFrozen())
+        return;
+
     if ( item->IsSelected() )
         RefreshLine(item);
 
@@ -3279,6 +4045,16 @@ void wxGenericTreeCtrl::RefreshSelectedUnder(wxGenericTreeItem *item)
     }
 }
 
+void wxGenericTreeCtrl::DoThaw()
+{
+    wxTreeCtrlBase::DoThaw();
+
+    if ( m_dirty )
+        DoDirtyProcessing();
+    else
+        Refresh();
+}
+
 // ----------------------------------------------------------------------------
 // changing colours: we need to refresh the tree control
 // ----------------------------------------------------------------------------
@@ -3286,21 +4062,109 @@ void wxGenericTreeCtrl::RefreshSelectedUnder(wxGenericTreeItem *item)
 bool wxGenericTreeCtrl::SetBackgroundColour(const wxColour& colour)
 {
     if ( !wxWindow::SetBackgroundColour(colour) )
-        return FALSE;
+        return false;
 
     Refresh();
 
-    return TRUE;
+    return true;
 }
 
 bool wxGenericTreeCtrl::SetForegroundColour(const wxColour& colour)
 {
     if ( !wxWindow::SetForegroundColour(colour) )
-        return FALSE;
+        return false;
+
+    Refresh();
+
+    return true;
+}
+
+void wxGenericTreeCtrl::OnGetToolTip( wxTreeEvent &event )
+{
+#if wxUSE_TOOLTIPS
+    wxTreeItemId itemId = event.GetItem();
+    const wxGenericTreeItem* const pItem = (wxGenericTreeItem*)itemId.m_pItem;
+
+    // Check if the item fits into the client area:
+    if ( pItem->GetX() + pItem->GetWidth() > GetClientSize().x )
+    {
+        // If it doesn't, show its full text in the tooltip.
+        event.SetLabel(pItem->GetText());
+    }
+    else
+#endif // wxUSE_TOOLTIPS
+    {
+        // veto processing the event, nixing any tooltip
+        event.Veto();
+    }
+}
+
+
+// NOTE: If using the wxListBox visual attributes works everywhere then this can
+// be removed, as well as the #else case below.
+#define _USE_VISATTR 0
+
+//static
+wxVisualAttributes
+#if _USE_VISATTR
+wxGenericTreeCtrl::GetClassDefaultAttributes(wxWindowVariant variant)
+#else
+wxGenericTreeCtrl::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
+#endif
+{
+#if _USE_VISATTR
+    // Use the same color scheme as wxListBox
+    return wxListBox::GetClassDefaultAttributes(variant);
+#else
+    wxVisualAttributes attr;
+    attr.colFg = wxSystemSettings::GetColour(wxSYS_COLOUR_LISTBOXTEXT);
+    attr.colBg = wxSystemSettings::GetColour(wxSYS_COLOUR_LISTBOX);
+    attr.font  = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
+    return attr;
+#endif
+}
 
+void wxGenericTreeCtrl::DoDirtyProcessing()
+{
+    if (IsFrozen())
+        return;
+
+    m_dirty = false;
+
+    CalculatePositions();
     Refresh();
+    AdjustMyScrollbars();
+}
+
+wxSize wxGenericTreeCtrl::DoGetBestSize() const
+{
+    // make sure all positions are calculated as normally this only done during
+    // idle time but we need them for base class DoGetBestSize() to return the
+    // correct result
+    wxConstCast(this, wxGenericTreeCtrl)->CalculatePositions();
+
+    wxSize size = wxTreeCtrlBase::DoGetBestSize();
+
+    // there seems to be an implicit extra border around the items, although
+    // I'm not really sure where does it come from -- but without this, the
+    // scrollbars appear in a tree with default/best size
+    size.IncBy(4, 4);
+
+    // and the border has to be rounded up to a multiple of PIXELS_PER_UNIT or
+    // scrollbars still appear
+    const wxSize& borderSize = GetWindowBorderSize();
+
+    int dx = (size.x - borderSize.x) % PIXELS_PER_UNIT;
+    if ( dx )
+        size.x += PIXELS_PER_UNIT - dx;
+    int dy = (size.y - borderSize.y) % PIXELS_PER_UNIT;
+    if ( dy )
+        size.y += PIXELS_PER_UNIT - dy;
+
+    // we need to update the cache too as the base class cached its own value
+    CacheBestSize(size);
 
-    return TRUE;
+    return size;
 }
 
 #endif // wxUSE_TREECTRL