]> git.saurik.com Git - wxWidgets.git/blobdiff - src/generic/treectlg.cpp
use GetFileAttributes() to check for readonly files under Win9x, the NT method doesn...
[wxWidgets.git] / src / generic / treectlg.cpp
index c0b0ca5d1a4c772c11158fd1fa144c14422ac75f..52868f92265551d5f81a472282f5e1f6bb7bf4fc 100644 (file)
 #include "wx/renderer.h"
 
 #ifdef __WXMAC__
-    #include "wx/mac/private.h"
+    #include "wx/osx/private.h"
 #endif
 
 // -----------------------------------------------------------------------------
 // array types
 // -----------------------------------------------------------------------------
 
-class WXDLLEXPORT wxGenericTreeItem;
+class WXDLLIMPEXP_FWD_CORE wxGenericTreeItem;
 
-WX_DEFINE_EXPORTED_ARRAY_PTR(wxGenericTreeItem *, wxArrayGenericTreeItems);
+WX_DEFINE_ARRAY_PTR(wxGenericTreeItem *, wxArrayGenericTreeItems);
 
 // ----------------------------------------------------------------------------
 // constants
@@ -61,6 +61,9 @@ 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;
 
@@ -92,29 +95,8 @@ class WXDLLEXPORT wxTreeTextCtrl: public wxTextCtrl
 public:
     wxTreeTextCtrl(wxGenericTreeCtrl *owner, wxGenericTreeItem *item);
 
-    void EndEdit(bool discardChanges = false)
-    {
-        if ( discardChanges )
-        {
-            StopEditing();
-        }
-        else
-        {
-            m_aboutToFinish = true;
-
-            // Notify the owner about the changes
-            AcceptChanges();
-
-            // Even if vetoed, close the control (consistent with MSW)
-            Finish();
-        }
-    }
+    void EndEdit( bool discardChanges );
 
-    void StopEditing()
-    {
-        Finish();
-        m_owner->OnRenameCancelled(m_itemEdited);
-    }
     const wxGenericTreeItem* item() const { return m_itemEdited; }
 
 protected:
@@ -123,13 +105,12 @@ protected:
     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()
@@ -159,7 +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,
@@ -175,18 +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 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; }
@@ -194,14 +199,43 @@ 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
@@ -211,10 +245,22 @@ public:
     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 item's label
@@ -254,22 +300,39 @@ public:
         if ( m_ownsAttr ) delete m_attr;
         m_attr = attr;
         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_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
 
@@ -318,7 +381,8 @@ static void EventFlagsToSelType(long style,
 }
 
 // check if the given item is under another one
-static bool IsDescendantOf(const wxGenericTreeItem *parent, const wxGenericTreeItem *item)
+static bool
+IsDescendantOf(const wxGenericTreeItem *parent, const wxGenericTreeItem *item)
 {
     while ( item )
     {
@@ -363,7 +427,6 @@ wxTreeTextCtrl::wxTreeTextCtrl(wxGenericTreeCtrl *owner,
               : m_itemEdited(item), m_startValue(item->GetText())
 {
     m_owner = owner;
-    m_finished = false;
     m_aboutToFinish = false;
 
     int w = m_itemEdited->GetWidth(),
@@ -407,6 +470,26 @@ wxTreeTextCtrl::wxTreeTextCtrl(wxGenericTreeCtrl *owner,
                  wxPoint(x - 4, y - 4), wxSize(w + 11, h + 8));
 }
 
+void wxTreeTextCtrl::EndEdit(bool discardChanges)
+{
+    m_aboutToFinish = true;
+
+    if ( discardChanges )
+    {
+        m_owner->OnRenameCancelled(m_itemEdited);
+
+        Finish( true );
+    }
+    else
+    {
+        // Notify the owner about the changes
+        AcceptChanges();
+
+        // Even if vetoed, close the control (consistent with MSW)
+        Finish( true );
+    }
+}
+
 bool wxTreeTextCtrl::AcceptChanges()
 {
     const wxString value = GetValue();
@@ -435,18 +518,14 @@ bool wxTreeTextCtrl::AcceptChanges()
     return true;
 }
 
-void wxTreeTextCtrl::Finish()
+void wxTreeTextCtrl::Finish( bool setfocus )
 {
-    if ( !m_finished  )
-    {
-        m_owner->ResetTextControl();
+    m_owner->ResetTextControl();
 
-        wxPendingDelete.Append(this);
-
-        m_finished = true;
+    wxPendingDelete.Append(this);
 
+    if (setfocus)
         m_owner->SetFocus();
-    }
 }
 
 void wxTreeTextCtrl::OnChar( wxKeyEvent &event )
@@ -454,11 +533,11 @@ void wxTreeTextCtrl::OnChar( wxKeyEvent &event )
     switch ( event.m_keyCode )
     {
         case WXK_RETURN:
-            EndEdit();
+            EndEdit( false );
             break;
 
         case WXK_ESCAPE:
-            StopEditing();
+            EndEdit( true );
             break;
 
         default:
@@ -468,7 +547,7 @@ 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();
@@ -488,18 +567,15 @@ void wxTreeTextCtrl::OnKeyUp( wxKeyEvent &event )
 
 void wxTreeTextCtrl::OnKillFocus( wxFocusEvent &event )
 {
-    if ( !m_finished && !m_aboutToFinish )
+    if ( !m_aboutToFinish )
     {
-        // We must finish regardless of success, otherwise we'll get
-        // focus problems:
-        Finish();
-
         if ( !AcceptChanges() )
             m_owner->OnRenameCancelled( m_itemEdited );
+
+        Finish( false );
     }
 
-    // We must let the native text control handle focus, too, otherwise
-    // it could have problems with the cursor (e.g., in wxGTK).
+    // We should let the native text control handle focus, too.
     event.Skip();
 }
 
@@ -519,6 +595,7 @@ 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;
@@ -534,6 +611,9 @@ wxGenericTreeItem::wxGenericTreeItem(wxGenericTreeItem *parent,
     // We don't know the height here yet.
     m_width = 0;
     m_height = 0;
+
+    m_widthText = -1;
+    m_heightText = -1;
 }
 
 wxGenericTreeItem::~wxGenericTreeItem()
@@ -543,12 +623,12 @@ 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];
@@ -563,14 +643,9 @@ void wxGenericTreeItem::DeleteChildren(wxGenericTreeCtrl *tree)
     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;
 
@@ -593,7 +668,7 @@ 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 );
@@ -644,10 +719,29 @@ 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;
@@ -668,7 +762,7 @@ wxGenericTreeItem *wxGenericTreeItem::HitTest(const wxPoint& point,
     }
 
     // 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,
@@ -712,6 +806,111 @@ 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;
+    int image_w = 0;
+    int image = GetCurrentImage();
+    if ( image != NO_IMAGE )
+    {
+        if ( 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 )
+    {
+        if ( control->m_imageListState )
+        {
+            control->m_imageListState->GetSize( state, state_w, state_h );
+            if ( image != NO_IMAGE )
+                state_w += MARGIN_BETWEEN_STATE_AND_IMAGE;
+            else
+                state_w += MARGIN_BETWEEN_IMAGE_AND_TEXT;
+        }
+    }
+
+    m_height = (image_h > text_h) ? image_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
 // -----------------------------------------------------------------------------
@@ -720,6 +919,7 @@ IMPLEMENT_DYNAMIC_CLASS(wxGenericTreeCtrl, wxControl)
 
 BEGIN_EVENT_TABLE(wxGenericTreeCtrl, wxTreeCtrlBase)
     EVT_PAINT          (wxGenericTreeCtrl::OnPaint)
+    EVT_SIZE           (wxGenericTreeCtrl::OnSize)
     EVT_MOUSE_EVENTS   (wxGenericTreeCtrl::OnMouse)
     EVT_CHAR           (wxGenericTreeCtrl::OnChar)
     EVT_SET_FOCUS      (wxGenericTreeCtrl::OnSetFocus)
@@ -759,7 +959,7 @@ void wxGenericTreeCtrl::Init()
                             (
                                 wxSYS_COLOUR_HIGHLIGHT
                             ),
-                            wxSOLID
+                            wxBRUSHSTYLE_SOLID
                          );
 
     m_hilightUnfocusedBrush = new wxBrush
@@ -768,7 +968,7 @@ void wxGenericTreeCtrl::Init()
                                  (
                                      wxSYS_COLOUR_BTNSHADOW
                                  ),
-                                 wxSOLID
+                                 wxBRUSHSTYLE_SOLID
                               );
 
     m_imageListButtons = NULL;
@@ -781,7 +981,6 @@ void wxGenericTreeCtrl::Init()
     m_textCtrl = NULL;
 
     m_renameTimer = NULL;
-    m_freezeCount = 0;
 
     m_findTimer = NULL;
 
@@ -789,8 +988,12 @@ void wxGenericTreeCtrl::Init()
 
     m_lastOnSame = false;
 
-#ifdef __WXMAC_CARBON__
-    m_normalFont.MacCreateThemeFont( kThemeViewsFont ) ;
+#if defined( __WXMAC__ )
+#if wxOSX_USE_CARBON
+    m_normalFont.MacCreateFromThemeFont( kThemeViewsFont ) ;
+#else
+    m_normalFont.MacCreateFromUIFont( kCTFontViewsFontType ) ;
+#endif
 #else
     m_normalFont = wxSystemSettings::GetFont( wxSYS_DEFAULT_GUI_FONT );
 #endif
@@ -812,11 +1015,9 @@ bool wxGenericTreeCtrl::Create(wxWindow *parent,
                                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;
 #endif // __WXMAC__
@@ -842,9 +1043,16 @@ bool wxGenericTreeCtrl::Create(wxWindow *parent,
     if (!m_hasFont)
         SetOwnFont(attr.font);
 
-    m_dottedPen = wxPen( wxT("grey"), 0, 0 );
+    // 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
 
-    SetBestSize(size);
+    SetInitialSize(size);
 
     return true;
 }
@@ -944,6 +1152,14 @@ 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") );
@@ -952,7 +1168,8 @@ 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") );
 
@@ -968,14 +1185,14 @@ 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);
 }
 
@@ -987,13 +1204,12 @@ 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") );
 
@@ -1003,6 +1219,16 @@ void wxGenericTreeCtrl::SetItemData(const wxTreeItemId& item, wxTreeItemData *da
     ((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") );
@@ -1021,6 +1247,10 @@ 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);
     }
 }
@@ -1064,12 +1294,15 @@ 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);
 }
 
@@ -1086,6 +1319,9 @@ bool wxGenericTreeCtrl::SetFont( const wxFont &font )
                         m_normalFont.GetFaceName(),
                         m_normalFont.GetEncoding());
 
+    if (m_anchor)
+        m_anchor->RecursiveResetTextSize();
+
     return true;
 }
 
@@ -1184,12 +1420,13 @@ 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)++);
     }
@@ -1200,42 +1437,13 @@ 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
@@ -1255,7 +1463,8 @@ 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
@@ -1324,6 +1533,7 @@ 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())
@@ -1340,10 +1550,37 @@ 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
@@ -1389,10 +1626,13 @@ wxTreeItemId wxGenericTreeCtrl::FindItem(const wxTreeItemId& idParent,
         }
 
         // and try all the items (stop when we get to the one we started from)
-        while ( id != idParent && !GetItemText(id).Lower().StartsWith(prefix) )
+        while ( id.IsOk() && id != idParent &&
+                    !GetItemText(id).Lower().StartsWith(prefix) )
         {
             id = GetNext(id);
         }
+        // If we haven't found the item, id.IsOk() will be false, as per
+        // documentation
     }
 
     return id;
@@ -1429,6 +1669,7 @@ wxTreeItemId wxGenericTreeCtrl::DoInsertItem(const wxTreeItemId& parentId,
     parent->Insert( item, previous == (size_t)-1 ? parent->GetChildren().size()
                                                  : previous );
 
+    InvalidateBestSize();
     return item;
 }
 
@@ -1437,7 +1678,7 @@ wxTreeItemId wxGenericTreeCtrl::AddRoot(const wxString& text,
                                         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
 
@@ -1463,6 +1704,7 @@ wxTreeItemId wxGenericTreeCtrl::AddRoot(const wxString& text,
         m_current->SetHilight( true );
     }
 
+    InvalidateBestSize();
     return m_anchor;
 }
 
@@ -1482,9 +1724,11 @@ wxTreeItemId wxGenericTreeCtrl::DoInsertAfter(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);
@@ -1493,25 +1737,31 @@ wxTreeItemId wxGenericTreeCtrl::DoInsertAfter(const wxTreeItemId& parentId,
 
 void wxGenericTreeCtrl::SendDeleteEvent(wxGenericTreeItem *item)
 {
-    wxTreeEvent event( wxEVT_COMMAND_TREE_DELETE_ITEM, GetId() );
-    event.m_item = item;
-    event.SetEventObject( this );
-    ProcessEvent( event );
+    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 != NULL && item != m_textCtrl->item() && IsDescendantOf(item, m_textCtrl->item())) {
-        m_textCtrl->StopEditing();
+    if ( m_textCtrl && item != m_textCtrl->item() &&
+            IsDescendantOf(item, m_textCtrl->item()) )
+    {
+        m_textCtrl->EndEdit( true );
     }
-    if (item != m_key_current && IsDescendantOf(item, m_key_current)) {
+
+    if ( item != m_key_current && IsDescendantOf(item, m_key_current) )
+    {
         m_key_current = NULL;
     }
-    if (IsDescendantOf(item, m_select_me)) {
+
+    if ( IsDescendantOf(item, m_select_me) )
+    {
         m_select_me = item;
     }
-    if (item != m_current && IsDescendantOf(item, m_current)) {
+
+    if ( item != m_current && IsDescendantOf(item, m_current) )
+    {
         m_current->SetHilight( false );
         m_current = NULL;
         m_select_me = item;
@@ -1525,6 +1775,7 @@ void wxGenericTreeCtrl::DeleteChildren(const wxTreeItemId& itemId)
     wxGenericTreeItem *item = (wxGenericTreeItem*) itemId.m_pItem;
     ChildrenClosing(item);
     item->DeleteChildren(this);
+    InvalidateBestSize();
 }
 
 void wxGenericTreeCtrl::Delete(const wxTreeItemId& itemId)
@@ -1536,7 +1787,7 @@ void wxGenericTreeCtrl::Delete(const wxTreeItemId& itemId)
     if (m_textCtrl != NULL && IsDescendantOf(item, m_textCtrl->item()))
     {
         // can't delete the item being edited, cancel editing it first
-        m_textCtrl->StopEditing();
+        m_textCtrl->EndEdit( true );
     }
 
     wxGenericTreeItem *parent = item->GetParent();
@@ -1589,6 +1840,8 @@ void wxGenericTreeCtrl::Delete(const wxTreeItemId& itemId)
         m_select_me = NULL;
 
     delete item;
+
+    InvalidateBestSize();
 }
 
 void wxGenericTreeCtrl::DeleteAllItems()
@@ -1613,42 +1866,28 @@ 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)
@@ -1661,10 +1900,8 @@ void wxGenericTreeCtrl::Collapse(const wxTreeItemId& itemId)
     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;
@@ -1675,7 +1912,7 @@ void wxGenericTreeCtrl::Collapse(const wxTreeItemId& itemId)
 
 #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]);
@@ -1687,7 +1924,7 @@ 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)
@@ -1729,7 +1966,7 @@ void wxGenericTreeCtrl::UnselectAllChildren(wxGenericTreeItem *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]);
@@ -1754,7 +1991,10 @@ void wxGenericTreeCtrl::UnselectAll()
 // 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();
 
@@ -1765,16 +2005,20 @@ 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);
@@ -1785,7 +2029,7 @@ bool wxGenericTreeCtrl::TagAllChildrenUntilLast(wxGenericTreeItem *crt_item, wxG
     if (crt_item->HasChildren())
     {
         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))
@@ -1796,7 +2040,9 @@ bool wxGenericTreeCtrl::TagAllChildrenUntilLast(wxGenericTreeItem *crt_item, wxG
   return false;
 }
 
-void wxGenericTreeCtrl::SelectItemRange(wxGenericTreeItem *item1, wxGenericTreeItem *item2)
+void
+wxGenericTreeCtrl::SelectItemRange(wxGenericTreeItem *item1,
+                                   wxGenericTreeItem *item2)
 {
     m_select_me = NULL;
 
@@ -1843,10 +2089,8 @@ void wxGenericTreeCtrl::DoSelectItem(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() )
@@ -1873,7 +2117,8 @@ void wxGenericTreeCtrl::DoSelectItem(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)
@@ -1912,8 +2157,15 @@ void wxGenericTreeCtrl::SelectItem(const wxTreeItemId& itemId, bool select)
         wxGenericTreeItem *item = (wxGenericTreeItem*) itemId.m_pItem;
         wxCHECK_RET( item, wxT("SelectItem(): invalid tree item") );
 
+        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 );
     }
 }
 
@@ -1942,7 +2194,7 @@ 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)
@@ -1989,7 +2241,7 @@ void wxGenericTreeCtrl::ScrollTo(const wxTreeItemId &item)
 #if defined( __WXMSW__ ) || defined(__WXMAC__)
         Update();
 #else
-        wxYieldIfNeeded();
+        DoDirtyProcessing();
 #endif
     wxGenericTreeItem *gitem = (wxGenericTreeItem*) item.m_pItem;
 
@@ -2015,7 +2267,9 @@ void wxGenericTreeCtrl::ScrollTo(const wxTreeItemId &item)
         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 );
+        SetScrollbars( PIXELS_PER_UNIT, PIXELS_PER_UNIT,
+                       x/PIXELS_PER_UNIT, y/PIXELS_PER_UNIT,
+                       x_pos, item_y/PIXELS_PER_UNIT );
     }
     else if (item_y+GetLineHeight(gitem) > start_y+client_h)
     {
@@ -2028,7 +2282,10 @@ void wxGenericTreeCtrl::ScrollTo(const wxTreeItemId &item)
         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 );
+        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 );
     }
 }
 
@@ -2038,7 +2295,8 @@ 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);
 }
@@ -2053,7 +2311,7 @@ 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;
 
@@ -2083,6 +2341,20 @@ 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.
@@ -2109,6 +2381,10 @@ void wxGenericTreeCtrl::SetImageList(wxImageList *imageList)
     m_imageListNormal = imageList;
     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)
@@ -2120,6 +2396,15 @@ void wxGenericTreeCtrl::SetStateImageList(wxImageList *imageList)
     if (m_ownsImageListState) delete m_imageListState;
     m_imageListState = imageList;
     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)
@@ -2128,6 +2413,10 @@ void wxGenericTreeCtrl::SetButtonsImageList(wxImageList *imageList)
     m_imageListButtons = imageList;
     m_ownsImageListButtons = false;
     m_dirty = true;
+
+    if (m_anchor)
+        m_anchor->RecursiveResetSize();
+
     CalculateLineHeight();
 }
 
@@ -2151,7 +2440,9 @@ 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
     {
@@ -2169,16 +2460,10 @@ 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();
@@ -2195,94 +2480,172 @@ void wxGenericTreeCtrl::PaintItem(wxGenericTreeItem *item, wxDC& dc)
         }
     }
 
-    int total_h = GetLineHeight(item);
-    bool drawItemBackground = false;
-
-    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 != NO_IMAGE )
+                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 = true;
+            drawItemBackground =
+            hasBgColour = true;
             colBg = attr->GetBackgroundColour();
         }
         else
         {
             colBg = GetBackgroundColour();
         }
-        dc.SetBrush(wxBrush(colBg, wxSOLID));
+        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
         }
         // 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()-2, item->GetY()+offset,
+                         item->GetWidth()+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 );
 }
 
-// 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))
@@ -2294,7 +2657,7 @@ 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;
@@ -2303,7 +2666,8 @@ 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;
@@ -2337,16 +2701,20 @@ void wxGenericTreeCtrl::PaintLevel( wxGenericTreeItem *item, wxDC &dc, int level
 
         wxColour colText;
         if ( item->IsSelected()
-#ifdef __WXMAC__
+#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
+             && m_hasFocus && IsControlActive( (ControlRef)GetHandle() )
 #endif
             )
         {
+#ifdef __WXMAC__
+            colText = *wxWHITE;
+#else
             colText = wxSystemSettings::GetColour(wxSYS_COLOUR_HIGHLIGHTTEXT);
+#endif
         }
         else
         {
@@ -2438,7 +2806,7 @@ 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;
@@ -2454,7 +2822,8 @@ 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
+                // 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);
@@ -2466,8 +2835,8 @@ void wxGenericTreeCtrl::PaintLevel( wxGenericTreeItem *item, wxDC &dc, int level
                 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);
             }
@@ -2502,7 +2871,7 @@ 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;
 
@@ -2519,7 +2888,7 @@ void wxGenericTreeCtrl::DrawBorder(const wxTreeItemId &item)
 
 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;
 
@@ -2541,6 +2910,16 @@ void wxGenericTreeCtrl::DrawLine(const wxTreeItemId &item, bool below)
 // 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);
@@ -2580,9 +2959,8 @@ void wxGenericTreeCtrl::OnKillFocus( wxFocusEvent &event )
 
 void wxGenericTreeCtrl::OnChar( wxKeyEvent &event )
 {
-    wxTreeEvent te( wxEVT_COMMAND_TREE_KEY_DOWN, GetId() );
+    wxTreeEvent te( wxEVT_COMMAND_TREE_KEY_DOWN, this);
     te.m_evtKey = event;
-    te.SetEventObject( this );
     if ( GetEventHandler()->ProcessEvent( te ) )
     {
         // intercepted by the user code
@@ -2602,6 +2980,14 @@ void wxGenericTreeCtrl::OnChar( wxKeyEvent &event )
                         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
@@ -2629,7 +3015,7 @@ void wxGenericTreeCtrl::OnChar( wxKeyEvent &event )
             if ( !IsExpanded(m_current) )
             {
                 // expand all
-                ExpandAll(m_current);
+                ExpandAllChildren(m_current);
                 break;
             }
             //else: fall through to Collapse() it
@@ -2644,26 +3030,27 @@ void wxGenericTreeCtrl::OnChar( wxKeyEvent &event )
 
         case WXK_MENU:
             {
-                // Use the item's bounding rectangle to determine position for the event
+                // 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, GetId() );
-                eventMenu.m_item = m_current;
+                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);
-                eventMenu.SetEventObject( this );
+                                                ItemRect.GetY() +
+                                                    ItemRect.GetHeight() / 2);
                 GetEventHandler()->ProcessEvent( eventMenu );
-                break;
             }
+            break;
+
         case ' ':
         case WXK_RETURN:
             if ( !event.HasModifiers() )
             {
-                wxTreeEvent eventAct( wxEVT_COMMAND_TREE_ITEM_ACTIVATED, GetId() );
-                eventAct.m_item = m_current;
-                eventAct.SetEventObject( this );
+                wxTreeEvent
+                   eventAct(wxEVT_COMMAND_TREE_ITEM_ACTIVATED, this, m_current);
                 GetEventHandler()->ProcessEvent( eventAct );
             }
 
@@ -2691,12 +3078,15 @@ 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
-                            DoSelectItem( 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;
                         }
                     }
@@ -2737,7 +3127,11 @@ 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:
@@ -2746,6 +3140,9 @@ void wxGenericTreeCtrl::OnChar( wxKeyEvent &event )
                 {
                     wxTreeItemIdValue cookie;
                     wxTreeItemId child = GetFirstChild( m_key_current, cookie );
+                    if ( !child )
+                        break;
+
                     DoSelectItem( child, unselect_others, extended_select );
                     m_key_current=(wxGenericTreeItem*) child.m_pItem;
                 }
@@ -2885,7 +3282,8 @@ bool wxGenericTreeCtrl::GetBoundingRect(const wxTreeItemId& item,
                                         wxRect& rect,
                                         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;
 
@@ -2923,9 +3321,7 @@ wxTextCtrl *wxGenericTreeCtrl::EditLabel(const wxTreeItemId& 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
@@ -2939,7 +3335,7 @@ wxTextCtrl *wxGenericTreeCtrl::EditLabel(const wxTreeItemId& item,
 #if defined( __WXMSW__ ) || defined(__WXMAC__)
         Update();
 #else
-        wxYieldIfNeeded();
+        DoDirtyProcessing();
 #endif
 
     // TODO: use textCtrlClass here to create the control of correct class
@@ -2969,9 +3365,7 @@ void wxGenericTreeCtrl::EndEditLabel(const wxTreeItemId& WXUNUSED(item),
 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;
 
@@ -2981,9 +3375,7 @@ 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;
 
@@ -2997,7 +3389,7 @@ void wxGenericTreeCtrl::OnRenameTimer()
 
 void wxGenericTreeCtrl::OnMouse( wxMouseEvent &event )
 {
-    if ( !m_anchor ) return;
+    if ( !m_anchor )return;
 
     wxPoint pt = CalcUnscrolledPosition(event.GetPosition());
 
@@ -3040,13 +3432,16 @@ void wxGenericTreeCtrl::OnMouse( wxMouseEvent &event )
     // 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()))
+    // 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, GetId());
-        hevent.m_item = hoverItem;
-        hevent.SetEventObject(this);
+        wxTreeEvent
+            hevent(wxEVT_COMMAND_TREE_ITEM_GETTOOLTIP,  this, hoverItem);
 
         if ( GetEventHandler()->ProcessEvent(hevent) && hevent.IsAllowed() )
         {
@@ -3055,11 +3450,12 @@ void wxGenericTreeCtrl::OnMouse( wxMouseEvent &event )
     }
 #endif
 
-    // we process left mouse up event (enables in-place edit), right down
+    // 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() ||
@@ -3091,9 +3487,7 @@ 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
@@ -3158,11 +3552,9 @@ void wxGenericTreeCtrl::OnMouse( wxMouseEvent &event )
         }
 
         // generate the drag end event
-        wxTreeEvent eventEndDrag(wxEVT_COMMAND_TREE_END_DRAG, GetId());
+        wxTreeEvent eventEndDrag(wxEVT_COMMAND_TREE_END_DRAG,  this, item);
 
-        eventEndDrag.m_item = item;
         eventEndDrag.m_pointDrag = CalcScrolledPosition(pt);
-        eventEndDrag.SetEventObject(this);
 
         (void)GetEventHandler()->ProcessEvent(eventEndDrag);
 
@@ -3180,10 +3572,12 @@ void wxGenericTreeCtrl::OnMouse( wxMouseEvent &event )
     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.
+        // 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.
+        // restore focus to the tree control even if we didn't exactly hit an
+        // item.
         if ( event.LeftDown() )
         {
             event.Skip();
@@ -3198,28 +3592,40 @@ void wxGenericTreeCtrl::OnMouse( wxMouseEvent &event )
         if ( event.RightDown() )
         {
             // If the item is already selected, do not update the selection.
-            // Multi-selections should not be cleared if a selected item is clicked.
+            // 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, GetId());
-            nevent.m_item = item;
+            wxTreeEvent
+                nevent(wxEVT_COMMAND_TREE_ITEM_RIGHT_CLICK,  this, item);
             nevent.m_pointDrag = CalcScrolledPosition(pt);
-            nevent.SetEventObject(this);
             event.Skip(!GetEventHandler()->ProcessEvent(nevent));
 
             // Consistent with MSW (for now), send the ITEM_MENU *after*
             // the RIGHT_CLICK event. TODO: This behavior may change.
-            wxTreeEvent nevent2(wxEVT_COMMAND_TREE_ITEM_MENU, GetId());
-            nevent2.m_item = item;
+            wxTreeEvent nevent2(wxEVT_COMMAND_TREE_ITEM_MENU,  this, item);
             nevent2.m_pointDrag = CalcScrolledPosition(pt);
-            nevent2.SetEventObject(this);
             GetEventHandler()->ProcessEvent(nevent2);
         }
+        else if ( event.MiddleDown() )
+        {
+            wxTreeEvent
+                nevent(wxEVT_COMMAND_TREE_ITEM_MIDDLE_CLICK,  this, item);
+            nevent.m_pointDrag = CalcScrolledPosition(pt);
+            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))
@@ -3257,8 +3663,9 @@ void wxGenericTreeCtrl::OnMouse( wxMouseEvent &event )
                 m_lastOnSame = false;
             }
         }
-        else // !RightDown() && !LeftUp() ==> LeftDown() || LeftDClick()
+        else // !RightDown() && !MiddleDown() && !LeftUp()
         {
+            // ==> LeftDown() || LeftDClick()
             if ( event.LeftDown() )
             {
                 m_lastOnSame = item == m_current;
@@ -3290,7 +3697,9 @@ void wxGenericTreeCtrl::OnMouse( wxMouseEvent &event )
                 EventFlagsToSelType(GetWindowStyleFlag(),
                                     event.ShiftDown(),
                                     event.CmdDown(),
-                                    is_multiple, extended_select, unselect_others);
+                                    is_multiple,
+                                    extended_select,
+                                    unselect_others);
 
                 DoSelectItem(item, unselect_others, extended_select);
             }
@@ -3307,10 +3716,9 @@ void wxGenericTreeCtrl::OnMouse( wxMouseEvent &event )
                 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,
@@ -3342,68 +3750,17 @@ 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;
-    if (m_freezeCount) return;
-
-    m_dirty = false;
-
-    CalculatePositions();
-    Refresh();
-    AdjustMyScrollbars();
-}
-
-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);
-    else
-        dc.SetFont(m_normalFont);
-
-    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 += MARGIN_BETWEEN_IMAGE_AND_TEXT;
-        }
-    }
-
-    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);
+    // after all changes have been done to the tree control,
+    // actually redraw the tree when everything is over
+    if (m_dirty)
+        DoDirtyProcessing();
 }
 
-// -----------------------------------------------------------------------------
-// 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))
@@ -3417,7 +3774,7 @@ 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 );
@@ -3432,7 +3789,7 @@ 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
@@ -3455,10 +3812,16 @@ 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_freezeCount) return;
+    if (m_dirty || IsFrozen() )
+        return;
 
     wxSize client = GetClientSize();
 
@@ -3474,8 +3837,8 @@ void wxGenericTreeCtrl::RefreshSubtree(wxGenericTreeItem *item)
 
 void wxGenericTreeCtrl::RefreshLine( wxGenericTreeItem *item )
 {
-    if (m_dirty) return;
-    if (m_freezeCount) return;
+    if (m_dirty || IsFrozen() )
+        return;
 
     wxRect rect;
     CalcScrolledPosition(0, item->GetY(), NULL, &rect.y);
@@ -3487,7 +3850,8 @@ void wxGenericTreeCtrl::RefreshLine( wxGenericTreeItem *item )
 
 void wxGenericTreeCtrl::RefreshSelected()
 {
-    if (m_freezeCount) return;
+    if (IsFrozen())
+        return;
 
     // TODO: this is awfully inefficient, we should keep the list of all
     //       selected items internally, should be much faster
@@ -3497,7 +3861,8 @@ void wxGenericTreeCtrl::RefreshSelected()
 
 void wxGenericTreeCtrl::RefreshSelectedUnder(wxGenericTreeItem *item)
 {
-    if (m_freezeCount) return;
+    if (IsFrozen())
+        return;
 
     if ( item->IsSelected() )
         RefreshLine(item);
@@ -3510,19 +3875,14 @@ void wxGenericTreeCtrl::RefreshSelectedUnder(wxGenericTreeItem *item)
     }
 }
 
-void wxGenericTreeCtrl::Freeze()
-{
-    m_freezeCount++;
-}
-
-void wxGenericTreeCtrl::Thaw()
+void wxGenericTreeCtrl::DoThaw()
 {
-    wxCHECK_RET( m_freezeCount > 0, _T("thawing unfrozen tree control?") );
+    wxTreeCtrlBase::DoThaw();
 
-    if ( --m_freezeCount == 0 )
-    {
+    if ( m_dirty )
+        DoDirtyProcessing();
+    else
         Refresh();
-    }
 }
 
 // ----------------------------------------------------------------------------
@@ -3534,8 +3894,6 @@ bool wxGenericTreeCtrl::SetBackgroundColour(const wxColour& colour)
     if ( !wxWindow::SetBackgroundColour(colour) )
         return false;
 
-    if (m_freezeCount) return true;
-
     Refresh();
 
     return true;
@@ -3546,8 +3904,6 @@ bool wxGenericTreeCtrl::SetForegroundColour(const wxColour& colour)
     if ( !wxWindow::SetForegroundColour(colour) )
         return false;
 
-    if (m_freezeCount) return true;
-
     Refresh();
 
     return true;
@@ -3585,18 +3941,47 @@ wxGenericTreeCtrl::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 #endif
 }
 
-#if WXWIN_COMPATIBILITY_2_4
-
-int wxGenericTreeCtrl::GetItemSelectedImage(const wxTreeItemId& item) const
+void wxGenericTreeCtrl::DoDirtyProcessing()
 {
-    return GetItemImage(item, wxTreeItemIcon_Selected);
+    if (IsFrozen())
+        return;
+
+    m_dirty = false;
+
+    CalculatePositions();
+    Refresh();
+    AdjustMyScrollbars();
 }
 
-void wxGenericTreeCtrl::SetItemSelectedImage(const wxTreeItemId& item, int image)
+wxSize wxGenericTreeCtrl::DoGetBestSize() const
 {
-    SetItemImage(item, image, wxTreeItemIcon_Selected);
-}
+    // 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();
 
-#endif // WXWIN_COMPATIBILITY_2_4
+    // 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 size;
+}
 
 #endif // wxUSE_TREECTRL