more wxToolTip changes

[wxWidgets.git] / src / generic / treectrl.cpp

diff --git a/src/generic/treectrl.cpp b/src/generic/treectrl.cpp
index 5c0ada9b1daf55cae7b34b74fac6ef3118edcf07..522b3d9ad370a211732c649a542e1580724241ef 100644 (file)
--- a/src/generic/treectrl.cpp
+++ b/src/generic/treectrl.cpp
@@ -21,18 +21,28 @@
   #pragma implementation "treectrl.h"
 #endif
 
   #pragma implementation "treectrl.h"
 #endif
 

-#include "wx/treectrl.h"
+// For compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"
+
+#ifdef __BORLANDC__
+#pragma hdrstop
+#endif
+
+#include "wx/generic/treectrl.h"
+#include "wx/generic/imaglist.h"

 #include "wx/settings.h"
 #include "wx/log.h"
 #include "wx/intl.h"
 #include "wx/dynarray.h"
 #include "wx/dcclient.h"
 #include "wx/settings.h"
 #include "wx/log.h"
 #include "wx/intl.h"
 #include "wx/dynarray.h"
 #include "wx/dcclient.h"

-#include "wx/imaglist.h"
+#include "wx/msgdlg.h"

 
 // -----------------------------------------------------------------------------
 // array types
 // -----------------------------------------------------------------------------
 
 
 // -----------------------------------------------------------------------------
 // array types
 // -----------------------------------------------------------------------------
 

+class WXDLLEXPORT wxGenericTreeItem;
+

 WX_DEFINE_ARRAY(wxGenericTreeItem *, wxArrayTreeItems);
 
 // -----------------------------------------------------------------------------
 WX_DEFINE_ARRAY(wxGenericTreeItem *, wxArrayTreeItems);
 
 // -----------------------------------------------------------------------------


@@ -68,6 +78,8 @@ public:
 
   void SetHasPlus(bool has = TRUE) { m_hasPlus = has; }
 
 
   void SetHasPlus(bool has = TRUE) { m_hasPlus = has; }
 

+  void SetBold(bool bold) { m_isBold = bold; }
+

   int GetX() const { return m_x; }
   int GetY() const { return m_y; }
 
   int GetX() const { return m_x; }
   int GetY() const { return m_y; }
 


@@ -79,6 +91,10 @@ public:
   wxGenericTreeItem *GetParent() const { return m_parent; }
 
   // operations
   wxGenericTreeItem *GetParent() const { return m_parent; }
 
   // operations

+    // deletes all children notifying the treectrl about it if !NULL pointer
+    // given
+  void DeleteChildren(wxTreeCtrl *tree = NULL);
+    // FIXME don't know what is it for

   void Reset();
 
   // get count of all children (and grand children if 'recursively')
   void Reset();
 
   // get count of all children (and grand children if 'recursively')


@@ -105,6 +121,7 @@ public:
   bool HasHilight()  const { return m_hasHilight; }
   bool IsExpanded()  const { return !m_isCollapsed; }
   bool HasPlus()     const { return m_hasPlus || HasChildren(); }
   bool HasHilight()  const { return m_hasHilight; }
   bool IsExpanded()  const { return !m_isCollapsed; }
   bool HasPlus()     const { return m_hasPlus || HasChildren(); }

+  bool IsBold()      const { return m_isBold; }

 
 private:
   wxString            m_text;
 
 private:
   wxString            m_text;


@@ -114,11 +131,12 @@ private:
 
   wxTreeItemData     *m_data;
 
 
   wxTreeItemData     *m_data;
 

-  // @@ probably should use bitfields to save size
-  bool                m_isCollapsed,
-                      m_hasHilight,   // same as focused
-                      m_hasPlus;      // used for item which doesn't have
-                                      // children but still has a [+] button
+  // 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
+                                        // children but still has a [+] button
+  int                 m_isBold      :1; // render the label in bold font

 
   int                 m_x, m_y;
   long                m_height, m_width;
 
   int                 m_x, m_y;
   long                m_height, m_width;


@@ -136,10 +154,10 @@ private:
 // wxTreeEvent
 // -----------------------------------------------------------------------------
 
 // wxTreeEvent
 // -----------------------------------------------------------------------------
 

-IMPLEMENT_DYNAMIC_CLASS(wxTreeEvent, wxCommandEvent)
+IMPLEMENT_DYNAMIC_CLASS(wxTreeEvent, wxNotifyEvent)

 
 wxTreeEvent::wxTreeEvent( wxEventType commandType, int id )
 
 wxTreeEvent::wxTreeEvent( wxEventType commandType, int id )

-           : wxCommandEvent( commandType, id )
+           : wxNotifyEvent( commandType, id )

 {
   m_code = 0;
   m_itemOld = (wxGenericTreeItem *)NULL;
 {
   m_code = 0;
   m_itemOld = (wxGenericTreeItem *)NULL;


@@ -167,6 +185,7 @@ wxGenericTreeItem::wxGenericTreeItem(wxGenericTreeItem *parent,
   m_isCollapsed = TRUE;
   m_hasHilight = FALSE;
   m_hasPlus = FALSE;
   m_isCollapsed = TRUE;
   m_hasHilight = FALSE;
   m_hasPlus = FALSE;

+  m_isBold = FALSE;

 
   m_parent = parent;
 
 
   m_parent = parent;
 


@@ -177,9 +196,26 @@ wxGenericTreeItem::~wxGenericTreeItem()
 {
   delete m_data;
 
 {
   delete m_data;
 

+  wxASSERT_MSG( m_children.IsEmpty(),
+                "please call DeleteChildren() before deleting the item" );
+}
+
+void wxGenericTreeItem::DeleteChildren(wxTreeCtrl *tree)
+{

   size_t count = m_children.Count();
   for ( size_t n = 0; n < count; n++ )
   size_t count = m_children.Count();
   for ( size_t n = 0; n < count; n++ )

-    delete m_children[n];
+  {
+    wxGenericTreeItem *child = m_children[n];
+    if ( tree )
+    {
+      tree->SendDeleteEvent(child);
+    }
+
+    child->DeleteChildren(tree);
+    delete child;
+  }
+
+  m_children.Empty();

 }
 
 void wxGenericTreeItem::SetText( const wxString &text, wxDC& dc )
 }
 
 void wxGenericTreeItem::SetText( const wxString &text, wxDC& dc )


@@ -202,7 +238,7 @@ void wxGenericTreeItem::Reset()
 
   m_level = 0;
 
 
   m_level = 0;
 

-  m_children.Empty();
+  DeleteChildren();

   m_isCollapsed = TRUE;
 
   m_parent = (wxGenericTreeItem *)NULL;
   m_isCollapsed = TRUE;
 
   m_parent = (wxGenericTreeItem *)NULL;


@@ -259,7 +295,10 @@ wxGenericTreeItem *wxGenericTreeItem::HitTest( const wxPoint& point,
       return this;
     }
 
       return this;
     }
 

-    if ((point.x > m_x) && (point.x < m_x+m_width))
+    int w = m_width;
+    if (m_image != -1) w += 20;
+
+    if ((point.x > m_x) && (point.x < m_x+w))

     {
       onButton = FALSE;
       return this;
     {
       onButton = FALSE;
       return this;


@@ -320,16 +359,22 @@ void wxTreeCtrl::Init()
 
   m_imageListNormal =
   m_imageListState = (wxImageList *) NULL;
 
   m_imageListNormal =
   m_imageListState = (wxImageList *) NULL;

+
+  m_dragCount = 0;

 }
 
 bool wxTreeCtrl::Create(wxWindow *parent, wxWindowID id,
                         const wxPoint& pos, const wxSize& size,
 }
 
 bool wxTreeCtrl::Create(wxWindow *parent, wxWindowID id,
                         const wxPoint& pos, const wxSize& size,

-                        long style, const wxString& name )
+                        long style,
+            const wxValidator &validator,
+            const wxString& name )

 {
   Init();
 
   wxScrolledWindow::Create( parent, id, pos, size, style|wxHSCROLL|wxVSCROLL, name );
 
 {
   Init();
 
   wxScrolledWindow::Create( parent, id, pos, size, style|wxHSCROLL|wxVSCROLL, name );
 

+  SetValidator( validator );
+

   SetBackgroundColour( *wxWHITE );
   m_dottedPen = wxPen( *wxBLACK, 0, 0 );
 
   SetBackgroundColour( *wxWHITE );
   m_dottedPen = wxPen( *wxBLACK, 0, 0 );
 


@@ -339,7 +384,8 @@ bool wxTreeCtrl::Create(wxWindow *parent, wxWindowID id,
 wxTreeCtrl::~wxTreeCtrl()
 {
   wxDELETE( m_hilightBrush );
 wxTreeCtrl::~wxTreeCtrl()
 {
   wxDELETE( m_hilightBrush );

-  wxDELETE( m_anchor );
+
+  DeleteAllItems();

 }
 
 // -----------------------------------------------------------------------------
 }
 
 // -----------------------------------------------------------------------------


@@ -432,6 +478,19 @@ void wxTreeCtrl::SetItemHasChildren(const wxTreeItemId& item, bool has)
   item.m_pItem->SetHasPlus(has);
 }
 
   item.m_pItem->SetHasPlus(has);
 }
 

+void wxTreeCtrl::SetItemBold(const wxTreeItemId& item, bool bold)
+{
+  wxCHECK_RET( item.IsOk(), "invalid tree item" );
+
+  // avoid redrawing the tree if no real change
+  wxGenericTreeItem *pItem = item.m_pItem;
+  if ( pItem->IsBold() != bold )
+  {
+    pItem->SetBold(bold);
+    RefreshLine(pItem);
+  }
+}
+

 // -----------------------------------------------------------------------------
 // item status inquiries
 // -----------------------------------------------------------------------------
 // -----------------------------------------------------------------------------
 // item status inquiries
 // -----------------------------------------------------------------------------


@@ -464,20 +523,27 @@ bool wxTreeCtrl::IsSelected(const wxTreeItemId& item) const
   return item.m_pItem->HasHilight();
 }
 
   return item.m_pItem->HasHilight();
 }
 

+bool wxTreeCtrl::IsBold(const wxTreeItemId& item) const
+{
+  wxCHECK_MSG( item.IsOk(), FALSE, "invalid tree item" );
+
+  return item.m_pItem->IsBold();
+}
+

 // -----------------------------------------------------------------------------
 // navigation
 // -----------------------------------------------------------------------------
 
 wxTreeItemId wxTreeCtrl::GetParent(const wxTreeItemId& item) const
 {
 // -----------------------------------------------------------------------------
 // navigation
 // -----------------------------------------------------------------------------
 
 wxTreeItemId wxTreeCtrl::GetParent(const wxTreeItemId& item) const
 {

-  wxCHECK_MSG( item.IsOk(), NULL, "invalid tree item" );
+  wxCHECK_MSG( item.IsOk(), wxTreeItemId(), "invalid tree item" );

 
   return item.m_pItem->GetParent();
 }
 
 wxTreeItemId wxTreeCtrl::GetFirstChild(const wxTreeItemId& item, long& cookie) const
 {
 
   return item.m_pItem->GetParent();
 }
 
 wxTreeItemId wxTreeCtrl::GetFirstChild(const wxTreeItemId& item, long& cookie) const
 {

-  wxCHECK_MSG( item.IsOk(), NULL, "invalid tree item" );
+  wxCHECK_MSG( item.IsOk(), wxTreeItemId(), "invalid tree item" );

 
   cookie = 0;
   return GetNextChild(item, cookie);
 
   cookie = 0;
   return GetNextChild(item, cookie);


@@ -485,82 +551,91 @@ wxTreeItemId wxTreeCtrl::GetFirstChild(const wxTreeItemId& item, long& cookie) c
 
 wxTreeItemId wxTreeCtrl::GetNextChild(const wxTreeItemId& item, long& cookie) const
 {
 
 wxTreeItemId wxTreeCtrl::GetNextChild(const wxTreeItemId& item, long& cookie) const
 {

-  wxCHECK_MSG( item.IsOk(), NULL, "invalid tree item" );
+  wxCHECK_MSG( item.IsOk(), wxTreeItemId(), "invalid tree item" );

 
   wxArrayTreeItems& children = item.m_pItem->GetChildren();
   if ( (size_t)cookie < children.Count() )
   {
 
   wxArrayTreeItems& children = item.m_pItem->GetChildren();
   if ( (size_t)cookie < children.Count() )
   {

-    return item.m_pItem->GetChildren().Item(cookie++);
+    return children.Item(cookie++);

   }
   else
   {
     // there are no more of them
   }
   else
   {
     // there are no more of them

-    return NULL;
+    return wxTreeItemId();

   }
 }
 
   }
 }
 

+wxTreeItemId wxTreeCtrl::GetLastChild(const wxTreeItemId& item) const
+{
+  wxCHECK_MSG( item.IsOk(), wxTreeItemId(), "invalid tree item" );
+
+  wxArrayTreeItems& children = item.m_pItem->GetChildren();
+  return (children.IsEmpty() ? wxTreeItemId() : wxTreeItemId(children.Last()));
+}
+

 wxTreeItemId wxTreeCtrl::GetNextSibling(const wxTreeItemId& item) const
 {
 wxTreeItemId wxTreeCtrl::GetNextSibling(const wxTreeItemId& item) const
 {

-  wxCHECK_MSG( item.IsOk(), NULL, "invalid tree item" );
+  wxCHECK_MSG( item.IsOk(), wxTreeItemId(), "invalid tree item" );

 
   wxGenericTreeItem *i = item.m_pItem;
   wxGenericTreeItem *parent = i->GetParent();
   if ( parent == NULL )
   {
     // root item doesn't have any siblings
 
   wxGenericTreeItem *i = item.m_pItem;
   wxGenericTreeItem *parent = i->GetParent();
   if ( parent == NULL )
   {
     // root item doesn't have any siblings

-    return NULL;
+    return wxTreeItemId();

   }
 
   wxArrayTreeItems& siblings = parent->GetChildren();
   int index = siblings.Index(i);
   }
 
   wxArrayTreeItems& siblings = parent->GetChildren();
   int index = siblings.Index(i);

-  wxASSERT( index != NOT_FOUND ); // I'm not a child of my parent?
+  wxASSERT( index != wxNOT_FOUND ); // I'm not a child of my parent?

 
   size_t n = (size_t)(index + 1);
 
   size_t n = (size_t)(index + 1);

-  return n == siblings.Count() ? (wxGenericTreeItem*)NULL : siblings[n];
+  return n == siblings.Count() ? wxTreeItemId() : wxTreeItemId(siblings[n]);

 }
 
 wxTreeItemId wxTreeCtrl::GetPrevSibling(const wxTreeItemId& item) const
 {
 }
 
 wxTreeItemId wxTreeCtrl::GetPrevSibling(const wxTreeItemId& item) const
 {

-  wxCHECK_MSG( item.IsOk(), NULL, "invalid tree item" );
+  wxCHECK_MSG( item.IsOk(), wxTreeItemId(), "invalid tree item" );

 
   wxGenericTreeItem *i = item.m_pItem;
   wxGenericTreeItem *parent = i->GetParent();
   if ( parent == NULL )
   {
     // root item doesn't have any siblings
 
   wxGenericTreeItem *i = item.m_pItem;
   wxGenericTreeItem *parent = i->GetParent();
   if ( parent == NULL )
   {
     // root item doesn't have any siblings

-    return NULL;
+    return wxTreeItemId();

   }
 
   wxArrayTreeItems& siblings = parent->GetChildren();
   int index = siblings.Index(i);
   }
 
   wxArrayTreeItems& siblings = parent->GetChildren();
   int index = siblings.Index(i);

-  wxASSERT( index != NOT_FOUND ); // I'm not a child of my parent?
+  wxASSERT( index != wxNOT_FOUND ); // I'm not a child of my parent?

 
 

-  return index == 0 ? (wxGenericTreeItem*)NULL : siblings[(size_t)(index - 1)];
+  return index == 0 ? wxTreeItemId()
+                    : wxTreeItemId(siblings[(size_t)(index - 1)]);

 }
 
 wxTreeItemId wxTreeCtrl::GetFirstVisibleItem() const
 {
   wxFAIL_MSG("not implemented");
 
 }
 
 wxTreeItemId wxTreeCtrl::GetFirstVisibleItem() const
 {
   wxFAIL_MSG("not implemented");
 

-  return NULL;
+  return wxTreeItemId();

 }
 
 wxTreeItemId wxTreeCtrl::GetNextVisible(const wxTreeItemId& item) const
 {
 }
 
 wxTreeItemId wxTreeCtrl::GetNextVisible(const wxTreeItemId& item) const
 {

-  wxCHECK_MSG( item.IsOk(), NULL, "invalid tree item" );
+  wxCHECK_MSG( item.IsOk(), wxTreeItemId(), "invalid tree item" );

 
   wxFAIL_MSG("not implemented");
 
 
   wxFAIL_MSG("not implemented");
 

-  return NULL;
+  return wxTreeItemId();

 }
 
 wxTreeItemId wxTreeCtrl::GetPrevVisible(const wxTreeItemId& item) const
 {
 }
 
 wxTreeItemId wxTreeCtrl::GetPrevVisible(const wxTreeItemId& item) const
 {

-  wxCHECK_MSG( item.IsOk(), NULL, "invalid tree item" );
+  wxCHECK_MSG( item.IsOk(), wxTreeItemId(), "invalid tree item" );

 
   wxFAIL_MSG("not implemented");
 
 
   wxFAIL_MSG("not implemented");
 

-  return NULL;
+  return wxTreeItemId();

 }
 
 // -----------------------------------------------------------------------------
 }
 
 // -----------------------------------------------------------------------------


@@ -592,7 +667,7 @@ wxTreeItemId wxTreeCtrl::DoInsertItem(const wxTreeItemId& parentId,
   }
 
   parent->Insert( item, previous );
   }
 
   parent->Insert( item, previous );

-  
+

   m_dirty = TRUE;
 
   return item;
   m_dirty = TRUE;
 
   return item;


@@ -602,7 +677,7 @@ wxTreeItemId wxTreeCtrl::AddRoot(const wxString& text,
                                  int image, int selImage,
                                  wxTreeItemData *data)
 {
                                  int image, int selImage,
                                  wxTreeItemData *data)
 {

-  wxCHECK_MSG( !m_anchor, NULL, "tree can have only one root" );
+  wxCHECK_MSG( !m_anchor, wxTreeItemId(), "tree can have only one root" );

 
   wxClientDC dc(this);
   m_anchor = new wxGenericTreeItem((wxGenericTreeItem *)NULL, text, dc,
 
   wxClientDC dc(this);
   m_anchor = new wxGenericTreeItem((wxGenericTreeItem *)NULL, text, dc,


@@ -640,7 +715,7 @@ wxTreeItemId wxTreeCtrl::InsertItem(const wxTreeItemId& parentId,
   }
 
   int index = parent->GetChildren().Index(idPrevious.m_pItem);
   }
 
   int index = parent->GetChildren().Index(idPrevious.m_pItem);

-  wxASSERT_MSG( index != NOT_FOUND,
+  wxASSERT_MSG( index != wxNOT_FOUND,

                 "previous item in wxTreeCtrl::InsertItem() is not a sibling" );
   return DoInsertItem(parentId, (size_t)index, text, image, selImage, data);
 }
                 "previous item in wxTreeCtrl::InsertItem() is not a sibling" );
   return DoInsertItem(parentId, (size_t)index, text, image, selImage, data);
 }


@@ -661,6 +736,22 @@ wxTreeItemId wxTreeCtrl::AppendItem(const wxTreeItemId& parentId,
                       image, selImage, data);
 }
 
                       image, selImage, data);
 }
 

+void wxTreeCtrl::SendDeleteEvent(wxGenericTreeItem *item)
+{
+  wxTreeEvent event( wxEVT_COMMAND_TREE_DELETE_ITEM, GetId() );
+  event.m_item = item;
+  event.SetEventObject( this );
+  ProcessEvent( event );
+}
+
+void wxTreeCtrl::DeleteChildren(const wxTreeItemId& itemId)
+{
+    wxGenericTreeItem *item = itemId.m_pItem;
+    item->DeleteChildren(this);
+
+    m_dirty = TRUE;
+}
+

 void wxTreeCtrl::Delete(const wxTreeItemId& itemId)
 {
   wxGenericTreeItem *item = itemId.m_pItem;
 void wxTreeCtrl::Delete(const wxTreeItemId& itemId)
 {
   wxGenericTreeItem *item = itemId.m_pItem;


@@ -671,19 +762,23 @@ void wxTreeCtrl::Delete(const wxTreeItemId& itemId)
     parent->GetChildren().Remove(item);
   }
 
     parent->GetChildren().Remove(item);
   }
 

+  item->DeleteChildren(this);
+  SendDeleteEvent(item);

   delete item;
 
   delete item;
 

-  Refresh();
+  m_dirty = TRUE;

 }
 
 void wxTreeCtrl::DeleteAllItems()
 {
   if ( m_anchor )
   {
 }
 
 void wxTreeCtrl::DeleteAllItems()
 {
   if ( m_anchor )
   {

+    m_anchor->DeleteChildren(this);

     delete m_anchor;
     delete m_anchor;

+

     m_anchor = NULL;
 
     m_anchor = NULL;
 

-    Refresh();
+    m_dirty = TRUE;

   }
 }
 
   }
 }
 


@@ -691,6 +786,9 @@ void wxTreeCtrl::Expand(const wxTreeItemId& itemId)
 {
   wxGenericTreeItem *item = itemId.m_pItem;
 
 {
   wxGenericTreeItem *item = itemId.m_pItem;
 

+  if ( !item->HasPlus() )
+    return;
+

   if ( item->IsExpanded() )
     return;
 
   if ( item->IsExpanded() )
     return;
 


@@ -704,6 +802,7 @@ void wxTreeCtrl::Expand(const wxTreeItemId& itemId)
   }
 
   item->Expand();
   }
 
   item->Expand();

+  CalculatePositions();

 
   RefreshSubtree(item);
 
 
   RefreshSubtree(item);
 


@@ -747,7 +846,7 @@ void wxTreeCtrl::Collapse(const wxTreeItemId& itemId)
 void wxTreeCtrl::CollapseAndReset(const wxTreeItemId& item)
 {
   Collapse(item);
 void wxTreeCtrl::CollapseAndReset(const wxTreeItemId& item)
 {
   Collapse(item);

-  Delete(item);
+  DeleteChildren(item);

 }
 
 void wxTreeCtrl::Toggle(const wxTreeItemId& itemId)
 }
 
 void wxTreeCtrl::Toggle(const wxTreeItemId& itemId)


@@ -799,71 +898,103 @@ void wxTreeCtrl::SelectItem(const wxTreeItemId& itemId)
 
 void wxTreeCtrl::EnsureVisible(const wxTreeItemId& item)
 {
 
 void wxTreeCtrl::EnsureVisible(const wxTreeItemId& item)
 {

-  wxGenericTreeItem *gitem = item.m_pItem;
-  
-  int item_y = gitem->GetY();
-  
-  int start_x = 0;
-  int start_y = 0;
-  ViewStart( &start_x, &start_y );
-  start_y *= 10;
-  
-  if (item_y < start_y+3)
-  {
-    int x = 0;
-    int y = 0;
-    m_anchor->GetSize( x, y );
-    y += 2*m_lineHeight;
-    int x_pos = GetScrollPos( wxHORIZONTAL );
-    SetScrollbars( 10, 10, x/10, y/10, x_pos, item_y/10 );
-    return;
-  }
-  
-  int w = 0;
-  int h = 0;
-  GetClientSize( &w, &h );
-  
-  if (item_y > start_y+h-26)
-  {
-    int x = 0;
-    int y = 0;
-    m_anchor->GetSize( x, y );
-    y += 2*m_lineHeight;
-    int x_pos = GetScrollPos( wxHORIZONTAL );
-    SetScrollbars( 10, 10, x/10, y/10, x_pos, (item_y-h+30)/10 );
-     return;
-  }  
+    wxGenericTreeItem *gitem = item.m_pItem;
+
+    int item_y = gitem->GetY();
+
+    int start_x = 0;
+    int start_y = 0;
+    ViewStart( &start_x, &start_y );
+    start_y *= 10;
+
+    int client_h = 0;
+    int client_w = 0;
+    GetClientSize( &client_w, &client_h );
+
+    if (item_y < start_y+3)
+    {
+        int x = 0;
+        int y = 0;
+        m_anchor->GetSize( x, y );
+        y += 2*m_lineHeight;
+        int x_pos = GetScrollPos( wxHORIZONTAL );
+    SetScrollbars( 10, 10, x/10, y/10, x_pos, (item_y-client_h/2)/10 );
+        return;
+    }
+
+    if (item_y > start_y+client_h-16)
+    {
+       int x = 0;
+       int y = 0;
+       m_anchor->GetSize( x, y );
+       y += 2*m_lineHeight;
+       int x_pos = GetScrollPos( wxHORIZONTAL );
+       SetScrollbars( 10, 10, x/10, y/10, x_pos, (item_y-client_h/2)/10 );
+       return;
+    }

 }
 
 void wxTreeCtrl::ScrollTo(const wxTreeItemId& WXUNUSED(item))
 {
 }
 
 void wxTreeCtrl::ScrollTo(const wxTreeItemId& WXUNUSED(item))
 {

-  wxFAIL_MSG("not implemented");
+    wxFAIL_MSG("not implemented");

 }
 
 wxTextCtrl *wxTreeCtrl::EditLabel( const wxTreeItemId& WXUNUSED(item),
                                    wxClassInfo* WXUNUSED(textCtrlClass) )
 {
 }
 
 wxTextCtrl *wxTreeCtrl::EditLabel( const wxTreeItemId& WXUNUSED(item),
                                    wxClassInfo* WXUNUSED(textCtrlClass) )
 {

-  wxFAIL_MSG("not implemented");
+    wxFAIL_MSG("not implemented");

 
 

-  return NULL;
+    return (wxTextCtrl*)NULL;

 }
 
 wxTextCtrl *wxTreeCtrl::GetEditControl() const
 {
 }
 
 wxTextCtrl *wxTreeCtrl::GetEditControl() const
 {

-  wxFAIL_MSG("not implemented");
+    wxFAIL_MSG("not implemented");

 
 

-  return NULL;
+    return (wxTextCtrl*)NULL;

 }
 
 void wxTreeCtrl::EndEditLabel(const wxTreeItemId& WXUNUSED(item), bool WXUNUSED(discardChanges))
 {
 }
 
 void wxTreeCtrl::EndEditLabel(const wxTreeItemId& WXUNUSED(item), bool WXUNUSED(discardChanges))
 {

-  wxFAIL_MSG("not implemented");
+    wxFAIL_MSG("not implemented");

 }
 
 }
 

-void wxTreeCtrl::SortChildren( const wxTreeItemId& WXUNUSED(item),
-                               wxTreeItemCmpFunc *WXUNUSED(cmpFunction))
+// FIXME: tree sorting functions are not reentrant and not MT-safe!
+static wxTreeCtrl *s_treeBeingSorted = NULL;
+
+static int tree_ctrl_compare_func(wxGenericTreeItem **item1,
+                                  wxGenericTreeItem **item2)

 {
 {

-  wxFAIL_MSG("not implemented");
+    wxCHECK_MSG( s_treeBeingSorted, 0, "bug in wxTreeCtrl::SortChildren()" );
+
+    return s_treeBeingSorted->OnCompareItems(*item1, *item2);
+}
+
+int wxTreeCtrl::OnCompareItems(const wxTreeItemId& item1,
+                               const wxTreeItemId& item2)
+{
+    return strcmp(GetItemText(item1), GetItemText(item2));
+}
+
+void wxTreeCtrl::SortChildren(const wxTreeItemId& itemId)
+{
+    wxCHECK_RET( itemId.IsOk(), "invalid tree item" );
+
+    wxGenericTreeItem *item = itemId.m_pItem;
+
+    wxCHECK_RET( !s_treeBeingSorted,
+                 "wxTreeCtrl::SortChildren is not reentrant" );
+
+    wxArrayTreeItems& children = item->GetChildren();
+    if ( children.Count() > 1 )
+    {
+        s_treeBeingSorted = this;
+        children.Sort(tree_ctrl_compare_func);
+        s_treeBeingSorted = NULL;
+
+        m_dirty = TRUE;
+    }
+    //else: don't make the tree dirty as nothing changed

 }
 
 wxImageList *wxTreeCtrl::GetImageList() const
 }
 
 wxImageList *wxTreeCtrl::GetImageList() const


@@ -889,144 +1020,181 @@ void wxTreeCtrl::SetStateImageList(wxImageList *imageList)
 // -----------------------------------------------------------------------------
 // helpers
 // -----------------------------------------------------------------------------
 // -----------------------------------------------------------------------------
 // helpers
 // -----------------------------------------------------------------------------

+

 void wxTreeCtrl::AdjustMyScrollbars()
 {
 void wxTreeCtrl::AdjustMyScrollbars()
 {

-  if (m_anchor)
-  {
-    int x = 0;
-    int y = 0;
-    m_anchor->GetSize( x, y );
-    y += 2*m_lineHeight;
-    int x_pos = GetScrollPos( wxHORIZONTAL );
-    int y_pos = GetScrollPos( wxVERTICAL );
-    SetScrollbars( 10, 10, x/10, y/10, x_pos, y_pos );
-  }
-  else
-  {
-    SetScrollbars( 0, 0, 0, 0 );
-  }
+    if (m_anchor)
+    {
+        int x = 0;
+        int y = 0;
+        m_anchor->GetSize( x, y );
+        y += 2*m_lineHeight;
+        int x_pos = GetScrollPos( wxHORIZONTAL );
+        int y_pos = GetScrollPos( wxVERTICAL );
+        SetScrollbars( 10, 10, x/10, y/10, x_pos, y_pos );
+    }
+    else
+    {
+        SetScrollbars( 0, 0, 0, 0 );
+    }

 }
 
 }
 

-void wxTreeCtrl::PaintLevel( wxGenericTreeItem *item, wxDC &dc, int level, int &y )
+void wxTreeCtrl::PaintItem(wxGenericTreeItem *item, wxDC& dc)

 {
 {

-  int horizX = level*m_indent;
-
-  item->SetX( horizX+33 );
-  item->SetY( y-m_lineHeight/3 );
-  item->SetHeight( m_lineHeight );
+    /* render bold items in bold */
+    wxFont fontOld;
+    wxFont fontNew;

 
 

-  item->SetCross( horizX+15, y );
-
-  int oldY = y;
-
-  int exposed_x = dc.LogicalToDeviceX( 0 );
-  int exposed_y = dc.LogicalToDeviceY( item->GetY()-2 );
-
-  if (IsExposed( exposed_x, exposed_y, 10000, m_lineHeight+4 ))  // 10000 = very much
-  {
-    int startX = horizX;
-    int endX = horizX + 10;
-
-    if (!item->HasChildren()) endX += 20;
+    if (item->IsBold())
+    {
+        fontOld = dc.GetFont();
+        if (fontOld.Ok())
+        {
+          /* @@ is there any better way to make a bold variant of old font? */
+          fontNew = wxFont( fontOld.GetPointSize(),
+                            fontOld.GetFamily(),
+                            fontOld.GetStyle(),
+                            wxBOLD,
+                            fontOld.GetUnderlined());
+          dc.SetFont(fontNew);
+        }
+        else
+        {
+            wxFAIL_MSG("wxDC::GetFont() failed!");
+        }
+    }

 
 

-    dc.DrawLine( startX, y, endX, y );
+    long text_w = 0;
+    long text_h = 0;
+    dc.GetTextExtent( item->GetText(), &text_w, &text_h );

 
 

-    if (item->HasPlus())
+    int image_h = 0;
+    int image_w = 0;
+    if ((item->IsExpanded()) && (item->GetSelectedImage() != -1))

     {
     {

-      dc.DrawLine( horizX+20, y, horizX+30, y );
-      dc.SetPen( *wxGREY_PEN );
-      dc.DrawRectangle( horizX+10, y-4, 11, 9 );
-      dc.SetPen( *wxBLACK_PEN );
-      dc.DrawLine( horizX+13, y, horizX+18, y );
-
-      if (!item->IsExpanded())
-        dc.DrawLine( horizX+15, y-2, horizX+15, y+3 );
+        m_imageListNormal->GetSize( item->GetSelectedImage(), image_w, image_h );
+        image_w += 4;

     }
     }

-
-    if (item->HasHilight())
+    else if (item->GetImage() != -1)

     {
     {

-      dc.SetTextForeground( wxSystemSettings::GetSystemColour( wxSYS_COLOUR_HIGHLIGHTTEXT ) );
-
-      dc.SetBrush( *m_hilightBrush );
-
-      long text_w = 0;
-      long text_h = 0;
-      dc.GetTextExtent( item->GetText(), &text_w, &text_h );
-
-      int image_h = 0;
-      int image_w = 0;
-      if (item->GetImage() != -1)
-      {

         m_imageListNormal->GetSize( item->GetImage(), image_w, image_h );
         image_w += 4;
         m_imageListNormal->GetSize( item->GetImage(), image_w, image_h );
         image_w += 4;

-      }
-
-      if (m_hasFocus)
-        dc.SetPen( *wxBLACK_PEN );
-      else
-        dc.SetPen( *wxTRANSPARENT_PEN );
+    }

 
 

-      dc.DrawRectangle( item->GetX()-2, item->GetY()-2, image_w+text_w+4, text_h+4 );
+    dc.DrawRectangle( item->GetX()-2, item->GetY()-2, image_w+text_w+4, text_h+4 );

 
 

-      if (item->GetImage() != -1)
-      {
+    if ((item->IsExpanded()) && (item->GetSelectedImage() != -1))
+    {

         dc.SetClippingRegion( item->GetX(), item->GetY(), image_w-2, text_h );
         dc.SetClippingRegion( item->GetX(), item->GetY(), image_w-2, text_h );

-       m_imageListNormal->Draw( item->GetImage(), dc, item->GetX(), item->GetY()-1, wxIMAGELIST_DRAW_TRANSPARENT );
+        m_imageListNormal->Draw( item->GetSelectedImage(), dc,
+                                 item->GetX(), item->GetY()-1,
+                                 wxIMAGELIST_DRAW_TRANSPARENT );

         dc.DestroyClippingRegion();
         dc.DestroyClippingRegion();

-      }
-      dc.DrawText( item->GetText(), image_w+item->GetX(), item->GetY() );
-
-      dc.SetPen( *wxBLACK_PEN );
-      dc.SetTextForeground( *wxBLACK );
-      dc.SetBrush( *wxWHITE_BRUSH );

     }
     }

-    else
+    else if (item->GetImage() != -1)

     {
     {

-      dc.SetBrush( *wxWHITE_BRUSH );
-      dc.SetPen( *wxTRANSPARENT_PEN );
-
-      long text_w = 0;
-      long text_h = 0;
-      dc.GetTextExtent( item->GetText(), &text_w, &text_h );
-
-      int image_h = 0;
-      int image_w = 0;
-      if (item->GetImage() != -1)
-      {
-        m_imageListNormal->GetSize( item->GetImage(), image_w, image_h );
-        image_w += 4;
-      }
-
-      dc.DrawRectangle( item->GetX()-2, item->GetY()-2, image_w+text_w+4, text_h+4 );
-
-      if (item->GetImage() != -1)
-      {

         dc.SetClippingRegion( item->GetX(), item->GetY(), image_w-2, text_h );
         dc.SetClippingRegion( item->GetX(), item->GetY(), image_w-2, text_h );

-       m_imageListNormal->Draw( item->GetImage(), dc, item->GetX(), item->GetY()-1, wxIMAGELIST_DRAW_TRANSPARENT );
+        m_imageListNormal->Draw( item->GetImage(), dc,
+                                 item->GetX(), item->GetY()-1,
+                                 wxIMAGELIST_DRAW_TRANSPARENT );

         dc.DestroyClippingRegion();
         dc.DestroyClippingRegion();

-      }
+    }
+
+    dc.SetBackgroundMode(wxTRANSPARENT);
+    dc.DrawText( item->GetText(), image_w + item->GetX(), item->GetY() );

 
 

-      dc.DrawText( item->GetText(), image_w+item->GetX(), item->GetY() );
-      dc.SetPen( *wxBLACK_PEN );
+    /* restore normal font for bold items */
+    if (fontOld.Ok())
+    {
+        dc.SetFont( fontOld);

     }
     }

-  }
+}

 
 

-  if ( !item->IsExpanded() )
-    return;
+void wxTreeCtrl::PaintLevel( wxGenericTreeItem *item, wxDC &dc, int level, int &y )
+{
+    int horizX = level*m_indent;

 
 

-  int semiOldY = y;
+    item->SetX( horizX+33 );
+    item->SetY( y-m_lineHeight/3 );
+    item->SetHeight( m_lineHeight );

 
 

-  wxArrayTreeItems& children = item->GetChildren();
-  size_t count = children.Count();
-  for ( size_t n = 0; n < count; n++ )
-  {
-    y += m_lineHeight;
-    semiOldY = y;
+    item->SetCross( horizX+15, y );

 
 

-    PaintLevel( children[n], dc, level+1, y );
-  }
+    int oldY = y;
+
+    int exposed_x = dc.LogicalToDeviceX( 0 );
+    int exposed_y = dc.LogicalToDeviceY( item->GetY()-2 );

 
 

-  dc.DrawLine( horizX+15, oldY+5, horizX+15, semiOldY );
+    if (IsExposed( exposed_x, exposed_y, 10000, m_lineHeight+4 ))  // 10000 = very much
+    {
+        int startX = horizX;
+        int endX = horizX + 10;
+
+        if (!item->HasChildren()) endX += 20;
+
+        dc.DrawLine( startX, y, endX, y );
+
+        if (item->HasPlus())
+        {
+            dc.DrawLine( horizX+20, y, horizX+30, y );
+            dc.SetPen( *wxGREY_PEN );
+            dc.SetBrush( *wxWHITE_BRUSH );
+            dc.DrawRectangle( horizX+10, y-4, 11, 9 );
+            dc.SetPen( *wxBLACK_PEN );
+            dc.DrawLine( horizX+13, y, horizX+18, y );
+
+            if (!item->IsExpanded())
+        {
+                dc.DrawLine( horizX+15, y-2, horizX+15, y+3 );
+        }
+        }
+
+        if (item->HasHilight())
+        {
+            dc.SetTextForeground( wxSystemSettings::GetSystemColour( wxSYS_COLOUR_HIGHLIGHTTEXT ) );
+
+            dc.SetBrush( *m_hilightBrush );
+
+            if (m_hasFocus)
+                dc.SetPen( *wxBLACK_PEN );
+            else
+                dc.SetPen( *wxTRANSPARENT_PEN );
+
+            PaintItem(item, dc);
+
+            dc.SetPen( *wxBLACK_PEN );
+            dc.SetTextForeground( *wxBLACK );
+            dc.SetBrush( *wxWHITE_BRUSH );
+        }
+        else
+        {
+            dc.SetBrush( *wxWHITE_BRUSH );
+            dc.SetPen( *wxTRANSPARENT_PEN );
+
+            PaintItem(item, dc);
+
+            dc.SetPen( *wxBLACK_PEN );
+        }
+    }
+
+    if (item->IsExpanded())
+    {
+        int semiOldY = y;
+
+        wxArrayTreeItems& children = item->GetChildren();
+        size_t count = children.Count();
+        for ( size_t n = 0; n < count; n++ )
+        {
+            y += m_lineHeight;
+            semiOldY = y;
+            PaintLevel( children[n], dc, level+1, y );
+        }
+
+        /* it may happen that the item is expanded but has no items (when you
+         * delete all its children for example) - don't draw the vertical line
+         * in this case */
+        if (count > 0) dc.DrawLine( horizX+15, oldY+5, horizX+15, semiOldY );
+    }

 }
 
 // -----------------------------------------------------------------------------
 }
 
 // -----------------------------------------------------------------------------


@@ -1035,243 +1203,352 @@ void wxTreeCtrl::PaintLevel( wxGenericTreeItem *item, wxDC &dc, int level, int &
 
 void wxTreeCtrl::OnPaint( wxPaintEvent &WXUNUSED(event) )
 {
 
 void wxTreeCtrl::OnPaint( wxPaintEvent &WXUNUSED(event) )
 {

-  if ( !m_anchor )
-    return;
+    if ( !m_anchor )
+        return;

 
 

-  wxPaintDC dc(this);
-  PrepareDC( dc );
+    wxPaintDC dc(this);
+    PrepareDC( dc );

 
 

-  dc.SetFont( wxSystemSettings::GetSystemFont( wxSYS_SYSTEM_FONT ) );
+    dc.SetFont( wxSystemSettings::GetSystemFont( wxSYS_DEFAULT_GUI_FONT ) );

 
 

-  dc.SetPen( m_dottedPen );
-  m_lineHeight = (int)(dc.GetCharHeight() + 4);
+    dc.SetPen( m_dottedPen );
+    m_lineHeight = (int)(dc.GetCharHeight() + 4);

 
 

-  int y = m_lineHeight / 2 + 2;
-  PaintLevel( m_anchor, dc, 0, y );
+    int y = m_lineHeight / 2 + 2;
+    PaintLevel( m_anchor, dc, 0, y );

 }
 
 void wxTreeCtrl::OnSetFocus( wxFocusEvent &WXUNUSED(event) )
 {
 }
 
 void wxTreeCtrl::OnSetFocus( wxFocusEvent &WXUNUSED(event) )
 {

-  m_hasFocus = TRUE;
-  if ( m_current )
-    RefreshLine( m_current );
+    m_hasFocus = TRUE;
+
+    if (m_current) RefreshLine( m_current );

 }
 
 void wxTreeCtrl::OnKillFocus( wxFocusEvent &WXUNUSED(event) )
 {
 }
 
 void wxTreeCtrl::OnKillFocus( wxFocusEvent &WXUNUSED(event) )
 {

-  m_hasFocus = FALSE;
-  if ( m_current )
-    RefreshLine( m_current );
+    m_hasFocus = FALSE;
+
+    if (m_current) RefreshLine( m_current );

 }
 
 void wxTreeCtrl::OnChar( wxKeyEvent &event )
 {
 }
 
 void wxTreeCtrl::OnChar( wxKeyEvent &event )
 {

-  if (m_current == 0)
-  { 
-     event.Skip();
-     return;
-  }
-  
-  switch (event.KeyCode())
-  {
-    case '+':
-    case WXK_ADD:
-    {
-      if (HasChildren(m_current) && !IsExpanded(m_current))
-      {
-        Expand(m_current);
-      }
-      return;
-    }
-    case '-':
-    case WXK_SUBTRACT:
-    {
-      if (IsExpanded(m_current))
-      {
-        Collapse(m_current);
-      }
-      return;
-    }
-    case ' ':
-    case WXK_RETURN:
-    {
-      wxTreeEvent event( wxEVT_COMMAND_TREE_KEY_DOWN, GetId() );
-      event.m_item = m_current;
-      event.m_code = 0;
-      event.SetEventObject( this );
-      GetEventHandler()->ProcessEvent( event );
-      return;
-    }
-    case WXK_UP:
+    wxTreeEvent te( wxEVT_COMMAND_TREE_KEY_DOWN, GetId() );
+    te.m_code = event.KeyCode();
+    te.SetEventObject( this );
+    GetEventHandler()->ProcessEvent( te );
+
+    if (m_current == 0)

     {
     {

-       wxTreeItemId prev = GetPrevSibling( m_current );
-       if (prev != 0)
-       { 
-         SelectItem( prev );
-          EnsureVisible( prev );
-       }
-       else
-       {
-         prev = GetParent( m_current );
-        if (prev)
-        {
-          EnsureVisible( prev );
-          SelectItem( prev );
-        }
-       }
-      return;
+        event.Skip();
+        return;

     }
     }

-    case WXK_DOWN:
+
+    switch (event.KeyCode())

     {
     {

-      if (IsExpanded(m_current))
-      {
-        long cookie = 0;
-       wxTreeItemId child = GetFirstChild( m_current, cookie );
-       SelectItem( child );
-       EnsureVisible( child );
-      }
-      else
-      {
-       wxTreeItemId next = GetNextSibling( m_current );
-       if (next == 0)
-       {
-         wxTreeItemId current = m_current;
-         while (current && !next)
-         {
-           current = GetParent( current );
-           if (current) next = GetNextSibling( current );
-         }
-       }
-       if (next != 0)
-       {
-          SelectItem( next );
-          EnsureVisible( next );
-       }
-      }
-      return;
+        case '+':
+        case WXK_ADD:
+            if (m_current->HasPlus() && !IsExpanded(m_current))
+            {
+                Expand(m_current);
+            }
+            break;
+
+        case '-':
+        case WXK_SUBTRACT:
+            if (IsExpanded(m_current))
+            {
+                Collapse(m_current);
+            }
+            break;
+
+        case '*':
+        case WXK_MULTIPLY:
+            Toggle(m_current);
+            break;
+
+        case ' ':
+        case WXK_RETURN:
+            {
+                wxTreeEvent event( wxEVT_COMMAND_TREE_ITEM_ACTIVATED, GetId() );
+                event.m_item = m_current;
+                event.m_code = 0;
+                event.SetEventObject( this );
+                GetEventHandler()->ProcessEvent( event );
+            }
+            break;
+
+            // up goes to the previous sibling or to the last of its children if
+            // it's expanded
+        case WXK_UP:
+            {
+                wxTreeItemId prev = GetPrevSibling( m_current );
+                if (!prev)
+                {
+                    prev = GetParent( m_current );
+                    long cockie = 0;
+                    wxTreeItemId current = m_current;
+                    if (current == GetFirstChild( prev, cockie ))
+                    {
+                        // otherwise we return to where we came from
+                        SelectItem( prev );
+                        EnsureVisible( prev );
+                        break;
+                    }
+                }
+                if (prev)
+                {
+                    while (IsExpanded(prev))
+                    {
+                        int c = (int)GetChildrenCount( prev, FALSE );
+                        long cockie = 0;
+                        prev = GetFirstChild( prev, cockie );
+                        for (int i = 0; i < c-1; i++)
+                            prev = GetNextSibling( prev );
+                    }
+                    SelectItem( prev );
+                    EnsureVisible( prev );
+                }
+            }
+            break;
+
+            // left arrow goes to the parent
+        case WXK_LEFT:
+            {
+                wxTreeItemId prev = GetParent( m_current );
+                if (prev)
+                {
+                    EnsureVisible( prev );
+                    SelectItem( prev );
+                }
+            }
+            break;
+
+        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);
+            // fall through
+
+        case WXK_DOWN:
+            {
+                if (IsExpanded(m_current))
+                {
+                    long cookie = 0;
+                    wxTreeItemId child = GetFirstChild( m_current, cookie );
+                    SelectItem( child );
+                    EnsureVisible( child );
+                }
+                else
+                {
+                    wxTreeItemId next = GetNextSibling( m_current );
+                    if (next == 0)
+                    {
+                        wxTreeItemId current = m_current;
+                        while (current && !next)
+                        {
+                            current = GetParent( current );
+                            if (current) next = GetNextSibling( current );
+                        }
+                    }
+                    if (next != 0)
+                    {
+                        SelectItem( next );
+                        EnsureVisible( next );
+                    }
+                }
+            }
+            break;
+
+            // <End> selects the last visible tree item
+        case WXK_END:
+            {
+                wxTreeItemId last = GetRootItem();
+
+                while ( last.IsOk() && IsExpanded(last) )
+                {
+                    wxTreeItemId lastChild = GetLastChild(last);
+
+                    // 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
+                    if ( !lastChild )
+                        break;
+
+                    last = lastChild;
+                }
+
+                if ( last.IsOk() )
+                {
+                    EnsureVisible( last );
+                    SelectItem( last );
+                }
+            }
+            break;
+
+            // <Home> selects the root item
+        case WXK_HOME:
+            {
+                wxTreeItemId prev = GetRootItem();
+                if (prev)
+                {
+                    EnsureVisible( prev );
+                    SelectItem( prev );
+                }
+            }
+            break;
+
+        default:
+            event.Skip();

     }
     }

-  }
-  event.Skip();
+}
+
+wxTreeItemId wxTreeCtrl::HitTest(const wxPoint& point, int& WXUNUSED(flags))
+{
+    bool onButton = FALSE;
+    return m_anchor->HitTest( point, onButton );

 }
 
 void wxTreeCtrl::OnMouse( wxMouseEvent &event )
 {
 }
 
 void wxTreeCtrl::OnMouse( wxMouseEvent &event )
 {

-  if ( !(event.LeftDown() || event.LeftDClick()) )
-    return;
+    if (!event.LeftIsDown()) m_dragCount = 0;

 
 

-  if ( !m_anchor )
-    return;
+    if ( !(event.LeftDown() || event.LeftDClick() || event.Dragging()) ) return;

 
 

-  wxClientDC dc(this);
-  PrepareDC(dc);
-  long x = dc.DeviceToLogicalX( (long)event.GetX() );
-  long y = dc.DeviceToLogicalY( (long)event.GetY() );
+    if ( !m_anchor ) return;

 
 

-  bool onButton = FALSE;
-  wxGenericTreeItem *item = m_anchor->HitTest( wxPoint(x,y), onButton );
-  if ( item == NULL )
-    return;
+    wxClientDC dc(this);
+    PrepareDC(dc);
+    long x = dc.DeviceToLogicalX( (long)event.GetX() );
+    long y = dc.DeviceToLogicalY( (long)event.GetY() );

 
 

-  if (!IsSelected(item)) SelectItem(item);
+    bool onButton = FALSE;
+    wxGenericTreeItem *item = m_anchor->HitTest( wxPoint(x,y), onButton );

 
 

-  if ( event.LeftDClick() )
-  {
-    wxTreeEvent event( wxEVT_COMMAND_TREE_KEY_DOWN, GetId() );
-    event.m_item = item;
-    event.m_code = 0;
-    event.SetEventObject( this );
-    GetEventHandler()->ProcessEvent( event );
-  }
+    if (item == NULL) return;  /* we hit the blank area */

 
 

-  if ( onButton )
-  {
-    Toggle( item );
-  }
+    if (event.Dragging())
+    {
+        if (m_dragCount == 2)  /* small drag latency (3?) */
+        {
+            m_dragCount = 0;
+
+            wxTreeEvent nevent(wxEVT_COMMAND_TREE_BEGIN_DRAG, GetId());
+            nevent.m_item = m_current;
+            nevent.SetEventObject(this);
+            GetEventHandler()->ProcessEvent(nevent);
+        }
+        else
+        {
+            m_dragCount++;
+        }
+        return;
+    }
+
+    if (!IsSelected(item)) SelectItem(item);  /* we dont support multiple selections, BTW */
+
+    if (event.LeftDClick())
+    {
+        wxTreeEvent event( wxEVT_COMMAND_TREE_ITEM_ACTIVATED, GetId() );
+        event.m_item = item;
+        event.m_code = 0;
+        event.SetEventObject( this );
+        GetEventHandler()->ProcessEvent( event );
+    }
+
+    if (onButton)
+    {
+        Toggle( item );
+    }

 }
 
 void wxTreeCtrl::OnIdle( wxIdleEvent &WXUNUSED(event) )
 {
 }
 
 void wxTreeCtrl::OnIdle( wxIdleEvent &WXUNUSED(event) )
 {

-  if (!m_dirty) return;
-  
-  m_dirty = FALSE;
-  
-  CalculatePositions();
+    /* after all changes have been done to the tree control,
+     * we actually redraw the tree when everything is over */

 
 

-  AdjustMyScrollbars();
+    if (!m_dirty) return;
+
+    m_dirty = FALSE;
+
+    CalculatePositions();
+
+    AdjustMyScrollbars();

 }
 
 // -----------------------------------------------------------------------------
 }
 
 // -----------------------------------------------------------------------------

-// -----------------------------------------------------------------------------
-void wxTreeCtrl::CalculateLevel( wxGenericTreeItem *item,
-                                 wxDC &dc,
-                                 int level,
-                                 int &y )
+
+void wxTreeCtrl::CalculateLevel( wxGenericTreeItem *item, wxDC &dc, int level, int &y )

 {
 {

-  int horizX = level*m_indent;
+    int horizX = level*m_indent;

 
 

-  item->SetX( horizX+33 );
-  item->SetY( y-m_lineHeight/3-2 );
-  item->SetHeight( m_lineHeight );
+    item->SetX( horizX+33 );
+    item->SetY( y-m_lineHeight/3-2 );
+    item->SetHeight( m_lineHeight );

 
 

-  if ( item->IsExpanded() )
-    return;
+    if ( !item->IsExpanded() )
+    {
+        /* we dont need to calculate collapsed branches */
+        return;
+    }

 
 

-  wxArrayTreeItems& children = item->GetChildren();
-  size_t count = children.Count();
-  for ( size_t n = 0; n < count; n++ )
-  {
-    y += m_lineHeight;
-    CalculateLevel( children[n], dc, level+1, y );
-  }
+    wxArrayTreeItems& children = item->GetChildren();
+    size_t count = children.Count();
+    for ( size_t n = 0; n < count; n++ )
+    {
+        y += m_lineHeight;
+        CalculateLevel( children[n], dc, level+1, y );  /* recurse */
+    }

 }
 
 void wxTreeCtrl::CalculatePositions()
 {
 }
 
 void wxTreeCtrl::CalculatePositions()
 {

-  if ( !m_anchor )
-    return;
+    if ( !m_anchor ) return;

 
 

-  wxClientDC dc(this);
-  PrepareDC( dc );
+    wxClientDC dc(this);
+    PrepareDC( dc );

 
 

-  dc.SetFont( wxSystemSettings::GetSystemFont( wxSYS_SYSTEM_FONT ) );
+    dc.SetFont( wxSystemSettings::GetSystemFont( wxSYS_DEFAULT_GUI_FONT ) );

 
 

-  dc.SetPen( m_dottedPen );
-  m_lineHeight = (int)(dc.GetCharHeight() + 4);
+    dc.SetPen( m_dottedPen );
+    m_lineHeight = (int)(dc.GetCharHeight() + 4);

 
 

-  int y = m_lineHeight / 2 + 2;
-  CalculateLevel( m_anchor, dc, 0, y );
+    int y = m_lineHeight / 2 + 2;
+    CalculateLevel( m_anchor, dc, 0, y ); /* start recursion */

 }
 
 void wxTreeCtrl::RefreshSubtree(wxGenericTreeItem *item)
 {
 }
 
 void wxTreeCtrl::RefreshSubtree(wxGenericTreeItem *item)
 {

-  wxClientDC dc(this);
-  PrepareDC(dc);
+    wxClientDC dc(this);
+    PrepareDC(dc);

 
 

-  int cw = 0;
-  int ch = 0;
-  GetClientSize( &cw, &ch );
+    int cw = 0;
+    int ch = 0;
+    GetClientSize( &cw, &ch );

 
 

-  wxRect rect;
-  rect.x = dc.LogicalToDeviceX( 0 );
-  rect.width = cw;
-  rect.y = dc.LogicalToDeviceY( item->GetY() );
-  rect.height = ch;
+    wxRect rect;
+    rect.x = dc.LogicalToDeviceX( 0 );
+    rect.width = cw;
+    rect.y = dc.LogicalToDeviceY( item->GetY() );
+    rect.height = ch;

 
 

-  Refresh( TRUE, &rect );
+    Refresh( TRUE, &rect );

 
 

-  AdjustMyScrollbars();
+    AdjustMyScrollbars();

 }
 
 void wxTreeCtrl::RefreshLine( wxGenericTreeItem *item )
 {
 }
 
 void wxTreeCtrl::RefreshLine( wxGenericTreeItem *item )
 {

-  wxClientDC dc(this);
-  PrepareDC( dc );
-
-  wxRect rect;
-  rect.x = dc.LogicalToDeviceX( item->GetX() - 2 );
-  rect.y = dc.LogicalToDeviceY( item->GetY() - 2 );
-  rect.width = 1000;
-  rect.height = dc.GetCharHeight() + 6;
-  Refresh( TRUE, &rect );
+    wxClientDC dc(this);
+    PrepareDC( dc );
+
+    wxRect rect;
+    rect.x = dc.LogicalToDeviceX( item->GetX() - 2 );
+    rect.y = dc.LogicalToDeviceY( item->GetY() - 2 );
+    rect.width = 1000;
+    rect.height = dc.GetCharHeight() + 6;
+
+    Refresh( TRUE, &rect );

 }
 
 }