some typos in docs and code corrected (thanks Janos)

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

diff --git a/src/msw/treectrl.cpp b/src/msw/treectrl.cpp
index 69cfdaf31c89af0edb53252a42d6939f9abdfe49..eb6dfc49774a897eaf883c1253c905ccc3225502 100644 (file)
--- a/src/msw/treectrl.cpp
+++ b/src/msw/treectrl.cpp
@@ -28,17 +28,23 @@
 #endif
 
 #ifndef WX_PRECOMP
 #endif
 
 #ifndef WX_PRECOMP

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

 #endif
 
 #if defined(__WIN95__)
 
 #include "wx/log.h"
 #endif
 
 #if defined(__WIN95__)
 
 #include "wx/log.h"

+#include "wx/dynarray.h"

 #include "wx/imaglist.h"
 #include "wx/imaglist.h"

+#include "wx/msw/treectrl.h"

 
 #include "wx/msw/private.h"
 
 
 #include "wx/msw/private.h"
 

-#ifndef __GNUWIN32__
+#ifdef __GNUWIN32__
+#include "wx/msw/gnuwin32/extra.h"
+#endif
+
+#if (defined(__WIN95__) && !defined(__GNUWIN32__)) || defined(__TWIN32__)

     #include <commctrl.h>
 #endif
 
     #include <commctrl.h>
 #endif
 


@@ -54,7 +60,9 @@
 #undef GetNextSibling
 #endif
 
 #undef GetNextSibling
 #endif
 

-#include "wx/treectrl.h"
+#ifdef GetClassInfo
+#undef GetClassInfo
+#endif

 
 // Bug in headers, sometimes
 #ifndef TVIS_FOCUSED
 
 // Bug in headers, sometimes
 #ifndef TVIS_FOCUSED


@@ -132,7 +140,8 @@ bool wxTreeCtrl::Create(wxWindow *parent, wxWindowID id,
 
     m_windowId = (id == -1) ? NewControlId() : id;
 
 
     m_windowId = (id == -1) ? NewControlId() : id;
 

-    DWORD wstyle = WS_VISIBLE | WS_CHILD | WS_TABSTOP | TVS_HASLINES;
+    DWORD wstyle = WS_VISIBLE | WS_CHILD | WS_TABSTOP | TVS_HASLINES | TVS_SHOWSELALWAYS ;
+

 
     bool want3D;
     WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D) ;
 
     bool want3D;
     WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D) ;


@@ -254,6 +263,31 @@ void wxTreeCtrl::SetStateImageList(wxImageList *imageList)
     SetAnyImageList(m_imageListState = imageList, TVSIL_STATE);
 }
 
     SetAnyImageList(m_imageListState = imageList, TVSIL_STATE);
 }
 

+size_t wxTreeCtrl::GetChildrenCount(const wxTreeItemId& item, bool recursively)
+{
+    long cookie;
+
+    size_t result = 0;
+
+    wxArrayLong children;
+    wxTreeItemId child = GetFirstChild(item, cookie);
+    while ( child.IsOk() )
+    {
+        if ( recursively )
+        {
+            // recursive call
+            result += GetChildrenCount(child, TRUE);
+        }
+
+        // add the child to the result in any case
+        result++;
+
+        child = GetNextChild(item, cookie);
+    }
+
+    return result;
+}
+

 // ----------------------------------------------------------------------------
 // Item access
 // ----------------------------------------------------------------------------
 // ----------------------------------------------------------------------------
 // Item access
 // ----------------------------------------------------------------------------


@@ -319,14 +353,7 @@ wxTreeItemData *wxTreeCtrl::GetItemData(const wxTreeItemId& item) const
         return NULL;
     }
 
         return NULL;
     }
 

-    wxTreeItemData *data = (wxTreeItemData *)tvItem.lParam;
-    if ( data != NULL )
-    {
-        // the data object should know about its id
-        data->m_itemId = item;
-    }
-
-    return data;
+    return (wxTreeItemData *)tvItem.lParam;

 }
 
 void wxTreeCtrl::SetItemData(const wxTreeItemId& item, wxTreeItemData *data)
 }
 
 void wxTreeCtrl::SetItemData(const wxTreeItemId& item, wxTreeItemData *data)


@@ -336,16 +363,36 @@ void wxTreeCtrl::SetItemData(const wxTreeItemId& item, wxTreeItemData *data)
     DoSetItem(&tvItem);
 }
 
     DoSetItem(&tvItem);
 }
 

+void wxTreeCtrl::SetItemHasChildren(const wxTreeItemId& item, bool has)
+{
+    wxTreeViewItem tvItem(item, TVIF_CHILDREN);
+    tvItem.cChildren = (int)has;
+    DoSetItem(&tvItem);
+}
+
+void wxTreeCtrl::SetItemBold(const wxTreeItemId& item, bool bold)
+{
+    wxTreeViewItem tvItem(item, TVIF_STATE, TVIS_BOLD);
+    tvItem.state = bold ? TVIS_BOLD : 0;
+    DoSetItem(&tvItem);
+}
+
+void wxTreeCtrl::SetItemDropHighlight(const wxTreeItemId& item, bool highlight)
+{
+    wxTreeViewItem tvItem(item, TVIF_STATE, TVIS_DROPHILITED);
+    tvItem.state = highlight ? TVIS_DROPHILITED : 0;
+    DoSetItem(&tvItem);
+}
+

 // ----------------------------------------------------------------------------
 // Item status
 // ----------------------------------------------------------------------------
 
 bool wxTreeCtrl::IsVisible(const wxTreeItemId& item) const
 {
 // ----------------------------------------------------------------------------
 // Item status
 // ----------------------------------------------------------------------------
 
 bool wxTreeCtrl::IsVisible(const wxTreeItemId& item) const
 {

+    // Bug in Gnu-Win32 headers, so don't use the macro TreeView_GetItemRect

     RECT rect;
     RECT rect;

-//    return (TreeView_GetItemRect(wxhWnd, (HTREEITEM) (WXHTREEITEM)item, &rect, FALSE) != 0);
-    // Bug in Gnu-Win32 headers, so don't use the macro.
-    return (SendMessage((wxhWnd), TVM_GETITEMRECT, (WPARAM) FALSE, (LPARAM) & rect) != 0);
+    return SendMessage(wxhWnd, TVM_GETITEMRECT, FALSE, (LPARAM)&rect) != 0;

 
 }
 
 
 }
 


@@ -376,18 +423,26 @@ bool wxTreeCtrl::IsSelected(const wxTreeItemId& item) const
     return (tvItem.state & TVIS_SELECTED) != 0;
 }
 
     return (tvItem.state & TVIS_SELECTED) != 0;
 }
 

+bool wxTreeCtrl::IsBold(const wxTreeItemId& item) const
+{
+    wxTreeViewItem tvItem(item, TVIF_STATE, TVIS_BOLD);
+    DoGetItem(&tvItem);
+
+    return (tvItem.state & TVIS_BOLD) != 0;
+}
+

 // ----------------------------------------------------------------------------
 // navigation
 // ----------------------------------------------------------------------------
 
 wxTreeItemId wxTreeCtrl::GetRootItem() const
 {
 // ----------------------------------------------------------------------------
 // navigation
 // ----------------------------------------------------------------------------
 
 wxTreeItemId wxTreeCtrl::GetRootItem() const
 {

-    return wxTreeItemId(TreeView_GetRoot(wxhWnd));
+    return wxTreeItemId((WXHTREEITEM) TreeView_GetRoot(wxhWnd));

 }
 
 wxTreeItemId wxTreeCtrl::GetSelection() const
 {
 }
 
 wxTreeItemId wxTreeCtrl::GetSelection() const
 {

-    return wxTreeItemId(TreeView_GetSelection(wxhWnd));
+    return wxTreeItemId((WXHTREEITEM) TreeView_GetSelection(wxhWnd));

 }
 
 wxTreeItemId wxTreeCtrl::GetParent(const wxTreeItemId& item) const
 }
 
 wxTreeItemId wxTreeCtrl::GetParent(const wxTreeItemId& item) const


@@ -407,23 +462,42 @@ wxTreeItemId wxTreeCtrl::GetFirstChild(const wxTreeItemId& item,
 wxTreeItemId wxTreeCtrl::GetNextChild(const wxTreeItemId& WXUNUSED(item),
                                       long& _cookie) const
 {
 wxTreeItemId wxTreeCtrl::GetNextChild(const wxTreeItemId& WXUNUSED(item),
                                       long& _cookie) const
 {

-    return wxTreeItemId(TreeView_GetNextSibling(wxhWnd,
-                                                    (HTREEITEM) (WXHTREEITEM)_cookie));
+    wxTreeItemId l = wxTreeItemId((WXHTREEITEM)TreeView_GetNextSibling(wxhWnd,
+                                   (HTREEITEM)(WXHTREEITEM)_cookie));
+    _cookie = (long)l;
+
+    return l;
+}
+
+wxTreeItemId wxTreeCtrl::GetLastChild(const wxTreeItemId& item) const
+{
+    // can this be done more efficiently?
+    long cookie;
+
+    wxTreeItemId childLast,
+    child = GetFirstChild(item, cookie);
+    while ( child.IsOk() )
+    {
+        childLast = child;
+        child = GetNextChild(item, cookie);
+    }
+
+    return childLast;

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

-    return wxTreeItemId(TreeView_GetNextSibling(wxhWnd, (HTREEITEM) (WXHTREEITEM) item));
+    return wxTreeItemId((WXHTREEITEM) TreeView_GetNextSibling(wxhWnd, (HTREEITEM) (WXHTREEITEM) item));

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

-    return wxTreeItemId(TreeView_GetPrevSibling(wxhWnd, (HTREEITEM) (WXHTREEITEM) item));
+    return wxTreeItemId((WXHTREEITEM) TreeView_GetPrevSibling(wxhWnd, (HTREEITEM) (WXHTREEITEM) item));

 }
 
 wxTreeItemId wxTreeCtrl::GetFirstVisibleItem() const
 {
 }
 
 wxTreeItemId wxTreeCtrl::GetFirstVisibleItem() const
 {

-    return wxTreeItemId(TreeView_GetFirstVisible(wxhWnd));
+    return wxTreeItemId((WXHTREEITEM) TreeView_GetFirstVisible(wxhWnd));

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


@@ -431,7 +505,7 @@ wxTreeItemId wxTreeCtrl::GetNextVisible(const wxTreeItemId& item) const
     wxASSERT_MSG( IsVisible(item), "The item you call GetNextVisible() "
                                    "for must be visible itself!");
 
     wxASSERT_MSG( IsVisible(item), "The item you call GetNextVisible() "
                                    "for must be visible itself!");
 

-    return wxTreeItemId(TreeView_GetNextVisible(wxhWnd, (HTREEITEM) (WXHTREEITEM) item));
+    return wxTreeItemId((WXHTREEITEM) TreeView_GetNextVisible(wxhWnd, (HTREEITEM) (WXHTREEITEM) item));

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


@@ -439,7 +513,7 @@ wxTreeItemId wxTreeCtrl::GetPrevVisible(const wxTreeItemId& item) const
     wxASSERT_MSG( IsVisible(item), "The item you call GetPrevVisible() "
                                    "for must be visible itself!");
 
     wxASSERT_MSG( IsVisible(item), "The item you call GetPrevVisible() "
                                    "for must be visible itself!");
 

-    return wxTreeItemId(TreeView_GetPrevVisible(wxhWnd, (HTREEITEM) (WXHTREEITEM) item));
+    return wxTreeItemId((WXHTREEITEM) TreeView_GetPrevVisible(wxhWnd, (HTREEITEM) (WXHTREEITEM) item));

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


@@ -455,6 +529,13 @@ wxTreeItemId wxTreeCtrl::DoInsertItem(const wxTreeItemId& parent,
     TV_INSERTSTRUCT tvIns;
     tvIns.hParent = (HTREEITEM) (WXHTREEITEM)parent;
     tvIns.hInsertAfter = (HTREEITEM) (WXHTREEITEM) hInsertAfter;
     TV_INSERTSTRUCT tvIns;
     tvIns.hParent = (HTREEITEM) (WXHTREEITEM)parent;
     tvIns.hInsertAfter = (HTREEITEM) (WXHTREEITEM) hInsertAfter;

+
+    // This is how we insert the item as the first child: supply a NULL hInsertAfter
+    if (tvIns.hInsertAfter == (HTREEITEM) 0)
+    {
+        tvIns.hInsertAfter = TVI_FIRST;
+    }
+

     UINT mask = 0;
     if ( !text.IsEmpty() )
     {
     UINT mask = 0;
     if ( !text.IsEmpty() )
     {


@@ -466,6 +547,12 @@ wxTreeItemId wxTreeCtrl::DoInsertItem(const wxTreeItemId& parent,
     {
         mask |= TVIF_IMAGE;
         tvIns.item.iImage = image;
     {
         mask |= TVIF_IMAGE;
         tvIns.item.iImage = image;

+
+        if ( selectedImage == -1 )
+        {
+            // take the same image for selected icon if not specified
+            selectedImage = image;
+        }

     }
 
     if ( selectedImage != -1 )
     }
 
     if ( selectedImage != -1 )


@@ -488,6 +575,12 @@ wxTreeItemId wxTreeCtrl::DoInsertItem(const wxTreeItemId& parent,
         wxLogLastError("TreeView_InsertItem");
     }
 
         wxLogLastError("TreeView_InsertItem");
     }
 

+    if ( data != NULL )
+    {
+        // associate the application tree item with Win32 tree item handle
+        data->SetId((WXHTREEITEM)id);
+    }
+

     return wxTreeItemId((WXHTREEITEM)id);
 }
 
     return wxTreeItemId((WXHTREEITEM)id);
 }
 


@@ -538,15 +631,36 @@ wxTreeItemId wxTreeCtrl::AppendItem(const wxTreeItemId& parent,
 
 void wxTreeCtrl::Delete(const wxTreeItemId& item)
 {
 
 void wxTreeCtrl::Delete(const wxTreeItemId& item)
 {

-    wxTreeItemData *data = GetItemData(item);
-    delete data;    // may be NULL, ok
-

     if ( !TreeView_DeleteItem(wxhWnd, (HTREEITEM)(WXHTREEITEM)item) )
     {
         wxLogLastError("TreeView_DeleteItem");
     }
 }
 
     if ( !TreeView_DeleteItem(wxhWnd, (HTREEITEM)(WXHTREEITEM)item) )
     {
         wxLogLastError("TreeView_DeleteItem");
     }
 }
 

+// delete all children (but don't delete the item itself)
+void wxTreeCtrl::DeleteChildren(const wxTreeItemId& item)
+{
+    long cookie;
+
+    wxArrayLong children;
+    wxTreeItemId child = GetFirstChild(item, cookie);
+    while ( child.IsOk() )
+    {
+        children.Add((long)(WXHTREEITEM)child);
+
+        child = GetNextChild(item, cookie);
+    }
+
+    size_t nCount = children.Count();
+    for ( size_t n = 0; n < nCount; n++ )
+    {
+        if ( !TreeView_DeleteItem(wxhWnd, (HTREEITEM)children[n]) )
+        {
+            wxLogLastError("TreeView_DeleteItem");
+        }
+    }
+}
+

 void wxTreeCtrl::DeleteAllItems()
 {
     if ( !TreeView_DeleteAllItems(wxhWnd) )
 void wxTreeCtrl::DeleteAllItems()
 {
     if ( !TreeView_DeleteAllItems(wxhWnd) )


@@ -557,8 +671,10 @@ void wxTreeCtrl::DeleteAllItems()
 
 void wxTreeCtrl::DoExpand(const wxTreeItemId& item, int flag)
 {
 
 void wxTreeCtrl::DoExpand(const wxTreeItemId& item, int flag)
 {

-    wxASSERT_MSG( flag == TVE_COLLAPSE || flag == TVE_COLLAPSERESET ||
-                  flag == TVE_EXPAND   || flag == TVE_TOGGLE,
+    wxASSERT_MSG( flag == TVE_COLLAPSE ||
+                  flag == (TVE_COLLAPSE | TVE_COLLAPSERESET) ||
+                  flag == TVE_EXPAND   ||
+                  flag == TVE_TOGGLE,

                   "Unknown flag in wxTreeCtrl::DoExpand" );
 
     // TreeView_Expand doesn't send TVN_ITEMEXPAND(ING) messages, so we must
                   "Unknown flag in wxTreeCtrl::DoExpand" );
 
     // TreeView_Expand doesn't send TVN_ITEMEXPAND(ING) messages, so we must


@@ -598,7 +714,7 @@ void wxTreeCtrl::Collapse(const wxTreeItemId& item)
 
 void wxTreeCtrl::CollapseAndReset(const wxTreeItemId& item)
 {
 
 void wxTreeCtrl::CollapseAndReset(const wxTreeItemId& item)
 {

-    DoExpand(item, TVE_COLLAPSERESET);
+    DoExpand(item, TVE_COLLAPSE | TVE_COLLAPSERESET);

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


@@ -606,6 +722,11 @@ void wxTreeCtrl::Toggle(const wxTreeItemId& item)
     DoExpand(item, TVE_TOGGLE);
 }
 
     DoExpand(item, TVE_TOGGLE);
 }
 

+void wxTreeCtrl::ExpandItem(const wxTreeItemId& item, int action)
+{
+       DoExpand(item, action);
+}
+

 void wxTreeCtrl::Unselect()
 {
     SelectItem(wxTreeItemId((WXHTREEITEM) 0));
 void wxTreeCtrl::Unselect()
 {
     SelectItem(wxTreeItemId((WXHTREEITEM) 0));


@@ -706,17 +827,58 @@ wxTreeItemId wxTreeCtrl::HitTest(const wxPoint& point, int& flags)
     return wxTreeItemId((WXHTREEITEM) hitTestInfo.hItem);
 }
 
     return wxTreeItemId((WXHTREEITEM) hitTestInfo.hItem);
 }
 

-void wxTreeCtrl::SortChildren(const wxTreeItemId& item,
-                              wxTreeItemCmpFunc *cmpFunction)
+bool wxTreeCtrl::GetBoundingRect(const wxTreeItemId& item,
+                                 wxRect& rect,
+                                 bool textOnly) const

 {
 {

-    if ( cmpFunction == NULL )
+    RECT rc;
+    if ( TreeView_GetItemRect(wxhWnd, (HTREEITEM)(WXHTREEITEM)item,
+                              &rc, textOnly) )

     {
     {

-        TreeView_SortChildren(wxhWnd, (HTREEITEM) (WXHTREEITEM) item, 0);
+        rect = wxRect(wxPoint(rc.left, rc.top), wxPoint(rc.right, rc.bottom));
+
+        return TRUE;

     }
     else
     {
     }
     else
     {

-        // TODO: use TreeView_SortChildrenCB
-        wxFAIL_MSG("wxTreeCtrl::SortChildren not implemented");
+        // couldn't retrieve rect: for example, item isn't visible
+        return FALSE;
+    }
+}
+
+// ----------------------------------------------------------------------------
+// sorting stuff
+// ----------------------------------------------------------------------------
+
+static int CALLBACK TreeView_CompareCallback(wxTreeItemData *pItem1,
+                                             wxTreeItemData *pItem2,
+                                             wxTreeCtrl *tree)
+{
+    return tree->OnCompareItems(pItem1->GetId(), pItem2->GetId());
+}
+
+int wxTreeCtrl::OnCompareItems(const wxTreeItemId& item1,
+                               const wxTreeItemId& item2)
+{
+    return strcmp(GetItemText(item1), GetItemText(item2));
+}
+
+void wxTreeCtrl::SortChildren(const wxTreeItemId& item)
+{
+    // rely on the fact that TreeView_SortChildren does the same thing as our
+    // default behaviour, i.e. sorts items alphabetically and so call it
+    // directly if we're not in derived class (much more efficient!)
+    if ( GetClassInfo() == CLASSINFO(wxTreeCtrl) )
+    {
+        TreeView_SortChildren(wxhWnd, (HTREEITEM)(WXHTREEITEM)item, 0);
+    }
+    else
+    {
+        TV_SORTCB tvSort;
+        tvSort.hParent = (HTREEITEM)(WXHTREEITEM)item;
+        tvSort.lpfnCompare = (PFNTVCOMPARE)TreeView_CompareCallback;
+        tvSort.lParam = (LPARAM)this;
+        TreeView_SortChildrenCB(wxhWnd, &tvSort, 0 /* reserved */);

     }
 }
 
     }
 }
 


@@ -749,7 +911,7 @@ bool wxTreeCtrl::MSWCommand(WXUINT cmd, WXWORD id)
 }
 
 // process WM_NOTIFY Windows message
 }
 
 // process WM_NOTIFY Windows message

-bool wxTreeCtrl::MSWNotify(WXWPARAM wParam, WXLPARAM lParam)
+bool wxTreeCtrl::MSWNotify(WXWPARAM wParam, WXLPARAM lParam, WXLPARAM *result)

 {
     wxTreeEvent event(wxEVT_NULL, m_windowId);
     wxEventType eventType = wxEVT_NULL;
 {
     wxTreeEvent event(wxEVT_NULL, m_windowId);
     wxEventType eventType = wxEVT_NULL;


@@ -854,6 +1016,16 @@ bool wxTreeCtrl::MSWNotify(WXWPARAM wParam, WXLPARAM lParam)
                 TV_KEYDOWN *info = (TV_KEYDOWN *)lParam;
 
                 event.m_code = wxCharCodeMSWToWX(info->wVKey);
                 TV_KEYDOWN *info = (TV_KEYDOWN *)lParam;
 
                 event.m_code = wxCharCodeMSWToWX(info->wVKey);

+
+                // a separate event for this case
+                if ( info->wVKey == VK_SPACE || info->wVKey == VK_RETURN )
+                {
+                    wxTreeEvent event2(wxEVT_COMMAND_TREE_ITEM_ACTIVATED,
+                                       m_windowId);
+                    event2.SetEventObject(this);
+
+                    GetEventHandler()->ProcessEvent(event2);
+                }

                 break;
             }
 
                 break;
             }
 


@@ -875,46 +1047,39 @@ bool wxTreeCtrl::MSWNotify(WXWPARAM wParam, WXLPARAM lParam)
             }
 
         default:
             }
 
         default:

-            return wxControl::MSWNotify(wParam, lParam);
+            return wxControl::MSWNotify(wParam, lParam, result);

     }
 
     event.SetEventObject(this);
     event.SetEventType(eventType);
 
     }
 
     event.SetEventObject(this);
     event.SetEventType(eventType);
 

-    bool rc = GetEventHandler()->ProcessEvent(event);
+    bool processed = GetEventHandler()->ProcessEvent(event);

 
     // post processing
 
     // post processing

-    switch ( hdr->code )
+    if ( hdr->code == TVN_DELETEITEM )

     {
         // NB: we might process this message using wxWindows event tables, but
         //     due to overhead of wxWin event system we prefer to do it here
         //     (otherwise deleting a tree with many items is just too slow)
     {
         // NB: we might process this message using wxWindows event tables, but
         //     due to overhead of wxWin event system we prefer to do it here
         //     (otherwise deleting a tree with many items is just too slow)

-        case TVN_DELETEITEM:
-            {
-                NM_TREEVIEW* tv = (NM_TREEVIEW *)lParam;
-                wxTreeItemData *data = (wxTreeItemData *)tv->itemOld.lParam;
-                delete data; // may be NULL, ok
-            }
-            break;
-
-        case TVN_ITEMEXPANDING:
-            // if user called Veto(), don't allow expansion/collapse by
-            // returning TRUE from here
-            rc = event.m_code != 0;
-            break;
+        NM_TREEVIEW* tv = (NM_TREEVIEW *)lParam;
+        wxTreeItemData *data = (wxTreeItemData *)tv->itemOld.lParam;
+        delete data; // may be NULL, ok
+        processed = TRUE; // Make sure we don't get called twice

     }
 
     }
 

-    return rc;
+    *result = !event.IsAllowed();
+
+    return processed;

 }
 
 // ----------------------------------------------------------------------------
 // Tree event
 // ----------------------------------------------------------------------------
 
 }
 
 // ----------------------------------------------------------------------------
 // Tree event
 // ----------------------------------------------------------------------------
 

-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 = 0;
 {
     m_code = 0;
     m_itemOld = 0;