Ensure there is valid context for DrawRectangle

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

diff --git a/src/msw/treectrl.cpp b/src/msw/treectrl.cpp
index 1f45e5b01e49dfede4a8236a5944e1f31b2ff01b..0ac6f626c0ccec0da55434dc010c097c2f6d5ea8 100644 (file)
--- a/src/msw/treectrl.cpp
+++ b/src/msw/treectrl.cpp
@@ -40,12 +40,9 @@
 #include "wx/dynlib.h"
 #include "wx/msw/private.h"
 
 #include "wx/dynlib.h"
 #include "wx/msw/private.h"
 

-// Set this to 1 to be _absolutely_ sure that repainting will work for all
-// comctl32.dll versions
-#define wxUSE_COMCTL32_SAFELY 0
-

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

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

 
 // macros to hide the cast ugliness
 // --------------------------------
 
 // macros to hide the cast ugliness
 // --------------------------------


@@ -80,20 +77,28 @@ typedef struct tagNMTVITEMCHANGE
 // The vista tree control includes some new code that originally broke the
 // multi-selection tree, causing seemingly spurious item selection state changes
 // during Shift or Ctrl-click item selection. (To witness the original broken
 // The vista tree control includes some new code that originally broke the
 // multi-selection tree, causing seemingly spurious item selection state changes
 // during Shift or Ctrl-click item selection. (To witness the original broken

-// behavior, simply make IsLocked() below always return false). This problem was
+// behaviour, simply make IsLocked() below always return false). This problem was

 // solved by using the following class to 'unlock' an item's selection state.
 
 class TreeItemUnlocker
 {
 public:
     // unlock a single item
 // solved by using the following class to 'unlock' an item's selection state.
 
 class TreeItemUnlocker
 {
 public:
     // unlock a single item

-    TreeItemUnlocker(HTREEITEM item) { ms_unlockedItem = item; }
+    TreeItemUnlocker(HTREEITEM item)
+    {
+        m_oldUnlockedItem = ms_unlockedItem;
+        ms_unlockedItem = item;
+    }

 
     // unlock all items, don't use unless absolutely necessary
 
     // unlock all items, don't use unless absolutely necessary

-    TreeItemUnlocker() { ms_unlockedItem = (HTREEITEM)-1; }
+    TreeItemUnlocker()
+    {
+        m_oldUnlockedItem = ms_unlockedItem;
+        ms_unlockedItem = (HTREEITEM)-1;
+    }

 
     // lock everything back
 
     // lock everything back

-    ~TreeItemUnlocker() { ms_unlockedItem = NULL; }
+    ~TreeItemUnlocker() { ms_unlockedItem = m_oldUnlockedItem; }

 
 
     // check if the item state is currently locked
 
 
     // check if the item state is currently locked


@@ -102,14 +107,67 @@ public:
 
 private:
     static HTREEITEM ms_unlockedItem;
 
 private:
     static HTREEITEM ms_unlockedItem;

+    HTREEITEM m_oldUnlockedItem;
+
+    wxDECLARE_NO_COPY_CLASS(TreeItemUnlocker);

 };
 
 HTREEITEM TreeItemUnlocker::ms_unlockedItem = NULL;
 
 };
 
 HTREEITEM TreeItemUnlocker::ms_unlockedItem = NULL;
 

+// another helper class: set the variable to true during its lifetime and reset
+// it to false when it is destroyed
+//
+// it is currently always used with wxTreeCtrl::m_changingSelection
+class TempSetter
+{
+public:
+    TempSetter(bool& var) : m_var(var)
+    {
+        wxASSERT_MSG( !m_var, "variable shouldn't be already set" );
+        m_var = true;
+    }
+
+    ~TempSetter()
+    {
+        m_var = false;
+    }
+
+private:
+    bool& m_var;
+
+    wxDECLARE_NO_COPY_CLASS(TempSetter);
+};
+

 // ----------------------------------------------------------------------------
 // private functions
 // ----------------------------------------------------------------------------
 
 // ----------------------------------------------------------------------------
 // private functions
 // ----------------------------------------------------------------------------
 

+namespace
+{
+
+// Work around a problem with TreeView_GetItemRect() when using MinGW/Cygwin:
+// it results in warnings about breaking strict aliasing rules because HITEM is
+// passed via a RECT pointer, so use a union to avoid them and define our own
+// version of the standard macro using it.
+union TVGetItemRectParam
+{
+    RECT rect;
+    HTREEITEM hItem;
+};
+
+inline bool
+wxTreeView_GetItemRect(HWND hwnd,
+                       HTREEITEM hItem,
+                       TVGetItemRectParam& param,
+                       BOOL fItemRect)
+{
+    param.hItem = hItem;
+    return ::SendMessage(hwnd, TVM_GETITEMRECT, fItemRect,
+                        (LPARAM)&param) == TRUE;
+}
+
+} // anonymous namespace
+

 // wrappers for TreeView_GetItem/TreeView_SetItem
 static bool IsItemSelected(HWND hwndTV, HTREEITEM hItem)
 {
 // wrappers for TreeView_GetItem/TreeView_SetItem
 static bool IsItemSelected(HWND hwndTV, HTREEITEM hItem)
 {


@@ -392,14 +450,18 @@ public:
             switch ( which )
             {
                 case wxTreeItemIcon_SelectedExpanded:
             switch ( which )
             {
                 case wxTreeItemIcon_SelectedExpanded:

-                    image = GetImage(wxTreeItemIcon_Expanded);
+                    // We consider that expanded icon is more important than
+                    // selected so test for it first.
+                    image = m_images[wxTreeItemIcon_Expanded];
+                    if ( image == -1 )
+                        image = m_images[wxTreeItemIcon_Selected];

                     if ( image != -1 )
                         break;
                     //else: fall through
 
                 case wxTreeItemIcon_Selected:
                 case wxTreeItemIcon_Expanded:
                     if ( image != -1 )
                         break;
                     //else: fall through
 
                 case wxTreeItemIcon_Selected:
                 case wxTreeItemIcon_Expanded:

-                    image = GetImage(wxTreeItemIcon_Normal);
+                    image = m_images[wxTreeItemIcon_Normal];

                     break;
 
                 case wxTreeItemIcon_Normal:
                     break;
 
                 case wxTreeItemIcon_Normal:


@@ -407,7 +469,7 @@ public:
                     break;
 
                 default:
                     break;
 
                 default:

-                    wxFAIL_MSG( _T("unsupported wxTreeItemIcon value") );
+                    wxFAIL_MSG( wxT("unsupported wxTreeItemIcon value") );

             }
         }
 
             }
         }
 


@@ -577,72 +639,6 @@ private:
 // wxWin macros
 // ----------------------------------------------------------------------------
 
 // wxWin macros
 // ----------------------------------------------------------------------------
 

-#if wxUSE_EXTENDED_RTTI
-WX_DEFINE_FLAGS( wxTreeCtrlStyle )
-
-wxBEGIN_FLAGS( wxTreeCtrlStyle )
-    // new style border flags, we put them first to
-    // use them for streaming out
-    wxFLAGS_MEMBER(wxBORDER_SIMPLE)
-    wxFLAGS_MEMBER(wxBORDER_SUNKEN)
-    wxFLAGS_MEMBER(wxBORDER_DOUBLE)
-    wxFLAGS_MEMBER(wxBORDER_RAISED)
-    wxFLAGS_MEMBER(wxBORDER_STATIC)
-    wxFLAGS_MEMBER(wxBORDER_NONE)
-
-    // old style border flags
-    wxFLAGS_MEMBER(wxSIMPLE_BORDER)
-    wxFLAGS_MEMBER(wxSUNKEN_BORDER)
-    wxFLAGS_MEMBER(wxDOUBLE_BORDER)
-    wxFLAGS_MEMBER(wxRAISED_BORDER)
-    wxFLAGS_MEMBER(wxSTATIC_BORDER)
-    wxFLAGS_MEMBER(wxBORDER)
-
-    // standard window styles
-    wxFLAGS_MEMBER(wxTAB_TRAVERSAL)
-    wxFLAGS_MEMBER(wxCLIP_CHILDREN)
-    wxFLAGS_MEMBER(wxTRANSPARENT_WINDOW)
-    wxFLAGS_MEMBER(wxWANTS_CHARS)
-    wxFLAGS_MEMBER(wxFULL_REPAINT_ON_RESIZE)
-    wxFLAGS_MEMBER(wxALWAYS_SHOW_SB )
-    wxFLAGS_MEMBER(wxVSCROLL)
-    wxFLAGS_MEMBER(wxHSCROLL)
-
-    wxFLAGS_MEMBER(wxTR_EDIT_LABELS)
-    wxFLAGS_MEMBER(wxTR_NO_BUTTONS)
-    wxFLAGS_MEMBER(wxTR_HAS_BUTTONS)
-    wxFLAGS_MEMBER(wxTR_TWIST_BUTTONS)
-    wxFLAGS_MEMBER(wxTR_NO_LINES)
-    wxFLAGS_MEMBER(wxTR_FULL_ROW_HIGHLIGHT)
-    wxFLAGS_MEMBER(wxTR_LINES_AT_ROOT)
-    wxFLAGS_MEMBER(wxTR_HIDE_ROOT)
-    wxFLAGS_MEMBER(wxTR_ROW_LINES)
-    wxFLAGS_MEMBER(wxTR_HAS_VARIABLE_ROW_HEIGHT)
-    wxFLAGS_MEMBER(wxTR_SINGLE)
-    wxFLAGS_MEMBER(wxTR_MULTIPLE)
-#if WXWIN_COMPATIBILITY_2_8
-    wxFLAGS_MEMBER(wxTR_EXTENDED)
-#endif
-    wxFLAGS_MEMBER(wxTR_DEFAULT_STYLE)
-
-wxEND_FLAGS( wxTreeCtrlStyle )
-
-IMPLEMENT_DYNAMIC_CLASS_XTI(wxTreeCtrl, wxControl,"wx/treectrl.h")
-
-wxBEGIN_PROPERTIES_TABLE(wxTreeCtrl)
-    wxEVENT_PROPERTY( TextUpdated , wxEVT_COMMAND_TEXT_UPDATED , wxCommandEvent )
-    wxEVENT_RANGE_PROPERTY( TreeEvent , wxEVT_COMMAND_TREE_BEGIN_DRAG , wxEVT_COMMAND_TREE_STATE_IMAGE_CLICK , wxTreeEvent )
-    wxPROPERTY_FLAGS( WindowStyle , wxTreeCtrlStyle , long , SetWindowStyleFlag , GetWindowStyleFlag , EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) // style
-wxEND_PROPERTIES_TABLE()
-
-wxBEGIN_HANDLERS_TABLE(wxTreeCtrl)
-wxEND_HANDLERS_TABLE()
-
-wxCONSTRUCTOR_5( wxTreeCtrl , wxWindow* , Parent , wxWindowID , Id , wxPoint , Position , wxSize , Size , long , WindowStyle )
-#else
-IMPLEMENT_DYNAMIC_CLASS(wxTreeCtrl, wxControl)
-#endif
-

 // ----------------------------------------------------------------------------
 // constants
 // ----------------------------------------------------------------------------
 // ----------------------------------------------------------------------------
 // constants
 // ----------------------------------------------------------------------------


@@ -724,7 +720,9 @@ void wxTreeCtrl::Init()
     m_pVirtualRoot = NULL;
     m_dragStarted = false;
     m_focusLost = true;
     m_pVirtualRoot = NULL;
     m_dragStarted = false;
     m_focusLost = true;

+    m_changingSelection = false;

     m_triggerStateImageClick = false;
     m_triggerStateImageClick = false;

+    m_mouseUpDeselect = false;

 
     // initialize the global array of events now as it can't be done statically
     // with the wxEVT_XXX values being allocated during run-time only
 
     // initialize the global array of events now as it can't be done statically
     // with the wxEVT_XXX values being allocated during run-time only


@@ -780,30 +778,32 @@ bool wxTreeCtrl::Create(wxWindow *parent,
     if ( !MSWCreateControl(WC_TREEVIEW, wstyle, pos, size) )
         return false;
 
     if ( !MSWCreateControl(WC_TREEVIEW, wstyle, pos, size) )
         return false;
 

-#if wxUSE_COMCTL32_SAFELY
-    wxWindow::SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
-    wxWindow::SetForegroundColour(wxWindow::GetParent()->GetForegroundColour());
-#elif 1

     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
     SetForegroundColour(wxWindow::GetParent()->GetForegroundColour());
     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
     SetForegroundColour(wxWindow::GetParent()->GetForegroundColour());

-#else
-    // This works around a bug in the Windows tree control whereby for some versions
-    // of comctrl32, setting any colour actually draws the background in black.
-    // This will initialise the background to the system colour.
-    // THIS FIX NOW REVERTED since it caused problems on _other_ systems.
-    // Assume the user has an updated comctl32.dll.
-    ::SendMessage(GetHwnd(), TVM_SETBKCOLOR, 0,-1);
-    wxWindow::SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
-    SetForegroundColour(wxWindow::GetParent()->GetForegroundColour());
-#endif

 
     wxSetCCUnicodeFormat(GetHwnd());
 
 
     wxSetCCUnicodeFormat(GetHwnd());
 

+    if ( m_windowStyle & wxTR_TWIST_BUTTONS )
+    {
+        // Under Vista and later Explorer uses rotating ("twist") buttons
+        // instead of the default "+/-" ones so apply its theme to the tree
+        // control to implement this style.
+        if ( wxGetWinVersion() >= wxWinVersion_Vista )
+        {
+            if ( wxUxThemeEngine *theme = wxUxThemeEngine::GetIfActive() )
+            {
+                theme->SetWindowTheme(GetHwnd(), L"EXPLORER", NULL);
+            }
+        }
+    }
+

     return true;
 }
 
 wxTreeCtrl::~wxTreeCtrl()
 {
     return true;
 }
 
 wxTreeCtrl::~wxTreeCtrl()
 {

+    m_isBeingDeleted = true;
+

     // delete any attributes
     if ( m_hasAnyAttr )
     {
     // delete any attributes
     if ( m_hasAnyAttr )
     {


@@ -841,7 +841,7 @@ wxTreeCtrl::GetClassDefaultAttributes(wxWindowVariant variant)
 bool wxTreeCtrl::DoGetItem(wxTreeViewItem *tvItem) const
 {
     wxCHECK_MSG( tvItem->hItem != TVI_ROOT, false,
 bool wxTreeCtrl::DoGetItem(wxTreeViewItem *tvItem) const
 {
     wxCHECK_MSG( tvItem->hItem != TVI_ROOT, false,

-                 _T("can't retrieve virtual root item") );
+                 wxT("can't retrieve virtual root item") );

 
     if ( !TreeView_GetItem(GetHwnd(), tvItem) )
     {
 
     if ( !TreeView_GetItem(GetHwnd(), tvItem) )
     {


@@ -917,24 +917,20 @@ size_t wxTreeCtrl::GetChildrenCount(const wxTreeItemId& item,
 
 bool wxTreeCtrl::SetBackgroundColour(const wxColour &colour)
 {
 
 bool wxTreeCtrl::SetBackgroundColour(const wxColour &colour)
 {

-#if !wxUSE_COMCTL32_SAFELY

     if ( !wxWindowBase::SetBackgroundColour(colour) )
         return false;
 
     ::SendMessage(GetHwnd(), TVM_SETBKCOLOR, 0, colour.GetPixel());
     if ( !wxWindowBase::SetBackgroundColour(colour) )
         return false;
 
     ::SendMessage(GetHwnd(), TVM_SETBKCOLOR, 0, colour.GetPixel());

-#endif

 
     return true;
 }
 
 bool wxTreeCtrl::SetForegroundColour(const wxColour &colour)
 {
 
     return true;
 }
 
 bool wxTreeCtrl::SetForegroundColour(const wxColour &colour)
 {

-#if !wxUSE_COMCTL32_SAFELY

     if ( !wxWindowBase::SetForegroundColour(colour) )
         return false;
 
     ::SendMessage(GetHwnd(), TVM_SETTEXTCOLOR, 0, colour.GetPixel());
     if ( !wxWindowBase::SetForegroundColour(colour) )
         return false;
 
     ::SendMessage(GetHwnd(), TVM_SETTEXTCOLOR, 0, colour.GetPixel());

-#endif

 
     return true;
 }
 
     return true;
 }


@@ -974,7 +970,7 @@ void wxTreeCtrl::SetItemText(const wxTreeItemId& item, const wxString& text)
         return;
 
     wxTreeViewItem tvItem(item, TVIF_TEXT);
         return;
 
     wxTreeViewItem tvItem(item, TVIF_TEXT);

-    tvItem.pszText = (wxChar *)text.wx_str();  // conversion is ok
+    tvItem.pszText = wxMSW_CONV_LPTSTR(text);

     DoSetItem(&tvItem);
 
     // when setting the text of the item being edited, the text control should
     DoSetItem(&tvItem);
 
     // when setting the text of the item being edited, the text control should


@@ -987,7 +983,7 @@ void wxTreeCtrl::SetItemText(const wxTreeItemId& item, const wxString& text)
     {
         if ( item == m_idEdited )
         {
     {
         if ( item == m_idEdited )
         {

-            ::SetWindowText(hwndEdit, text.wx_str());
+            ::SetWindowText(hwndEdit, text.t_str());

         }
     }
 }
         }
     }
 }


@@ -1245,14 +1241,10 @@ bool wxTreeCtrl::IsVisible(const wxTreeItemId& item) const
     }
 
     // Bug in Gnu-Win32 headers, so don't use the macro TreeView_GetItemRect
     }
 
     // Bug in Gnu-Win32 headers, so don't use the macro TreeView_GetItemRect

-    RECT rect;
-
-    // this ugliness comes directly from MSDN - it *is* the correct way to pass
-    // the HTREEITEM with TVM_GETITEMRECT
-    *(HTREEITEM *)&rect = HITEM(item);
+    TVGetItemRectParam param;

 
     // true means to get rect for just the text, not the whole line
 
     // true means to get rect for just the text, not the whole line

-    if ( !::SendMessage(GetHwnd(), TVM_GETITEMRECT, true, (LPARAM)&rect) )
+    if ( !wxTreeView_GetItemRect(GetHwnd(), HITEM(item), param, TRUE) )

     {
         // if TVM_GETITEMRECT returned false, then the item is definitely not
         // visible (because its parent is not expanded)
     {
         // if TVM_GETITEMRECT returned false, then the item is definitely not
         // visible (because its parent is not expanded)


@@ -1262,7 +1254,7 @@ bool wxTreeCtrl::IsVisible(const wxTreeItemId& item) const
     // however if it returned true, the item might still be outside the
     // currently visible part of the tree, test for it (notice that partly
     // visible means visible here)
     // however if it returned true, the item might still be outside the
     // currently visible part of the tree, test for it (notice that partly
     // visible means visible here)

-    return rect.bottom > 0 && rect.top < GetClientSize().y;
+    return param.rect.bottom > 0 && param.rect.top < GetClientSize().y;

 }
 
 bool wxTreeCtrl::ItemHasChildren(const wxTreeItemId& item) const
 }
 
 bool wxTreeCtrl::ItemHasChildren(const wxTreeItemId& item) const


@@ -1329,6 +1321,11 @@ wxTreeItemId wxTreeCtrl::GetSelection() const
     wxCHECK_MSG( !HasFlag(wxTR_MULTIPLE), wxTreeItemId(),
                  wxT("this only works with single selection controls") );
 
     wxCHECK_MSG( !HasFlag(wxTR_MULTIPLE), wxTreeItemId(),
                  wxT("this only works with single selection controls") );
 

+    return GetFocusedItem();
+}
+
+wxTreeItemId wxTreeCtrl::GetFocusedItem() const
+{

     return wxTreeItemId(TreeView_GetSelection(GetHwnd()));
 }
 
     return wxTreeItemId(TreeView_GetSelection(GetHwnd()));
 }
 


@@ -1473,7 +1470,7 @@ wxTreeItemId wxTreeCtrl::DoInsertAfter(const wxTreeItemId& parent,
 {
     wxCHECK_MSG( parent.IsOk() || !TreeView_GetRoot(GetHwnd()),
                  wxTreeItemId(),
 {
     wxCHECK_MSG( parent.IsOk() || !TreeView_GetRoot(GetHwnd()),
                  wxTreeItemId(),

-                 _T("can't have more than one root in the tree") );
+                 wxT("can't have more than one root in the tree") );

 
     TV_INSERTSTRUCT tvIns;
     tvIns.hParent = HITEM(parent);
 
     TV_INSERTSTRUCT tvIns;
     tvIns.hParent = HITEM(parent);


@@ -1490,7 +1487,7 @@ wxTreeItemId wxTreeCtrl::DoInsertAfter(const wxTreeItemId& parent,
     if ( !text.empty() )
     {
         mask |= TVIF_TEXT;
     if ( !text.empty() )
     {
         mask |= TVIF_TEXT;

-        tvIns.item.pszText = (wxChar *)text.wx_str();  // cast is ok
+        tvIns.item.pszText = wxMSW_CONV_LPTSTR(text);

     }
     else
     {
     }
     else
     {


@@ -1530,9 +1527,10 @@ wxTreeItemId wxTreeCtrl::DoInsertAfter(const wxTreeItemId& parent,
     // need this to make the "[+]" appear
     if ( firstChild )
     {
     // need this to make the "[+]" appear
     if ( firstChild )
     {

-        RECT rect;
-        TreeView_GetItemRect(GetHwnd(), HITEM(parent), &rect, FALSE);
-        ::InvalidateRect(GetHwnd(), &rect, FALSE);
+        TVGetItemRectParam param;
+
+        wxTreeView_GetItemRect(GetHwnd(), HITEM(parent), param, FALSE);
+        ::InvalidateRect(GetHwnd(), &param.rect, FALSE);

     }
 
     // associate the application tree item with Win32 tree item handle
     }
 
     // associate the application tree item with Win32 tree item handle


@@ -1554,7 +1552,7 @@ wxTreeItemId wxTreeCtrl::AddRoot(const wxString& text,
 {
     if ( HasFlag(wxTR_HIDE_ROOT) )
     {
 {
     if ( HasFlag(wxTR_HIDE_ROOT) )
     {

-        wxASSERT_MSG( !m_pVirtualRoot, _T("tree can have only a single root") );
+        wxASSERT_MSG( !m_pVirtualRoot, wxT("tree can have only a single root") );

 
         // create a virtual root item, the parent for all the others
         wxTreeItemParam *param = new wxTreeItemParam;
 
         // create a virtual root item, the parent for all the others
         wxTreeItemParam *param = new wxTreeItemParam;


@@ -1595,7 +1593,7 @@ wxTreeItemId wxTreeCtrl::DoInsertItem(const wxTreeItemId& parent,
 
         // assert, not check: if the index is invalid, we will append the item
         // to the end
 
         // assert, not check: if the index is invalid, we will append the item
         // to the end

-        wxASSERT_MSG( index == 0, _T("bad index in wxTreeCtrl::InsertItem") );
+        wxASSERT_MSG( index == 0, wxT("bad index in wxTreeCtrl::InsertItem") );

     }
 
     return DoInsertAfter(parent, idPrev, text, image, selectedImage, data);
     }
 
     return DoInsertAfter(parent, idPrev, text, image, selectedImage, data);


@@ -1622,10 +1620,13 @@ void wxTreeCtrl::Delete(const wxTreeItemId& item)
             }
         }
 
             }
         }
 

-        if ( !TreeView_DeleteItem(GetHwnd(), HITEM(item)) )

         {
         {

-            wxLogLastError(wxT("TreeView_DeleteItem"));
-            return;
+            TempSetter set(m_changingSelection);
+            if ( !TreeView_DeleteItem(GetHwnd(), HITEM(item)) )
+            {
+                wxLogLastError(wxT("TreeView_DeleteItem"));
+                return;
+            }

         }
 
         if ( !selected )
         }
 
         if ( !selected )


@@ -1633,6 +1634,12 @@ void wxTreeCtrl::Delete(const wxTreeItemId& item)
             return;
         }
 
             return;
         }
 

+        if ( item == m_htSelStart )
+            m_htSelStart.Unset();
+
+        if ( item == m_htClickedItem )
+            m_htClickedItem.Unset();
+

         if ( next.IsOk() )
         {
             wxTreeEvent changingEvent(wxEVT_COMMAND_TREE_SEL_CHANGING, this, next);
         if ( next.IsOk() )
         {
             wxTreeEvent changingEvent(wxEVT_COMMAND_TREE_SEL_CHANGING, this, next);


@@ -1644,8 +1651,8 @@ void wxTreeCtrl::Delete(const wxTreeItemId& item)
             }
             else
             {
             }
             else
             {

-                ::SelectItem(GetHwnd(), HITEM(next), false);
-                TreeView_SelectItem(GetHwnd(), 0);
+                DoUnselectItem(next);
+                ClearFocusedItem();

             }
         }
     }
             }
         }
     }


@@ -1687,6 +1694,10 @@ void wxTreeCtrl::DeleteAllItems()
     // unlock tree selections on vista for the duration of this call
     TreeItemUnlocker unlock_all;
 
     // unlock tree selections on vista for the duration of this call
     TreeItemUnlocker unlock_all;
 

+    // invalidate all the items we store as they're going to become invalid
+    m_htSelStart =
+    m_htClickedItem = wxTreeItemId();
+

     // delete the "virtual" root item.
     if ( GET_VIRTUAL_ROOT() )
     {
     // delete the "virtual" root item.
     if ( GET_VIRTUAL_ROOT() )
     {


@@ -1787,7 +1798,7 @@ void wxTreeCtrl::Unselect()
 
         if ( IsTreeEventAllowed(changingEvent) )
         {
 
         if ( IsTreeEventAllowed(changingEvent) )
         {

-            TreeView_SelectItem(GetHwnd(), 0);
+            ClearFocusedItem();

 
             wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED,
                                      this, wxTreeItemId());
 
             wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED,
                                      this, wxTreeItemId());


@@ -1797,7 +1808,7 @@ void wxTreeCtrl::Unselect()
     }
     else
     {
     }
     else
     {

-        TreeView_SelectItem(GetHwnd(), 0);
+        ClearFocusedItem();

     }
 }
 
     }
 }
 


@@ -1808,7 +1819,7 @@ void wxTreeCtrl::DoUnselectAll()
 
     for ( size_t n = 0; n < count; n++ )
     {
 
     for ( size_t n = 0; n < count; n++ )
     {

-        ::UnselectItem(GetHwnd(), HITEM(selections[n]));
+        DoUnselectItem(selections[n]);

     }
 
     m_htSelStart.Unset();
     }
 
     m_htSelStart.Unset();


@@ -1827,7 +1838,6 @@ void wxTreeCtrl::UnselectAll()
         if ( IsTreeEventAllowed(changingEvent) )
         {
             DoUnselectAll();
         if ( IsTreeEventAllowed(changingEvent) )
         {
             DoUnselectAll();

-            TreeView_SelectItem(GetHwnd(), 0);

 
             wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED, this);
             changedEvent.m_itemOld = htFocus;
 
             wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED, this);
             changedEvent.m_itemOld = htFocus;


@@ -1840,12 +1850,53 @@ void wxTreeCtrl::UnselectAll()
     }
 }
 
     }
 }
 

+void wxTreeCtrl::DoSelectChildren(const wxTreeItemId& parent)
+{
+    DoUnselectAll();
+
+    wxTreeItemIdValue cookie;
+    wxTreeItemId child = GetFirstChild(parent, cookie);
+    while ( child.IsOk() )
+    {
+        DoSelectItem(child, true);
+        child = GetNextChild(child, cookie);
+    }
+}
+
+void wxTreeCtrl::SelectChildren(const wxTreeItemId& parent)
+{
+    wxCHECK_RET( HasFlag(wxTR_MULTIPLE),
+                 "this only works with multiple selection controls" );
+
+    HTREEITEM htFocus = (HTREEITEM)TreeView_GetSelection(GetHwnd());
+
+    wxTreeEvent changingEvent(wxEVT_COMMAND_TREE_SEL_CHANGING, this);
+    changingEvent.m_itemOld = htFocus;
+
+    if ( IsTreeEventAllowed(changingEvent) )
+    {
+        DoSelectChildren(parent);
+
+        wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED, this);
+        changedEvent.m_itemOld = htFocus;
+        (void)HandleTreeEvent(changedEvent);
+    }
+}
+
+void wxTreeCtrl::DoSelectItem(const wxTreeItemId& item, bool select)
+{
+    TempSetter set(m_changingSelection);
+
+    ::SelectItem(GetHwnd(), HITEM(item), select);
+}
+

 void wxTreeCtrl::SelectItem(const wxTreeItemId& item, bool select)
 {
 void wxTreeCtrl::SelectItem(const wxTreeItemId& item, bool select)
 {

-    wxCHECK_RET( !IsHiddenRoot(item), _T("can't select hidden root item") );
+    wxCHECK_RET( !IsHiddenRoot(item), wxT("can't select hidden root item") );

 
 

-    if ( IsSelected(item) == select )
+    if ( select == IsSelected(item) )

     {
     {

+        // nothing to do, the item is already in the requested state

         return;
     }
 
         return;
     }
 


@@ -1856,11 +1907,11 @@ void wxTreeCtrl::SelectItem(const wxTreeItemId& item, bool select)
         if ( IsTreeEventAllowed(changingEvent) )
         {
             HTREEITEM htFocus = (HTREEITEM)TreeView_GetSelection(GetHwnd());
         if ( IsTreeEventAllowed(changingEvent) )
         {
             HTREEITEM htFocus = (HTREEITEM)TreeView_GetSelection(GetHwnd());

-            ::SelectItem(GetHwnd(), HITEM(item), select);
+            DoSelectItem(item, select);

 
             if ( !htFocus )
             {
 
             if ( !htFocus )
             {

-                ::SetFocus(GetHwnd(), HITEM(item));
+                SetFocusedItem(item);

             }
 
             wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED,
             }
 
             wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED,


@@ -1868,20 +1919,33 @@ void wxTreeCtrl::SelectItem(const wxTreeItemId& item, bool select)
             (void)HandleTreeEvent(changedEvent);
         }
     }
             (void)HandleTreeEvent(changedEvent);
         }
     }

-    else
+    else // single selection

     {
     {

-        wxASSERT_MSG( select,
-                      _T("SelectItem(false) works only for multiselect") );
-
-        // in spite of the docs (MSDN Jan 99 edition), we don't seem to receive
-        // the notification from the control (i.e. TVN_SELCHANG{ED|ING}), so
-        // send them ourselves
+        wxTreeItemId itemOld, itemNew;
+        if ( select )
+        {
+            itemOld = GetSelection();
+            itemNew = item;
+        }
+        else // deselecting the currently selected item
+        {
+            itemOld = item;
+            // leave itemNew invalid
+        }

 
 

-        wxTreeEvent changingEvent(wxEVT_COMMAND_TREE_SEL_CHANGING, this, item);
+        // Recent versions of comctl32.dll send TVN_SELCHANG{ED,ING} events
+        // when we call TreeView_SelectItem() but apparently some old ones did
+        // not so send the events ourselves and ignore those generated by
+        // TreeView_SelectItem() if m_changingSelection is set.
+        wxTreeEvent
+            changingEvent(wxEVT_COMMAND_TREE_SEL_CHANGING, this, itemNew);
+        changingEvent.SetOldItem(itemOld);

 
         if ( IsTreeEventAllowed(changingEvent) )
         {
 
         if ( IsTreeEventAllowed(changingEvent) )
         {

-            if ( !TreeView_SelectItem(GetHwnd(), HITEM(item)) )
+            TempSetter set(m_changingSelection);
+
+            if ( !TreeView_SelectItem(GetHwnd(), HITEM(itemNew)) )

             {
                 wxLogLastError(wxT("TreeView_SelectItem"));
             }
             {
                 wxLogLastError(wxT("TreeView_SelectItem"));
             }


@@ -1890,7 +1954,8 @@ void wxTreeCtrl::SelectItem(const wxTreeItemId& item, bool select)
                 ::SetFocus(GetHwnd(), HITEM(item));
 
                 wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED,
                 ::SetFocus(GetHwnd(), HITEM(item));
 
                 wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED,

-                                         this, item);
+                                         this, itemNew);
+                changedEvent.SetOldItem(itemOld);

                 (void)HandleTreeEvent(changedEvent);
             }
         }
                 (void)HandleTreeEvent(changedEvent);
             }
         }


@@ -1900,7 +1965,7 @@ void wxTreeCtrl::SelectItem(const wxTreeItemId& item, bool select)
 
 void wxTreeCtrl::EnsureVisible(const wxTreeItemId& item)
 {
 
 void wxTreeCtrl::EnsureVisible(const wxTreeItemId& item)
 {

-    wxCHECK_RET( !IsHiddenRoot(item), _T("can't show hidden root item") );
+    wxCHECK_RET( !IsHiddenRoot(item), wxT("can't show hidden root item") );

 
     // no error return
     TreeView_EnsureVisible(GetHwnd(), HITEM(item));
 
     // no error return
     TreeView_EnsureVisible(GetHwnd(), HITEM(item));


@@ -1933,8 +1998,7 @@ void wxTreeCtrl::DeleteTextCtrl()
 
         m_textCtrl->UnsubclassWin();
         m_textCtrl->SetHWND(0);
 
         m_textCtrl->UnsubclassWin();
         m_textCtrl->SetHWND(0);

-        delete m_textCtrl;
-        m_textCtrl = NULL;
+        wxDELETE(m_textCtrl);

 
         m_idEdited.Unset();
     }
 
         m_idEdited.Unset();
     }


@@ -1943,7 +2007,7 @@ void wxTreeCtrl::DeleteTextCtrl()
 wxTextCtrl *wxTreeCtrl::EditLabel(const wxTreeItemId& item,
                                   wxClassInfo *textControlClass)
 {
 wxTextCtrl *wxTreeCtrl::EditLabel(const wxTreeItemId& item,
                                   wxClassInfo *textControlClass)
 {

-    wxASSERT( textControlClass->IsKindOf(CLASSINFO(wxTextCtrl)) );
+    wxASSERT( textControlClass->IsKindOf(wxCLASSINFO(wxTextCtrl)) );

 
     DeleteTextCtrl();
 
 
     DeleteTextCtrl();
 


@@ -1955,8 +2019,7 @@ wxTextCtrl *wxTreeCtrl::EditLabel(const wxTreeItemId& item,
     // returned false
     if ( !hWnd )
     {
     // returned false
     if ( !hWnd )
     {

-        delete m_textCtrl;
-        m_textCtrl = NULL;
+        wxDELETE(m_textCtrl);

         return NULL;
     }
 
         return NULL;
     }
 


@@ -2007,18 +2070,18 @@ bool wxTreeCtrl::GetBoundingRect(const wxTreeItemId& item,
                                  wxRect& rect,
                                  bool textOnly) const
 {
                                  wxRect& rect,
                                  bool textOnly) const
 {

-    RECT rc;
-

     // Virtual root items have no bounding rectangle
     if ( IS_VIRTUAL_ROOT(item) )
     {
         return false;
     }
 
     // Virtual root items have no bounding rectangle
     if ( IS_VIRTUAL_ROOT(item) )
     {
         return false;
     }
 

-    if ( TreeView_GetItemRect(GetHwnd(), HITEM(item),
-                              &rc, textOnly) )
+    TVGetItemRectParam param;
+
+    if ( wxTreeView_GetItemRect(GetHwnd(), HITEM(item), param, textOnly) )

     {
     {

-        rect = wxRect(wxPoint(rc.left, rc.top), wxPoint(rc.right, rc.bottom));
+        rect = wxRect(wxPoint(param.rect.left, param.rect.top),
+                      wxPoint(param.rect.right, param.rect.bottom));

 
         return true;
     }
 
         return true;
     }


@@ -2029,6 +2092,39 @@ bool wxTreeCtrl::GetBoundingRect(const wxTreeItemId& item,
     }
 }
 
     }
 }
 

+void wxTreeCtrl::ClearFocusedItem()
+{
+    TempSetter set(m_changingSelection);
+
+    if ( !TreeView_SelectItem(GetHwnd(), 0) )
+    {
+        wxLogLastError(wxT("TreeView_SelectItem"));
+    }
+}
+
+void wxTreeCtrl::SetFocusedItem(const wxTreeItemId& item)
+{
+    wxCHECK_RET( item.IsOk(), wxT("invalid tree item") );
+
+    TempSetter set(m_changingSelection);
+
+    ::SetFocus(GetHwnd(), HITEM(item));
+}
+
+void wxTreeCtrl::DoUnselectItem(const wxTreeItemId& item)
+{
+    TempSetter set(m_changingSelection);
+
+    ::UnselectItem(GetHwnd(), HITEM(item));
+}
+
+void wxTreeCtrl::DoToggleItemSelection(const wxTreeItemId& item)
+{
+    TempSetter set(m_changingSelection);
+
+    ::ToggleItemSelection(GetHwnd(), HITEM(item));
+}
+

 // ----------------------------------------------------------------------------
 // sorting stuff
 // ----------------------------------------------------------------------------
 // ----------------------------------------------------------------------------
 // sorting stuff
 // ----------------------------------------------------------------------------


@@ -2071,7 +2167,7 @@ void wxTreeCtrl::SortChildren(const wxTreeItemId& item)
     //     may be why as if you don't use the DECLARE_CLASS/IMPLEMENT_CLASS
     //     combo for your derived wxTreeCtrl if will sort without
     //     OnCompareItems
     //     may be why as if you don't use the DECLARE_CLASS/IMPLEMENT_CLASS
     //     combo for your derived wxTreeCtrl if will sort without
     //     OnCompareItems

-    if ( GetClassInfo() == CLASSINFO(wxTreeCtrl) )
+    if ( GetClassInfo() == wxCLASSINFO(wxTreeCtrl) )

     {
         TreeView_SortChildren(GetHwnd(), HITEM(item), 0);
     }
     {
         TreeView_SortChildren(GetHwnd(), HITEM(item), 0);
     }


@@ -2131,6 +2227,15 @@ bool wxTreeCtrl::MSWCommand(WXUINT cmd, WXWORD id_)
     return true;
 }
 
     return true;
 }
 

+bool wxTreeCtrl::MSWIsOnItem(unsigned flags) const
+{
+    unsigned mask = TVHT_ONITEM;
+    if ( HasFlag(wxTR_FULL_ROW_HIGHLIGHT) )
+        mask |= TVHT_ONITEMINDENT | TVHT_ONITEMRIGHT;
+
+    return (flags & mask) != 0;
+}
+

 bool wxTreeCtrl::MSWHandleSelectionKey(unsigned vkey)
 {
     const bool bCtrl = wxIsCtrlDown();
 bool wxTreeCtrl::MSWHandleSelectionKey(unsigned vkey)
 {
     const bool bCtrl = wxIsCtrlDown();


@@ -2152,7 +2257,7 @@ bool wxTreeCtrl::MSWHandleSelectionKey(unsigned vkey)
 
                 if ( IsTreeEventAllowed(changingEvent) )
                 {
 
                 if ( IsTreeEventAllowed(changingEvent) )
                 {

-                    ::ToggleItemSelection(GetHwnd(), htSel);
+                    DoToggleItemSelection(wxTreeItemId(htSel));

 
                     wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED,
                                              this, htSel);
 
                     wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED,
                                              this, htSel);


@@ -2174,7 +2279,7 @@ bool wxTreeCtrl::MSWHandleSelectionKey(unsigned vkey)
                     if ( IsTreeEventAllowed(changingEvent) )
                     {
                         DoUnselectAll();
                     if ( IsTreeEventAllowed(changingEvent) )
                     {
                         DoUnselectAll();

-                        ::SelectItem(GetHwnd(), htSel);
+                        DoSelectItem(wxTreeItemId(htSel));

 
                         wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED,
                                                  this, htSel);
 
                         wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED,
                                                  this, htSel);


@@ -2190,10 +2295,9 @@ bool wxTreeCtrl::MSWHandleSelectionKey(unsigned vkey)
             if ( !bCtrl && !bShift )
             {
                 wxArrayTreeItemIds selections;
             if ( !bCtrl && !bShift )
             {
                 wxArrayTreeItemIds selections;

-                size_t count = GetSelections(selections);

                 wxTreeItemId next;
 
                 wxTreeItemId next;
 

-                if ( htSel && count > 0 )
+                if ( htSel )

                 {
                     next = vkey == VK_UP
                             ? TreeView_GetPrevVisible(GetHwnd(), htSel)
                 {
                     next = vkey == VK_UP
                             ? TreeView_GetPrevVisible(GetHwnd(), htSel)


@@ -2205,14 +2309,6 @@ bool wxTreeCtrl::MSWHandleSelectionKey(unsigned vkey)
 
                     if ( IsHiddenRoot(next) )
                         next = TreeView_GetChild(GetHwnd(), HITEM(next));
 
                     if ( IsHiddenRoot(next) )
                         next = TreeView_GetChild(GetHwnd(), HITEM(next));

-
-                    if ( vkey == VK_DOWN )
-                    {
-                        wxTreeItemId next2 = TreeView_GetNextVisible(
-                                                GetHwnd(), HITEM(next));
-                        if ( next2 )
-                            next = next2;
-                    }

                 }
 
                 if ( !next.IsOk() )
                 }
 
                 if ( !next.IsOk() )


@@ -2227,8 +2323,8 @@ bool wxTreeCtrl::MSWHandleSelectionKey(unsigned vkey)
                 if ( IsTreeEventAllowed(changingEvent) )
                 {
                     DoUnselectAll();
                 if ( IsTreeEventAllowed(changingEvent) )
                 {
                     DoUnselectAll();

-                    ::SelectItem(GetHwnd(), HITEM(next));
-                    ::SetFocus(GetHwnd(), HITEM(next));
+                    DoSelectItem(next);
+                    SetFocusedItem(next);

 
                     wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED,
                                              this, next);
 
                     wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED,
                                              this, next);


@@ -2269,7 +2365,7 @@ bool wxTreeCtrl::MSWHandleSelectionKey(unsigned vkey)
                     }
                 }
 
                     }
                 }
 

-                ::SetFocus(GetHwnd(), HITEM(next));
+                SetFocusedItem(next);

             }
             break;
 
             }
             break;
 


@@ -2291,8 +2387,8 @@ bool wxTreeCtrl::MSWHandleSelectionKey(unsigned vkey)
                     if ( IsTreeEventAllowed(changingEvent) )
                     {
                         DoUnselectAll();
                     if ( IsTreeEventAllowed(changingEvent) )
                     {
                         DoUnselectAll();

-                        ::SelectItem(GetHwnd(), HITEM(next));
-                        ::SetFocus(GetHwnd(), HITEM(next));
+                        DoSelectItem(next);
+                        SetFocusedItem(next);

 
                         wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED,
                                                  this, next);
 
                         wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED,
                                                  this, next);


@@ -2326,8 +2422,8 @@ bool wxTreeCtrl::MSWHandleSelectionKey(unsigned vkey)
                 if ( IsTreeEventAllowed(changingEvent) )
                 {
                     DoUnselectAll();
                 if ( IsTreeEventAllowed(changingEvent) )
                 {
                     DoUnselectAll();

-                    ::SelectItem(GetHwnd(), HITEM(next));
-                    ::SetFocus(GetHwnd(), HITEM(next));
+                    DoSelectItem(next);
+                    SetFocusedItem(next);

 
                     wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED, this, next);
                     changedEvent.m_itemOld = htSel;
 
                     wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED, this, next);
                     changedEvent.m_itemOld = htSel;


@@ -2386,7 +2482,7 @@ bool wxTreeCtrl::MSWHandleSelectionKey(unsigned vkey)
                             SelectRange(GetHwnd(),
                                         HITEM(m_htSelStart), HITEM(next),
                                         SR_UNSELECT_OTHERS);
                             SelectRange(GetHwnd(),
                                         HITEM(m_htSelStart), HITEM(next),
                                         SR_UNSELECT_OTHERS);

-                            ::SetFocus(GetHwnd(), HITEM(next));
+                            SetFocusedItem(next);

 
                             wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED,
                                                      this, next);
 
                             wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED,
                                                      this, next);


@@ -2404,8 +2500,8 @@ bool wxTreeCtrl::MSWHandleSelectionKey(unsigned vkey)
                     if ( IsTreeEventAllowed(changingEvent) )
                     {
                         DoUnselectAll();
                     if ( IsTreeEventAllowed(changingEvent) )
                     {
                         DoUnselectAll();

-                        ::SelectItem(GetHwnd(), HITEM(next));
-                        ::SetFocus(GetHwnd(), HITEM(next));
+                        DoSelectItem(next);
+                        SetFocusedItem(next);

 
                         wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED,
                                                  this, next);
 
                         wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED,
                                                  this, next);


@@ -2507,8 +2603,8 @@ bool wxTreeCtrl::MSWHandleSelectionKey(unsigned vkey)
                 {
                     DoUnselectAll();
                     m_htSelStart.Unset();
                 {
                     DoUnselectAll();
                     m_htSelStart.Unset();

-                    ::SelectItem(GetHwnd(), HITEM(next));
-                    ::SetFocus(GetHwnd(), HITEM(next));
+                    DoSelectItem(next);
+                    SetFocusedItem(next);

 
                     wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED,
                                              this, next);
 
                     wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED,
                                              this, next);


@@ -2525,6 +2621,29 @@ bool wxTreeCtrl::MSWHandleSelectionKey(unsigned vkey)
     return true;
 }
 
     return true;
 }
 

+bool wxTreeCtrl::MSWHandleTreeKeyDownEvent(WXWPARAM wParam, WXLPARAM lParam)
+{
+    wxTreeEvent keyEvent(wxEVT_COMMAND_TREE_KEY_DOWN, this);
+    keyEvent.m_evtKey = CreateKeyEvent(wxEVT_KEY_DOWN, wParam, lParam);
+
+    bool processed = HandleTreeEvent(keyEvent);
+
+    // generate a separate event for Space/Return
+    if ( !wxIsCtrlDown() && !wxIsShiftDown() && !wxIsAltDown() &&
+         ((wParam == VK_SPACE) || (wParam == VK_RETURN)) )
+    {
+        const HTREEITEM htSel = (HTREEITEM)TreeView_GetSelection(GetHwnd());
+        if ( htSel )
+        {
+            wxTreeEvent activatedEvent(wxEVT_COMMAND_TREE_ITEM_ACTIVATED,
+                                       this, htSel);
+            (void)HandleTreeEvent(activatedEvent);
+        }
+    }
+
+    return processed;
+}
+

 // we hook into WndProc to process WM_MOUSEMOVE/WM_BUTTONUP messages - as we
 // only do it during dragging, minimize wxWin overhead (this is important for
 // WM_MOUSEMOVE as they're a lot of them) by catching Windows messages directly
 // we hook into WndProc to process WM_MOUSEMOVE/WM_BUTTONUP messages - as we
 // only do it during dragging, minimize wxWin overhead (this is important for
 // WM_MOUSEMOVE as they're a lot of them) by catching Windows messages directly


@@ -2577,13 +2696,16 @@ wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
         }
 
         // create the event
         }
 
         // create the event

-        wxTreeEvent event(wxEVT_COMMAND_TREE_ITEM_MENU, this, item);
+        if ( item.IsOk() )
+        {
+            wxTreeEvent event(wxEVT_COMMAND_TREE_ITEM_MENU, this, item);

 
 

-        event.m_pointDrag = pt;
+            event.m_pointDrag = pt;

 
 

-        if ( HandleTreeEvent(event) )
-            processed = true;
-        //else: continue with generating wxEVT_CONTEXT_MENU in base class code
+            if ( HandleTreeEvent(event) )
+                processed = true;
+            //else: continue with generating wxEVT_CONTEXT_MENU in base class code
+        }

     }
     else if ( (nMsg >= WM_MOUSEFIRST) && (nMsg <= WM_MOUSELAST) )
     {
     }
     else if ( (nMsg >= WM_MOUSEFIRST) && (nMsg <= WM_MOUSELAST) )
     {


@@ -2605,14 +2727,21 @@ wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
                 if ( !isMultiple )
                     break;
 
                 if ( !isMultiple )
                     break;
 

-                processed = true;

                 m_htClickedItem.Unset();
 
                 m_htClickedItem.Unset();
 

-                if ( !(tvht.flags & TVHT_ONITEM) )
+                if ( !MSWIsOnItem(tvht.flags) )

                 {
                 {

-                    if ( !HandleMouseEvent(nMsg, x, y, wParam) )
+                    if ( tvht.flags & TVHT_ONITEMBUTTON )

                     {
                     {

-                        if ( tvht.flags & TVHT_ONITEMBUTTON )
+                        // either it's going to be handled by user code or
+                        // we're going to use it ourselves to toggle the
+                        // branch, in either case don't pass it to the base
+                        // class which would generate another mouse click event
+                        // for it even though it's already handled here
+                        processed = true;
+                        SetFocus();
+
+                        if ( !HandleMouseEvent(nMsg, x, y, wParam) )

                         {
                             if ( !IsExpanded(htItem) )
                             {
                         {
                             if ( !IsExpanded(htItem) )
                             {


@@ -2625,9 +2754,11 @@ wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
                         }
                     }
 
                         }
                     }
 

+                    m_focusLost = false;

                     break;
                 }
 
                     break;
                 }
 

+                processed = true;

                 SetFocus();
                 m_htClickedItem = (WXHTREEITEM) htItem;
                 m_ptClick = wxPoint(x, y);
                 SetFocus();
                 m_htClickedItem = (WXHTREEITEM) htItem;
                 m_ptClick = wxPoint(x, y);


@@ -2647,9 +2778,9 @@ wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
                     if ( IsTreeEventAllowed(changingEvent) )
                     {
                         // toggle selected state
                     if ( IsTreeEventAllowed(changingEvent) )
                     {
                         // toggle selected state

-                        ::ToggleItemSelection(GetHwnd(), htItem);
+                        DoToggleItemSelection(wxTreeItemId(htItem));

 
 

-                        ::SetFocus(GetHwnd(), htItem);
+                        SetFocusedItem(wxTreeItemId(htItem));

 
                         // reset on any click without Shift
                         m_htSelStart.Unset();
 
                         // reset on any click without Shift
                         m_htSelStart.Unset();


@@ -2704,10 +2835,10 @@ wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
                             }
                             else
                             {
                             }
                             else
                             {

-                                ::SelectItem(GetHwnd(), htItem);
+                                DoSelectItem(wxTreeItemId(htItem));

                             }
 
                             }
 

-                            ::SetFocus(GetHwnd(), htItem);
+                            SetFocusedItem(wxTreeItemId(htItem));

 
                             wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED,
                                                      this, htItem);
 
                             wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED,
                                                      this, htItem);


@@ -2738,7 +2869,6 @@ wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
                         // clicked outside of the present selection, otherwise,
                         // perform the deselection on mouse-up, this allows
                         // multiple drag and drop to work.
                         // clicked outside of the present selection, otherwise,
                         // perform the deselection on mouse-up, this allows
                         // multiple drag and drop to work.

-

                         if ( !IsItemSelected(GetHwnd(), htItem))
                         {
                             wxTreeEvent changingEvent(wxEVT_COMMAND_TREE_SEL_CHANGING,
                         if ( !IsItemSelected(GetHwnd(), htItem))
                         {
                             wxTreeEvent changingEvent(wxEVT_COMMAND_TREE_SEL_CHANGING,


@@ -2748,8 +2878,8 @@ wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
                             if ( IsTreeEventAllowed(changingEvent) )
                             {
                                 DoUnselectAll();
                             if ( IsTreeEventAllowed(changingEvent) )
                             {
                                 DoUnselectAll();

-                                ::SelectItem(GetHwnd(), htItem);
-                                ::SetFocus(GetHwnd(), htItem);
+                                DoSelectItem(wxTreeItemId(htItem));
+                                SetFocusedItem(wxTreeItemId(htItem));

 
                                 wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED,
                                                          this, htItem);
 
                                 wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED,
                                                          this, htItem);


@@ -2759,7 +2889,8 @@ wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
                         }
                         else
                         {
                         }
                         else
                         {

-                            ::SetFocus(GetHwnd(), htItem);
+                            SetFocusedItem(wxTreeItemId(htItem));
+                            m_mouseUpDeselect = true;

                         }
                     }
                     else // click on a single selected item
                         }
                     }
                     else // click on a single selected item


@@ -2774,11 +2905,14 @@ wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
                         // since previous click
                         if ( m_focusLost )
                         {
                         // since previous click
                         if ( m_focusLost )
                         {

-                            TreeView_SelectItem(GetHwnd(), 0);
-                            ::SelectItem(GetHwnd(), htItem);
+                            ClearFocusedItem();
+                            DoSelectItem(wxTreeItemId(htItem));
+                            SetFocusedItem(wxTreeItemId(htItem));
+                        }
+                        else
+                        {
+                            processed = false;

                         }
                         }

-
-                        processed = false;

                     }
 
                     // reset on any click without Shift
                     }
 
                     // reset on any click without Shift


@@ -2791,10 +2925,7 @@ wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
                 // click if needed
                 if ( processed )
                 {
                 // click if needed
                 if ( processed )
                 {

-                    int htFlags = 0;
-                    wxTreeItemId item = HitTest(wxPoint(x, y), htFlags);
-
-                    if ( htFlags & wxTREE_HITTEST_ONITEMSTATEICON )
+                    if ( tvht.flags & TVHT_ONITEMSTATEICON )

                     {
                         m_triggerStateImageClick = true;
                     }
                     {
                         m_triggerStateImageClick = true;
                     }


@@ -2826,8 +2957,8 @@ wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
                     if ( IsTreeEventAllowed(changingEvent) )
                     {
                         DoUnselectAll();
                     if ( IsTreeEventAllowed(changingEvent) )
                     {
                         DoUnselectAll();

-                        ::SelectItem(GetHwnd(), htItem);
-                        ::SetFocus(GetHwnd(), htItem);
+                        DoSelectItem(wxTreeItemId(htItem));
+                        SetFocusedItem(wxTreeItemId(htItem));

 
                         wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED,
                                                  this, htItem);
 
                         wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED,
                                                  this, htItem);


@@ -2906,16 +3037,13 @@ wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
             case WM_LBUTTONUP:
                 if ( isMultiple )
                 {
             case WM_LBUTTONUP:
                 if ( isMultiple )
                 {

-                    // deselect other items if multiple items selected
+                    // deselect other items if needed

                     if ( htItem )
                     {
                     if ( htItem )
                     {

-                        wxArrayTreeItemIds selections;
-                        size_t count = GetSelections(selections);
-
-                        if ( count > 1 &&
-                             !(wParam & MK_CONTROL) &&
-                             !(wParam & MK_SHIFT) )
+                        if ( m_mouseUpDeselect )

                         {
                         {

+                            m_mouseUpDeselect = false;
+

                             wxTreeEvent changingEvent(wxEVT_COMMAND_TREE_SEL_CHANGING,
                                                       this, htItem);
                             changingEvent.m_itemOld = htOldItem;
                             wxTreeEvent changingEvent(wxEVT_COMMAND_TREE_SEL_CHANGING,
                                                       this, htItem);
                             changingEvent.m_itemOld = htOldItem;


@@ -2923,8 +3051,8 @@ wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
                             if ( IsTreeEventAllowed(changingEvent) )
                             {
                                 DoUnselectAll();
                             if ( IsTreeEventAllowed(changingEvent) )
                             {
                                 DoUnselectAll();

-                                ::SelectItem(GetHwnd(), htItem);
-                                ::SetFocus(GetHwnd(), htItem);
+                                DoSelectItem(wxTreeItemId(htItem));
+                                SetFocusedItem(wxTreeItemId(htItem));

 
                                 wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED,
                                                          this, htItem);
 
                                 wxTreeEvent changedEvent(wxEVT_COMMAND_TREE_SEL_CHANGED,
                                                          this, htItem);


@@ -2949,10 +3077,7 @@ wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
                         }
                     }
 
                         }
                     }
 

-                    if ( !m_dragStarted &&
-                         (tvht.flags & TVHT_ONITEMSTATEICON ||
-                          tvht.flags & TVHT_ONITEMICON ||
-                          tvht.flags & TVHT_ONITEM) )
+                    if ( !m_dragStarted && MSWIsOnItem(tvht.flags) )

                     {
                         processed = true;
                     }
                     {
                         processed = true;
                     }


@@ -2965,8 +3090,7 @@ wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
                 if ( m_dragImage )
                 {
                     m_dragImage->EndDrag();
                 if ( m_dragImage )
                 {
                     m_dragImage->EndDrag();

-                    delete m_dragImage;
-                    m_dragImage = NULL;
+                    wxDELETE(m_dragImage);

 
                     // generate the drag end event
                     wxTreeEvent event(wxEVT_COMMAND_TREE_END_DRAG,
 
                     // generate the drag end event
                     wxTreeEvent event(wxEVT_COMMAND_TREE_END_DRAG,


@@ -3006,16 +3130,16 @@ wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
             // do it for the other items itself - help it
             wxArrayTreeItemIds selections;
             size_t count = GetSelections(selections);
             // do it for the other items itself - help it
             wxArrayTreeItemIds selections;
             size_t count = GetSelections(selections);

-            RECT rect;
+            TVGetItemRectParam param;

 
             for ( size_t n = 0; n < count; n++ )
             {
                 // TreeView_GetItemRect() will return false if item is not
                 // visible, which may happen perfectly well
 
             for ( size_t n = 0; n < count; n++ )
             {
                 // TreeView_GetItemRect() will return false if item is not
                 // visible, which may happen perfectly well

-                if ( TreeView_GetItemRect(GetHwnd(), HITEM(selections[n]),
-                                          &rect, TRUE) )
+                if ( wxTreeView_GetItemRect(GetHwnd(), HITEM(selections[n]),
+                                            param, TRUE) )

                 {
                 {

-                    ::InvalidateRect(GetHwnd(), &rect, FALSE);
+                    ::InvalidateRect(GetHwnd(), &param.rect, FALSE);

                 }
             }
         }
                 }
             }
         }


@@ -3027,39 +3151,38 @@ wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
     }
     else if ( (nMsg == WM_KEYDOWN || nMsg == WM_SYSKEYDOWN) && isMultiple )
     {
     }
     else if ( (nMsg == WM_KEYDOWN || nMsg == WM_SYSKEYDOWN) && isMultiple )
     {

-        wxTreeEvent keyEvent(wxEVT_COMMAND_TREE_KEY_DOWN, this);
-
-        int keyCode = wxCharCodeMSWToWX(wParam);
-
-        if ( !keyCode )
+        // normally we want to generate wxEVT_KEY_DOWN events from TVN_KEYDOWN
+        // notification but for the keys which can be used to change selection
+        // we need to do it from here so as to not apply the default behaviour
+        // if the events are handled by the user code
+        switch ( wParam )

         {
         {

-            // wxCharCodeMSWToWX() returns 0 to indicate that this is a
-            // simple ASCII key
-            keyCode = wParam;
-        }
+            case VK_RETURN:
+            case VK_SPACE:
+            case VK_UP:
+            case VK_DOWN:
+            case VK_LEFT:
+            case VK_RIGHT:
+            case VK_HOME:
+            case VK_END:
+            case VK_PRIOR:
+            case VK_NEXT:
+                if ( !HandleKeyDown(wParam, lParam) &&
+                        !MSWHandleTreeKeyDownEvent(wParam, lParam) )
+                {
+                    // use the key to update the selection if it was left
+                    // unprocessed
+                    MSWHandleSelectionKey(wParam);
+                }

 
 

-        keyEvent.m_evtKey = CreateKeyEvent(wxEVT_KEY_DOWN, keyCode,
-                                           lParam, wParam);
+                // pretend that we did process it in any case as we already
+                // generated an event for it
+                processed = true;

 
 

-        processed = HandleTreeEvent(keyEvent);
-        if ( !processed )
-        {
-            // update the selection if key was left unprocessed
-            processed = MSWHandleSelectionKey(wParam);
+            //default: for all the other keys leave processed as false so that
+            //         the tree control generates a TVN_KEYDOWN for us

         }
 
         }
 

-        // generate a separate event for Space/Return
-        if ( !wxIsCtrlDown() && !wxIsShiftDown() && !wxIsAltDown() &&
-             ((wParam == VK_SPACE) || (wParam == VK_RETURN)) )
-        {
-            const HTREEITEM htSel = (HTREEITEM)TreeView_GetSelection(GetHwnd());
-            if ( htSel )
-            {
-                wxTreeEvent activatedEvent(wxEVT_COMMAND_TREE_ITEM_ACTIVATED,
-                                           this, htSel);
-                (void)HandleTreeEvent(activatedEvent);
-            }
-        }

     }
     else if ( nMsg == WM_COMMAND )
     {
     }
     else if ( nMsg == WM_COMMAND )
     {


@@ -3107,8 +3230,7 @@ wxTreeCtrl::MSWDefWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
             if ( m_dragImage )
             {
                 m_dragImage->EndDrag();
             if ( m_dragImage )
             {
                 m_dragImage->EndDrag();

-                delete m_dragImage;
-                m_dragImage = NULL;
+                wxDELETE(m_dragImage);

 
                 // if we don't do it, the tree seems to think that 2 items
                 // are selected simultaneously which is quite weird
 
                 // if we don't do it, the tree seems to think that 2 items
                 // are selected simultaneously which is quite weird


@@ -3276,45 +3398,9 @@ bool wxTreeCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
                 // fabricate the lParam and wParam parameters sufficiently
                 // similar to the ones from a "real" WM_KEYDOWN so that
                 // CreateKeyEvent() works correctly
                 // fabricate the lParam and wParam parameters sufficiently
                 // similar to the ones from a "real" WM_KEYDOWN so that
                 // CreateKeyEvent() works correctly

-                const bool isAltDown = ::GetKeyState(VK_MENU) < 0;
-                WXLPARAM lParam = (isAltDown ? KF_ALTDOWN : 0) << 16;
-
-                WXWPARAM wParam = info->wVKey;
-
-                int keyCode = wxCharCodeMSWToWX(wParam);
-                if ( !keyCode )
-                {
-                    // wxCharCodeMSWToWX() returns 0 to indicate that this is a
-                    // simple ASCII key
-                    keyCode = wParam;
-                }
-
-                wxTreeEvent keyEvent(wxEVT_COMMAND_TREE_KEY_DOWN, this);
-                keyEvent.m_evtKey = CreateKeyEvent(wxEVT_KEY_DOWN,
-                                                keyCode,
-                                                lParam,
-                                                wParam);
-
-                if ( HandleTreeEvent(keyEvent) )
-                {
-                    return true;
-                }
-
-                wxTreeItemId item = wxTreeItemId(TreeView_GetSelection(GetHwnd()));
-
-                // a separate event for Space/Return
-                if ( !wxIsCtrlDown() && !wxIsShiftDown() && !isAltDown &&
-                     ((info->wVKey == VK_SPACE) || (info->wVKey == VK_RETURN)) &&
-                     item )
-                {
-                    wxTreeEvent activatedEvent(wxEVT_COMMAND_TREE_ITEM_ACTIVATED,
-                                       this, item);
-                    (void)HandleTreeEvent(activatedEvent);
-                }
-
-                return false;
+                return MSWHandleTreeKeyDownEvent(
+                        info->wVKey, (wxIsAltDown() ? KF_ALTDOWN : 0) << 16);

             }
             }

-            break;

 
 
         // Vista's tree control has introduced some problems with our
 
 
         // Vista's tree control has introduced some problems with our


@@ -3322,7 +3408,7 @@ bool wxTreeCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
         // the wrong items are deselected.
 
         // Fortunately, Vista provides a new notification, TVN_ITEMCHANGING
         // the wrong items are deselected.
 
         // Fortunately, Vista provides a new notification, TVN_ITEMCHANGING

-        // that can be used to regulate this incorrect behavior.  The
+        // that can be used to regulate this incorrect behaviour.  The

         // following messages will allow only the unlocked item's selection
         // state to change
 
         // following messages will allow only the unlocked item's selection
         // state to change
 


@@ -3352,7 +3438,7 @@ bool wxTreeCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
         //     we have to handle both messages:
         case TVN_SELCHANGEDA:
         case TVN_SELCHANGEDW:
         //     we have to handle both messages:
         case TVN_SELCHANGEDA:
         case TVN_SELCHANGEDW:

-            if ( !HasFlag(wxTR_MULTIPLE) )
+            if ( !m_changingSelection )

             {
                 eventType = wxEVT_COMMAND_TREE_SEL_CHANGED;
             }
             {
                 eventType = wxEVT_COMMAND_TREE_SEL_CHANGED;
             }


@@ -3360,7 +3446,7 @@ bool wxTreeCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
 
         case TVN_SELCHANGINGA:
         case TVN_SELCHANGINGW:
 
         case TVN_SELCHANGINGA:
         case TVN_SELCHANGINGW:

-            if ( !HasFlag(wxTR_MULTIPLE) )
+            if ( !m_changingSelection )

             {
                 if ( eventType == wxEVT_NULL )
                     eventType = wxEVT_COMMAND_TREE_SEL_CHANGING;
             {
                 if ( eventType == wxEVT_NULL )
                     eventType = wxEVT_COMMAND_TREE_SEL_CHANGING;


@@ -3392,12 +3478,13 @@ bool wxTreeCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
             //
             // to avoid such surprises, we force the generation of focus events
             // now, before we generate the selection change ones
             //
             // to avoid such surprises, we force the generation of focus events
             // now, before we generate the selection change ones

-            SetFocus();
+            if ( !m_changingSelection && !m_isBeingDeleted )
+                SetFocus();

             break;
 
         // instead of explicitly checking for _WIN32_IE, check if the
         // required symbols are available in the headers
             break;
 
         // instead of explicitly checking for _WIN32_IE, check if the
         // required symbols are available in the headers

-#if defined(CDDS_PREPAINT) && !wxUSE_COMCTL32_SAFELY
+#if defined(CDDS_PREPAINT)

         case NM_CUSTOMDRAW:
             {
                 LPNMTVCUSTOMDRAW lptvcd = (LPNMTVCUSTOMDRAW)lParam;
         case NM_CUSTOMDRAW:
             {
                 LPNMTVCUSTOMDRAW lptvcd = (LPNMTVCUSTOMDRAW)lParam;


@@ -3424,9 +3511,12 @@ bool wxTreeCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
 
                             if ( !loaded )
                             {
 
                             if ( !loaded )
                             {

-                                wxLoadedDLL dllComCtl32(_T("comctl32.dll"));
+                                wxLoadedDLL dllComCtl32(wxT("comctl32.dll"));

                                 if ( dllComCtl32.IsLoaded() )
                                 if ( dllComCtl32.IsLoaded() )

+                                {

                                     wxDL_INIT_FUNC(s_pfn, ImageList_Copy, dllComCtl32);
                                     wxDL_INIT_FUNC(s_pfn, ImageList_Copy, dllComCtl32);

+                                    loaded = true;
+                                }

                             }
 
                             if ( !s_pfnImageList_Copy )
                             }
 
                             if ( !s_pfnImageList_Copy )


@@ -3568,11 +3658,11 @@ bool wxTreeCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
         case NM_RCLICK:
             {
                 TV_HITTESTINFO tvhti;
         case NM_RCLICK:
             {
                 TV_HITTESTINFO tvhti;

-                ::GetCursorPos(&tvhti.pt);
+                wxGetCursorPosMSW(&tvhti.pt);

                 ::ScreenToClient(GetHwnd(), &tvhti.pt);
                 if ( TreeView_HitTest(GetHwnd(), &tvhti) )
                 {
                 ::ScreenToClient(GetHwnd(), &tvhti.pt);
                 if ( TreeView_HitTest(GetHwnd(), &tvhti) )
                 {

-                    if ( tvhti.flags & TVHT_ONITEM )
+                    if ( MSWIsOnItem(tvhti.flags) )

                     {
                         event.m_item = tvhti.hItem;
                         eventType = (int)hdr->code == NM_DBLCLK
                     {
                         event.m_item = tvhti.hItem;
                         eventType = (int)hdr->code == NM_DBLCLK


@@ -3626,7 +3716,7 @@ bool wxTreeCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
             {
                 // normally this is impossible because the m_dragImage is
                 // deleted once the drag operation is over
             {
                 // normally this is impossible because the m_dragImage is
                 // deleted once the drag operation is over

-                wxASSERT_MSG( !m_dragImage, _T("starting to drag once again?") );
+                wxASSERT_MSG( !m_dragImage, wxT("starting to drag once again?") );

 
                 m_dragImage = new wxDragImage(*this, event.m_item);
                 m_dragImage->BeginDrag(wxPoint(0,0), this);
 
                 m_dragImage = new wxDragImage(*this, event.m_item);
                 m_dragImage->BeginDrag(wxPoint(0,0), this);


@@ -3833,4 +3923,32 @@ void wxTreeCtrl::DoSetItemState(const wxTreeItemId& item, int state)
     DoSetItem(&tvItem);
 }
 
     DoSetItem(&tvItem);
 }
 

+// ----------------------------------------------------------------------------
+// Update locking.
+// ----------------------------------------------------------------------------
+
+// Using WM_SETREDRAW with the native control is a bad idea as it's broken in
+// some Windows versions (see http://support.microsoft.com/kb/130611) and
+// doesn't seem to do anything in other ones (e.g. under Windows 7 the tree
+// control keeps updating its scrollbars while the items are added to it,
+// resulting in horrible flicker when adding even a couple of dozen items).
+// So we hide it instead of freezing -- this still flickers, but actually not
+// as badly as it would if we didn't do it.
+
+void wxTreeCtrl::DoFreeze()
+{
+    // Notice that we don't call wxWindow::Hide() here as we want the window to
+    // remain shown from wxWidgets point of view and also because
+    // wxWindowMSW::Show() calls Do{Freeze,Thaw}() itself, so we'd get into
+    // infinite recursion this way.
+    if ( IsShown() )
+        ::ShowWindow(GetHwnd(), SW_HIDE);
+}
+
+void wxTreeCtrl::DoThaw()
+{
+    if ( IsShown() )
+        ::ShowWindow(GetHwnd(), SW_SHOW);
+}
+

 #endif // wxUSE_TREECTRL
 #endif // wxUSE_TREECTRL