]> git.saurik.com Git - wxWidgets.git/blobdiff - src/msw/treectrl.cpp
include wx/crt.h needed for wxFprintf() (closes #9509)
[wxWidgets.git] / src / msw / treectrl.cpp
index 0643a209e2709e33ee367c77d5b1b760238ee514..3093583d52ad26a2a4852699c2211ab5fc47f431 100644 (file)
 // get HTREEITEM from wxTreeItemId
 #define HITEM(item)     ((HTREEITEM)(((item).m_pItem)))
 
+
+// older SDKs are missing these
+#ifndef TVN_ITEMCHANGINGA
+
+#define TVN_ITEMCHANGINGA (TVN_FIRST-16)
+#define TVN_ITEMCHANGINGW (TVN_FIRST-17)
+
+typedef struct tagNMTVITEMCHANGE
+{
+    NMHDR hdr;
+    UINT uChanged;
+    HTREEITEM hItem;
+    UINT uStateNew;
+    UINT uStateOld;
+    LPARAM lParam;
+} NMTVITEMCHANGE;
+
+#endif
+
+
+// this helper class is used on vista systems for preventing unwanted
+// item state changes in the vista tree control.  It is only effective in
+// multi-select mode on vista systems.
+
+// 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
+// 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; }
+
+    // unlock all items, don't use unless absolutely necessary
+    TreeItemUnlocker() { ms_unlockedItem = (HTREEITEM)-1; }
+
+    // lock everything back
+    ~TreeItemUnlocker() { ms_unlockedItem = NULL; }
+
+
+    // check if the item state is currently locked
+    static bool IsLocked(HTREEITEM item)
+        { return ms_unlockedItem != (HTREEITEM)-1 && item != ms_unlockedItem; }
+
+private:
+    static HTREEITEM ms_unlockedItem;
+};
+
+HTREEITEM TreeItemUnlocker::ms_unlockedItem = NULL;
+
 // ----------------------------------------------------------------------------
 // private functions
 // ----------------------------------------------------------------------------
@@ -65,6 +118,8 @@ static bool IsItemSelected(HWND hwndTV, HTREEITEM hItem)
     tvi.stateMask = TVIS_SELECTED;
     tvi.hItem = hItem;
 
+    TreeItemUnlocker unlocker(hItem);
+
     if ( !TreeView_GetItem(hwndTV, &tvi) )
     {
         wxLogLastError(wxT("TreeView_GetItem"));
@@ -81,6 +136,8 @@ static bool SelectItem(HWND hwndTV, HTREEITEM hItem, bool select = true)
     tvi.state = select ? TVIS_SELECTED : 0;
     tvi.hItem = hItem;
 
+    TreeItemUnlocker unlocker(hItem);
+
     if ( TreeView_SetItem(hwndTV, &tvi) == -1 )
     {
         wxLogLastError(wxT("TreeView_SetItem"));
@@ -95,11 +152,6 @@ static inline void UnselectItem(HWND hwndTV, HTREEITEM htItem)
     SelectItem(hwndTV, htItem, false);
 }
 
-static inline void ToggleItemSelection(HWND hwndTV, HTREEITEM htItem)
-{
-    SelectItem(hwndTV, htItem, !IsItemSelected(hwndTV, htItem));
-}
-
 // helper function which selects all items in a range and, optionally,
 // unselects all others
 static void SelectRange(HWND hwndTV,
@@ -168,57 +220,56 @@ static void SelectRange(HWND hwndTV,
 // helper function which tricks the standard control into changing the focused
 // item without changing anything else (if someone knows why Microsoft doesn't
 // allow to do it by just setting TVIS_FOCUSED flag, please tell me!)
-static void SetFocus(HWND hwndTV, HTREEITEM htItem)
+//
+// returns true if the focus was changed, false if the given item was already
+// the focused one
+static bool SetFocus(HWND hwndTV, HTREEITEM htItem)
 {
     // the current focus
     HTREEITEM htFocus = (HTREEITEM)TreeView_GetSelection(hwndTV);
 
+    if ( htItem == htFocus )
+        return false;
+
     if ( htItem )
     {
-        // set the focus
-        if ( htItem != htFocus )
-        {
-            // remember the selection state of the item
-            bool wasSelected = IsItemSelected(hwndTV, htItem);
+        // remember the selection state of the item
+        bool wasSelected = IsItemSelected(hwndTV, htItem);
 
-            if ( htFocus && IsItemSelected(hwndTV, htFocus) )
-            {
-                // prevent the tree from unselecting the old focus which it
-                // would do by default (TreeView_SelectItem unselects the
-                // focused item)
-                TreeView_SelectItem(hwndTV, 0);
-                SelectItem(hwndTV, htFocus);
-            }
+        if ( htFocus && IsItemSelected(hwndTV, htFocus) )
+        {
+            // prevent the tree from unselecting the old focus which it
+            // would do by default (TreeView_SelectItem unselects the
+            // focused item)
+            TreeView_SelectItem(hwndTV, 0);
+            SelectItem(hwndTV, htFocus);
+        }
 
-            TreeView_SelectItem(hwndTV, htItem);
+        TreeView_SelectItem(hwndTV, htItem);
 
-            if ( !wasSelected )
-            {
-                // need to clear the selection which TreeView_SelectItem() gave
-                // us
-                UnselectItem(hwndTV, htItem);
-            }
-            //else: was selected, still selected - ok
+        if ( !wasSelected )
+        {
+            // need to clear the selection which TreeView_SelectItem() gave
+            // us
+            UnselectItem(hwndTV, htItem);
         }
-        //else: nothing to do, focus already there
+        //else: was selected, still selected - ok
     }
-    else
+    else // reset focus
     {
-        if ( htFocus )
-        {
-            bool wasFocusSelected = IsItemSelected(hwndTV, htFocus);
+        bool wasFocusSelected = IsItemSelected(hwndTV, htFocus);
 
-            // just clear the focus
-            TreeView_SelectItem(hwndTV, 0);
+        // just clear the focus
+        TreeView_SelectItem(hwndTV, 0);
 
-            if ( wasFocusSelected )
-            {
-                // restore the selection state
-                SelectItem(hwndTV, htFocus);
-            }
+        if ( wasFocusSelected )
+        {
+            // restore the selection state
+            SelectItem(hwndTV, htFocus);
         }
-        //else: nothing to do, no focus already
     }
+
+    return true;
 }
 
 // ----------------------------------------------------------------------------
@@ -526,7 +577,9 @@ wxBEGIN_FLAGS( wxTreeCtrlStyle )
     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 )
@@ -622,7 +675,9 @@ void wxTreeCtrl::Init()
 {
     m_textCtrl = NULL;
     m_hasAnyAttr = false;
+#if wxUSE_DRAGIMAGE
     m_dragImage = NULL;
+#endif
     m_pVirtualRoot = NULL;
 
     // initialize the global array of events now as it can't be done statically
@@ -806,6 +861,8 @@ bool wxTreeCtrl::DoGetItem(wxTreeViewItem *tvItem) const
 
 void wxTreeCtrl::DoSetItem(wxTreeViewItem *tvItem)
 {
+    TreeItemUnlocker unlocker(tvItem->hItem);
+
     if ( TreeView_SetItem(GetHwnd(), tvItem) == -1 )
     {
         wxLogLastError(wxT("TreeView_SetItem"));
@@ -923,7 +980,7 @@ void wxTreeCtrl::SetItemText(const wxTreeItemId& item, const wxString& text)
         return;
 
     wxTreeViewItem tvItem(item, TVIF_TEXT);
-    tvItem.pszText = (wxChar *)text.c_str();  // conversion is ok
+    tvItem.pszText = (wxChar *)text.wx_str();  // conversion is ok
     DoSetItem(&tvItem);
 
     // when setting the text of the item being edited, the text control should
@@ -936,7 +993,7 @@ void wxTreeCtrl::SetItemText(const wxTreeItemId& item, const wxString& text)
     {
         if ( item == m_idEdited )
         {
-            ::SetWindowText(hwndEdit, text);
+            ::SetWindowText(hwndEdit, text.wx_str());
         }
     }
 }
@@ -1165,7 +1222,7 @@ void wxTreeCtrl::SetItemFont(const wxTreeItemId& item, const wxFont& font)
     // Reset the item's text to ensure that the bounding rect will be adjusted
     // for the new font.
     SetItemText(item, GetItemText(item));
-    
+
     RefreshItem(item);
 }
 
@@ -1316,36 +1373,6 @@ wxTreeItemId wxTreeCtrl::GetNextChild(const wxTreeItemId& WXUNUSED(item),
     return item;
 }
 
-#if WXWIN_COMPATIBILITY_2_4
-
-wxTreeItemId wxTreeCtrl::GetFirstChild(const wxTreeItemId& item,
-                                       long& cookie) const
-{
-    wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
-
-    cookie = (long)TreeView_GetChild(GetHwnd(), HITEM(item));
-
-    return wxTreeItemId((void *)cookie);
-}
-
-wxTreeItemId wxTreeCtrl::GetNextChild(const wxTreeItemId& WXUNUSED(item),
-                                      long& cookie) const
-{
-    wxTreeItemId fromCookie((void *)cookie);
-
-    HTREEITEM hitem = HITEM(fromCookie);
-
-    hitem = TreeView_GetNextSibling(GetHwnd(), hitem);
-
-    wxTreeItemId item(hitem);
-
-    cookie = (long)item.m_pItem;
-
-    return item;
-}
-
-#endif // WXWIN_COMPATIBILITY_2_4
-
 wxTreeItemId wxTreeCtrl::GetLastChild(const wxTreeItemId& item) const
 {
     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
@@ -1386,7 +1413,15 @@ wxTreeItemId wxTreeCtrl::GetNextVisible(const wxTreeItemId& item) const
     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
     wxASSERT_MSG( IsVisible(item), wxT("The item you call GetNextVisible() for must be visible itself!"));
 
-    return wxTreeItemId(TreeView_GetNextVisible(GetHwnd(), HITEM(item)));
+    wxTreeItemId next(TreeView_GetNextVisible(GetHwnd(), HITEM(item)));
+    if ( next.IsOk() && !IsVisible(next) )
+    {
+        // Win32 considers that any non-collapsed item is visible while we want
+        // to return only really visible items
+        next.Unset();
+    }
+
+    return next;
 }
 
 wxTreeItemId wxTreeCtrl::GetPrevVisible(const wxTreeItemId& item) const
@@ -1394,7 +1429,15 @@ wxTreeItemId wxTreeCtrl::GetPrevVisible(const wxTreeItemId& item) const
     wxCHECK_MSG( item.IsOk(), wxTreeItemId(), wxT("invalid tree item") );
     wxASSERT_MSG( IsVisible(item), wxT("The item you call GetPrevVisible() for must be visible itself!"));
 
-    return wxTreeItemId(TreeView_GetPrevVisible(GetHwnd(), HITEM(item)));
+    wxTreeItemId prev(TreeView_GetPrevVisible(GetHwnd(), HITEM(item)));
+    if ( prev.IsOk() && !IsVisible(prev) )
+    {
+        // just as above, Win32 function will happily return the previous item
+        // in the tree for the first visible item too
+        prev.Unset();
+    }
+
+    return prev;
 }
 
 // ----------------------------------------------------------------------------
@@ -1464,7 +1507,7 @@ wxTreeItemId wxTreeCtrl::DoInsertAfter(const wxTreeItemId& parent,
     if ( !text.empty() )
     {
         mask |= TVIF_TEXT;
-        tvIns.item.pszText = (wxChar *)text.c_str();  // cast is ok
+        tvIns.item.pszText = (wxChar *)text.wx_str();  // cast is ok
     }
     else
     {
@@ -1488,12 +1531,27 @@ wxTreeItemId wxTreeCtrl::DoInsertAfter(const wxTreeItemId& parent,
     tvIns.item.lParam = (LPARAM)param;
     tvIns.item.mask = mask;
 
+    // don't use the hack below for the children of hidden root: this results
+    // in a crash inside comctl32.dll when we call TreeView_GetItemRect()
+    const bool firstChild = !IsHiddenRoot(parent) &&
+                                !TreeView_GetChild(GetHwnd(), HITEM(parent));
+
     HTREEITEM id = TreeView_InsertItem(GetHwnd(), &tvIns);
     if ( id == 0 )
     {
         wxLogLastError(wxT("TreeView_InsertItem"));
     }
 
+    // apparently some Windows versions (2000 and XP are reported to do this)
+    // sometimes don't refresh the tree after adding the first child and so we
+    // need this to make the "[+]" appear
+    if ( firstChild )
+    {
+        RECT rect;
+        TreeView_GetItemRect(GetHwnd(), HITEM(parent), &rect, FALSE);
+        ::InvalidateRect(GetHwnd(), &rect, FALSE);
+    }
+
     // associate the application tree item with Win32 tree item handle
     param->SetItem(id);
 
@@ -1507,33 +1565,14 @@ wxTreeItemId wxTreeCtrl::DoInsertAfter(const wxTreeItemId& parent,
     return wxTreeItemId(id);
 }
 
-// for compatibility only
-#if WXWIN_COMPATIBILITY_2_4
-
-void wxTreeCtrl::SetImageList(wxImageList *imageList, int)
-{
-    SetImageList(imageList);
-}
-
-int wxTreeCtrl::GetItemSelectedImage(const wxTreeItemId& item) const
-{
-    return GetItemImage(item, wxTreeItemIcon_Selected);
-}
-
-void wxTreeCtrl::SetItemSelectedImage(const wxTreeItemId& item, int image)
-{
-    SetItemImage(item, image, wxTreeItemIcon_Selected);
-}
-
-#endif // WXWIN_COMPATIBILITY_2_4
-
 wxTreeItemId wxTreeCtrl::AddRoot(const wxString& text,
                                  int image, int selectedImage,
                                  wxTreeItemData *data)
 {
-
     if ( HasFlag(wxTR_HIDE_ROOT) )
     {
+        wxASSERT_MSG( !m_pVirtualRoot, _T("tree can have only a single root") );
+
         // create a virtual root item, the parent for all the others
         wxTreeItemParam *param = new wxTreeItemParam;
         param->SetData(data);
@@ -1581,6 +1620,10 @@ wxTreeItemId wxTreeCtrl::DoInsertItem(const wxTreeItemId& parent,
 
 void wxTreeCtrl::Delete(const wxTreeItemId& item)
 {
+    // unlock tree selections on vista, without this the
+    // tree ctrl will eventually crash after item deletion
+    TreeItemUnlocker unlock_all;
+
     if ( !TreeView_DeleteItem(GetHwnd(), HITEM(item)) )
     {
         wxLogLastError(wxT("TreeView_DeleteItem"));
@@ -1590,6 +1633,9 @@ void wxTreeCtrl::Delete(const wxTreeItemId& item)
 // delete all children (but don't delete the item itself)
 void wxTreeCtrl::DeleteChildren(const wxTreeItemId& item)
 {
+    // unlock tree selections on vista for the duration of this call
+    TreeItemUnlocker unlock_all;
+
     wxTreeItemIdValue cookie;
 
     wxArrayTreeItemIds children;
@@ -1613,6 +1659,9 @@ void wxTreeCtrl::DeleteChildren(const wxTreeItemId& item)
 
 void wxTreeCtrl::DeleteAllItems()
 {
+    // unlock tree selections on vista for the duration of this call
+    TreeItemUnlocker unlock_all;
+
     // delete the "virtual" root item.
     if ( GET_VIRTUAL_ROOT() )
     {
@@ -1660,7 +1709,7 @@ void wxTreeCtrl::DoExpand(const wxTreeItemId& item, int flag)
                                                            : IDX_COLLAPSE]
                                          [IDX_DONE],
                            this, item);
-        (void)GetEventHandler()->ProcessEvent(event);
+        (void)HandleWindowEvent(event);
     }
     //else: change didn't took place, so do nothing at all
 }
@@ -1685,15 +1734,6 @@ void wxTreeCtrl::Toggle(const wxTreeItemId& item)
     DoExpand(item, TVE_TOGGLE);
 }
 
-#if WXWIN_COMPATIBILITY_2_4
-
-void wxTreeCtrl::ExpandItem(const wxTreeItemId& item, int action)
-{
-    DoExpand(item, action);
-}
-
-#endif
-
 void wxTreeCtrl::Unselect()
 {
     wxASSERT_MSG( !(m_windowStyle & wxTR_MULTIPLE),
@@ -1725,34 +1765,36 @@ void wxTreeCtrl::UnselectAll()
 
 void wxTreeCtrl::SelectItem(const wxTreeItemId& item, bool select)
 {
-    if ( m_windowStyle & wxTR_MULTIPLE )
-    {
-        ::SelectItem(GetHwnd(), HITEM(item), select);
-    }
-    else
-    {
-        wxASSERT_MSG( select,
-                      _T("SelectItem(false) works only for multiselect") );
+    wxCHECK_RET( !IsHiddenRoot(item), _T("can't select hidden root item") );
 
-        // inspite 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
+    wxASSERT_MSG( select || HasFlag(wxTR_MULTIPLE),
+                  _T("SelectItem(false) works only for multiselect") );
 
-        wxTreeEvent event(wxEVT_COMMAND_TREE_SEL_CHANGING, this, item);
-        if ( !GetEventHandler()->ProcessEvent(event) || event.IsAllowed() )
+    wxTreeEvent event(wxEVT_COMMAND_TREE_SEL_CHANGING, this, item);
+    if ( !HandleWindowEvent(event) || event.IsAllowed() )
+    {
+        if ( HasFlag(wxTR_MULTIPLE) )
         {
-            if ( !TreeView_SelectItem(GetHwnd(), HITEM(item)) )
+            if ( !::SelectItem(GetHwnd(), HITEM(item), select) )
             {
                 wxLogLastError(wxT("TreeView_SelectItem"));
+                return;
             }
-            else // ok
+        }
+        else // single selection
+        {
+            // use TreeView_SelectItem() to deselect the previous selection
+            if ( !TreeView_SelectItem(GetHwnd(), HITEM(item)) )
             {
-                event.SetEventType(wxEVT_COMMAND_TREE_SEL_CHANGED);
-                (void)GetEventHandler()->ProcessEvent(event);
+                wxLogLastError(wxT("TreeView_SelectItem"));
+                return;
             }
         }
-        //else: program vetoed the change
+
+        event.SetEventType(wxEVT_COMMAND_TREE_SEL_CHANGED);
+        (void)HandleWindowEvent(event);
     }
+    //else: program vetoed the change
 }
 
 void wxTreeCtrl::EnsureVisible(const wxTreeItemId& item)
@@ -1950,7 +1992,9 @@ bool wxTreeCtrl::MSWShouldPreProcessMessage(WXMSG* msg)
 {
     if ( msg->message == WM_KEYDOWN )
     {
-        if ( msg->wParam == VK_RETURN )
+        // Only eat VK_RETURN if not being used by the application in
+        // conjunction with modifiers
+        if ( (msg->wParam == VK_RETURN) && !wxIsAnyModifierDown() )
         {
             // we need VK_RETURN to generate wxEVT_COMMAND_TREE_ITEM_ACTIVATED
             return false;
@@ -1960,8 +2004,10 @@ bool wxTreeCtrl::MSWShouldPreProcessMessage(WXMSG* msg)
     return wxTreeCtrlBase::MSWShouldPreProcessMessage(msg);
 }
 
-bool wxTreeCtrl::MSWCommand(WXUINT cmd, WXWORD id)
+bool wxTreeCtrl::MSWCommand(WXUINT cmd, WXWORD id_)
 {
+    const int id = (signed short)id_;
+
     if ( cmd == EN_UPDATE )
     {
         wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, id);
@@ -2039,7 +2085,7 @@ WXLRESULT wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lPara
 
         event.m_pointDrag = pt;
 
-        if ( GetEventHandler()->ProcessEvent(event) )
+        if ( HandleWindowEvent(event) )
             processed = true;
         //else: continue with generating wxEVT_CONTEXT_MENU in base class code
     }
@@ -2069,7 +2115,7 @@ WXLRESULT wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lPara
                         SetFocus();
 
                         // toggle selected state
-                        ::ToggleItemSelection(GetHwnd(), htItem);
+                        ToggleItemSelection(htItem);
 
                         ::SetFocus(GetHwnd(), htItem);
 
@@ -2132,6 +2178,14 @@ WXLRESULT wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lPara
                             ::SetFocus(GetHwnd(), htItem);
                             processed = true;
                         }
+                        else // click on a single selected item
+                        {
+                            // don't interfere with the default processing in
+                            // WM_MOUSEMOVE handler below as the default window
+                            // proc will start the drag itself if we let have
+                            // WM_LBUTTONDOWN
+                            m_htClickedItem.Unset();
+                        }
 
                         // reset on any click without Shift
                         m_htSelStart.Unset();
@@ -2139,6 +2193,38 @@ WXLRESULT wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lPara
                 }
                 break;
 
+            case WM_RBUTTONDOWN:
+                // default handler removes the highlight from the currently
+                // focused item when right mouse button is pressed on another
+                // one but keeps the remaining items highlighted, which is
+                // confusing, so override this default behaviour for tree with
+                // multiple selections
+                if ( isMultiple )
+                {
+                    if ( !IsItemSelected(GetHwnd(), htItem) )
+                    {
+                        UnselectAll();
+                        SelectItem(htItem);
+                        ::SetFocus(GetHwnd(), htItem);
+                    }
+
+                    // fire EVT_RIGHT_DOWN
+                    HandleMouseEvent(nMsg, x, y, wParam);
+
+                    // send NM_RCLICK
+                    NMHDR nmhdr;
+                    nmhdr.hwndFrom = GetHwnd();
+                    nmhdr.idFrom = ::GetWindowLong(GetHwnd(), GWL_ID);
+                    nmhdr.code = NM_RCLICK;
+                    ::SendMessage(::GetParent(GetHwnd()), WM_NOTIFY,
+                                  nmhdr.idFrom, (LPARAM)&nmhdr);
+
+                    // prevent tree control default processing, as we've
+                    // already done everything
+                    processed = true;
+                }
+                break;
+
             case WM_MOUSEMOVE:
 #ifndef __WXWINCE__
                 if ( m_htClickedItem )
@@ -2146,39 +2232,49 @@ WXLRESULT wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lPara
                     int cx = abs(m_ptClick.x - x);
                     int cy = abs(m_ptClick.y - y);
 
-                    if ( cx > GetSystemMetrics( SM_CXDRAG ) || cy > GetSystemMetrics( SM_CYDRAG ) )
+                    if ( cx > ::GetSystemMetrics(SM_CXDRAG) ||
+                            cy > ::GetSystemMetrics(SM_CYDRAG) )
                     {
-                        HWND pWnd = ::GetParent( GetHwnd() );
-                        if ( pWnd )
-                        {
-                            NM_TREEVIEW tv;
+                        NM_TREEVIEW tv;
+                        wxZeroMemory(tv);
 
-                            tv.hdr.hwndFrom = GetHwnd();
-                            tv.hdr.idFrom = ::GetWindowLong( GetHwnd(), GWL_ID );
-                            tv.hdr.code = TVN_BEGINDRAG;
+                        tv.hdr.hwndFrom = GetHwnd();
+                        tv.hdr.idFrom = ::GetWindowLong(GetHwnd(), GWL_ID);
+                        tv.hdr.code = TVN_BEGINDRAG;
 
-                            tv.itemNew.hItem = HITEM(m_htClickedItem);
+                        tv.itemNew.hItem = HITEM(m_htClickedItem);
 
-                            TVITEM tviAux;
-                            ZeroMemory(&tviAux, sizeof(tviAux));
-                            tviAux.hItem = HITEM(m_htClickedItem);
-                            tviAux.mask = TVIF_STATE | TVIF_PARAM;
-                            tviAux.stateMask = 0xffffffff;
-                            TreeView_GetItem( GetHwnd(), &tviAux );
 
-                            tv.itemNew.state = tviAux.state;
-                            tv.itemNew.lParam = tviAux.lParam;
+                        TVITEM tviAux;
+                        wxZeroMemory(tviAux);
 
-                            tv.ptDrag.x = x;
-                            tv.ptDrag.y = y;
+                        tviAux.hItem = HITEM(m_htClickedItem);
+                        tviAux.mask = TVIF_STATE | TVIF_PARAM;
+                        tviAux.stateMask = 0xffffffff;
+                        TreeView_GetItem(GetHwnd(), &tviAux);
 
-                            ::SendMessage( pWnd, WM_NOTIFY, tv.hdr.idFrom, (LPARAM)&tv );
-                        }
+                        tv.itemNew.state = tviAux.state;
+                        tv.itemNew.lParam = tviAux.lParam;
+
+                        tv.ptDrag.x = x;
+                        tv.ptDrag.y = y;
+
+                        // do it before SendMessage() call below to avoid
+                        // reentrancies here if there is another WM_MOUSEMOVE
+                        // in the queue already
                         m_htClickedItem.Unset();
+
+                        ::SendMessage(GetHwndOf(GetParent()), WM_NOTIFY,
+                                      tv.hdr.idFrom, (LPARAM)&tv );
+
+                        // don't pass it to the default window proc, it would
+                        // start dragging again
+                        processed = true;
                     }
                 }
 #endif // __WXWINCE__
 
+#if wxUSE_DRAGIMAGE
                 if ( m_dragImage )
                 {
                     m_dragImage->Move(wxPoint(x, y));
@@ -2191,6 +2287,7 @@ WXLRESULT wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lPara
                         m_dragImage->Show();
                     }
                 }
+#endif // wxUSE_DRAGIMAGE
                 break;
 
             case WM_LBUTTONUP:
@@ -2216,6 +2313,7 @@ WXLRESULT wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lPara
                 // fall through
 
             case WM_RBUTTONUP:
+#if wxUSE_DRAGIMAGE
                 if ( m_dragImage )
                 {
                     m_dragImage->EndDrag();
@@ -2224,12 +2322,15 @@ WXLRESULT wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lPara
 
                     // generate the drag end event
                     wxTreeEvent event(wxEVT_COMMAND_TREE_END_DRAG, this, htItem);
-                    (void)GetEventHandler()->ProcessEvent(event);
+                    event.m_pointDrag = wxPoint(x, y);
+
+                    (void)HandleWindowEvent(event);
 
                     // if we don't do it, the tree seems to think that 2 items
                     // are selected simultaneously which is quite weird
                     TreeView_SelectDropTarget(GetHwnd(), 0);
                 }
+#endif // wxUSE_DRAGIMAGE
                 break;
         }
     }
@@ -2263,7 +2364,7 @@ WXLRESULT wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lPara
             case VK_SPACE:
                 if ( bCtrl )
                 {
-                    ::ToggleItemSelection(GetHwnd(), htSel);
+                    ToggleItemSelection(htSel);
                 }
                 else
                 {
@@ -2370,6 +2471,24 @@ wxTreeCtrl::MSWDefWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
         if ( wParam == VK_SPACE || wParam == VK_RETURN )
             return 0;
     }
+#if wxUSE_DRAGIMAGE
+    else if ( nMsg == WM_KEYDOWN )
+    {
+        if ( wParam == VK_ESCAPE )
+        {
+            if ( m_dragImage )
+            {
+                m_dragImage->EndDrag();
+                delete m_dragImage;
+                m_dragImage = NULL;
+
+                // if we don't do it, the tree seems to think that 2 items
+                // are selected simultaneously which is quite weird
+                TreeView_SelectDropTarget(GetHwnd(), 0);
+            }
+        }
+    }
+#endif // wxUSE_DRAGIMAGE
 
     return wxControl::MSWDefWindowProc(nMsg, wParam, lParam);
 }
@@ -2530,8 +2649,7 @@ 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
-                const bool isAltDown = ::GetKeyState(VK_MENU) < 0;
-                WXLPARAM lParam = (isAltDown ? KF_ALTDOWN : 0) << 16;
+                WXLPARAM lParam = (wxIsAltDown() ? KF_ALTDOWN : 0) << 16;
 
                 WXWPARAM wParam = info->wVKey;
 
@@ -2549,7 +2667,7 @@ bool wxTreeCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
                                                 wParam);
 
                 // a separate event for Space/Return
-                if ( !wxIsCtrlDown() && !wxIsShiftDown() && !isAltDown &&
+                if ( !wxIsAnyModifierDown() &&
                      ((info->wVKey == VK_SPACE) || (info->wVKey == VK_RETURN)) )
                 {
                    wxTreeItemId item;
@@ -2558,11 +2676,42 @@ bool wxTreeCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
 
                    wxTreeEvent event2(wxEVT_COMMAND_TREE_ITEM_ACTIVATED,
                                         this, item);
-                   (void)GetEventHandler()->ProcessEvent(event2);
+                   (void)HandleWindowEvent(event2);
                 }
             }
             break;
 
+
+        // Vista's tree control has introduced some problems with our
+        // multi-selection tree.  When TreeView_SelectItem() is called,
+        // the wrong items are deselected.
+
+        // Fortunately, Vista provides a new notification, TVN_ITEMCHANGING
+        // that can be used to regulate this incorrect behavior.  The
+        // following messages will allow only the unlocked item's selection
+        // state to change
+
+        case TVN_ITEMCHANGINGA:
+        case TVN_ITEMCHANGINGW:
+            {
+                // we only need to handles these in multi-select trees
+                if ( HasFlag(wxTR_MULTIPLE) )
+                {
+                    // get info about the item about to be changed
+                    NMTVITEMCHANGE* info = (NMTVITEMCHANGE*)lParam;
+                    if (TreeItemUnlocker::IsLocked(info->hItem))
+                    {
+                        // item's state is locked, don't allow the change
+                        // returning 1 will disallow the change
+                        *result = 1;
+                        return true;
+                    }
+                }
+
+                // allow the state change
+            }
+            return false;
+
         // NB: MSLU is broken and sends TVN_SELCHANGEDA instead of
         //     TVN_SELCHANGEDW in Unicode mode under Win98. Therefore
         //     we have to handle both messages:
@@ -2592,6 +2741,19 @@ bool wxTreeCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
                     event.m_itemOld = tv->itemOld.hItem;
                 }
             }
+
+            // we receive this message from WM_LBUTTONDOWN handler inside
+            // comctl32.dll and so before the click is passed to
+            // DefWindowProc() which sets the focus to the window which was
+            // clicked and this can lead to unexpected event sequences: for
+            // example, we may get a "selection change" event from the tree
+            // before getting a "kill focus" event for the text control which
+            // had the focus previously, thus breaking user code doing input
+            // validation
+            //
+            // to avoid such surprises, we force the generation of focus events
+            // now, before we generate the selection change ones
+            SetFocus();
             break;
 
             // instead of explicitly checking for _WIN32_IE, check if the
@@ -2732,7 +2894,7 @@ bool wxTreeCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
     if ( event.m_item.IsOk() )
         event.SetClientObject(GetItemData(event.m_item));
 
-    bool processed = GetEventHandler()->ProcessEvent(event);
+    bool processed = HandleWindowEvent(event);
 
     // post processing
     switch ( hdr->code )
@@ -2758,6 +2920,7 @@ bool wxTreeCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
 
         case TVN_BEGINDRAG:
         case TVN_BEGINRDRAG:
+#if wxUSE_DRAGIMAGE
             if ( event.IsAllowed() )
             {
                 // normally this is impossible because the m_dragImage is
@@ -2768,6 +2931,7 @@ bool wxTreeCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
                 m_dragImage->BeginDrag(wxPoint(0,0), this);
                 m_dragImage->Show();
             }
+#endif // wxUSE_DRAGIMAGE
             break;
 
         case TVN_DELETEITEM:
@@ -2856,17 +3020,40 @@ bool wxTreeCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
             break;
 
         case TVN_ITEMEXPANDED:
-            // the item is not refreshed properly after expansion when it has
-            // an image depending on the expanded/collapsed state - bug in
-            // comctl32.dll or our code?
             {
                 NM_TREEVIEW *tv = (NM_TREEVIEW *)lParam;
-                wxTreeItemId id(tv->itemNew.hItem);
+                const wxTreeItemId id(tv->itemNew.hItem);
 
-                int image = GetItemImage(id, wxTreeItemIcon_Expanded);
-                if ( image != -1 )
+                if ( tv->action == TVE_COLLAPSE )
+                {
+                    if ( wxApp::GetComCtl32Version() >= 600 )
+                    {
+                        // for some reason the item selection rectangle depends
+                        // on whether it is expanded or collapsed (at least
+                        // with comctl32.dll v6): it is wider (by 3 pixels) in
+                        // the expanded state, so when the item collapses and
+                        // then is deselected the rightmost 3 pixels of the
+                        // previously drawn selection are left on the screen
+                        //
+                        // it's not clear if it's a bug in comctl32.dll or in
+                        // our code (because it does not happen in Explorer but
+                        // OTOH we don't do anything which could result in this
+                        // AFAICS) but we do need to work around it to avoid
+                        // ugly artifacts
+                        RefreshItem(id);
+                    }
+                }
+                else // expand
                 {
-                    RefreshItem(id);
+                    // the item is also not refreshed properly after expansion when
+                    // it has an image depending on the expanded/collapsed state:
+                    // again, it's not clear if the bug is in comctl32.dll or our
+                    // code...
+                    int image = GetItemImage(id, wxTreeItemIcon_Expanded);
+                    if ( image != -1 )
+                    {
+                        RefreshItem(id);
+                    }
                 }
             }
             break;