Backported [ 622089 ] wxTR_EDIT_LABELS vs wxTR_MULTIPLE style

Fix for wxTreeCtrl label editing in wxTR_MULTIPLE mode


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_4_BRANCH@20011 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/changes.txt

@@ -204,6 +204,7 @@ wxMSW:
 - fix for explicit keyword detection (VC++)
 - fix for sending event from wxCheckListBox::Check()
 - wxCaret::SetSize correction for showing caret
+- fix for wxTreeCtrl label editing in wxTR_MULTIPLE mode
 
 wxMotif:
 

src/msw/treectrl.cpp

@@ -2091,13 +2091,23 @@ long wxTreeCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
                     }
                     else // normal click
                     {
-                        // clear the selection and then let the default handler
+                        // avoid doing anything if we click on the only
-                        // do the job
+                        // currently selected item
+                        wxArrayTreeItemIds selections;
+                        size_t count = GetSelections(selections);
+                        if ( count == 0 ||
+                                count > 1 ||
+                                    HITEM(selections[0]) != htItem )
+                        {
+                            // clear the previously selected items
                         UnselectAll();
 
                         // prevent the click from starting in-place editing
-                        // when there was no selection in the control
+                            // which should only happen if we click on the
+                            // already selected item (and nothing else is
+                            // selected)
                         TreeView_SelectItem(GetHwnd(), 0);
+                        }
 
                         // reset on any click without Shift
                         m_htSelStart = 0;