Fixed tree book controller sizing by invalidating size after first

insertion, and also allowing full size calculation.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@39207 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/treebkg.cpp

@@ -105,6 +105,7 @@ wxTreebook::Create(wxWindow *parent,
                     wxTR_HIDE_ROOT |
                     wxTR_SINGLE
                  );
+    GetTreeCtrl()->SetQuickBestSize(false); // do full size calculation
     GetTreeCtrl()->AddRoot(wxEmptyString); // label doesn't matter, it's hidden
 
 #ifdef __WXMSW__
@@ -244,6 +245,8 @@ bool wxTreebook::DoInsertSubPage(size_t pagePos,
 
     wxTreeItemId newId = tree->AppendItem(parentId, text, imageId);
 
+    tree->InvalidateBestSize();
+
     if ( !newId.IsOk() )
     {
         (void)wxBookCtrlBase::DoRemovePage(newPos);