* Fixed some memory leaks in TfpgComboBox.

* Fixed the destruction order of TfpgComboBox.
* Introduced DoRemoveWindowLookup() in gfxbase.pas so that we
  can offload some of the responsibility from DoReleaseWindowHandle()
* Add two new debug methods to help debug fpGUI and fpGUI based
  applications. They are PrintCallTrace() and PrintCallTraceDbgln().
* Fixed 'Index out of bounds' error when quiting your application.
* I included lots of debug output in this revision, so I can test
  under Windows. As soon as I confirmed everything works, I'll
  remove the debug output again.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/corelib/gfxbase.pas b/src/corelib/gfxbase.pas
index 07b8fe7b..ebd20e99 100644
--- a/src/corelib/gfxbase.pas
+++ b/src/corelib/gfxbase.pas
@@ -326,6 +326,7 @@ type
     procedure   DoUpdateWindowPosition(aleft, atop, awidth, aheight: TfpgCoord); virtual; abstract;
     procedure   DoAllocateWindowHandle(AParent: TfpgWindowBase); virtual; abstract;
     procedure   DoReleaseWindowHandle; virtual; abstract;
+    procedure   DoRemoveWindowLookup; virtual; abstract;
     procedure   DoSetWindowVisible(const AValue: Boolean); virtual; abstract;
     procedure   DoMoveWindow(const x: TfpgCoord; const y: TfpgCoord); virtual; abstract;
     function    DoWindowToScreen(ASource: TfpgWindowBase; const AScreenPos: TPoint): TPoint; virtual; abstract;
@@ -787,6 +788,7 @@ begin
     Canvas.FreeResources;
     DoReleaseWindowHandle;
   end;
+  DoRemoveWindowLookup;
 end;
 
 procedure TfpgWindowBase.SetWindowTitle(const ATitle: string);