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IDProjectCategoryView StatusLast Update
0004872JEDI VCL00 JVCL Componentspublic2009-08-05 13:50
ReportermazjacAssigned Toobones 
Status resolvedResolutionfixed 
Product Version3.37 
Target VersionFixed in Version3.38 
Summary0004872: Right click in TJvCheckedCombBox causes Stack Overflow.when Popup window open.
DescriptionTo reproduce the problem in the attached JVTest-OriginalCode.exe.

1. Click on the DropDown Button on the CheckedComboBox.
2. Then click with the Right Mouse button in the CheckComboBox edit control.

Program crashes, Stack Overflow error.

If item is (de)selected in drop down box either by Menu item or checkbox then crash does not occur. I could not see in the code why this makes the problem go away.

P.S. Thanks to Glen for find the problem.

Additional InformationTo work around the problem I changed the following. Both the DateEdit and ComboBox then behave the same as in JVTest-FixedCode.exe.

procedure TJvCustomComboEdit.MouseDown(Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
  if (FPopup <> nil) and (Button = mbLeft) then
    if CanFocus then
    if not FFocused then
    if FPopupVisible then
      PopupCloseUp(FPopup, False);
     if (not ReadOnly or AlwaysEnable) and (not DirectInput) then

// Added 23/07/2009
// Fixed Bug if Right Mouse Button is pressed in control
// Could check if FPopup.ClassName is TjvPrivForm as used in CheckedComboBox.
  if (FPopup <> nil) and FPopupVisible and (Button = mbRight) then
      PopupCloseUp(FPopup, False);
// End of Added Code.
    inherited MouseDown(Button, Shift, X, Y);
TagsNo tags attached.


2009-07-23 03:46 (921,688 bytes)


2009-07-23 09:04

administrator   ~0015880

Please, we need the sources, not the exe

2009-07-24 08:07 (4,898 bytes)


2009-07-24 08:10

reporter   ~0015888

I have just upload the source code.

Delphi 2007 Project.
JVCL : 3.37 (3.34 exhibited same problem)

Same source for both projects, one compiled with existing JVCL code, the other with code as noted above.


2009-08-05 13:50

administrator   ~0015933

This is now fixed in SVN, with a slightly different approach

Issue History

Date Modified Username Field Change
2009-07-23 03:46 mazjac New Issue
2009-07-23 03:46 mazjac File Added:
2009-07-23 09:04 obones Note Added: 0015880
2009-07-23 09:04 obones Status new => feedback
2009-07-24 08:07 mazjac File Added:
2009-07-24 08:10 mazjac Note Added: 0015888
2009-08-05 13:50 obones Note Added: 0015933
2009-08-05 13:50 obones Status feedback => resolved
2009-08-05 13:50 obones Fixed in Version => Daily / SVN
2009-08-05 13:50 obones Resolution open => fixed
2009-08-05 13:50 obones Assigned To => obones