Double click on cell reverts focus to VT when custom combobox editor is showed with DroppedDown:=True;

[gmnevton]

Hi, excluding csCaptureMouse from ControlStyle solves the problem.

procedure TBaseVirtualTree.WMLButtonDblClk(var Message: TWMLButtonDblClk);

var
  HitInfo: THitInfo;
  wasCaptureMouse: Boolean;

begin
  DoStateChange([tsLeftDblClick]);
  try
    // get information about the hit, before calling inherited, is this may change the scroll postion and so the node under the mouse would chnage and would no longer be the one the user actually clicked
      GetHitTestInfoAt(Message.XPos, Message.YPos, True, HitInfo);
      HandleMouseDblClick(Message, HitInfo);
    // Call inherited after doing our standard handling, as the event handler may close the form or re-fill the control, so our clicked node would be no longer valid.
    // Our standard handling does not do that.
    wasCaptureMouse:=(csCaptureMouse in ControlStyle);
    ControlStyle:=ControlStyle - [csCaptureMouse];
    inherited;
    if wasCaptureMouse then
      ControlStyle:=ControlStyle + [csCaptureMouse];
    // #909
    // if we show a modal form in the HandleMouseDblClick(), the mouse capture wont be released
      if csCaptureMouse in ControlStyle then MouseCapture := False;
  finally
    DoStateChange([], [tsLeftDblClick]);
  end;
end;

[joachimmarder]

Please respect our guidelines on the project homepage for submitting bugs. Please include your version of Virtual TreeView and Delphi, and attach a sample compiling project as ZIP to your report, or instructions how to modify one of the included sample projects to reproduce the problem.

Actually the fix looks a bit hacky to me and I would like to further understand the problem and the proposed solution.