Hi,
I have a problem and need some help to find it. I have an MDI app with a TdxTabbedMDIManager on it. There are a few opened MDI child window and TdxTabbedMDIManager.Active is true. If I switch it off, teh MDI tabs dosn't disappears and if I move a child out of the parents client area, the main form's scrollbars dosn't appears. If I start the app with switched off TdxTabbedMDIManager, all works fine, if I move out a child, the scrollbars appears as well. If I switch the TdxTabbedMDIManager on and then off, all goes wrong. When I change it on, the tabs appears, but when I switch it off, the tabs remains and no scroll bar. I have a small mdi sample app, it works fine. Maybe you have an idea, where can I find the problem. What prevents the main form to actualize their client area?
Regards,
Péter
I found something. The problem is coming if TdxTabbedMDIManager.FIsClientWndDestroying is true. In my app after the first run it is true, because if the form has a stored position, in the main form constructor I set the form's Position to poDesigned and this inctructions call form.SetPosition which call form.RecreateWnd which call FTabbedMDIManager.ClientWndDestroyingNotify which set FIsClientWndDestroying to false.
Is it a bug? Maybe somewhere need set it back to false.
Hello Péter,
Would you please provide us with a small sample project demonstrating your scenario? This way we will be sure that we correctly reproduce the problem. Thanks in advance.
Hello Paulo,
I attached a simple sample project (the default delphi mdi app, with a few changes). After first start it works fine. Please create a new document and then switch off the tabbed view: Window\Tabbed view. The tab disappear and if you move the document out of the main window, the scrollbars appears. After second start (and later) coming the problem. Explanation: the app stores the main form size and position into the registry (TcxPropertiesStore component). In the form constructor it checks if it has a stored position. If not, then it start on the primary monitor in the default position (form.DefaultMonitor is dmPrimary, Position is poDefault). If it find a stored position (second run), then it changes DefaultMonitor to dmDesktop and Position to poDesigned. The Position := poDesigned makes the trouble, because the TdxTabbedMDIManager.FIsClientWndDestroying changes to true and this prevent the form repaint (without tabs). Without setting DefaultMonitor and Position in a multimonitor environment the form can appear in an absolutelly wrong position, because the form show calls SetWindowToMonitor if DefaultMonitor is dmPrimary and Position is poDefault and somethimes gives back a wrong result.
[Attachent removed]
After the test please clear the unnecessary registry settings!
Thanks. I have reproduced this behavior with your demo and forwarded this ticket to our developers for research.
Thank you Paulo!
Is this fix in the last update from today (ver. 15.2)?
This fix will be included into the 15.2.3 build.
Thank you for the quick hotfix! Is there a recommended way to recompile the whole VCL subscription packages?
It should be sufficient to run our installer in Recompile mode (see the How to request and apply a VCL hotfix article).