CXTPTabClientWnd - EnableTearOff issues

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   If you enable tear off in CXTPTabClientWnd object, you can take off tabs from the window and it works, it will spawn a new window once taken outside the window. Then that new window can be placed back onto it's original window, bringing back the taken off tabs. However, if you take off a tab from that new window, if the tab is the only tab appearing on that window, it will initially once again create a new window - but otherwise program will completely break during processing input messages, with assertions implying that the program is still trying to access a window that doesn't exist.
The issue can be easily reproduced by simply adding a m_wndClient.EnableTearOff(); line in RibbonMDISample.

We have created a video that more clearly shows the issue: https://statica.pl/pliki/n5/RibbonMDI_Tearoff.mp4

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jw_statica Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: 23 May 2018 Status: Offline Points: 27	Post Options Post Reply Quote jw_statica Report Post Thanks(0) Quote Reply Topic: CXTPTabClientWnd - EnableTearOff issues Posted: 10 February 2025 at 5:24am
	If you enable tear off in CXTPTabClientWnd object, you can take off tabs from the window and it works, it will spawn a new window once taken outside the window. Then that new window can be placed back onto it's original window, bringing back the taken off tabs. However, if you take off a tab from that new window, if the tab is the only tab appearing on that window, it will initially once again create a new window - but otherwise program will completely break during processing input messages, with assertions implying that the program is still trying to access a window that doesn't exist. The issue can be easily reproduced by simply adding a m_wndClient.EnableTearOff(); line in RibbonMDISample. We have created a video that more clearly shows the issue: https://statica.pl/pliki/n5/RibbonMDI_Tearoff.mp4

agontarenko Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Joined: 25 March 2016 Status: Offline Points: 302	Post Options Post Reply Quote agontarenko Report Post Thanks(0) Quote Reply Posted: 5 hours 52 minutes ago at 10:27am
	Hello, To resolve your provblem you need to change 1. Base class to CXTPMDIFrameWndEx. class CMainFrame : public CXTPMDIFrameWndEx 2. Add virtual functions as below virtual CXTPDockingPaneManager* GetDockingPaneManager(); virtual CXTPTabClientWnd* GetTabClientWnd(); CXTPDockingPaneManager* CMainFrame::GetDockingPaneManager() { return NULL; } CXTPTabClientWnd* CMainFrame::GetTabClientWnd() { return &m_wndClient; } 3. See please MDITabWindow and GUI_VisualStudio samples Regards, Artem Gontarenko