MFC: How does a FrameWnd know when a docked pane is resized?

mfc

Solution

OK this is a bit weird, but I had the exact same question, searched on Google, then saw that I had answered this question over a year ago but completely misunderstood what the question was about :)

Anyway for reference of future Google using people, the answer to this question is to override virtual void CFrameWndEx::EAdjustDockingLayout(HDWP hdwp) and do any resizing of client controls there. To get the client area after the hiding/closing/whatever of panes, use m_dockManager.GetClientAreaBounds(). My AdjustDockingLayout looks like this (m_View is the child window that is supposed to fill the whole client area regardless of the state of any docking panes, adjust as needed):

void CMainFrame::AdjustDockingLayout(HDWP hdwp)
{
    CFrameWndEx::AdjustDockingLayout(hdwp);

    if (m_View.GetSafeHwnd()) {
        CRect rectUsable = m_dockManager.GetClientAreaBounds();
        m_View.MoveWindow(rectUsable);
    }
}

Problem

I have a `CFrameWndEx` with several docked `CDockablePanes` but I can't seem to get notified when the size of the docked pane is changed (so I can resize my other windows accordingly). Tried Spy++ to check for messages, but custom draw seems to be the only one (which doesn't seem appropriate) and also tried overriding RecalcLayout, but that is not called under this circumstance. `OnSize` doesn't work because the size of the frame itself is not changed. Any ideas? (Ps: I'm pretty sure it's possible because I used to have a splitter window as the 'client' area, and it would resize itself magically when the panes were resized)

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