Notification when GetClientAreaBounds changes?

Question

I've got a CFrameWndEx window with a number of docked panes, and a child window placed in the GetDockingManager()->GetClientAreaBounds(rc) space.  How can I get notified when a docked pane is resized (affecting the client area bounds)?  I used to have a splitter window in there and it seemed to magically resize itself correctly...

Answer 1

Any time a window is resized it receives the WM_SIZE message, with the new size.

Answer 2

In this case the Frame window is not resized, just the docked pane within it is resized.  I suppose I could add event handler on all the docked panes and have them notify the parent, but it seems unwieldy (and the splitter was able to handle it without that).

Answer 3

Attempt this in each derived class for your dockable panes:

void CFileView::OnSize(UINT nType, int cx, int cy)
{

	CDockablePane::OnSize(nType, cx, cy);

	AdjustLayout();

}


void CFileView::AdjustLayout()
{

	GetParent()->SetWindowPos(NULL, m_wndFV.r.left, m_wndFV.r.top, m_wndFV.r.Width(), m_wndFV.r.Height(), SWP_NOZORDER);

}

If you want to see unwieldy, then check out the MSDN flagship sample app VisualStudioDemo.

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PAC

Answer 4

Ugh - yeah I can do that (or the like), but I've got quite a number of panes and it seems frustrating that the splitter was able to do it without specialized code in the child panes...

Answer 5

Did you take a look at VisualStudioDemo source code for ideas?

Here's the link http://msdn.microsoft.com/en-us/library/bb983983(v=VS.90).aspx .

Answer 6

Looking at it now: it seems they bypass the problem by making everything a pane (or a view). 

Answer 7

More discussion?

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PAC

Answer 8

So I'm stymied once again.  I gave up on getting notified and instead had the pane notify the parent window when the pane is resized. However, when the parent calls GetDockingManager()->GetClientAreaBounds(rc); the results are not always correct - they're just a bit behind (time-wise), usually giving the rectangle for the previous client area rather than the current one.  I've 'solved' this by injecting a timer which delays things by 20 or so milliseconds, which seems to correct it _most_ of the time.  If I make the timer delay bigger it works more reliably, but starts to get noticeable to the user.  Bah.

Answer 9

So I fixed this last problem by changing this:

    CRect rc;
    GetDockingManager()->GetClientAreaBounds(rc);

to this:

    CRect rc;
    GetDockingManager()->RecalcLayout();
    GetDockingManager()->GetClientAreaBounds(rc);

Still chafing at having to change every pane, but at least it looks like I can get it to work smoothly now.

Answer 10

Take a look at CBasePane::ShowPane.  It shows (or hides) a pane and notifies the docking manager.  It has a delay parameter for recalculating the docking layout.

virtual void ShowPane(
    BOOL bShow,
    BOOL bDelay,
    BOOL bActivate
);

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PAC