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POReceiving WM_MOUSEMOVE from child controls on MFC CDialog
 

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  1. POReceiving WM_MOUSEMOVE from child controls on MFC CDialog
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    <p>I have my dialog derived from CDialog and I want to close it once user moves mouse cursor away from it. To do so, I've added OnMouseLeave handler which calls OnCancel(). As I understand, for WM_MOUSELEAVE events to be sent in time, TrackMouseEvent must be called inside OnMouseMove routine. So the whole code is as following:</p> <pre><code>void CDlgMain::OnMouseLeave() { CDialog::OnMouseLeave(); // Close dialog when cursor is going out of it OnCancel(); } void CDlgMain::OnMouseMove(UINT nFlags, CPoint point) { TRACKMOUSEEVENT tme; tme.cbSize = sizeof(tme); tme.hwndTrack = m_hWnd; tme.dwFlags = TME_LEAVE; tme.dwHoverTime = HOVER_DEFAULT; TrackMouseEvent(&amp;tme); CDialog::OnMouseMove(nFlags, point); } </code></pre> <p>It works fine, but the dialog is closed when user hovers some of its child controls (like buttons he wants to click on :) ). It is because child controls do not send WM_MOUSEMOVE to the parent dialog.</p> <p>The only function I found to "propagate" WM_MOUSEMOVE messages from child controls is SetCapture(). And it does the job, but 1) user cannot click any button after that and 2) mouse icon changes to hourglasses. So this is not an option.</p> <p>Any suggestions?</p> <p><strong>Update</strong> I placed TrackMouseEvent call to the PreTranslateMessage routine which is called correctly on any mouse move events (even hovering the child controls). The strange thing is WM_MOUSELEAVE is still generated when user hovers child control! Seems like TrackMouseEvent knows what control is hovered now. Any ideas how to fix this?</p>
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