bool wxGUIEventLoop::PreProcessMessage(WXMSG *msg)
{
HWND hwnd = msg->hwnd;
wxWindow *wndThis = wxGetWindowFromHWND((WXHWND)hwnd);
wxWindow *wnd;
// this might happen if we're in a modeless dialog, or if a wx control has
// children which themselves were not created by wx (i.e. wxActiveX control children)
if ( !wndThis )
{
while ( hwnd && (::GetWindowLong(hwnd, GWL_STYLE) & WS_CHILD ))
{
hwnd = ::GetParent(hwnd);
// If the control has a wx parent, break and give the parent a chance
// to process the window message
wndThis = wxGetWindowFromHWND((WXHWND)hwnd);
if (wndThis != NULL)
break;
}
if ( !wndThis )
{
// this may happen if the event occurred in a standard modeless dialog (the
// only example of which I know of is the find/replace dialog) - then call
// IsDialogMessage() to make TAB navigation in it work
// NOTE: IsDialogMessage() just eats all the messages (i.e. returns true for
// them) if we call it for the control itself
return hwnd && ::IsDialogMessage(hwnd, msg) != 0;
}
}
if ( !AllowProcessing(wndThis) )
{
// not a child of critical window, so we eat the event but take care to
// stop an endless stream of WM_PAINTs which would have resulted if we
// didn't validate the invalidated part of the window
if ( msg->message == WM_PAINT )
::ValidateRect(hwnd, NULL);
return true;
}
#if wxUSE_TOOLTIPS
// we must relay WM_MOUSEMOVE events to the tooltip ctrl if we want it to
// popup the tooltip bubbles
if ( msg->message == WM_MOUSEMOVE )
{
// we should do it if one of window children has an associated tooltip
// (and not just if the window has a tooltip itself)
if ( wndThis->HasToolTips() )
wxToolTip::RelayEvent((WXMSG *)msg);
}
#endif // wxUSE_TOOLTIPS
// allow the window to prevent certain messages from being
// translated/processed (this is currently used by wxTextCtrl to always
// grab Ctrl-C/V/X, even if they are also accelerators in some parent)
if ( !wndThis->MSWShouldPreProcessMessage((WXMSG *)msg) )
{
return false;
}
// try translations first: the accelerators override everything
for ( wnd = wndThis; wnd; wnd = wnd->GetParent() )
{
if ( wnd->MSWTranslateMessage((WXMSG *)msg))
return true;
// stop at first top level window, i.e. don't try to process the key
// strokes originating in a dialog using the accelerators of the parent
// frame - this doesn't make much sense
if ( wnd->IsTopLevel() )
break;
}
// now try the other hooks (kbd navigation is handled here)
for ( wnd = wndThis; wnd; wnd = wnd->GetParent() )
{
if ( wnd->MSWProcessMessage((WXMSG *)msg) )
return true;
// also stop at first top level window here, just as above because
// if we don't do this, pressing ESC on a modal dialog shown as child
// of a modal dialog with wxID_CANCEL will cause the parent dialog to
// be closed, for example
if ( wnd->IsTopLevel() )
break;
}
// no special preprocessing for this message, dispatch it normally
return false;
}
bool wxEventLoop::PreProcessMessage(WXMSG *msg)
{
HWND hwnd = msg->hwnd;
wxWindow * const wndThis = wxGetWindowFromHWND((WXHWND)hwnd);
wxWindow *wnd;
// this may happen if the event occurred in a standard modeless dialog (the
// only example of which I know of is the find/replace dialog) - then call
// IsDialogMessage() to make TAB navigation in it work
if ( !wndThis )
{
// we need to find the dialog containing this control as
// IsDialogMessage() just eats all the messages (i.e. returns true for
// them) if we call it for the control itself
while ( hwnd && ::GetWindowLong(hwnd, GWL_STYLE) & WS_CHILD )
{
hwnd = ::GetParent(hwnd);
}
return hwnd && ::IsDialogMessage(hwnd, msg) != 0;
}
if ( !AllowProcessing(wndThis) )
{
// not a child of critical window, so we eat the event but take care to
// stop an endless stream of WM_PAINTs which would have resulted if we
// didn't validate the invalidated part of the window
if ( msg->message == WM_PAINT )
::ValidateRect(hwnd, NULL);
return true;
}
#if wxUSE_TOOLTIPS
// we must relay WM_MOUSEMOVE events to the tooltip ctrl if we want it to
// popup the tooltip bubbles
if ( msg->message == WM_MOUSEMOVE )
{
wxToolTip *tt = wndThis->GetToolTip();
if ( tt )
{
tt->RelayEvent((WXMSG *)msg);
}
}
#endif // wxUSE_TOOLTIPS
// allow the window to prevent certain messages from being
// translated/processed (this is currently used by wxTextCtrl to always
// grab Ctrl-C/V/X, even if they are also accelerators in some parent)
if ( !wndThis->MSWShouldPreProcessMessage((WXMSG *)msg) )
{
return false;
}
// try translations first: the accelerators override everything
for ( wnd = wndThis; wnd; wnd = wnd->GetParent() )
{
if ( wnd->MSWTranslateMessage((WXMSG *)msg))
return true;
// stop at first top level window, i.e. don't try to process the key
// strokes originating in a dialog using the accelerators of the parent
// frame - this doesn't make much sense
if ( wnd->IsTopLevel() )
break;
}
// now try the other hooks (kbd navigation is handled here)
for ( wnd = wndThis; wnd; wnd = wnd->GetParent() )
{
if (wnd != wndThis) // Skip the first since wndThis->MSWProcessMessage() was called above
{
if ( wnd->MSWProcessMessage((WXMSG *)msg) )
return true;
}
// Stop at first top level window (as per comment above).
// If we don't do this, pressing ESC on a modal dialog shown as child of a modal
// dialog with wxID_CANCEL will cause the parent dialog to be closed, for example
if (wnd->IsTopLevel())
break;
}
// no special preprocessing for this message, dispatch it normally
return false;
}