private void HandleBoundingRectChange(IntPtr hwnd)
{
NativeMethods.HWND nativeHwnd = NativeMethods.HWND.Cast(hwnd);
NativeMethods.RECT rc32 = new NativeMethods.RECT(0, 0, 0, 0);
// if GetWindwRect fails, most likely the nativeHwnd is an invalid window, so just return.
if (!Misc.GetWindowRect(nativeHwnd, out rc32))
{
return;
}
// Filter... avoid duplicate events
if (hwnd == _lastHwnd && Compare(rc32, _lastRect))
{
return;
}
AutomationElement rawEl = AutomationElement.FromHandle(hwnd);
// Problem with Avalon combo box & menus:
// There was a windows issue where we get two events. One for the hwnd (LocationChange WinEvent)
// and one for the [usually] DockPanel (Avalon BoundingRectangleProperty change). Both have the
// same Rect value. It's unclear is this issue is still occuring and what (if anything) needs to be done.
// Waiting for WPP redesign to investigate further how to filter out the duplicate which
// happens to be the first (hwnd-based) event.
//
AutomationPropertyChangedEventArgs e = new AutomationPropertyChangedEventArgs(
AutomationElement.BoundingRectangleProperty,
Rect.Empty,
new Rect(rc32.left, rc32.top, rc32.right - rc32.left, rc32.bottom - rc32.top));
// In the case of HWND hosted Avalon content, we will get a LocationChange WinEvent for the host
// window when it's bounding rect changes (e.g. an Avalon window is resized) and we won't (that I've seen)
// get a BoundingRect property change from the Avalon content. Therefore, we need to map the WinEvent.
// In this case, rawEl is already the remote object. It's ol to call this locally since this is called
// to handle a WinEvent (e.g. always called on client-side). Since rawEl may be local (proxied) or
// remote (native) impl then use that version of RaiseEventInThisClientOnly
ClientEventManager.RaiseEventInThisClientOnly(AutomationElement.AutomationPropertyChangedEvent, rawEl, e);
// save the last hwnd/rect for filtering out duplicates
_lastHwnd = hwnd;
_lastRect = rc32;
}
private void HandleBoundingRectChange(IntPtr hwnd)
{
NativeMethods.HWND nativeHwnd = NativeMethods.HWND.Cast(hwnd);
NativeMethods.RECT rc32 = new NativeMethods.RECT(0, 0, 0, 0);
// if GetWindwRect fails, most likely the nativeHwnd is an invalid window, so just return.
if (!Misc.GetWindowRect(nativeHwnd, out rc32))
{
return;
}
// Filter... avoid duplicate events
if (hwnd == _lastHwnd && Compare(rc32, _lastRect))
{
return;
}
AutomationElement rawEl = AutomationElement.FromHandle(hwnd);
//
//
AutomationPropertyChangedEventArgs e = new AutomationPropertyChangedEventArgs(
AutomationElement.BoundingRectangleProperty,
Rect.Empty,
new Rect(rc32.left, rc32.top, rc32.right - rc32.left, rc32.bottom - rc32.top));
//
ClientEventManager.RaiseEventInThisClientOnly(AutomationElement.AutomationPropertyChangedEvent, rawEl, e);
// save the last hwnd/rect for filtering out duplicates
_lastHwnd = hwnd;
_lastRect = rc32;
}
