public SurrogateMdiChildControl(SurrogateMdiChild parent)
{
Contract.Requires(parent != null);
this.Proxy = parent;
this.stpLastPing = Stopwatch.StartNew();
}
public void NotifyClosed(SurrogateMdiChild child)
{
Contract.Requires(child != null);
lock (syncSurrogatedChildren)
{
SurrogatedChildren.Remove(child);
}
}
public ISurrogateMdiChild CreateChild(string title, Rectangle location, bool isResizable, bool isMovable, ISurrogateMdiChildContent childContent)
{
lock (syncSurrogatedChildren)
{
var newChild = new SurrogateMdiChild(this, title, location, isResizable, isMovable, childContent);
SurrogatedChildren.Add(newChild);
return(newChild);
}
}
protected override void WndProc(ref Message m)
{
if (Proxy == null)
{
// we're already destroyed, no-op
}
else if (m.Msg == WM_SYSCHAR)
{
// for some reason, we get a deadlock when Ctrl+Spacebar is pressed with a
// foreign window focused. That happens on processing of WM_SYSCHAR
return;
}
else if (m.Msg == WM_SYSCOMMAND)
{
if (SC_FROM_WPARAM(m.WParam) == SC_MOVE && !Proxy.IsMovable)
{
// WM_SYSCOMMAND SC_MOVE == start move operation. Which we cancel by not calling DefWndProc.
return;
}
}
else if (m.Msg == WM_CLOSE)
{
try
{
this.Proxy.ChildContent.Close();
}
catch (OperationCanceledException)
{
return;
}
catch (Exception ex)
{
Debug.WriteLine("Exception while calling cross process MDI Close handler");
Debug.WriteLine(ex);
// no-op, allow the close
}
}
else if (m.Msg == WM_DESTROY)
{
this.Proxy.OnDestroy();
this.Proxy = null;
}
else if (m.Msg == WM_EXITSIZEMOVE)
{
try
{
this.Proxy.ChildContent.SizeChanged(ClientSize);
}
catch (Exception ex)
{
Debug.WriteLine("Exception while calling cross process MDI size changed handler");
Debug.WriteLine(ex);
}
}
else if (m.Msg == WM_ERASEBKGND && stpLastPing.Elapsed > TimeSpan.FromMilliseconds(100))
{
try
{
this.Proxy.ChildContent.Ping();
}
// Something in Framework is using SendMessage, which does not play nicely with COM
catch (COMException cex) when(cex.HResult == Esatto.Win32.Com.NativeMethods.RPC_E_CANTCALLOUT_ININPUTSYNCCALL)
{
// no-op, we will ping next time around.
}
catch (Exception ex)
{
Debug.WriteLine("Ping failed, closing form");
Debug.WriteLine(ex);
this.Visible = false;
}
stpLastPing.Restart();
}
base.WndProc(ref m);
}
