/// <summary>
/// Calls this method on each frame.
/// </summary>
/// <returns><c>true</c> if if the control is still active, <c>false</c> otherwise.</returns>
/// <exception cref="System.InvalidOperationException">An error occured </exception>
public bool NextFrame()
{
// Setup new control
// TODO this is not completely thread-safe. We should use a lock to handle this correctly
if (switchControl && control != null)
{
controlHandle = control.Handle;
control.Disposed += ControlDisposed;
isControlAlive = true;
switchControl = false;
}
if (isControlAlive)
{
if (UseApplicationDoEvents)
{
// Revert back to Application.DoEvents in order to support Application.AddMessageFilter
// Seems that DoEvents is compatible with Mono unlike Application.Run that was not running
// correctly.
Application.DoEvents();
}
else
{
var localHandle = controlHandle;
if (localHandle != IntPtr.Zero)
{
// Previous code not compatible with Application.AddMessageFilter but faster then DoEvents
Win32Native.NativeMessage msg;
while (Win32Native.PeekMessage(out msg, IntPtr.Zero, 0, 0, 0) != 0)
{
if (Win32Native.GetMessage(out msg, IntPtr.Zero, 0, 0) == -1)
{
throw new InvalidOperationException(String.Format(CultureInfo.InvariantCulture,
"An error happened in rendering loop while processing windows messages. Error: {0}",
Marshal.GetLastWin32Error()));
}
// NCDESTROY event?
if (msg.msg == 130)
{
isControlAlive = false;
}
var message = new Message()
{
HWnd = msg.handle, LParam = msg.lParam, Msg = (int)msg.msg, WParam = msg.wParam
};
// Skip special message
//if (gameForm != null && message.HWnd == gameForm.Handle && gameForm.FilterWindowsKeys(ref message))
//{
// continue;
//}
if (!Application.FilterMessage(ref message))
{
Win32Native.TranslateMessage(ref msg);
Win32Native.DispatchMessage(ref msg);
}
}
}
}
}
return(isControlAlive || switchControl);
}
