/// <summary>
/// Intercept and fire touch events
/// </summary>
/// <param name="hWnd">The Windows Handle</param>
/// <param name="msg">Windows Message</param>
/// <param name="wparam">wParam</param>
/// <param name="lparam">lParam</param>
/// <returns></returns>
protected IntPtr WindowProc(IntPtr hWnd, int msg, IntPtr wparam, IntPtr lparam, ref bool handled)
{
if (msg == User32.WM_TOUCH)
{
foreach (InteropTouchEventArgs arg in Win32Touch.DecodeMessage(this.HwndWrapper, msg, wparam, lparam, DpiX, DpiY))
{
if (TouchDown != null && arg.IsTouchDown)
{
TouchDown(this, arg);
}
if (TouchMove != null && arg.IsTouchMove)
{
TouchMove(this, arg);
}
if (TouchUp != null && arg.IsTouchUp)
{
TouchUp(this, arg);
}
}
handled = true;
}
if (msg >= User32.WM_MOUSEFIRST &&
msg <= User32.WM_MOUSELAST &&
User32.IsPenOrTouchMessage())
{
//Handle mouse events promoted from touch so promoted duplicate WPF mouse events don't occur
handled = true;
}
return(IntPtr.Zero);
}
public TouchHandler(Window window)
{
Win32Touch.DisableWPFTabletSupport();
GetHandle(window);
HwndWrapper = new WPFWindowWrapper(window);
}