public void UnregisterThumbnail()
{
if (_thumbnailHandle != IntPtr.Zero)
{
DwmApi.DwmUnregisterThumbnail(_thumbnailHandle);
}
}
public void RegisterThumbnail(IntPtr baseWindow, ref System.Windows.Controls.Image image, Point location, Size size)
{
if (_thumbnailHandle != IntPtr.Zero)
{
DwmApi.DwmUnregisterThumbnail(_thumbnailHandle);
}
DwmApi.DwmRegisterThumbnail(baseWindow, _windowHandle, out _thumbnailHandle);
if (_thumbnailHandle == IntPtr.Zero)
{
return;
}
var thumbnailProperties = new DwmApi.ThumbnailProperties
{
dwFlags = DwmApi.ThumbnailProperties.DWM_TNP_VISIBLE +
DwmApi.ThumbnailProperties.DWM_TNP_OPACITY +
DwmApi.ThumbnailProperties.DWM_TNP_RECTDESTINATION,
opacity = 255,
fVisible = true,
rcDestination = new WUser32.Rectangle
{
Left = (int)location.X,
Top = (int)location.Y,
Right = (int)size.Width,
Bottom = (int)size.Height
}
};
DwmApi.DwmUpdateThumbnailProperties(_thumbnailHandle, ref thumbnailProperties);
}
/// <summary>
/// Uses DwmApi to render the entire window in Aero glass
/// </summary>
void InitializeGlass()
{
var bb = new DwmApi.DwmBlurbehind
{
dwFlags = (int)DwmApi.DwmBlurBehindDwFlags.DwmBbEnable,
fEnable = true
};
Background = Brushes.Transparent;
ResizeMode = ResizeMode.NoResize;
WindowStyle = WindowStyle.None;
var hwnd = new WindowInteropHelper(this).Handle;
var hwndSource = HwndSource.FromHwnd(hwnd);
if (hwndSource != null)
{
if (hwndSource.CompositionTarget != null)
{
hwndSource.CompositionTarget.BackgroundColor = Colors.Transparent;
}
}
DwmApi.DwmEnableBlurBehindWindow(hwnd, ref bb);
var dwmncrpDisabled = 2;
DwmApi.DwmSetWindowAttribute(hwnd, DwmApi.DwmWindowAttribute.DWMWA_NCRENDERING_POLICY, ref dwmncrpDisabled, sizeof(int));
Topmost = true;
Focus();
}
/// <summary>
/// Glass is enabled in when the souce window is initialized
/// </summary>
/// <param name="e"></param>
protected override void OnSourceInitialized(EventArgs e)
{
base.OnSourceInitialized(e);
var canRenderInGlass = false;
DwmApi.DwmIsCompositionEnabled(ref canRenderInGlass);
if (canRenderInGlass)
{
InitializeGlass();
}
}