在WindowsFormsHost上呈現WPF控件

Question

我知道默認的WPF行爲是呈現WPF控件，然後在頂部呈現WinForms，但是有沒有什麼方法可以在WindowsFormsHost之上呈現WPF？

編輯：我也發現了一個臨時攻擊。當WPF控件重疊WindowsFormsHost，我改變WindowsFormsHost的大小（這僅適用於當你有矩形物體重疊，對於其他形狀不起作用。）

Answer 1

這個「領空」問題是WPF vNext suppose to be fixed。這裏有幾個解決方案，例如here,here和here。

做到這一點的一種方法是將WPF內容託管在覆蓋Interop內容的透明彈出窗口或窗口中。

Answer 2

下面就以最好的答案，我已經看到了這個問題至今鏈接： Can I overlay a WPF window on top of another?

Answer 3

試試這個關於大小：

<hacks:AirspaceOverlay> 
    <hacks:AirspaceOverlay.OverlayChild> 
     <Canvas ToolTip = "A tooltip over a DirectX surface" Background="#01000000" Name="Overlay" /> 
    </hacks:AirspaceOverlay.OverlayChild> 
    <controls:OpenGLControlWrappingWindowsFormsHost /> 
</hacks:AirspaceOverlay> 


// Adapted from http://blogs.msdn.com/b/pantal/archive/2007/07/31/managed-directx-interop-with-wpf-part-2.aspx & http://www.4mghc.com/topics/69774/1/in-wpf-how-can-you-draw-a-line-over-a-windowsformshost 
public class AirspaceOverlay : Decorator 
{ 
    private readonly Window _transparentInputWindow; 
    private Window _parentWindow; 

    public AirspaceOverlay() 
    { 
     _transparentInputWindow = CreateTransparentWindow(); 
     _transparentInputWindow.PreviewMouseDown += TransparentInputWindow_PreviewMouseDown; 
    } 

    public object OverlayChild 
    { 
     get { return _transparentInputWindow.Content; } 
     set { _transparentInputWindow.Content = value; } 
    } 

    private static Window CreateTransparentWindow() 
    { 
     var transparentInputWindow = new Window(); 

     //Make the window itself transparent, with no style. 
     transparentInputWindow.Background = Brushes.Transparent; 
     transparentInputWindow.AllowsTransparency = true; 
     transparentInputWindow.WindowStyle = WindowStyle.None; 

     //Hide from taskbar until it becomes a child 
     transparentInputWindow.ShowInTaskbar = false; 

     //HACK: This window and it's child controls should never have focus, as window styling of an invisible window 
     //will confuse user. 
     transparentInputWindow.Focusable = false; 

     return transparentInputWindow; 
    } 

    void TransparentInputWindow_PreviewMouseDown(object sender, MouseButtonEventArgs e) 
    { 
     _parentWindow.Focus(); 
    } 

    protected override void OnRenderSizeChanged(SizeChangedInfo sizeInfo) 
    { 
     base.OnRenderSizeChanged(sizeInfo); 
     UpdateOverlaySize(); 
    } 

    protected override void OnRender(DrawingContext drawingContext) 
    { 
     base.OnRender(drawingContext); 
     if (_transparentInputWindow.Visibility != Visibility.Visible) 
     { 
      UpdateOverlaySize(); 
      _transparentInputWindow.Show(); 
      _parentWindow = GetParentWindow(this); 
      _transparentInputWindow.Owner = _parentWindow; 
      _parentWindow.LocationChanged += ParentWindow_LocationChanged; 
      _parentWindow.SizeChanged += ParentWindow_SizeChanged; 
     } 
    } 

    private static Window GetParentWindow(DependencyObject o) 
    { 
     var parent = VisualTreeHelper.GetParent(o); 
     if (parent != null) 
      return GetParentWindow(parent); 
     var fe = o as FrameworkElement; 
     if (fe is Window) 
      return fe as Window; 
     if (fe != null && fe.Parent != null) 
      return GetParentWindow(fe.Parent); 
     throw new ApplicationException("A window parent could not be found for " + o); 
    } 

    private void ParentWindow_LocationChanged(object sender, EventArgs e) 
    { 
     UpdateOverlaySize(); 
    } 

    private void ParentWindow_SizeChanged(object sender, SizeChangedEventArgs e) 
    { 
     UpdateOverlaySize(); 
    } 

    private void UpdateOverlaySize() 
    { 
     var hostTopLeft = PointToScreen(new Point(0, 0)); 
     _transparentInputWindow.Left = hostTopLeft.X; 
     _transparentInputWindow.Top = hostTopLeft.Y; 
     _transparentInputWindow.Width = ActualWidth; 
     _transparentInputWindow.Height = ActualHeight; 
    } 
} 

Answer 4

如果有人發現自己不滿意的黑客，設置WindowsFormsHost的可見性摺疊或隱藏總是一個選項。

Answer 5

我遲到了，我知道，但我最近遇到了這個問題，使用WebBrowser控件。

最終的解決方法是創建一個Web瀏覽器的屏幕截圖，只要我在頂部託管一個模式對話框。由於這是一個有點繁瑣，我把它變成了Github上項目，希望這有助於一點 -

https://github.com/chris84948/AirspaceFixer

（這是對的NuGet也AirspaceFixer下）

一旦你的項目你需要做的就是這個

xmlns:asf="clr-namespace:AirspaceFixer;assembly=AirspaceFixer" 

<asf:AirspacePanel FixAirspace="{Binding FixAirspace}"> 
    <WebBrowser x:Name="Browser" /> 
</asf:AirspacePanel> 

哪裏FixAirspace是從內容的「真實」視圖切換到屏幕截圖或「假」的看法依賴屬性。