Configuración de una ventana XAML siempre en la parte superior (pero no en la propiedad TopMost)

Question

Estoy desarrollando una aplicación basada en OptiTrack SDK (de NaturalPoint). Necesito ejecutar la ventana de la aplicación como "Siempre arriba". La ventana está diseñada en XAML y se controla en la clase "CameraView", pero no parece incluir una propiedad "TopMost" o equivalente. Se adjuntan el código de "CameraView.xaml.cs" y el código de "CameraView.xaml" que son parte de OptiTrack SDK (NaturalPoint) llamado "Single_Camera_CSharp_.NET_3.0".

Se podría esperar que la clase CameraView contenga propiedades o miembros para establecer la posición de la ventana en la pantalla o para establecerla en TopMost, pero en la búsqueda no encontré nada. Me pregunto qué debería hacer.

Gracias, Brian

================

"CameraView.xaml.cs"

using System; 
using System.IO; 
using System.Net; 
using System.Windows; 
using System.Windows.Controls; 
using System.Windows.Data; 
using System.Windows.Media; 
using System.Windows.Media.Animation; 
using System.Windows.Navigation; 
using System.Drawing.Imaging; 
using System.Drawing.Drawing2D; 
using System.Windows.Threading; 

namespace TestProject 
{ 
public partial class CameraView 
{ 
private const int NP_OPTION_OBJECT_COLOR_OPTION = 3; 
private const int NP_OPTION_VIDEO_TYPE = 48; 
private const int NP_OPTION_NUMERIC_DISPLAY_ON = 71; 
private const int NP_OPTION_NUMERIC_DISPLAY_OFF = 72; 
private const int NP_OPTION_FETCH_RLE = 73; 
private const int NP_OPTION_FETCH_GRAYSCALE = 74; 
private const int NP_OPTION_FRAME_DECIMATION = 52; 
private const int NP_OPTION_INTENSITY = 50; 
private const int NP_OPTION_SEND_EMPTY_FRAMES = 41; 
private const int NP_OPTION_THRESHOLD = 5; 
private const int NP_OPTION_EXPOSURE = 46; 
private const int NP_OPTION_SEND_FRAME_MASK = 73; 
private const int NP_OPTION_TEXT_OVERLAY_OPTION = 74; 
// public delegate void OnCameraViewCreate(CameraView camera); 
// public static OnCameraViewCreate onCameraViewCreate; 
private System.Drawing.Bitmap raw = new System.Drawing.Bitmap(353, 288, System.Drawing.Imaging.PixelFormat.Format32bppArgb); 
private int mFrameCounter; 
private int mDisplayCounter; 
private DispatcherTimer timer1 = new DispatcherTimer(); 
private bool mVideoFrameAvailable = false; 
private int mNumeric = -1; 
private bool mGreyscale = false; 
private bool mOverlay = true; 
public CameraView() 
{ 
this.InitializeComponent(); 

timer1.Interval = new TimeSpan(0, 0, 0, 0, 10); 
timer1.Tick += new EventHandler(timer1_Tick); 
} 

public int Numeric 
{ 
get { return mNumeric; } 
set 
{ 
mNumeric = value % 100; 
if (mNumeric >= 0) 
{ 
if (Camera != null) 
Camera.SetOption(NP_OPTION_NUMERIC_DISPLAY_ON, value % 100); 
} 
} 
} 

private bool CameraRunning = false; 
private OptiTrack.NPCamera mCamera; 
public OptiTrack.NPCamera Camera 
{ 
get { return mCamera; } 
set 
{ 
if (mCamera == value) return; //== Don't do anything if you're assigning the same camera == 

if (mCamera != null) 
{ 
//== Shut the selected camera down ==<< 

if (CameraRunning) 
{ 
CameraRunning = false; 
mCamera.Stop(); 
mCamera.FrameAvailable -= FrameAvailable; 
} 
} 

mCamera = value; 

if (mCamera == null) 
{ 
mNumeric = -1; 
} 
else 
{ 
serialLabel.Content = "Camera "+mCamera.SerialNumber.ToString(); //mNumeric.ToString(); 
} 
} 
} 

private void FrameAvailable(OptiTrack.NPCamera Camera) 
{ 
mFrameCounter++; 

try 
{ 
OptiTrack.NPCameraFrame frame = Camera.GetFrame(0); 
int id = frame.Id; 
if (CameraRunning) 
{ 
GetFrameData(Camera, frame); 
} 

frame.Free(); 
} 
catch (Exception) 
{ 
int r = 0; 
r++; 
} 
} 
private void GetFrameData(OptiTrack.NPCamera camera, OptiTrack.NPCameraFrame frame) 
{ 
BitmapData bmData = raw.LockBits(new System.Drawing.Rectangle(0, 0, raw.Width, raw.Height), 
ImageLockMode.ReadWrite, System.Drawing.Imaging.PixelFormat.Format32bppArgb); 

int stride = bmData.Stride; 
System.IntPtr bufferPtr = bmData.Scan0; 
unsafe 
{ 
byte* buffer = (byte*)(void*)bufferPtr; 
camera.GetFrameImage(frame, bmData.Width, bmData.Height, bmData.Stride, 32, ref buffer[0]); 
} 
raw.UnlockBits(bmData); 
mVideoFrameAvailable = true; 
} 

private void timer1_Tick(object sender, EventArgs e) 
{ 
if (CameraRunning && mVideoFrameAvailable) 
{ 
mVideoFrameAvailable = false; 
cameraImage.Source = Img(raw); 
mDisplayCounter++; 
} 
} 

private System.Windows.Media.ImageSource Img(System.Drawing.Bitmap img) 
{ 
System.Drawing.Imaging.BitmapData bmData = img.LockBits(new System.Drawing.Rectangle(0, 0, img.Width, img.Height), 
System.Drawing.Imaging.ImageLockMode.ReadWrite, System.Drawing.Imaging.PixelFormat.Format32bppPArgb); 

System.Windows.Media.Imaging.BitmapSource bitmap = System.Windows.Media.Imaging.BitmapSource.Create(
img.Width, img.Height, 96, 96, PixelFormats.Bgra32, 
System.Windows.Media.Imaging.BitmapPalettes.WebPalette, 
bmData.Scan0, bmData.Stride * bmData.Height, bmData.Stride); 
img.UnlockBits(bmData); 

return bitmap; 
} 
private void startStopButton_Click(object sender, RoutedEventArgs e) 
{ 
if (CameraRunning) 
StopCamera(); 
else 
StartCamera(); 
} 

public void StartCamera() 
{ 
if (Camera != null) 
{ 
mFrameCounter = 0; 
mDisplayCounter = 0; 

Camera.FrameAvailable += FrameAvailable; 

Camera.SetOption(NP_OPTION_VIDEO_TYPE, 0); 
Camera.SetOption(NP_OPTION_FRAME_DECIMATION, 1); 

Camera.SetOption(NP_OPTION_INTENSITY, 0); 
Camera.SetOption(NP_OPTION_EXPOSURE, 10); 
Camera.SetOption(NP_OPTION_THRESHOLD, 50); 
Camera.SetOption(NP_OPTION_OBJECT_COLOR_OPTION, 0); 
SetOverlayOption(); 
SetGreyscaleOption(); 

timer1.Start(); 
Camera.Start(); 
CameraRunning = true; 
this.Numeric = mNumeric; 

startStopButton.Content = "Stop Camera"; 
} 
} 
private void SetGreyscaleOption() 
{ 
if(mGreyscale) 
Camera.SetOption(NP_OPTION_VIDEO_TYPE, 1); 
else 
Camera.SetOption(NP_OPTION_VIDEO_TYPE, 0); 
} 
private void SetOverlayOption() 
{ 
if(mOverlay) 
Camera.SetOption(NP_OPTION_TEXT_OVERLAY_OPTION, 255); 
else 
Camera.SetOption(NP_OPTION_TEXT_OVERLAY_OPTION, 0); 
} 

public void StopCamera() 
{ 
if (Camera != null) 
{ 
Camera.Stop(); 
timer1.Stop(); 
CameraRunning = false; 
Camera.FrameAvailable -= FrameAvailable; 
Camera.SetOption(NP_OPTION_NUMERIC_DISPLAY_OFF, 0); 
startStopButton.Content = "Start Camera"; 
} 
} 

private void greyscaleButton_Click(object sender, RoutedEventArgs e) 
{ 
if(mGreyscale) 
mGreyscale = false; 
else 
mGreyscale = true; 
SetGreyscaleOption(); 
} 

private void OverlayButton_Click(object sender, RoutedEventArgs e) 
{ 
if(mOverlay) 
mOverlay = false; 
else 
mOverlay = true; 
SetOverlayOption(); 
} 

private void exposureSlider_ValueChanged(object sender, RoutedEventArgs e) 
{ 
if (mCamera!=null) 
{ 
mCamera.SetOption(NP_OPTION_EXPOSURE, (int) this.exposureSlider.Value); 
} 
} 

private void thresholdSlider_ValueChanged(object sender, RoutedEventArgs e) 
{ 
if (mCamera != null) 
{ 
mCamera.SetOption(NP_OPTION_THRESHOLD, (int)this.thresholdSlider.Value); 
} 
} 

private void optionsButton_Click(object sender, RoutedEventArgs e) 
{ 
if (!propertyPanel.IsVisible) 
propertyPanel.Visibility = Visibility.Visible; 
else 
propertyPanel.Visibility = Visibility.Collapsed; 
} 
} 
} 

=== =============

"CameraView.xaml"

<UserControl 
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
x:Class="TestProject.CameraView" 
x:Name="CameraView1" 
Width="Auto" Height="Auto" 
xmlns:d="http://schemas.microsoft.com/expression/blend/2006" 
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
    mc:Ignorable="d" 
> 

<Grid x:Name="LayoutRoot" Width="Auto" Height="Auto"> 
    <Grid.Background> 
    <x:Null/> 
    </Grid.Background> 
    <Grid.ColumnDefinitions> 
    <ColumnDefinition Width="*"/> 
    <ColumnDefinition Width="113.904"/> 
    </Grid.ColumnDefinitions> 
    <Grid.RowDefinitions> 
    <RowDefinition Height="26.667"/> 
    <RowDefinition Height="*"/> 
    </Grid.RowDefinitions> 
    <Grid Margin="0,0,0,0" Grid.ColumnSpan="2"> 
    <Rectangle RadiusX="1.25" RadiusY="1.25" Margin="0,0,0,0" VerticalAlignment="Stretch"> 
    <Rectangle.Fill> 
    <LinearGradientBrush EndPoint="0.492,0.149" StartPoint="0.492,0.843"> 
     <GradientStop Color="#FF000000" Offset="0"/> 
     <GradientStop Color="#FF23283F" Offset="1"/> 
    </LinearGradientBrush> 
    </Rectangle.Fill> 
    <Rectangle.Stroke> 
    <LinearGradientBrush EndPoint="0.291,-4.231" StartPoint="1.668,18.025"> 
     <GradientStop Color="#FF000000" Offset="0"/> 
     <GradientStop Color="#FFFFFFFF" Offset="1"/> 
    </LinearGradientBrush> 
    </Rectangle.Stroke> 
    </Rectangle> 
    <Rectangle RadiusX="3.333" RadiusY="3.333" Opacity="0.13" Margin="0,0,0,13"> 
    <Rectangle.Fill> 
    <SolidColorBrush Color="#FFFFFFFF"/> 
    </Rectangle.Fill> 
    <Rectangle.Stroke> 
    <x:Null/> 
    </Rectangle.Stroke> 
    </Rectangle> 
    </Grid> 
    <Image Margin="0,0,0,0" x:Name="cameraImage" Grid.ColumnSpan="2" Grid.Row="1"/> 
    <Label x:Name="serialLabel" FontSize="10" FontWeight="Bold" Foreground="#FFDEDADA" Content="Camera 10024" HorizontalAlignment="Right" Margin="0,0,4,0" VerticalAlignment="Top" Grid.Column="1"> 
    <Label.BitmapEffect> 
    <OuterGlowBitmapEffect GlowColor="#FF000000" GlowSize="4" Opacity="0.7"/> 
    </Label.BitmapEffect> 
    </Label> 
    <WrapPanel Margin="3,3,3,3"> 
    <Button HorizontalAlignment="Stretch" Margin="0,0,0,0" x:Name="startStopButton" Width="100" Height="Auto" BorderThickness="0,0,0,0" Content="Start Camera" Click="startStopButton_Click"/> 
    <Button x:Name="optionsButton" Width="61.474" Height="Auto" BorderThickness="0,0,0,0" Content="Options" Click="optionsButton_Click"/> 
    </WrapPanel> 
    <Grid Visibility="Visible" d:LayoutOverrides="HorizontalAlignment, VerticalAlignment" HorizontalAlignment="Right" Margin="0,0,16,16" x:Name="propertyPanel" VerticalAlignment="Bottom" Width="169.237" Height="81.455" Grid.ColumnSpan="2" Grid.Row="1"> 
    <Rectangle Stroke="#FFFFFFFF" StrokeThickness="3" Margin="0,0,0,0"> 
    <Rectangle.BitmapEffect> 
    <DropShadowBitmapEffect/> 
    </Rectangle.BitmapEffect> 
    <Rectangle.Fill> 
    <LinearGradientBrush EndPoint="1,0.5" StartPoint="0,0.5"> 
     <GradientStop Color="#FF1E212F" Offset="0"/> 
     <GradientStop Color="#FF313551" Offset="1"/> 
    </LinearGradientBrush> 
    </Rectangle.Fill> 
    </Rectangle> 
    <Slider HorizontalAlignment="Stretch" Margin="62.633,5,4.681,0" x:Name="exposureSlider" VerticalAlignment="Top" Width="Auto" Height="Auto" Orientation="Horizontal" Maximum="255" ValueChanged="exposureSlider_ValueChanged"/> 
    <Label x:Name="serialLabel_Copy" FontSize="10" FontWeight="Bold" Foreground="#FFDEDADA" Content="Exposure" HorizontalAlignment="Left" Margin="3.853,3.853,0,0" VerticalAlignment="Top" Width="57.352"> 
    <Label.BitmapEffect> 
    <OuterGlowBitmapEffect GlowColor="#FF000000" GlowSize="4" Opacity="0.7"/> 
    </Label.BitmapEffect> 
    </Label> 
    <Label x:Name="serialLabel_Copy1" FontSize="10" FontWeight="Bold" Foreground="#FFDEDADA" Content="Threshold" d:LayoutOverrides="Height" HorizontalAlignment="Left" Margin="3.853,27.691,0,0" VerticalAlignment="Top" Width="59.829"> 
    <Label.BitmapEffect> 
    <OuterGlowBitmapEffect GlowColor="#FF000000" GlowSize="4" Opacity="0.7"/> 
    </Label.BitmapEffect> 
    </Label> 
    <Slider x:Name="thresholdSlider" Width="Auto" Orientation="Horizontal" Maximum="253" d:LayoutOverrides="Height, Margin" Margin="62.633,27.691,4.681,0" VerticalAlignment="Top" Minimum="54" Value="54" ValueChanged="thresholdSlider_ValueChanged"/> 
    <Button x:Name="greyScaleButton" Width="75.333" Content="Greyscale" Click="greyscaleButton_Click" HorizontalAlignment="Left" Height="21" d:LayoutOverrides="Height" Margin="8,53.761,0,0" VerticalAlignment="Top"/> 
    <Button x:Name="Overlay" Height="21" Content="Overlay" Click="OverlayButton_Click" d:LayoutOverrides="Height" HorizontalAlignment="Right" Margin="0,53.761,8,0" VerticalAlignment="Top" Width="64"/> 
    </Grid> 
</Grid> 
</UserControl> 

Answer 1

La propiedad Topmost existe en la clase Window: http://msdn.microsoft.com/en-us/library/system.windows.window.topmost.aspx.

Su clase CameraView se deriva de control de usuario, que es un tipo de control que se encuentra dentro de una ventana (u otro recipiente, tal como una página, pero eso no es importante en este caso). UserControl no tiene una propiedad Topmost porque no aparece de forma independiente en el escritorio.

Anfitrión su ángulo de cámara en una ventana y establecer el Window.Topmost:

<!-- MyWindow.xaml --> 
<Window ... 
     xmlns:local="clr-namespace:TestProject" 
     Topmost="True"> 
    <local:CameraView /> 
</Window> 

donde las elipses representan la mugre por defecto como x:Class y WPF xmlns declaraciones que Visual Studio crea para usted.

Answer 2

Esto es UserControl. Puede establecer la propiedad TopMost para Windows solo

Answer 3

En el código UserControl detrás, puede obtener una referencia a la ventana que lo hospeda, luego configure la propiedad Topmost. Ejemplo,

Window parent = Window.GetWindow(this); 
parent.Topmost = true;