C# Windows.UIElement类代码示例

 public HelpAdorner(UIElement element)
     : base(element)
 {
     this.MouseEnter += HelpAdorner_MouseEnter;
     this.MouseLeave += HelpAdorner_MouseLeave;
     this.MouseDown += HelpAdorner_MouseDown;
 }

 protected DropTargetAdorner(UIElement adornedElement)
   : base(adornedElement)
 {
   _adornerLayer = AdornerLayer.GetAdornerLayer(adornedElement);
   _adornerLayer.Add(this);
   IsHitTestVisible = false;
 }

        /// <summary>
        /// Starts an animation to a particular value on the specified dependency property.
        /// You can pass in an event handler to call when the animation has completed.
        /// </summary>
        public static void StartAnimation(UIElement animatableElement, DependencyProperty dependencyProperty, double toValue, double animationDurationSeconds, EventHandler completedEvent)
        {
            double fromValue = (double)animatableElement.GetValue(dependencyProperty);

            DoubleAnimation animation = new DoubleAnimation();
            animation.From = fromValue;
            animation.To = toValue;
            animation.Duration = TimeSpan.FromSeconds(animationDurationSeconds);

            animation.Completed += delegate(object sender, EventArgs e)
            {
                //
                // When the animation has completed bake final value of the animation
                // into the property.
                //
                animatableElement.SetValue(dependencyProperty, animatableElement.GetValue(dependencyProperty));
                CancelAnimation(animatableElement, dependencyProperty);

                if (completedEvent != null)
                {
                    completedEvent(sender, e);
                }
            };

            animation.Freeze();

            animatableElement.BeginAnimation(dependencyProperty, animation);
        }

 public void RemoveCustomControl(UIElement control)
 {
     _customControlSurface.RemoveControl(control);
     var customControlInfo = _customControls.FirstOrDefault(it => it.Control == control);
     if (customControlInfo != null)
         _customControls.Remove(customControlInfo);
 }

		// ********************************************************************
		// Public Methods
		// ********************************************************************
		#region Public Methods

		/// <summary>
		/// Constructor. Initializes class fields.
		/// </summary>
        public AdornerCursorCoordinateDrawer(XYLineChart xyLineChart, UIElement adornedElement, MatrixTransform shapeTransform)
			: base(adornedElement)
		{
			elementTransform = shapeTransform;
			IsHitTestVisible = false;
		    this.xyLineChart = xyLineChart;
		}

 public static Point GetPosition(RoutedEventArgs args, UIElement relativeTo)
 {
     if (args is MouseEventArgs)
     {
         return ((MouseEventArgs) args).GetPosition(relativeTo);
     }
     if (args is ManipulationDeltaEventArgs)
     {
         var manipulationDeltaEventArg = args as ManipulationDeltaEventArgs;
         return
             UIElementEx.C1TransformToVisual(manipulationDeltaEventArg.ManipulationContainer as UIElement, relativeTo)
                 .Transform(manipulationDeltaEventArg.ManipulationOrigin);
     }
     if (args is ManipulationStartedEventArgs)
     {
         var manipulationStartedEventArg = args as ManipulationStartedEventArgs;
         return
             UIElementEx.C1TransformToVisual(manipulationStartedEventArg.ManipulationContainer as UIElement, relativeTo)
                 .Transform(manipulationStartedEventArg.ManipulationOrigin);
     }
     if (!(args is TouchEventArgs) || relativeTo != null && relativeTo == null)
     {
         return new Point();
     }
     return ((TouchEventArgs) args).GetTouchPoint(relativeTo).Position;
 }

 public AdornerChartMarkers(UIElement adornedElement, Transform shapeTransform, IList<ChartMarkerSet> markerSets, XYLineChart parentChart) : base(adornedElement)
 {
     _adornedElement = adornedElement;
     _parentChart = parentChart;
     _markerSets = markerSets;
     _transform = shapeTransform;
 }

        public DragAdorner(UIElement owner, UIElement adornElement, bool useVisualBrush, double opacity)
            : base(owner)
        {
            this.owner  = owner;

            if (useVisualBrush)
            {
                VisualBrush brush   = new VisualBrush(adornElement);
                Rectangle   rect    = new Rectangle();

                brush.Opacity       = opacity;
                rect.RadiusX        = 3;
                rect.RadiusY        = 3;
                rect.Width          = adornElement.DesiredSize.Width;
                rect.Height         = adornElement.DesiredSize.Height;

                this.XCenter        = adornElement.DesiredSize.Width / 2;
                this.YCenter        = adornElement.DesiredSize.Height / 2;

                rect.Fill = brush;

                this.child = rect;
            }
            else
            {
                this.child = adornElement;
            }
        }

    public static Cursor CreateCursor(UIElement element, int xHotSpot, 
        int yHotSpot)
    {
      element.Measure(new Size(double.PositiveInfinity, 
        double.PositiveInfinity));
      element.Arrange(new Rect(0, 0, element.DesiredSize.Width, 
        element.DesiredSize.Height));

      RenderTargetBitmap rtb = 
        new RenderTargetBitmap((int)element.DesiredSize.Width, 
          (int)element.DesiredSize.Height, 96, 96, PixelFormats.Pbgra32);
      rtb.Render(element);

      PngBitmapEncoder encoder = new PngBitmapEncoder();
      encoder.Frames.Add(BitmapFrame.Create(rtb));

      MemoryStream ms = new MemoryStream();
      encoder.Save(ms);

      System.Drawing.Bitmap bmp = new System.Drawing.Bitmap(ms);

      ms.Close();
      ms.Dispose();     

      Cursor cur = InternalCreateCursor(bmp, xHotSpot, yHotSpot);

      bmp.Dispose();

      return cur;
    }

 public DragBehavior(UIElement element)
 {
     _element = element;
     element.MouseLeftButtonDown += OnMouseButtonDown;
     element.MouseLeftButtonUp += OnMouseButtonUp;
     element.MouseMove += OnMouseMove;
 }

 public ContentAdorner(UIElement element, UIElement adornedElement)
     : base(adornedElement)
 {
     _element = element;
     AddLogicalChild(element);
     AddVisualChild(element);
 }

 /// <summary>
 /// </summary>
 /// <param name="source"> </param>
 /// <param name="scale"> </param>
 /// <param name="quality"> </param>
 /// <returns> </returns>
 public static byte[] GetJpgImage(UIElement source, double scale, int quality)
 {
     var actualHeight = source.RenderSize.Height;
     var actualWidth = source.RenderSize.Width;
     var renderHeight = actualHeight * scale;
     var renderWidth = actualWidth * scale;
     var renderTarget = new RenderTargetBitmap((int) renderWidth, (int) renderHeight, 96, 96, PixelFormats.Pbgra32);
     var sourceBrush = new VisualBrush(source);
     var drawingVisual = new DrawingVisual();
     var drawingContext = drawingVisual.RenderOpen();
     using (drawingContext)
     {
         drawingContext.PushTransform(new ScaleTransform(scale, scale));
         drawingContext.DrawRectangle(sourceBrush, null, new Rect(new Point(0, 0), new Point(actualWidth, actualHeight)));
     }
     renderTarget.Render(drawingVisual);
     var jpgEncoder = new JpegBitmapEncoder
     {
         QualityLevel = quality
     };
     jpgEncoder.Frames.Add(BitmapFrame.Create(renderTarget));
     Byte[] imageArray;
     using (var outputStream = new MemoryStream())
     {
         jpgEncoder.Save(outputStream);
         imageArray = outputStream.ToArray();
     }
     return imageArray;
 }

 public void Initialize(UIElement element)
 {
     _element = element;
     element.MouseLeftButtonDown += MouseLeftButtonDown;
     element.MouseLeftButtonUp += MouseLeftButtonUp;
     element.MouseMove += MouseMove;
 }

 private void SendToUIThread(UIElement element, string text)
 {
     element.Dispatcher.BeginInvoke(
         new Action(() => { SendKeys.Send(text); }),
         DispatcherPriority.Input
     );
 }

 /// <summary>
 ///     Initializes a new instance of the SizeChangedinfo class.
 /// </summary>
 /// <param name="element"> 
 ///     The element which size is changing.
 /// </param> 
 /// <param name="previousSize"> 
 ///     The size of the object before update. New size is element.RenderSize
 /// </param> 
 /// <param name="widthChanged">
 /// The flag indicating that width component of the size changed. Note that due to double math
 /// effects, the it may be (previousSize.Width != newSize.Width) and widthChanged = true.
 /// This may happen in layout when sizes of objects are fluctuating because of a precision "jitter" of 
 /// the input parameters, but the overall scene is considered to be "the same" so no visible changes
 /// will be detected. Typically, the handler of SizeChangedEvent should check this bit to avoid 
 /// invalidation of layout if the dimension didn't change. 
 /// </param>
 /// <param name="heightChanged"> 
 /// The flag indicating that height component of the size changed. Note that due to double math
 /// effects, the it may be (previousSize.Height != newSize.Height) and heightChanged = true.
 /// This may happen in layout when sizes of objects are fluctuating because of a precision "jitter" of
 /// the input parameters, but the overall scene is considered to be "the same" so no visible changes 
 /// will be detected. Typically, the handler of SizeChangedEvent should check this bit to avoid
 /// invalidation of layout if the dimension didn't change. 
 /// </param> 
 public SizeChangedInfo(UIElement element, Size previousSize, bool widthChanged, bool heightChanged)
 { 
     _element = element;
     _previousSize = previousSize;
     _widthChanged = widthChanged;
     _heightChanged = heightChanged; 
 }