本文整理匯總了C#中System.Windows.Media.DrawingGroup.OpacityMask屬性的典型用法代碼示例。如果您正苦於以下問題：C# DrawingGroup.OpacityMask屬性的具體用法？C# DrawingGroup.OpacityMask怎麽用？C# DrawingGroup.OpacityMask使用的例子？那麽, 這裏精選的屬性代碼示例或許可以為您提供幫助。
在下文中一共展示了DrawingGroup.OpacityMask屬性的1個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的C#代碼示例。
示例1: OpacityMaskExample
//引入命名空間
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
namespace SDKSample
{
/// <summary>
/// Shows how to create and apply an OpacityMask to
/// a DrawinGroup.
/// </summary>
public class OpacityMaskExample : Page
{
public OpacityMaskExample()
{
//
// Create a GeometryDrawing.
//
// Define the drawing's contents.
PathFigure pLineFigure = new PathFigure();
pLineFigure.StartPoint = new Point(25, 25);
PolyLineSegment pLineSegment = new PolyLineSegment();
pLineSegment.Points.Add(new Point(0, 50));
pLineSegment.Points.Add(new Point(25, 75));
pLineSegment.Points.Add(new Point(50, 50));
pLineSegment.Points.Add(new Point(25, 25));
pLineSegment.Points.Add(new Point(25, 0));
pLineFigure.Segments.Add(pLineSegment);
PathGeometry pGeometry = new PathGeometry();
pGeometry.Figures.Add(pLineFigure);
GeometryDrawing drawing1 = new GeometryDrawing(
Brushes.Lime,
new Pen(Brushes.Black, 10),
pGeometry
);
//
// Create another GeometryDrawing.
//
GeometryDrawing drawing2 = new GeometryDrawing(
Brushes.Lime,
new Pen(Brushes.Black, 2),
new EllipseGeometry(new Point(10, 10), 5, 5)
);
// Create the DrawingGroup and add the
// geometry drawings.
DrawingGroup aDrawingGroup = new DrawingGroup();
aDrawingGroup.Children.Add(drawing1);
aDrawingGroup.Children.Add(drawing2);
//
// Define an opacity mask and apply it to the
// drawing group.
//
RadialGradientBrush opacityMask = new RadialGradientBrush();
opacityMask.GradientStops.Add(new GradientStop(Color.FromArgb(255, 0, 0, 0), 0.0));
opacityMask.GradientStops.Add(new GradientStop(Color.FromArgb(0, 0, 0, 0), 0.55));
opacityMask.GradientStops.Add(new GradientStop(Color.FromArgb(255, 0, 0, 0), 0.65));
opacityMask.GradientStops.Add(new GradientStop(Color.FromArgb(0, 0, 0, 0), 0.75));
opacityMask.GradientStops.Add(new GradientStop(Color.FromArgb(255, 0, 0, 0), 0.80));
opacityMask.GradientStops.Add(new GradientStop(Color.FromArgb(0, 0, 0, 0), 0.90));
opacityMask.GradientStops.Add(new GradientStop(Color.FromArgb(255, 0, 0, 0), 1.0));
aDrawingGroup.OpacityMask = opacityMask;
// Use an Image control and a DrawingImage to
// display the drawing.
DrawingImage aDrawingImage = new DrawingImage(aDrawingGroup);
// Freeze the DrawingImage for performance benefits.
aDrawingImage.Freeze();
Image anImage = new Image();
anImage.Source = aDrawingImage;
anImage.Stretch = Stretch.None;
anImage.HorizontalAlignment = HorizontalAlignment.Left;
// Create a border around the images and add it to the
// page.
Border imageBorder = new Border();
imageBorder.BorderBrush = Brushes.Gray;
imageBorder.BorderThickness = new Thickness(1);
imageBorder.VerticalAlignment = VerticalAlignment.Top;
imageBorder.HorizontalAlignment = HorizontalAlignment.Left;
imageBorder.Margin = new Thickness(20);
imageBorder.Child = anImage;
this.Background = Brushes.White;
this.Margin = new Thickness(20);
this.Content = imageBorder;
}
}
}