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Så här: Applicera ett riktlinjeset på en ritning

Det här exemplet visar hur du tillämpar en GuidelineSet på en DrawingGroup.

Klassen DrawingGroup är den enda typen av Drawing som har en GuidelineSet egenskap. Om du vill tillämpa en GuidelineSet på en annan typ av Drawinglägger du till den i en DrawingGroup och tillämpar sedan GuidelineSet på din DrawingGroup.

Exempel

I följande exempel skapas två DrawingGroup objekt som är nästan identiska. den enda skillnaden är: den andra DrawingGroup har en GuidelineSet och den första inte.

Följande bild visar utdata från exemplet. Eftersom återgivningsskillnaden mellan de två DrawingGroup objekten är så diskret, förstoras delar av ritningarna.

en DrawingGroup med och utan en GuidelineSet 

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>
    /// This example shows how to apply a GuidelineSet to
    /// a drawing.
    /// </summary>
    public class DrawingGroupGuidelineSetExample : Page
    {
        public DrawingGroupGuidelineSetExample()
        {

            //
            // Create a DrawingGroup
            // that has no guideline set
            //
            GeometryDrawing drawing1 = new GeometryDrawing(
                    Brushes.Black,
                    null,
                    new RectangleGeometry(new Rect(0,20,30,80))
                );

            GeometryGroup whiteRectangles = new GeometryGroup();
            whiteRectangles.Children.Add(new RectangleGeometry(new Rect(5.5, 25, 20, 20)));
            whiteRectangles.Children.Add(new RectangleGeometry(new Rect(5.5, 50, 20, 20)));
            whiteRectangles.Children.Add(new RectangleGeometry(new Rect(5.5, 75, 20, 20)));

            GeometryDrawing drawing2 = new GeometryDrawing(
                    Brushes.White,
                    null,
                    whiteRectangles
                );

            // Create a DrawingGroup
            DrawingGroup drawingGroupWithoutGuidelines = new DrawingGroup();
            drawingGroupWithoutGuidelines.Children.Add(drawing1);
            drawingGroupWithoutGuidelines.Children.Add(drawing2);

            // Use an Image control and a DrawingImage to
            // display the drawing.
            DrawingImage drawingImage01 = new DrawingImage(drawingGroupWithoutGuidelines);

            // Freeze the DrawingImage for performance benefits.
            drawingImage01.Freeze();

            Image image01 = new Image();
            image01.Source = drawingImage01;
            image01.Stretch = Stretch.None;
            image01.HorizontalAlignment = HorizontalAlignment.Left;
            image01.Margin = new Thickness(10);

            //
            // Create another DrawingGroup and apply
            // a blur effect to it.
            //

            // Create a clone of the first DrawingGroup.
            DrawingGroup drawingGroupWithGuidelines =
                drawingGroupWithoutGuidelines.Clone();

            // Create a guideline set.
            GuidelineSet guidelines = new GuidelineSet();
            guidelines.GuidelinesX.Add(5.5);
            guidelines.GuidelinesX.Add(25.5);
            guidelines.GuidelinesY.Add(25);
            guidelines.GuidelinesY.Add(50);
            guidelines.GuidelinesY.Add(75);

            // Apply it to the drawing group.
            drawingGroupWithGuidelines.GuidelineSet = guidelines;

            // Use another Image control and DrawingImage
            // to display the drawing.
            DrawingImage drawingImage02 = new DrawingImage(drawingGroupWithGuidelines);

            // Freeze the DrawingImage for performance benefits.
            drawingImage02.Freeze();

            Image image02 = new Image();
            image02.Source = drawingImage02;
            image02.Stretch = Stretch.None;
            image02.HorizontalAlignment = HorizontalAlignment.Left;
            image02.Margin = new Thickness(50, 10, 10, 10);

            StackPanel mainPanel = new StackPanel();
            mainPanel.Orientation = Orientation.Horizontal;
            mainPanel.HorizontalAlignment = HorizontalAlignment.Left;
            mainPanel.Margin = new Thickness(20);
            mainPanel.Children.Add(image01);
            mainPanel.Children.Add(image02);

            //
            // Use a DrawingBrush to create a grid background.
            //
            GeometryDrawing backgroundRectangleDrawing =
                new GeometryDrawing(
                    Brushes.White,
                    null,
                    new RectangleGeometry(new Rect(0,0,1,1))
                );
            PolyLineSegment backgroundLine1 = new PolyLineSegment();
            backgroundLine1.Points.Add(new Point(1, 0));
            backgroundLine1.Points.Add(new Point(1, 0.1));
            backgroundLine1.Points.Add(new Point(0, 0.1));
            PathFigure line1Figure = new PathFigure();
            line1Figure.Segments.Add(backgroundLine1);
            PathGeometry backgroundLine1Geometry = new PathGeometry();
            backgroundLine1Geometry.Figures.Add(line1Figure);
            GeometryDrawing backgroundLineDrawing1 = new GeometryDrawing(
                    new SolidColorBrush(Color.FromArgb(255,204,204,255)),
                    null,
                    backgroundLine1Geometry
                );
            PolyLineSegment backgroundLine2 = new PolyLineSegment();
            backgroundLine2.Points.Add(new Point(0, 1));
            backgroundLine2.Points.Add(new Point(0.1, 1));
            backgroundLine2.Points.Add(new Point(0.1, 0));
            PathFigure line2Figure = new PathFigure();
            line2Figure.Segments.Add(backgroundLine2);
            PathGeometry backgroundLine2Geometry = new PathGeometry();
            backgroundLine2Geometry.Figures.Add(line2Figure);
            GeometryDrawing backgroundLineDrawing2 = new GeometryDrawing(
                    new SolidColorBrush(Color.FromArgb(255, 204, 204, 255)),
                    null,
                    backgroundLine2Geometry
                );

            DrawingGroup backgroundGroup = new DrawingGroup();
            backgroundGroup.Children.Add(backgroundRectangleDrawing);
            backgroundGroup.Children.Add(backgroundLineDrawing1);
            backgroundGroup.Children.Add(backgroundLineDrawing2);

            DrawingBrush gridPatternBrush = new DrawingBrush(backgroundGroup);
            gridPatternBrush.Viewport = new Rect(0, 0, 10, 10);
            gridPatternBrush.ViewportUnits = BrushMappingMode.Absolute;
            gridPatternBrush.TileMode = TileMode.Tile;
            gridPatternBrush.Freeze();

            Border mainBorder = new Border();
            mainBorder.Background = gridPatternBrush;
            mainBorder.BorderThickness = new Thickness(1);
            mainBorder.BorderBrush = Brushes.Gray;
            mainBorder.HorizontalAlignment = HorizontalAlignment.Left;
            mainBorder.VerticalAlignment = VerticalAlignment.Top;
            mainBorder.Margin = new Thickness(20);
            mainBorder.Child = mainPanel;

            //
            // Add the items to the page.
            //
            this.Content = mainBorder;
            this.Background = Brushes.White;
        }
    }
}

<Page 
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  xmlns:PresentationOptions="http://schemas.microsoft.com/winfx/2006/xaml/presentation/options" 
  xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
  mc:Ignorable="PresentationOptions">
  <Border BorderThickness="1" BorderBrush="Gray" 
    HorizontalAlignment="Left" VerticalAlignment="Top"
    Margin="20">
    <StackPanel Margin="20" Orientation="Horizontal">


        <Image Stretch="None" Margin="10">
          <Image.Source>
            <DrawingImage PresentationOptions:Freeze="True">
              <DrawingImage.Drawing>

                <!-- This DrawingGroup has no GuidelineSet. -->
                <DrawingGroup>
                  <GeometryDrawing Brush="Black">
                    <GeometryDrawing.Geometry>
                      <RectangleGeometry Rect="0,20,30,80" />
                    </GeometryDrawing.Geometry>
                  </GeometryDrawing>
                  <GeometryDrawing Brush="White">
                    <GeometryDrawing.Geometry>
                      <GeometryGroup>
                        <RectangleGeometry Rect="5.5,25, 20,20" />
                        <RectangleGeometry Rect="5.5,50, 20,20" />
                        <RectangleGeometry Rect="5.5,75, 20,20" />
                      </GeometryGroup>
                    </GeometryDrawing.Geometry>
                  </GeometryDrawing>
                </DrawingGroup>
              </DrawingImage.Drawing>
            </DrawingImage>
          </Image.Source>
        </Image>

        <Image Stretch="None" Margin="50,10,10,10">
          <Image.Source>
            <DrawingImage PresentationOptions:Freeze="True">
              <DrawingImage.Drawing>

                <!-- This DrawingGroup has a GuidelineSet. -->
                <DrawingGroup>
                  <GeometryDrawing Brush="Black">
                    <GeometryDrawing.Geometry>
                      <RectangleGeometry Rect="0,20,30,80" />
                    </GeometryDrawing.Geometry>
                  </GeometryDrawing>
                  <GeometryDrawing Brush="White">
                    <GeometryDrawing.Geometry>
                      <GeometryGroup>
                        <RectangleGeometry Rect="5.5,25, 20,20" />
                        <RectangleGeometry Rect="5.5,50, 20,20" />
                        <RectangleGeometry Rect="5.5,75, 20,20" />
                      </GeometryGroup>
                    </GeometryDrawing.Geometry>
                  </GeometryDrawing>
                  <DrawingGroup.GuidelineSet>

                    <!-- The GuidelineSet -->
                    <GuidelineSet
                      GuidelinesX="5.5,25.5" GuidelinesY="25,50,75" />
                  </DrawingGroup.GuidelineSet>
                </DrawingGroup>
              </DrawingImage.Drawing>
            </DrawingImage>
          </Image.Source>
        </Image>
    </StackPanel>

    <Border.Background>
      <DrawingBrush  Viewport="0,0,10,10" ViewportUnits="Absolute" TileMode="Tile"
        PresentationOptions:Freeze="True">
        <DrawingBrush.Drawing>
          <DrawingGroup>
            <GeometryDrawing Brush="White">
              <GeometryDrawing.Geometry>
                <RectangleGeometry Rect="0,0,1,1" />
              </GeometryDrawing.Geometry>
            </GeometryDrawing>
            <GeometryDrawing Geometry="M0,0 L1,0 1,0.1, 0,0.1Z " Brush="#CCCCFF" />
            <GeometryDrawing Geometry="M0,0 L0,1 0.1,1, 0.1,0Z" Brush="#CCCCFF" />
          </DrawingGroup>
        </DrawingBrush.Drawing>
      </DrawingBrush>    
    </Border.Background>
  </Border>
</Page>

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