DrawingGroup.Transform Propriété

Définition

Obtient ou définit la Transform qui est appliquée à ce DrawingGroup.Gets or sets the Transform that is applied to this DrawingGroup.

public:
 property System::Windows::Media::Transform ^ Transform { System::Windows::Media::Transform ^ get(); void set(System::Windows::Media::Transform ^ value); };
public System.Windows.Media.Transform Transform { get; set; }
member this.Transform : System.Windows.Media.Transform with get, set
Public Property Transform As Transform

Valeur de propriété

Transform

Transformation à appliquer à ce DrawingGroup.The transformation to apply to this DrawingGroup. La valeur par défaut est null.The default is null.

Exemples

Cet exemple montre comment appliquer un Transform à un Drawing .This example shows how to apply a Transform to a Drawing. Pour transformer un Drawing objet, vous devez l’ajouter à un DrawingGroup et définir la Transform propriété de l' DrawingGroup objet.To transform a Drawing object, you add it to a DrawingGroup and set the Transform property of the DrawingGroup object.

La DrawingGroup classe est le seul type d' Drawing objet qui prend en charge les transformations.The DrawingGroup class is the only type of Drawing object that supports transforms. Pour appliquer plusieurs transformations à un seul DrawingGroup , utilisez un TransformGroup .To apply multiple transforms to a single DrawingGroup, use a TransformGroup.

L’exemple suivant utilise un DrawingGroup pour combiner plusieurs GeometryDrawing objets et les transforme à l’aide d’un RotateTransform .The following example uses a DrawingGroup to combine several GeometryDrawing objects and then transforms them by using a RotateTransform.

L’illustration montre les DrawingGroup avant et après l' RotateTransform application de.The illustration shows the DrawingGroup before and after the RotateTransform is applied.

DrawingGroup pivotéA rotated DrawingGroup

using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;

namespace SDKSample
{
    public class TransformExample : Page
    {

        public TransformExample()
        {

            //
            // 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);

            //
            // Create a RotateTransform and apply it to the
            // drawing group.
            //
            RotateTransform rotation = new RotateTransform(
                45, // Angle 
                50, // CenterX
                75  // CenterY
                );
            aDrawingGroup.Transform = rotation;

            // 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;
        }
    }
}

<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"
  Background="White" Margin="20">
  
  <Border BorderBrush="Gray" BorderThickness="1" 
    HorizontalAlignment="Left" VerticalAlignment="Top"
    Margin="20">
    <Image Stretch="None" HorizontalAlignment="Left">
      <Image.Source>
        <DrawingImage PresentationOptions:Freeze="True">
          <DrawingImage.Drawing>

            <!-- A drawing group with a RotateTransform. -->
            <DrawingGroup>
              <GeometryDrawing Brush="Lime" Geometry="M 25,25 L 0,50 25,75 50,50 25,25 25,0">
                <GeometryDrawing.Pen>
                  <Pen Thickness="10" Brush="Black" />
                </GeometryDrawing.Pen>
              </GeometryDrawing>
              <GeometryDrawing Brush="Lime">
                <GeometryDrawing.Geometry>
                  <EllipseGeometry Center="10,10" RadiusX="5" RadiusY="5" />
                </GeometryDrawing.Geometry>
                <GeometryDrawing.Pen>
                  <Pen Thickness="2" Brush="Black" />
                </GeometryDrawing.Pen>
              </GeometryDrawing>

              <!-- Rotate the drawing 45 degrees about (50,75). -->
              <DrawingGroup.Transform>
                <RotateTransform CenterX="50" CenterY="75" Angle="45" />
              </DrawingGroup.Transform>

            </DrawingGroup>
          </DrawingImage.Drawing>
        </DrawingImage>
      </Image.Source>
    </Image>
  </Border>


</Page>

Remarques

Pour appliquer plusieurs transformations à un seul DrawingGroup , utilisez un TransformGroup .To apply multiple transforms to a single DrawingGroup, use a TransformGroup.

DrawingGroup les opérations sont appliquées dans l’ordre suivant :DrawingGroup operations are applied in the following order:

  1. OpacityMask

  2. Opacity

  3. BitmapEffect

  4. ClipGeometry

  5. GuidelineSet

  6. Transform

Informations sur les propriétés de dépendanceDependency Property Information

Champ d’identificateurIdentifier field TransformProperty
Propriétés de métadonnées définies sur trueMetadata properties set to true AucunNone

S’applique à