Comment : peindre une zone avec une image
Cet exemple montre comment utiliser la classe ImageBrush pour peindre une zone avec une image. Un ImageBrush affiche une seule image qui est spécifiée par sa propriété ImageSource.
Exemple
L'exemple suivant peint le Background d'un bouton en utilisant un ImageBrush.
Imports System
Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Media.Imaging
Imports System.Windows.Media
Namespace Microsoft.Samples.Graphics.UsingImageBrush
Public Class PaintingWithImagesExample
Inherits Page
Public Sub New()
Background = Brushes.White
Dim mainPanel As New StackPanel()
mainPanel.Margin = New Thickness(20.0)
' Create a button.
Dim berriesButton As New Button()
With berriesButton
.Foreground = Brushes.White
.FontWeight = FontWeights.Bold
Dim sizeConverter As New FontSizeConverter()
.FontSize = CType(sizeConverter.ConvertFromString("16pt"), Double)
.FontFamily = New FontFamily("Verdana")
.Content = "Berries"
.Padding = New Thickness(20.0)
.HorizontalAlignment = HorizontalAlignment.Left
End With
' Create an ImageBrush.
Dim berriesBrush As New ImageBrush()
berriesBrush.ImageSource = New BitmapImage(New Uri("sampleImages\berries.jpg", UriKind.Relative))
' Use the brush to paint the button's background.
berriesButton.Background = berriesBrush
mainPanel.Children.Add(berriesButton)
Me.Content = mainPanel
End Sub
End Class
End Namespace
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media.Imaging;
using System.Windows.Media;
namespace Microsoft.Samples.Graphics.UsingImageBrush
{
public class PaintingWithImagesExample : Page
{
public PaintingWithImagesExample()
{
Background = Brushes.White;
StackPanel mainPanel = new StackPanel();
mainPanel.Margin = new Thickness(20.0);
// Create a button.
Button berriesButton = new Button();
berriesButton.Foreground = Brushes.White;
berriesButton.FontWeight = FontWeights.Bold;
FontSizeConverter sizeConverter = new FontSizeConverter();
berriesButton.FontSize = (Double)sizeConverter.ConvertFromString("16pt");
berriesButton.FontFamily = new FontFamily("Verdana");
berriesButton.Content = "Berries";
berriesButton.Padding = new Thickness(20.0);
berriesButton.HorizontalAlignment = HorizontalAlignment.Left;
// Create an ImageBrush.
ImageBrush berriesBrush = new ImageBrush();
berriesBrush.ImageSource =
new BitmapImage(
new Uri(@"sampleImages\berries.jpg", UriKind.Relative)
);
// Use the brush to paint the button's background.
berriesButton.Background = berriesBrush;
mainPanel.Children.Add(berriesButton);
this.Content = mainPanel;
}
}
}
<!-- This example shows how to use an ImageBrush to paint shapes and controls. -->
<Page
xmlns="https://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="https://schemas.microsoft.com/winfx/2006/xaml"
Background="White">
<StackPanel Margin="20">
<!-- Sets the button's Background property with an
ImageBrush. The resulting
button has an image as its background. -->
<Button
Foreground="White" FontWeight="Bold"
FontSize="16pt" FontFamily="Verdana"
Content="Berries"
Padding="20"
HorizontalAlignment="Left">
<Button.Background>
<ImageBrush ImageSource="sampleImages\berries.jpg" />
</Button.Background>
</Button>
</StackPanel>
</Page>
Par défaut, un ImageBrush étire son image pour remplir complètement la zone que vous peignez. Dans l'exemple précédent, l'image est étirée pour remplir le bouton, en déformant éventuellement l'image. Vous pouvez contrôler ce comportement en affectant à la propriété Stretch de TileBrush la valeur Uniform ou UniformToFill, ce qui permet au pinceau de conserver les proportions de l'image.
Si vous définissez les propriétés Viewport et TileMode d'un ImageBrush, vous pouvez créer un modèle répété. L'exemple suivant peint un bouton en utilisant un modèle créé à partir d'une image.
Imports System
Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Media.Imaging
Imports System.Windows.Media
Namespace Microsoft.Samples.Graphics.UsingImageBrush
Public Class TiledImageBrushExample
Inherits Page
Public Sub New()
Background = Brushes.White
Dim mainPanel As New StackPanel()
mainPanel.Margin = New Thickness(20.0)
' Create a button.
Dim berriesButton As New Button()
With berriesButton
.Foreground = Brushes.White
.FontWeight = FontWeights.Bold
Dim sizeConverter As New FontSizeConverter()
.FontSize = CType(sizeConverter.ConvertFromString("16pt"), Double)
.FontFamily = New FontFamily("Verdana")
.Content = "Berries"
.Padding = New Thickness(20.0)
.HorizontalAlignment = HorizontalAlignment.Left
End With
' Create an ImageBrush.
Dim berriesBrush As New ImageBrush()
berriesBrush.ImageSource = New BitmapImage(New Uri("sampleImages\berries.jpg", UriKind.Relative))
' Set the ImageBrush's Viewport and TileMode
' so that it produces a pattern from
' the image.
berriesBrush.Viewport = New Rect(0, 0, 0.5, 0.5)
berriesBrush.TileMode = TileMode.FlipXY
' Use the brush to paint the button's background.
berriesButton.Background = berriesBrush
mainPanel.Children.Add(berriesButton)
Me.Content = mainPanel
End Sub
End Class
End Namespace
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media.Imaging;
using System.Windows.Media;
namespace Microsoft.Samples.Graphics.UsingImageBrush
{
public class TiledImageBrushExample : Page
{
public TiledImageBrushExample()
{
Background = Brushes.White;
StackPanel mainPanel = new StackPanel();
mainPanel.Margin = new Thickness(20.0);
// Create a button.
Button berriesButton = new Button();
berriesButton.Foreground = Brushes.White;
berriesButton.FontWeight = FontWeights.Bold;
FontSizeConverter sizeConverter = new FontSizeConverter();
berriesButton.FontSize = (Double)sizeConverter.ConvertFromString("16pt");
berriesButton.FontFamily = new FontFamily("Verdana");
berriesButton.Content = "Berries";
berriesButton.Padding = new Thickness(20.0);
berriesButton.HorizontalAlignment = HorizontalAlignment.Left;
// Create an ImageBrush.
ImageBrush berriesBrush = new ImageBrush();
berriesBrush.ImageSource =
new BitmapImage(
new Uri(@"sampleImages\berries.jpg", UriKind.Relative)
);
// Set the ImageBrush's Viewport and TileMode
// so that it produces a pattern from
// the image.
berriesBrush.Viewport = new Rect(0,0,0.5,0.5);
berriesBrush.TileMode = TileMode.FlipXY;
// Use the brush to paint the button's background.
berriesButton.Background = berriesBrush;
mainPanel.Children.Add(berriesButton);
this.Content = mainPanel;
}
}
}
<!-- This example shows how to use an ImageBrush to paint shapes and controls. -->
<Page
xmlns="https://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="https://schemas.microsoft.com/winfx/2006/xaml"
Background="White">
<StackPanel Margin="20">
<!-- Sets the button's Background property with an
ImageBrush. The resulting
button has an image as its background. -->
<Button
Foreground="White" FontWeight="Bold"
FontSize="16pt" FontFamily="Verdana"
Content="Berries"
Padding="20"
HorizontalAlignment="Left">
<Button.Background>
<!-- The ImageBrush's Viewport and TileMode
are set to produce a pattern from the
image. -->
<ImageBrush
Viewport="0,0,0.5,0.5"
TileMode="FlipXY"
ImageSource="sampleImages\berries.jpg" />
</Button.Background>
</Button>
</StackPanel>
</Page>
Pour plus d'informations sur la classe ImageBrush, consultez Peinture avec des objets d'image, de dessin et visuels.
Cet exemple de code fait partie d'un exemple plus complet fourni pour la classe ImageBrush. Pour l'exemple complet, consultez ImageBrush, exemple.