HOW TO：建立 SolidColorBrush 色彩或不透明效果的動畫
更新：2007 年 11 月
本範例顯示如何建立 SolidColorBrush 的 Color 和 Opacity 的動畫。
範例
下列範例使用三個動畫來建立 SolidColorBrush 的 Color 和 Opacity 的動畫。
第一個動畫 ColorAnimation 會在滑鼠進入矩形時變更筆刷的色彩為 Gray。
下一個動畫是另一個 ColorAnimation，會在滑鼠離開矩形時變更筆刷的色彩為 Orange。
最後一個動畫 DoubleAnimation，會在按下滑鼠左鍵時變更筆刷的不透明度為 0.0。
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Windows.Input;
namespace Microsoft.Samples.Animation
{
/// <summary>
/// This example shows how to animate the Opacity and Color
/// properties of a SolidColorBrush.
/// </summary>
public class SolidColorBrushExample : Page
{
public SolidColorBrushExample()
{
Title = "SolidColorBrush Animation Example";
Background = Brushes.White;
// Create a NameScope for the page so
// that Storyboards can be used.
NameScope.SetNameScope(this, new NameScope());
// Create a Rectangle.
Rectangle aRectangle = new Rectangle();
aRectangle.Width = 100;
aRectangle.Height = 100;
// Create a SolidColorBrush to paint
// the rectangle's fill. The Opacity
// and Color properties of the brush
// will be animated.
SolidColorBrush myAnimatedBrush = new SolidColorBrush();
myAnimatedBrush.Color = Colors.Orange;
aRectangle.Fill = myAnimatedBrush;
// Register the brush's name with the page
// so that it can be targeted by storyboards.
this.RegisterName("MyAnimatedBrush", myAnimatedBrush);
//
// Animate the brush's color to gray when
// the mouse enters the rectangle.
//
ColorAnimation mouseEnterColorAnimation = new ColorAnimation();
mouseEnterColorAnimation.To = Colors.Gray;
mouseEnterColorAnimation.Duration = TimeSpan.FromSeconds(1);
Storyboard.SetTargetName(mouseEnterColorAnimation, "MyAnimatedBrush");
Storyboard.SetTargetProperty(
mouseEnterColorAnimation, new PropertyPath(SolidColorBrush.ColorProperty));
Storyboard mouseEnterStoryboard = new Storyboard();
mouseEnterStoryboard.Children.Add(mouseEnterColorAnimation);
aRectangle.MouseEnter += delegate(object sender, MouseEventArgs e)
{
mouseEnterStoryboard.Begin(this);
};
//
// Animate the brush's color to orange when
// the mouse leaves the rectangle.
//
ColorAnimation mouseLeaveColorAnimation = new ColorAnimation();
mouseLeaveColorAnimation.To = Colors.Orange;
mouseLeaveColorAnimation.Duration = TimeSpan.FromSeconds(1);
Storyboard.SetTargetName(mouseLeaveColorAnimation, "MyAnimatedBrush");
Storyboard.SetTargetProperty(
mouseLeaveColorAnimation, new PropertyPath(SolidColorBrush.ColorProperty));
Storyboard mouseLeaveStoryboard = new Storyboard();
mouseLeaveStoryboard.Children.Add(mouseLeaveColorAnimation);
aRectangle.MouseLeave += delegate(object sender, MouseEventArgs e)
{
mouseLeaveStoryboard.Begin(this);
};
//
// Animate the brush's opacity to 0 and back when
// the left mouse button is pressed over the rectangle.
//
DoubleAnimation opacityAnimation = new DoubleAnimation();
opacityAnimation.To = 0.0;
opacityAnimation.Duration = TimeSpan.FromSeconds(0.5);
opacityAnimation.AutoReverse = true;
Storyboard.SetTargetName(opacityAnimation, "MyAnimatedBrush");
Storyboard.SetTargetProperty(
opacityAnimation, new PropertyPath(SolidColorBrush.OpacityProperty));
Storyboard mouseLeftButtonDownStoryboard = new Storyboard();
mouseLeftButtonDownStoryboard.Children.Add(opacityAnimation);
aRectangle.MouseLeftButtonDown += delegate(object sender, MouseButtonEventArgs e)
{
mouseLeftButtonDownStoryboard.Begin(this);
};
StackPanel mainPanel = new StackPanel();
mainPanel.Margin = new Thickness(20);
mainPanel.Children.Add(aRectangle);
Content = mainPanel;
}
}
}
<!-- SolidColorBrushExample.xaml
This example shows how to animate the Opacity and Color
properties of a SolidColorBrush.-->
<Page
xmlns="https://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="https://schemas.microsoft.com/winfx/2006/xaml"
Title="SolidColorBrush Animation Example"
Background="White">
<StackPanel Margin="20">
<!-- The Opacity and Color of the SolidColorBrush
used to fill this rectangle is animated. -->
<Rectangle Width="100" Height="100">
<Rectangle.Fill>
<SolidColorBrush x:Name="MyAnimatedBrush" Color="Orange" />
</Rectangle.Fill>
<Rectangle.Triggers>
<!-- Animates the brush's color to gray
When the mouse enters the rectangle. -->
<EventTrigger RoutedEvent="Rectangle.MouseEnter">
<BeginStoryboard>
<Storyboard>
<ColorAnimation
Storyboard.TargetName="MyAnimatedBrush"
Storyboard.TargetProperty="Color"
To="Gray" Duration="0:0:1" />
</Storyboard>
</BeginStoryboard>
</EventTrigger>
<!-- Animates the brush's color to orange
when the mouse leaves the rectangle. -->
<EventTrigger RoutedEvent="Rectangle.MouseLeave">
<BeginStoryboard>
<Storyboard>
<ColorAnimation
Storyboard.TargetName="MyAnimatedBrush"
Storyboard.TargetProperty="Color"
To="Orange" Duration="0:0:1" />
</Storyboard>
</BeginStoryboard>
</EventTrigger>
<!-- Animates the brush's opacity when the
left mouse button is pressed over the rectangle. -->
<EventTrigger RoutedEvent="Rectangle.MouseLeftButtonDown">
<BeginStoryboard>
<Storyboard>
<DoubleAnimation
Storyboard.TargetName="MyAnimatedBrush"
Storyboard.TargetProperty="Opacity"
To="0.0" Duration="0:0:0.5" AutoReverse="True" />
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</Rectangle.Triggers>
</Rectangle>
</StackPanel>
</Page>
關於顯示如何建立各種類型筆刷的動畫，如需更為完整的範例，請參閱筆刷範例。如需動畫的詳細資訊，請參閱動畫概觀。
為了保持與其他動畫範例的一致性，這個範例的程式碼版本是使用 Storyboard 物件來套用其動畫。不過，在程式碼中套用單一動畫時，使用 BeginAnimation 方法會比使用 Storyboard 更簡單。如需範例，請參閱 HOW TO：不使用腳本而建立屬性的動畫。