How to: Animate the Color or Opacity of a SolidColorBrush
This example shows how to animate the Color and Opacity of a SolidColorBrush.
Example
The following example uses three animations to animate the Color and Opacity of a SolidColorBrush.
The first animation, a ColorAnimation, changes the brush's color to Gray when the mouse enters the rectangle.
The next animation, another ColorAnimation, changes the brush's color to Orange when the mouse leaves the rectangle.
The final animation, a DoubleAnimation, changes the brush's opacity to 0.0 when the left mouse button is pressed.
Imports Microsoft.VisualBasic
Imports System
Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Media
Imports System.Windows.Media.Animation
Imports System.Windows.Shapes
Imports 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
Inherits Page
Public Sub New()
Title = "SolidColorBrush Animation Example"
Background = Brushes.White
' Create a NameScope for the page so
' that Storyboards can be used.
NameScope.SetNameScope(Me, New NameScope())
' Create a Rectangle.
Dim aRectangle As 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.
Dim myAnimatedBrush As 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.
Me.RegisterName("MyAnimatedBrush", myAnimatedBrush)
'
' Animate the brush's color to gray when
' the mouse enters the rectangle.
'
Dim mouseEnterColorAnimation As New ColorAnimation()
mouseEnterColorAnimation.To = Colors.Gray
mouseEnterColorAnimation.Duration = TimeSpan.FromSeconds(1)
Storyboard.SetTargetName(mouseEnterColorAnimation, "MyAnimatedBrush")
Storyboard.SetTargetProperty(mouseEnterColorAnimation, New PropertyPath(SolidColorBrush.ColorProperty))
Dim mouseEnterStoryboard As New Storyboard()
mouseEnterStoryboard.Children.Add(mouseEnterColorAnimation)
AddHandler aRectangle.MouseEnter, Sub(sender As Object, e As MouseEventArgs) mouseEnterStoryboard.Begin(Me)
'
' Animate the brush's color to orange when
' the mouse leaves the rectangle.
'
Dim mouseLeaveColorAnimation As New ColorAnimation()
mouseLeaveColorAnimation.To = Colors.Orange
mouseLeaveColorAnimation.Duration = TimeSpan.FromSeconds(1)
Storyboard.SetTargetName(mouseLeaveColorAnimation, "MyAnimatedBrush")
Storyboard.SetTargetProperty(mouseLeaveColorAnimation, New PropertyPath(SolidColorBrush.ColorProperty))
Dim mouseLeaveStoryboard As New Storyboard()
mouseLeaveStoryboard.Children.Add(mouseLeaveColorAnimation)
AddHandler aRectangle.MouseLeave, Sub(sender As Object, e As MouseEventArgs) mouseLeaveStoryboard.Begin(Me)
'
' Animate the brush's opacity to 0 and back when
' the left mouse button is pressed over the rectangle.
'
Dim opacityAnimation As 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))
Dim mouseLeftButtonDownStoryboard As New Storyboard()
mouseLeftButtonDownStoryboard.Children.Add(opacityAnimation)
AddHandler aRectangle.MouseLeftButtonDown, Sub(sender As Object, e As MouseButtonEventArgs) mouseLeftButtonDownStoryboard.Begin(Me)
Dim mainPanel As New StackPanel()
mainPanel.Margin = New Thickness(20)
mainPanel.Children.Add(aRectangle)
Content = mainPanel
End Sub
End Class
End Namespace
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>
For a more complete sample, which shows how to animate different types of brushes, see the Brushes Sample. For more information about animation, see the Animation Overview.
For consistency with other animation examples, the code versions of this example use a Storyboard object to apply their animations. However, when applying a single animation in code, it's simpler to use the BeginAnimation method instead of using a Storyboard. For an example, see How to: Animate a Property Without Using a Storyboard.