HOW TO：使用主要畫面格建立矩形幾何的動畫
本範例說明如何使用主要畫面格，將 RectangleGeometry 的 Rect 屬性顯示為動畫。
範例
下列範例會使用 RectAnimationUsingKeyFrames 類別將 RectangleGeometry 的 Rect 屬性顯示為動畫。 這個動畫以下列方式使用三個主要畫面格。
在前兩秒，使用 LinearRectKeyFrame 類別的執行個體，將矩形的位置、寬度和高度逐漸變化顯示為動畫。 線性的主要畫面格 (例如 LinearRectKeyFrame) 會在兩個值之間建立平滑的線性轉換。
在後半秒結尾，使用 DiscreteRectKeyFrame 類別的執行個體，突然縮短矩形的高度。 不連續的主要畫面格 (例如 DiscreteRectKeyFrame) 會在值之間建立突然的變化，也就是說，高度會快速縮短而且很明顯。
在最後兩秒，使用 SplineRectKeyFrame 類別的執行個體，將矩形變回原始大小和位置。 曲線主要畫面格 (例如 SplineRectKeyFrame) 會根據 KeySpline 屬性的值建立值之間的可變轉換。 在這個範例中，一開始會緩慢變更，當接近時間區段結尾時會以指數型方式加速。
Imports System
Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Shapes
Imports System.Windows.Media.Animation
Imports System.Windows.Media
Namespace Microsoft.Samples.KeyFrameExamples
''' <summary>
''' This example shows how to use the RectAnimationUsingKeyFrames class to
''' animate the position and size of a rectangle.
''' Key frame animations enable you to create complex animations
''' by specifying multiple destination values
''' and controlling the animation's interpolation method.
''' </summary>
Public Class RectAnimationUsingKeyFramesExample
Inherits Page
Public Sub New()
Title = "RectAnimationUsingKeyFrames Example"
Background = Brushes.White
Margin = New Thickness(20)
' Create a NameScope for this page so that
' Storyboards can be used.
NameScope.SetNameScope(Me, New NameScope())
Dim myStackPanel As New StackPanel()
myStackPanel.Orientation = Orientation.Vertical
myStackPanel.HorizontalAlignment = HorizontalAlignment.Center
'Add the Path Element
Dim myPath As New Path()
myPath.Stroke = Brushes.Black
myPath.Fill = Brushes.LemonChiffon
myPath.StrokeThickness = 1
' Create a RectangleGeometry to specify the Path data.
Dim myRectangleGeometry As New RectangleGeometry()
myRectangleGeometry.Rect = New Rect(0, 200, 100, 100)
myPath.Data = myRectangleGeometry
myStackPanel.Children.Add(myPath)
' Assign the TranslateTransform a name so that
' it can be targeted by a Storyboard.
Me.RegisterName("AnimatedRectangleGeometry", myRectangleGeometry)
' Create a RectAnimationUsingKeyFrames to
' animate the RectangleGeometry.
Dim rectAnimation As New RectAnimationUsingKeyFrames()
rectAnimation.Duration = TimeSpan.FromSeconds(6)
' Set the animation to repeat forever.
rectAnimation.RepeatBehavior = RepeatBehavior.Forever
' Animate position, width, and height in first 2 seconds. LinearRectKeyFrame creates
' a smooth, linear animation between values.
rectAnimation.KeyFrames.Add(New LinearRectKeyFrame(New Rect(600,50,200,50), KeyTime.FromTimeSpan(TimeSpan.FromSeconds(2)))) ' KeyTime - Target value (KeyValue)
' In the next half second, change height to 10. DiscreteRectKeyFrame creates a
' sudden "jump" between values.
rectAnimation.KeyFrames.Add(New DiscreteRectKeyFrame(New Rect(600, 50, 200, 10), KeyTime.FromTimeSpan(TimeSpan.FromSeconds(2.5)))) ' KeyTime - Target value (KeyValue)
' In the final 2 seconds of the animation, go back to the starting position, width, and height.
' Spline key frames like SplineRectKeyFrame creates a variable transition between values depending
' on the KeySpline property. In this example, the animation starts off slow but toward the end of
' the time segment, it speeds up exponentially.
rectAnimation.KeyFrames.Add(New SplineRectKeyFrame(New Rect(0, 200, 100, 100), KeyTime.FromTimeSpan(TimeSpan.FromSeconds(4.5)), New KeySpline(0.6, 0.0, 0.9, 0.0))) ' KeySpline - KeyTime - Target value (KeyValue)
' Set the animation to target the Rect property
' of the object named "AnimatedRectangleGeometry."
Storyboard.SetTargetName(rectAnimation, "AnimatedRectangleGeometry")
Storyboard.SetTargetProperty(rectAnimation, New PropertyPath(RectangleGeometry.RectProperty))
' Create a storyboard to apply the animation.
Dim rectStoryboard As New Storyboard()
rectStoryboard.Children.Add(rectAnimation)
' Start the storyboard after the rectangle loads.
AddHandler myPath.Loaded, Sub(sender As Object, e As RoutedEventArgs) rectStoryboard.Begin(Me)
Content = myStackPanel
End Sub
End Class
End Namespace
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Shapes;
using System.Windows.Media.Animation;
using System.Windows.Media;
namespace Microsoft.Samples.KeyFrameExamples
{
/// <summary>
/// This example shows how to use the RectAnimationUsingKeyFrames class to
/// animate the position and size of a rectangle.
/// Key frame animations enable you to create complex animations
/// by specifying multiple destination values
/// and controlling the animation's interpolation method.
/// </summary>
public class RectAnimationUsingKeyFramesExample : Page
{
public RectAnimationUsingKeyFramesExample()
{
Title = "RectAnimationUsingKeyFrames Example";
Background = Brushes.White;
Margin = new Thickness(20);
// Create a NameScope for this page so that
// Storyboards can be used.
NameScope.SetNameScope(this, new NameScope());
StackPanel myStackPanel = new StackPanel();
myStackPanel.Orientation = Orientation.Vertical;
myStackPanel.HorizontalAlignment = HorizontalAlignment.Center;
//Add the Path Element
Path myPath = new Path();
myPath.Stroke = Brushes.Black;
myPath.Fill = Brushes.LemonChiffon;
myPath.StrokeThickness = 1;
// Create a RectangleGeometry to specify the Path data.
RectangleGeometry myRectangleGeometry = new RectangleGeometry();
myRectangleGeometry.Rect = new Rect(0, 200, 100, 100);
myPath.Data = myRectangleGeometry;
myStackPanel.Children.Add(myPath);
// Assign the TranslateTransform a name so that
// it can be targeted by a Storyboard.
this.RegisterName(
"AnimatedRectangleGeometry", myRectangleGeometry);
// Create a RectAnimationUsingKeyFrames to
// animate the RectangleGeometry.
RectAnimationUsingKeyFrames rectAnimation
= new RectAnimationUsingKeyFrames();
rectAnimation.Duration = TimeSpan.FromSeconds(6);
// Set the animation to repeat forever.
rectAnimation.RepeatBehavior = RepeatBehavior.Forever;
// Animate position, width, and height in first 2 seconds. LinearRectKeyFrame creates
// a smooth, linear animation between values.
rectAnimation.KeyFrames.Add(
new LinearRectKeyFrame(
new Rect(600,50,200,50), // Target value (KeyValue)
KeyTime.FromTimeSpan(TimeSpan.FromSeconds(2))) // KeyTime
);
// In the next half second, change height to 10. DiscreteRectKeyFrame creates a
// sudden "jump" between values.
rectAnimation.KeyFrames.Add(
new DiscreteRectKeyFrame(
new Rect(600, 50, 200, 10), // Target value (KeyValue)
KeyTime.FromTimeSpan(TimeSpan.FromSeconds(2.5))) // KeyTime
);
// In the final 2 seconds of the animation, go back to the starting position, width, and height.
// Spline key frames like SplineRectKeyFrame creates a variable transition between values depending
// on the KeySpline property. In this example, the animation starts off slow but toward the end of
// the time segment, it speeds up exponentially.
rectAnimation.KeyFrames.Add(
new SplineRectKeyFrame(
new Rect(0, 200, 100, 100), // Target value (KeyValue)
KeyTime.FromTimeSpan(TimeSpan.FromSeconds(4.5)), // KeyTime
new KeySpline(0.6, 0.0, 0.9, 0.0) // KeySpline
)
);
// Set the animation to target the Rect property
// of the object named "AnimatedRectangleGeometry."
Storyboard.SetTargetName(rectAnimation, "AnimatedRectangleGeometry");
Storyboard.SetTargetProperty(
rectAnimation, new PropertyPath(RectangleGeometry.RectProperty));
// Create a storyboard to apply the animation.
Storyboard rectStoryboard = new Storyboard();
rectStoryboard.Children.Add(rectAnimation);
// Start the storyboard after the rectangle loads.
myPath.Loaded += delegate(object sender, RoutedEventArgs e)
{
rectStoryboard.Begin(this);
};
Content = myStackPanel;
}
}
}
<Page
xmlns="https://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="https://schemas.microsoft.com/winfx/2006/xaml"
Title="ThicknessAnimationUsingKeyFrames Example">
<StackPanel Orientation="Vertical" HorizontalAlignment="Center">
<Path Stroke="Black" StrokeThickness="1" Fill="LemonChiffon">
<Path.Data>
<RectangleGeometry x:Name="myRectangleGeometry" Rect="0,200,100,100" />
</Path.Data>
<Path.Triggers>
<EventTrigger RoutedEvent="Path.Loaded">
<BeginStoryboard>
<Storyboard>
<!-- Animate the Rect property of the RectangleGeometry which causes the
rectangle to animate its position as well as its width and height. -->
<RectAnimationUsingKeyFrames
Storyboard.TargetName="myRectangleGeometry"
Storyboard.TargetProperty ="Rect"
Duration="0:0:6" FillBehavior="HoldEnd" RepeatBehavior="Forever">
<!-- Animate position, width, and height in first 2 seconds. LinearRectKeyFrame creates
a smooth, linear animation between values. -->
<LinearRectKeyFrame Value="600,50,200,50" KeyTime="0:0:2" />
<!-- In the next half second, change height to 10. DiscreteRectKeyFrame creates a
sudden "jump" between values. -->
<DiscreteRectKeyFrame Value="600,50,200,10" KeyTime="0:0:2.5" />
<!-- In the final 2 seconds of the animation, go back to the starting position, width, and height.
Spline key frames like SplineRectKeyFrame creates a variable transition between values depending
on the KeySpline property. In this example, the animation starts off slow but toward the end of
the time segment, it speeds up exponentially.-->
<SplineRectKeyFrame Value="0,200,100,100" KeyTime="0:0:4.5" KeySpline="0.6,0.0 0.9,0.00" />
</RectAnimationUsingKeyFrames>
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</Path.Triggers>
</Path>
</StackPanel>
</Page>
如需完整範例，請參閱 KeyFrame 動畫範例 (英文)。