EasingFunctionBase 类
定义
重要
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为所有缓动函数提供基类。
public ref class EasingFunctionBase abstract : System::Windows::Freezable, System::Windows::Media::Animation::IEasingFunctionpublic abstract class EasingFunctionBase : System.Windows.Freezable, System.Windows.Media.Animation.IEasingFunctiontype EasingFunctionBase = class
inherit Freezable
interface IEasingFunctionPublic MustInherit Class EasingFunctionBase
Inherits Freezable
Implements IEasingFunction- 继承
- 派生
- 实现
示例
以下示例演示如何创建简单的自定义缓动函数。 可以通过重写 EaseInCore 方法来为缓动函数的行为方式添加自己的数学逻辑。
namespace CustomEasingFunction
{
public class CustomSeventhPowerEasingFunction : EasingFunctionBase
{
public CustomSeventhPowerEasingFunction()
: base()
{
}
// Specify your own logic for the easing function by overriding
// the EaseInCore method. Note that this logic applies to the "EaseIn"
// mode of interpolation.
protected override double EaseInCore(double normalizedTime)
{
// applies the formula of time to the seventh power.
return Math.Pow(normalizedTime, 7);
}
// Typical implementation of CreateInstanceCore
protected override Freezable CreateInstanceCore()
{
return new CustomSeventhPowerEasingFunction();
}
}
}
Namespace CustomEasingFunction
Public Class CustomSeventhPowerEasingFunction
Inherits EasingFunctionBase
Public Sub New()
MyBase.New()
End Sub
' Specify your own logic for the easing function by overriding
' the EaseInCore method. Note that this logic applies to the "EaseIn"
' mode of interpolation.
Protected Overrides Function EaseInCore(ByVal normalizedTime As Double) As Double
' applies the formula of time to the seventh power.
Return Math.Pow(normalizedTime, 7)
End Function
' Typical implementation of CreateInstanceCore
Protected Overrides Function CreateInstanceCore() As Freezable
Return New CustomSeventhPowerEasingFunction()
End Function
End Class
End Namespace
<Window x:Class="CustomEasingFunction.Window1"
xmlns:CustomEase="clr-namespace:CustomEasingFunction"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Window1" Height="500" Width="300">
<StackPanel>
<TextBlock Margin="10" TextWrapping="Wrap">Click on the rectangle to start the animation</TextBlock>
<StackPanel x:Name="LayoutRoot" Background="White">
<Rectangle Name="myRectangle" Width="200" Height="30" Fill="Blue">
<Rectangle.Triggers>
<EventTrigger RoutedEvent="Rectangle.MouseDown">
<BeginStoryboard>
<Storyboard>
<DoubleAnimation From="30" To="300" Duration="00:00:3"
Storyboard.TargetName="myRectangle"
Storyboard.TargetProperty="Height">
<DoubleAnimation.EasingFunction>
<!-- You get the EasingMode property for free on your custom
easing function.-->
<CustomEase:CustomSeventhPowerEasingFunction EasingMode="EaseIn"/>
</DoubleAnimation.EasingFunction>
</DoubleAnimation>
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</Rectangle.Triggers>
</Rectangle>
</StackPanel>
</StackPanel>
</Window>
注解
可以通过从此类继承来创建自己的自定义缓动函数。
构造函数
| EasingFunctionBase() |
初始化 EasingFunctionBase 类的新实例。 |
字段
| EasingModeProperty |
标识 EasingMode 依赖项属性。 |
属性
| CanFreeze |
获取一个值，该值指示是否可将对象变为不可修改。 (继承自 Freezable) |
| DependencyObjectType |
DependencyObjectType获取包装此实例的 CLR 类型的 。 (继承自 DependencyObject) |
| Dispatcher |
获取与此 Dispatcher 关联的 DispatcherObject。 (继承自 DispatcherObject) |
| EasingMode |
获取或设置用于指定动画内插方式的值。 |
| IsFrozen |
获取一个值，该值指示对象当前是否可修改。 (继承自 Freezable) |
| IsSealed |
获取一个值，该值指示此实例当前是否为密封的（只读）。 (继承自 DependencyObject) |
方法
事件
| Changed |
在修改 Freezable 或其包含的对象时发生。 (继承自 Freezable) |
