以编程方式创建缓动函数C#

时间:2011-08-08 20:51:16

标签: c# wpf animation storyboard easing-functions

我正在学习如何使用C#创建动画。因此,如果我为对象的边缘设置动画,那么我将使用以下方法为其边距设置动画:

test(someObject, FrameworkElement.MarginProperty);

/// <summary>
/// animate margin of an object
/// </summary>
/// <param name="target">what object do you whant to animate?</param>
/// <param name="property">what property do you want to animate</param>
public void test(DependencyObject target, DependencyProperty property)
{
    ThicknessAnimation animation = new ThicknessAnimation();
    animation.To = new Thickness(0,0,0,0);   // final value

    //animation.From = new Thickness(50,50,50,50);

    //make animation last 5 seconds
    animation.BeginTime = TimeSpan.FromSeconds(0);
    animation.Duration = TimeSpan.FromSeconds(5);

    // set the ease function
    BounceEase b = new BounceEase();
    animation.EasingFunction = b;

    //note that I would like to add an easeIn function

    //start animating
    Storyboard.SetTarget(animation, target);  // what object will be animated?
    Storyboard.SetTargetProperty(animation, new PropertyPath(property)); // what property will be animated
    Storyboard sb = new Storyboard();
    sb.Children.Add(animation);
    sb.Begin();
}

请注意,我可以创建一个缓动功能。但是如果我想创建一个EaseInOut缓动函数呢?为了使用EaseInOut方法为对象设置动画,我需要添加到我的测试方法中。

1 个答案:

答案 0 :(得分:4)

我想我终于让我的方法工作,以便为对象的边缘设置动画。

MyStoryboards.Animations a = new MyStoryboards.Animations();

// set the ease function
BounceEase b = new BounceEase();
b.Bounces = 5;
b.Bounciness = 1;
b.EasingMode = EasingMode.EaseIn;

a.animThickness(tv, FrameworkElement.MarginProperty, tv.Margin, new Thickness(), TimeSpan.FromSeconds(0), TimeSpan.FromSeconds(5), b);

...

...

public void animThickness(DependencyObject target, DependencyProperty property, Thickness from, Thickness to, TimeSpan beginTime, TimeSpan duration , IEasingFunction e)
{
    ThicknessAnimation animation = new ThicknessAnimation();
    animation.To = to;   // final value

    animation.From = from;

    animation.BeginTime = beginTime;
    animation.Duration = duration;

    animation.EasingFunction = e;

    //start animating
    Storyboard.SetTarget(animation, target);  // what object will be animated?
    Storyboard.SetTargetProperty(animation, new PropertyPath(property)); // what property will be animated
    Storyboard sb = new Storyboard();
    sb.Children.Add(animation);
    sb.Begin();
}