WPF 为边框背景色添加动画效果

Question

我正在尝试为从Border继承的自定义类的背景设置画笔颜色的动画。我在这里尝试了MSDN链接：

http://msdn.microsoft.com/en-us/library/system.windows.media.animation.coloranimation.aspx

这不是我想要的，但可以让我达到一个没有错误的点，但仍然没有什么是动画。该示例的问题在于，它们在不是矩形的类中定义逻辑。我正在尝试从矩形（实际上是边框）内定义。

下面是我试图从 MSDN 推断出我的情况的代码。

public class PrettyButton : System.Windows.Controls.Border
{
    private System.Windows.Media.SolidColorBrush hoverColor = new System.Windows.Media.SolidColorBrush();
    private System.Windows.Media.SolidColorBrush origColor = new System.Windows.Media.SolidColorBrush();
    private System.Windows.Media.Animation.Storyboard story = new System.Windows.Media.Animation.Storyboard();
    public PrettyButton()
    {
        hoverColor.Color = System.Windows.Media.Color.FromArgb(255, 50, 200, 0);
        origColor.Color = System.Windows.Media.Color.FromArgb(0, 0, 0, 0);
        this.MouseEnter += PrettyButton_MouseEnter;
        this.MouseLeave += PrettyButton_MouseLeave;
        //Animate in logic
        System.Windows.Media.Animation.ColorAnimation color = new System.Windows.Media.Animation.ColorAnimation(hoverColor.Color, System.TimeSpan.FromMilliseconds(400));
        System.Windows.Media.Animation.Storyboard.SetTargetProperty(color, new System.Windows.PropertyPath(System.Windows.Media.SolidColorBrush.ColorProperty));
        story.Children.Add(color);            
    }

和下面的鼠标事件我有

void PrettyButton_MouseEnter(object sender, System.Windows.Input.MouseEventArgs e)
    {
        story.Begin(this);            
    }

不幸的是，我没有再收到任何错误，所以这条小径对我来说已经变冷了。我也确信我可能会在 XAML 中找到 10 个解决方案，但我希望这个类将来是可重用的，重新定义这个逻辑并不理想。

Answer 1

而不是System.Windows.Media.SolidColorBrush.ColorProperty，尝试设置"(Border.Background).(SolidColorBrush.Color)"属性路径。

System.Windows.Media.Animation.Storyboard.SetTargetProperty(color, new System.Windows.PropertyPath("(Border.Background).(SolidColorBrush.Color)"));

还将Background设置为constructor PrettyButton 如下所示：

public PrettyButton()
{
    .....
    origColor.Color = System.Windows.Media.Color.FromArgb(0, 0, 0, 0);
    this.Background= new SolidColorBrush(origColor.Color);
    ..
    ....
}

更新：

public class PrettyButton : System.Windows.Controls.Border
{
    private System.Windows.Media.SolidColorBrush hoverColor = new System.Windows.Media.SolidColorBrush();
    private System.Windows.Media.SolidColorBrush origColor = new System.Windows.Media.SolidColorBrush();

    public PrettyButton()
    {
        hoverColor.Color = System.Windows.Media.Color.FromArgb(255, 50, 200, 0);
        origColor.Color = System.Windows.Media.Color.FromArgb(0, 0, 0, 0);
        this.Background= new SolidColorBrush(origColor.Color);
        this.MouseEnter += PrettyButton_MouseEnter;
        this.MouseLeave += PrettyButton_MouseLeave;
    }
    private void PrettyButton_MouseLeave(object sender, MouseEventArgs e)
    {
        System.Windows.Media.Animation.Storyboard story = new System.Windows.Media.Animation.Storyboard();
        System.Windows.Media.Animation.ColorAnimation color = new System.Windows.Media.Animation.ColorAnimation(origColor.Color, System.TimeSpan.FromMilliseconds(400));
        System.Windows.Media.Animation.Storyboard.SetTargetProperty(color, new System.Windows.PropertyPath("(Border.Background).(SolidColorBrush.Color)"));
        story.Children.Add(color);
        story.Begin(this);
    }
    private void PrettyButton_MouseEnter(object sender, MouseEventArgs e)
    {
        System.Windows.Media.Animation.Storyboard story = new System.Windows.Media.Animation.Storyboard();
        System.Windows.Media.Animation.ColorAnimation color = new System.Windows.Media.Animation.ColorAnimation(hoverColor.Color, System.TimeSpan.FromMilliseconds(400));
        System.Windows.Media.Animation.Storyboard.SetTargetProperty(color, new System.Windows.PropertyPath("(Border.Background).(SolidColorBrush.Color)"));
        story.Children.Add(color);
        story.Begin(this);
    }
}