向数据绑定属性添加逻辑以在 WPF 中启动动画
我觉得这是一个非常简单的问题，但我在互联网上找不到任何想要做这样的事情的人的例子。我现在拥有的是我在 WPF 中制作的半圆仪表控件。我有一个 RotateTransform，它的角度绑定了数据，因此当数据进入时，它会直观地显示角度。问题是有些值是 +90 度，而且仪表的外观也很难看到指针超过 80 度点。现在我有一个故事板，有 3 个框架，针在 70 度和 73 度之间“摆动”。
我一直在试图找出某种方法来为所有这些添加逻辑，以便在 +/- 70 度值时动画将循环播放，使仪表呈现出“触底”的外观。我找到了大量有关触发器之类的信息，但我找不到任何想要添加逻辑来生成动画的示例。我觉得我需要某种回调之类的东西。起初我认为数据转换器是理想的选择，但随着我对这些选项的研究越多，我认为它们行不通。
编辑： 我正在寻找类似的东西...
if (angle > 70)
object.BeginAnimation(WobbleRight)
else if (angle < -70)
object.BeginAnimation(WobbleLeft)
else
object.Angle = angle
但是每次角度更新时都需要检查这一点。这只是回调的工作吗？
I feel like this is a very simple question, but I can't really find any examples on the internet of anyone who wants to do something like this. What I have right now is a half circle gauge control that I made in WPF. I have a RotateTransform that has data bound to its angle so as the data comes in it shows the angle visually. The problem is some of the values are +90 degrees and the way the gauge looks as well it gets harder to see the needle past about the 80 degree point. Right now I have a storyboard that has 3 frames with the needle "wobbling" between like 70 and 73 degrees.
What I have been trying to figure out is some way to add logic to all of this so that at values of +/- 70 degree values the animation will loop giving the gauge a "bottoming out" look to it. Ive found plenty of info on triggers and whatnot but I can't find any examples of people wanting to add logic to produce animations. I feel like I need some sort of callback or something. At first I was thinking a data converter would be the ideal choice but the more I look into these options I think they won't work.
EDIT:
I'm lookin for something like...
if (angle > 70)
object.BeginAnimation(WobbleRight)
else if (angle < -70)
object.BeginAnimation(WobbleLeft)
else
object.Angle = angle
However it would need to check this every time Angle gets updated. Would this just be the job for a callback?
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没关系，我在某种程度上弄清楚了如何做到这一点。刚刚创建了一个自定义依赖属性并为其提供了回调。从那里您可以在每次值更新时执行一些操作。这就是我认为需要的。
Nevermind I figured out how to do it to a degree. Just created a custom dependency property and had a callback for it. From there you can do stuff every time the value updates. This is sorta what I was thinking was needed.