我的任务是创建此页面上按钮图形样式的等效 Flex 4 实现:http: //h.dwighthouse.com/temp/UDOP/2011-3-25_themeDevGlowing/
即,按钮上的动画发光效果。我已经得到了我认为合适的基于程序渐变的皮肤基础,但我有两个问题。
一,我无法让任何鼠标事件在皮肤中做出响应。我似乎找不到其他有这个问题的人。在下面的代码中,当鼠标悬停时,startAnimation 永远不会被调用,但显然该事件已被注册。要测试此代码,只需skinClass="ButtonSkin"
在主应用程序中添加一个按钮声明,下面的代码是 ButtonSkin.mxml 文件。
<?xml version="1.0" encoding="utf-8"?>
<s:Skin xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx"
initialize="init()"
mouseEnabled="true">
<fx:Metadata>
[HostComponent("spark.components.Button")]
</fx:Metadata>
<fx:Script>
<![CDATA[
import flash.events.Event;
[Bindable]
private var animatedAlpha:Number = 0.8;
private var animationDirection:Number = -1;
private function backAndForth(value:Number, max:Number, min:Number, increment:Number):Number {
value += (animationDirection * increment);
if (value < min || value > max)
{
animationDirection *= -1;
value += (animationDirection * increment * 2);
}
return value;
}
private function startAnimation(e:MouseEvent):void {
animatedAlpha = backAndForth(animatedAlpha, 0.8, 0.3, 0.1); // Or something
systemManager.addEventListener(MouseEvent.MOUSE_OUT, endAnimation);
}
private function endAnimation(e:MouseEvent):void {
animatedAlpha = backAndForth(animatedAlpha, 0.8, 0.3, 0.1); // Or something
systemManager.removeEventListener(MouseEvent.MOUSE_OUT, endAnimation);
}
private function init():void {
parent.mouseChildren = true; // Otherwise mouse events don't fire in the skin
clickableArea.addEventListener(MouseEvent.MOUSE_OVER, startAnimation);
}
]]>
</fx:Script>
<s:states>
<s:State name="up" />
<s:State name="over" />
<s:State name="down" />
<s:State name="disabled" />
</s:states>
<s:Group top="0" bottom="0" left="0" right="0" id="clickableArea">
<s:Rect top="0" bottom="0" left="0" right="0" radiusX="8" radiusY="8">
<s:fill>
<s:LinearGradient rotation="90">
<s:GradientEntry color="#000000" color.down="#bb0000" color.disabled="#3b3b3b" ratio="0" />
<s:GradientEntry color="#353535" color.down="#ff0000" color.disabled="#555555" ratio="1" />
</s:LinearGradient>
</s:fill>
</s:Rect>
<s:Rect top="0" bottom="0" left="0" right="0" radiusX="8" radiusY="8">
<s:fill>
<s:LinearGradient rotation="90">
<s:GradientEntry color.over="#8f1b1b" alpha="0" ratio="0" />
<s:GradientEntry color.over="#8f1b1b" alpha="0" ratio="0.4" />
<s:GradientEntry color.over="#8f1b1b" alpha="{animatedAlpha}" alpha.down="0" ratio="1" />
</s:LinearGradient>
</s:fill>
</s:Rect>
<s:Rect top="0" bottom="0" left="0" right="0" radiusX="8" radiusY="8">
<s:stroke>
<s:SolidColorStroke color="#000000" color.disabled="#333333" weight="1" />
</s:stroke>
<s:fill>
<s:LinearGradient rotation="90">
<s:GradientEntry color="#ffffff" color.disabled="#9e9e9e" alpha="0.6" alpha.down="0.7" ratio="0" />
<s:GradientEntry color="#ffffff" color.disabled="#848484" alpha="0.2" alpha.down="0.4" ratio="0.45" />
<s:GradientEntry color="#ffffff" alpha="0" ratio="0.46" />
</s:LinearGradient>
</s:fill>
</s:Rect>
<s:Label id="labelDisplay" color="#ffffff" color.disabled="#aaaaaa" textAlign="center" baseline="center" paddingTop="7" paddingBottom="5" paddingLeft="10" paddingRight="10">
<s:filters>
<s:DropShadowFilter distance="0" angle="45" blurX="5" blurY="5" />
</s:filters>
</s:Label>
</s:Group>
编辑我发现了为什么鼠标事件没有触发。默认情况下,该按钮显然具有 mouseChildren false,这专门防止事件触发低于自身。parent.mouseChildren = true;
在构造函数中使用可以解决此问题。进入问题的下一部分:连续动画。
除此之外,我会很感激一些帮助或指出我在每帧调用一个函数的正确方向,以及使用鼠标事件打开和关闭所述增量调用的能力。(如果这不是您在 Flex 中制作动画的方式,请原谅我,我对基于 Flash 的动画一无所知。)谢谢!