将gif图像插入自定义flex进度条

Question

我通过扩展flex的progressBar创建了一个自定义的progress Bar。我想使用flex的图像在自定义进度栏中插入一张gif图像，但什么也没发生。

我需要实现任何flex接口吗？请提供建议。

谢谢

package com
{
    import mx.controls.Image;
    import mx.controls.Label;
    import mx.controls.ProgressBar;
    import mx.core.mx_internal;
    use namespace mx_internal;

    public class CustomProgressBar extends ProgressBar
    {
        [Embed("resource/images/running_animated_gif.gif")]
        [Bindable]
        public var runningGif:Class;
        public function CustomProgressBar()
        {
            super();
        }
        override protected function createChildren():void
        {
            super.createChildren();
            var gifImage:Image = new Image();
            gifImage.source = runningGif
            addChild(gifImage);
        }
    }
}

Answer 1

ProgressBar有皮肤属性。您可以将自定义蒙皮组件应用于它。下面的示例可以帮助您将皮肤添加到自定义进度条类中。

类名：-CustomProgressBar.as

package
{
    import mx.controls.ProgressBar;
    public class CustomProgressBar extends ProgressBar
    {
        public function CustomProgressBar()
        {
            super();
            this.setStyle("trackSkin", CustomProgressBarTrackSkin);
        }
    }
}

在您的皮肤类中，您可以添加将显示在进度栏上的图像。自定义进度条TrackSkin.mxml

<?xml version="1.0" encoding="utf-8"?>
<s:SparkSkin name="CustomProgressBarSkin"
             xmlns:fx="http://ns.adobe.com/mxml/2009"
             xmlns:s="library://ns.adobe.com/flex/spark" >
    <fx:Script>
        <![CDATA[
            override protected function initializationComplete():void {
                useChromeColor = true;
                super.initializationComplete();
            }
        ]]>
    </fx:Script>
    <!-- layer 1: fill -->
    <s:Rect left="2" right="2" top="2" bottom="2" >
        <s:fill>
            <s:BitmapFill source="@Embed('resource/images/running_animated_gif.gif')" fillMode="repeat" />
        </s:fill>
    </s:Rect>
    <!-- layer 2: border -->
    <s:Rect left="2" right="2" top="2" bottom="2" >
        <s:stroke>
            <s:LinearGradientStroke rotation="90">
                <s:GradientEntry color="0xFFFFFF" alpha="0.9" />
                <s:GradientEntry color="0xFFFFFF" alpha="0.5" />
            </s:LinearGradientStroke>
        </s:stroke>
    </s:Rect>
    <!-- layer 3: right edge -->
    <s:Rect right="1" top="2" bottom="2" width="1" >
        <s:fill>
            <s:SolidColor color="0x000000" alpha="0.55" />
        </s:fill>
    </s:Rect>
</s:SparkSkin>

以同样的方式，你可以为不同的皮肤创建不同的类，例如barSkin等…

这可能会帮助你。。。