Flex4之获取各种颜色RGB值的例子
接下来的例子演示了Flex中如何将颜色的值转化为字符串，根据RGB计算出各个值以及格式化颜色值。
<?xml version="1.0" encoding="utf-8"?><s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark" xmlns:mx="library://ns.adobe.com/flex/mx" backgroundColor="white" minWidth="955" minHeight="600"><fx:Declarations><!-- 将非可视元素（例如服务、值对象）放在此处 --><fx:Model id="colorObj"><root><color>{colorPicker.selectedColor}</color><red>{rChannel(colorObj.color)}</red><green>{gChannel(colorObj.color)}</green><blue>{bChannel(colorObj.color)}</blue></root></fx:Model></fx:Declarations><fx:Script><![CDATA[private function fixedInt(value:int, mask:String):String {return String(mask + value.toString(16)).substr(-mask.length).toUpperCase();}private function rChannel(value:int):int {return value >> 16 & 0xFF;}private function gChannel(value:int):int {return value >> 8 & 0xFF;}private function bChannel(value:int):int {return value >> 0 & 0xFF;}private function rgbToInt(r:int, g:int, b:int):int {return r << 16 | g << 8 | b << 0;}]]></fx:Script><mx:Form><mx:FormItem label="Color:" direction="horizontal"><mx:ColorPicker id="colorPicker" /><mx:Label text="0x{fixedInt(colorPicker.selectedColor, '000000')}" width="100" /></mx:FormItem><mx:FormItem label="Red:" direction="horizontal"><mx:Label text="{colorObj.red}" /><mx:Label text="(0x{fixedInt(colorObj.red, '00')})" /></mx:FormItem><mx:FormItem label="Green:" direction="horizontal"><mx:Label text="{colorObj.green}" /><mx:Label text="(0x{fixedInt(colorObj.green, '00')})" /></mx:FormItem><mx:FormItem label="Blue:" direction="horizontal"><mx:Label text="{colorObj.blue}" /><mx:Label text="(0x{fixedInt(colorObj.blue, '00')})" /></mx:FormItem><mx:FormItem label="Color:" direction="horizontal"><mx:Label text="{colorObj.color}" /><mx:Label text="(0x{fixedInt(rgbToInt(colorObj.red, colorObj.green, colorObj.blue), '000000')})" /></mx:FormItem></mx:Form><mx:Label text="{int(0xFF00FF)}" /></s:Application>?
可以发现的是FLEX中适用的颜色RGB值一般都会加上0x作为前缀，所以要注意这一点了，对比一下常规颜色RGB值就可以发现了，可以参考下这个博客上介绍常规颜色RGB值
http://blog.sina.com.cn/s/blog_3e5694650100jfch.html?retcode=0
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