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研究flash的绘画功能

2010-06-16 16:03:35| 分类： Flex | 标签： |举报 |字号大中小订阅

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其实绘画功能的代码还是比较简单的，就看你知不知道了。你需要避过几个注意点：

1、flex4 中application类已经不能再使用addChild来添加ui组件，而是要用AddElement（SpriteVisualElement）来进行添加

注意了，SpriteVisualElement这个类是在spark.core.SpriteVisualElement中，IDE中无法自动显示智能提示出这个包的位置，需要我们进行手动进行输入。具体贴出代码如下：

import mx.events.FlexEvent;
import flash.geom.Matrix;
import mx.core.UIComponent;
import spark.core.SpriteVisualElement;

private function appCompHandler(event:FlexEvent):void
{
var testGrp:TestGraphics = event.target as TestGraphics;

var sprve:SpriteVisualElement = new SpriteVisualElement;

var fillType:String = GradientType.LINEAR;
var colors:Array = [0xFF0000, 0x0000FF];
var alphas:Array = [1, 1];
var ratios:Array = [0x00, 0xFF];
var matr:Matrix = new Matrix();
matr.createGradientBox(20, 20, 0, 0, 0);
var spreadMethod:String = SpreadMethod.PAD;
sprve.graphics.beginGradientFill(fillType, colors, alphas, ratios, matr, spreadMethod);
sprve.graphics.drawRect(0,0,100,100);

this.addElement(sprve);
}

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