[ActionScript 3.0] 运用Color类interpolateColor静态方法绘制渐变色

 1 package 
 2 {
 3     import fl.motion.Color;
 4     import flash.display.GradientType;
 5     import flash.display.Shape;
 6     import flash.display.Sprite;
 7     import flash.events.MouseEvent;
 8     import flash.geom.Matrix;
 9 
10     /**
11       * ...
12       * @author FrostYen
13       */
14     [SWF(width=700,height=800,backgroundColor=0x000000)]
15     public class GradientColor extends Sprite
16     {
17         public function GradientColor():void
18         {
19             setGradient(0xDFB920, 0x0000FF,70);
20         }
21 
22         /**
23            * 绘制从一种颜色过渡到另一种颜色的色块
24            * @param fromColor 开始颜色值
25            * @param toColor 最终颜色值
26            * @param total 色块数量
27            */
28         public function setGradient(fromColor:uint,toColor:uint,total:int):void
29         {
30             for (var i:int=0; i<total; i++)
31             {
32                 var pro:Number=Math.ceil(1/(total-1)*i*100)/100;
33                 var newcolor:uint = Color.interpolateColor(fromColor,toColor,pro);
34                 var rect:Sprite=new Sprite();
35                 rect.graphics.beginFill(newcolor);
36                 rect.graphics.drawRect(0,0,30,30);
37                 rect.graphics.endFill();
38                 rect.x = 100 + 50 * (i % 10);
39                 rect.y=100+50*Math.floor(i/10);
40                 addChild(rect);
41                 rect.name = newcolor.toString(16);
42                 rect.addEventListener(MouseEvent.CLICK,onClick);
43             }
44 
45             var shape:Shape = new Shape();
46             var cols:Array = [fromColor,toColor];
47             var alphas:Array = [1,1];
48             var rats:Array = [0,255];
49             var matr:Matrix = new Matrix();
50             matr.createGradientBox(480, 100, 0, 0, 0);
51             shape.graphics.clear();
52             shape.graphics.beginGradientFill(GradientType.LINEAR,cols,alphas,rats,matr);
53             //渐变填充颜色;
54             shape.graphics.drawRect(0,0,480,100);
55             shape.graphics.endFill();
56             shape.x = 100;
57             shape.y = this.stage.stageHeight - 150;
58             this.addChild(shape);
59         }
60 
61         private function onClick(e:MouseEvent):void
62         {
63             trace(e.currentTarget.name);//得出点击对象的颜色值
64         }
65     }
66 
67 }