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

以下类可直接作为文档类测试，效果如图：

 

 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 }