不到40行代码的填色游戏

//先是定义一个画矩形函数
import flash.display.BitmapData;
import flash.geom.*;
function createRectangle(x:Number, y:Number, w:Number, h:Number, mc:MovieClip) {
        mc.moveTo(x, y);
        mc.lineTo(x+w, y);
        mc.lineTo(x+w, y+h);
        mc.lineTo(x, y+h);
        mc.lineTo(x, y);
        mc.endFill();
}
//然后对canvas的每个mc写onRelease响应
for (i in canvas) {
        if (typeof (canvas[i]) == "movieclip") {
                if (canvas[i].type != "rect") {
                        canvas[i].onRelease = function() {
                                                                                    //如果已经被上色了，就会有一个与之绑定的_mc，再次上色之前，要把这个link_mc删掉
                                if (this.link_mc._name) {
                                        this.link_mc._bmp.dispose();
                                        this.link_mc.removeMovieClip();
                                }
                                                                                     //根据_mc的位置和大小，画一个匹配的矩形，然后进行类型和链接的设置
                                var rect_mc:MovieClip = canvas.createEmptyMovieClip("rect"+canvas.getNextHighestDepth(), canvas.getNextHighestDepth());
                                rect_mc.type = "rect";
                                this.link_mc = rect_mc;
                                rect_mc.bmp = new BitmapData(20, 20, false, 0xFF0000);
                                rect_mc.bmp.draw(select_color_mc);
                                rect_mc.beginBitmapFill(rect_mc.bmp);
                                var r:Object = this.getBounds(canvas);
                                createRectangle(r.xMin, r.yMin, r.xMax-r.xMin, r.yMax-r.yMin, rect_mc);
                                                                                     //最后做一个mask，这样就达到了上色的效果
                                rect_mc.setMask(this);
                        };
                }
        }
}
//对颜色拾取器进行onRelease设定
for (i in colors) {
        if (typeof (colors[i]) == "movieclip") {
                colors[i].onRelease = function() {
                        select_color_mc=this
                };
        }
}