我的drawRoundRect没有绘制圆角矩形:( [Flash]

时间:2010-01-07 20:01:58

标签: flash actionscript-3 draw drawrect

我刚刚为一个新项目编写了一个Background类。背景基本上是2个圆角矩形,简单的笔触和填充颜色相互叠加。

无论如何,我现在只是想画出一个圆角矩形,但出于某种原因我在舞台上看不到任何地方:(没有错误,我的痕迹正确地追踪出来。This is the example我已经一直在关注。我还包含了我的Document类中的代码,该代码绘制了背景。

Background.as

package src.display{

import flash.display.DisplayObject;
import flash.display.Graphics;
import flash.display.JointStyle;
import flash.display.LineScaleMode;
import flash.display.Shape;
import flash.display.Sprite;
import flash.events.Event;

public class Background extends Sprite {

    private const position:Number = 0;

    private var child:Shape       = new Shape();
    private var bgColor:uint      = 0xE8E7E7;
    private var borderColor:uint  = 0xCCCCCC;
    private var borderSize:uint   = 1;
    private var cornerRadius:uint = 3;
    private var sizeW:uint;
    private var sizeH:uint;

    public function Background():void {
        if (stage) {
            init();
        } else {
            addEventListener(Event.ADDED_TO_STAGE, init);
        }
    }

    private function init(e:Event = null):void {
        removeEventListener(Event.ADDED_TO_STAGE, init);
    }

    public function draw(w, h):void {
        sizeW=w; //w & h are passed from Document class
        sizeH=h;

        child.graphics.beginFill(bgColor);
        child.graphics.lineStyle(borderSize, borderColor);
        child.graphics.drawRoundRect(position, position, sizeW-1, sizeH-1, cornerRadius);
        child.graphics.endFill();

        addChild(child);

        trace("child.x = "+child.x);
        trace("child.x = "+child.y);
        trace("child.w = "+child.width);
        trace("child.h = "+child.height);

    }
}

}

我的踪迹全部正确出现:

child.x = 0
child.x = 0
child.w = 520
child.h = 510

以下是我的Document类中的代码,它位于Background类中:

private function drawBackground():void
    {
        trace("\r"+"drawBackground called");

        bg = new Background();
        bg.draw(globalWidth, globalHeight);

        trace("drawBackground end");
    }

1 个答案:

答案 0 :(得分:3)

你必须将你的bg添加到flash显示列表中,例如进入舞台:

bg = new Background();
bg.draw(globalWidth, globalHeight);
stage.addChild(bg);

另外请注意,每次调用绘图函数时都不需要添加子项,将其添加到init函数中:

private function init(e:Event = null):void {
 removeEventListener(Event.ADDED_TO_STAGE, init);
 addChild(child);
}