白鷺引擎
描述：顯示物件程式碼例項

/**
 * @copyright www.egret.com
 * @author city
 * @desc 顯示物件最基本的操作。
 *      顯示物件可以是外部載入的JPG、PNG圖片資源，也可以是程式繪製的形狀。
 *      所有的顯示物件顯示均需要新增到顯示列表。
 */

class Main extends egret.DisplayObjectContainer {

    public constructor() {
        super();
        this.once( egret.Event.ADDED_TO_STAGE, this
 
.onAddToStage, this );
    }

    private onAddToStage(event:egret.Event) {
        var imgLoader:egret.ImageLoader = new egret.ImageLoader;
        imgLoader.once( egret.Event.COMPLETE, this.imgLoadHandler, this );
        imgLoader.load( "resource/cartoon-egret_00.png" );
    }

    private _txInfo:egret.TextField;
    private
 
 _bgInfo:egret.Shape;

    private imgLoadHandler( evt:egret.Event ):void{

        var bmd:egret.BitmapData = evt.currentTarget.data;
        /*** 本示例關鍵程式碼段開始 ***/
        /// 將已載入完成的影象顯示出來
        var bird:egret.Bitmap = new egret.Bitmap( bmd );
        bird.x = 100;
        bird.y = 100;
        this.addChild( bird );
        /*** 本示例關鍵程式碼段結束 ***/
 


        /// 為定位設定基準點(即錨點)
        bird.anchorOffsetX = bmd.width / 2;
        bird.anchorOffsetY = bmd.height / 2;
        bird.x = this.stage.stageWidth * .5;
        bird.y = this.stage.stageHeight * .5;

        /// 提示資訊
        this._txInfo = new egret.TextField;
        this.addChild( this._txInfo );

        this._txInfo.size = 28;
        this._txInfo.x = 50;
        this._txInfo.y = 50;
        this._txInfo.textAlign = egret.HorizontalAlign.LEFT;
        this._txInfo.textColor = 0x000000;
        this._txInfo.type = egret.TextFieldType.DYNAMIC;
        this._txInfo.lineSpacing = 6;
        this._txInfo.multiline = true;

        this._txInfo.text =
                "輕觸螢幕調整顯示物件位置";

        this._bgInfo = new egret.Shape;
        this.addChildAt( this._bgInfo, this.numChildren - 1 );

        this._bgInfo.x = this._txInfo.x;
        this._bgInfo.y = this._txInfo.y;
        this._bgInfo.graphics.clear();
        this._bgInfo.graphics.beginFill( 0xffffff, .5 );
        this._bgInfo.graphics.drawRect( 0, 0, this._txInfo.width, this._txInfo.height );
        this._bgInfo.graphics.endFill();

        this.stage.addEventListener( egret.TouchEvent.TOUCH_BEGIN, ( evt:egret.TouchEvent )=>{
            bird.x = evt.localX ;
            bird.y = evt.localY ;
        }, this );

    }

}