實現框選刪除畫面上物件－法奇的帝窩

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在論壇幫人解答的問題答案

功能就是像在Windows內拉選出一個框

可以把畫面上的物件通通刪掉

本來一開始是提供思路給發問的人

後來感覺還是直接寫Code給他比較快

不過因為只是給人參考用，架構我沒有寫得非常嚴謹，也沒做防呆

有興趣的人可以參考參考

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//先配置場景上的物件
var nowthis = this ;

//配置畫圖按鈕(紅色)
var DrawBtn : MovieClip = new MovieClip();
with(DrawBtn.graphics){
lineStyle(1,0xff0000);
beginFill(0xff0000);
drawRect(0,0,50,50);
}
DrawBtn.x = 150 ;
DrawBtn.y =350 ;
nowthis.addChild(DrawBtn);
DrawBtn.buttonMode =true ;

//配置清除畫面上畫圖的按鈕(綠色)
var ClearBtn : MovieClip = new MovieClip();
with(ClearBtn.graphics){
lineStyle(1,0x00ff00);
beginFill(0x00ff00);
drawRect(0,0,50,50);
}
ClearBtn.x = 250 ;
ClearBtn.y =350 ;
nowthis.addChild(ClearBtn);
ClearBtn.buttonMode = true ;

//配置裝圖形的畫布
var Paint : MovieClip = new MovieClip();
nowthis.addChild(Paint);

//用來當畫圖容器的物件
var DrawObj : MovieClip ;
var ClearDrawObj : MovieClip ;
//======================================================
//場景布置完成，開始事件
DrawBtn.addEventListener(MouseEvent.CLICK,DrawHandler);
function DrawHandler(me:MouseEvent):void{
stage.addEventListener(MouseEvent.MOUSE_DOWN,DrawNow);
}
function DrawNow(me:Event):void{
if (me.type == 'enterFrame'){
with (DrawObj.graphics){
clear();
lineStyle(1);
beginFill(0x666666);
moveTo(DrawObj.Sx,DrawObj.Sy);
lineTo(DrawObj.Sx,Paint.mouseY);
lineTo(Paint.mouseX,Paint.mouseY);
lineTo(Paint.mouseX,DrawObj.Sy);
lineTo(DrawObj.Sx,DrawObj.Sy);
}
}else if (me.type == 'mouseDown'){
DrawObj = new MovieClip();
DrawObj.Sx = Paint.mouseX;
DrawObj.Sy = Paint.mouseY;
Paint.addChild(DrawObj);
stage.removeEventListener(MouseEvent.MOUSE_DOWN,DrawNow);
stage.addEventListener(MouseEvent.MOUSE_UP,DrawNow);
stage.addEventListener(Event.ENTER_FRAME,DrawNow);
}else if (me.type == 'mouseUp'){
stage.removeEventListener(MouseEvent.MOUSE_UP,DrawNow);
stage.removeEventListener(Event.ENTER_FRAME,DrawNow);
}
}

ClearBtn.addEventListener(MouseEvent.CLICK,ClearHandler);
function ClearHandler(me:MouseEvent):void{
stage.addEventListener(MouseEvent.MOUSE_DOWN, ClearNow);
}
function ClearNow(me:Event):void{
if (me.type == 'enterFrame'){
with (ClearDrawObj.graphics){
clear();
lineStyle(1);
beginFill(0x66ff66);
moveTo(ClearDrawObj.Sx,ClearDrawObj.Sy);
lineTo(ClearDrawObj.Sx,Paint.mouseY);
lineTo(Paint.mouseX,Paint.mouseY);
lineTo(Paint.mouseX,ClearDrawObj.Sy);
lineTo(ClearDrawObj.Sx,ClearDrawObj.Sy);
}
for(var i : int = 0 ; i < Paint.numChildren ; i++){
var TmpObj = Paint.getChildAt(i);
if (TmpObj.hitTestObject(ClearDrawObj)){
TmpObj.alpha = .5 ;
}else{
TmpObj.alpha = 1;
}
}

}else if (me.type == 'mouseDown'){
ClearDrawObj = new MovieClip();
ClearDrawObj.Sx = Paint.mouseX;
ClearDrawObj.Sy = Paint.mouseY;
Paint.addChild(ClearDrawObj);
stage.removeEventListener(MouseEvent.MOUSE_DOWN,ClearNow);
stage.addEventListener(MouseEvent.MOUSE_UP,ClearNow);
stage.addEventListener(Event.ENTER_FRAME,ClearNow);
}else if (me.type == 'mouseUp'){
stage.removeEventListener(MouseEvent.MOUSE_UP,ClearNow);
stage.removeEventListener(Event.ENTER_FRAME,ClearNow);
var ClearArr :Array= [] ;
for (i = 0 ;  i < Paint.numChildren ; i++){
TmpObj = Paint.getChildAt(i);
if (TmpObj.alpha != 1){
ClearArr.push(TmpObj);
}
}
for (i = 0 ; i < ClearArr.length ; i++){
Paint.removeChild(ClearArr[i]);
}

}
}