ActionScript 3 手动拖动对象

Posted 2021-05-23

//------------------------------------------------------------------------------------
			private function startDragHandler(e:MouseEvent = null):void
			{
				/*
					Set custom cursor
				*/
				//if(!dragCursor) dragCursor = new DragCursor();
				CursorManager.setCursor(DragCursor as Class,CursorManagerPriority.HIGH,0,0);
				
				isMouseOffStage = false;
				this.stage.addEventListener(Event.MOUSE_LEAVE,mouseLeftStage);
				this.stage.addEventListener(MouseEvent.MOUSE_OUT,mouseOutStage);
				this.stage.addEventListener(MouseEvent.MOUSE_OVER,mouseOverStage);
				this.stage.addEventListener(MouseEvent.MOUSE_UP,stopDragHandler);
				if(DataModel.getInstance().isAllowDragShirt)
				{
					
					moveFromPointX = this.mouseX;
					moveFromPointY = this.mouseY;
					
					addEventListener(Event.ENTER_FRAME,draggingHandler);
				}
			}
			//------------------------------------------------------------------------------------
			private function draggingHandler(e:Event = null):void
			{
				var targetX:Number = this.x+(this.mouseX-moveFromPointX);
				var targetY:Number = this.y+(this.mouseY-moveFromPointY);
				
				if(targetX>0 || targetX<maxMoveX) targetX = this.x;
				if(targetY>0 || targetY<=maxMoveY) targetY = this.y;
				
				this.x = targetX;
				this.y = targetY;
				
				moveFromPointX = this.mouseX;
				moveFromPointY = this.mouseY;
			}
			//------------------------------------------------------------------------------------
			private function stopDragHandler(e:MouseEvent = null):void
			{
				moveFromPointX=this.x;
				moveFromPointY=this.y;
					
				CursorManager.removeAllCursors();
				if(DataModel.getInstance().isBusy) CursorManager.setBusyCursor();
				
				this.stage.removeEventListener(Event.MOUSE_LEAVE,mouseLeftStage);
				this.stage.removeEventListener(MouseEvent.MOUSE_OUT,mouseOutStage);
				this.stage.removeEventListener(MouseEvent.MOUSE_OVER,mouseOverStage);
				
				this.removeEventListener(Event.ENTER_FRAME,draggingHandler);
				//stopDrag();
			}