Question

在flex中开发应用程序，加载动作脚本文件。

<DrawingArea id="drawingArea"   xmlns="*" width="100%" height="100%" add="drawingArea_addHandler(event)"/>

我需要动态添加它，如何做到这一点？指导我

更新这是我的绘图区域如何创建var da:DrawingArea=new DrawingArea 如何访问监听器功能？公共函数DrawingArea（） { 超级（）;

        addEventListener(FlexEvent.CREATION_COMPLETE, function(event:FlexEvent):void {
            erase();
        });

        addEventListener(MouseEvent.MOUSE_DOWN, function(event:MouseEvent):void {
            x1 = mouseX;
            y1 = mouseY;
            isDrawing = true;
        });

        addEventListener(MouseEvent.MOUSE_MOVE, function(event:MouseEvent):void {
            if (!event.buttonDown)
            {
                isDrawing = false;
            }

            x2 = mouseX;
            y2 = mouseY;
            if (isDrawing)
            {
                graphics.lineStyle(2, drawColor);
                graphics.moveTo(x1, y1);
                graphics.lineTo(x2, y2);
                x1 = x2;
                y1 = y2;
            }
        });

        addEventListener(MouseEvent.MOUSE_UP, function(event:MouseEvent):void {
            isDrawing = false;
        });
    }

Answer 1

您将无法在内存中加载文件，然后在Acionscript中执行它，如果这是您想要的。但是，您可以根据某些事件（例如用户单击或特定的超时时间）在运行时创建DrawingArea（或任何其他元素）。

Answer 2

在这种情况下，您的函数是内联定义的。直到你不给他们名字，无论如何都不可能。我会建议

addEventListener(MouseEvent.MOUSE_DOWN, mouseDownFunction);
public function mouseDownFunction(event:MouseEvent = null ):void {
        x1 = mouseX;
        y1 = mouseY;
        isDrawing = true;
    }

然后它们应该可以通过对象访问。 DrawingArea.mouseDownFunction（）

Answer 3

我对您的代码进行了更改。

package
    {
        import flash.events.MouseEvent;

        import mx.core.UIComponent;

        public class DrawingArea
        {
            private var _target:UIComponent;

            private var _x1:Number;
            private var _y1:Number;

            private var _x2:Number;
            private var _y2:Number;

            [Bindable]
            private var _isDrawing:Boolean = false;

            private var _drawColor:uint = 0xFFFF00

            public function DrawingArea(target:UIComponent)
            {
                //TODO: implement function
                _target = target
                _target.addEventListener(MouseEvent.MOUSE_DOWN, downEvent, false, 0, true);
                _target.addEventListener(MouseEvent.MOUSE_UP, upEvent, false, 0, true);
                _target.addEventListener(MouseEvent.MOUSE_OUT, upEvent, false, 0, true);
            }

            private function downEvent(event:MouseEvent):void
            {
                _x1 = event.localX;
                _y1 = event.localY;
                _isDrawing = true;

                _target.addEventListener(MouseEvent.MOUSE_MOVE, moveEvent, false, 0, true);
            }

            private function moveEvent(event:MouseEvent):void
            {
                if (!event.buttonDown)
                {
                    _isDrawing = false;
                }

                _x2 = event.localX;
                _y2 = event.localY;
                if (_isDrawing)
                {
                    _target.graphics.lineStyle(2, _drawColor);
                    _target.graphics.moveTo(_x1, _y1);
                    _target.graphics.lineTo(_x2, _y2);
                    _x1 = _x2;
                    _y1 = _y2;
                }

            }

            private function upEvent(event:MouseEvent):void
            {
                _isDrawing = false;

                _target.removeEventListener(MouseEvent.MOUSE_MOVE, moveEvent);
            }

            public function set drawColor(value:uint): void{
                _drawColor = value;
            }

        }
    }

创建了一个类DrawingAreaView.mxml，其中为DrawingArea创建了对象，并将类本身作为容器传递。

<?xml version="1.0" encoding="utf-8"?>
<mx:Canvas xmlns="components.*" xmlns:mx="http://www.adobe.com/2006/mxml"
           creationComplete="onInit();">

    <mx:Script>
        <![CDATA[
            import components.DrawingArea;

            private var drawingArea:DrawingArea;

            private function onInit():void {
                drawingArea = new DrawingArea(this);
            }
        ]]>
    </mx:Script>
</mx:Canvas>

在Application中使用上面的类。

<DrawingAreaView id="drawingArea" width="100%" height="100%"/>

or

private var _drawingAreaView:DrawingAreaView = new DrawingAreaView();

parentObject.addChild(_drawingAreaView);

是否可以在flex中动态添加（.as）actionscript文件？

3 个答案: