如何防止组件在Flex 3中被拖出舞台 [英] How to prevent a component from being dragged out of the stage in Flex 3

问题描述

问题：
如何约束一个简单的方法来解决这个问题？ Flex3中的TitleWindow被拖出屏幕/舞台？有没有办法将TitleWindow限制在查看区域？

例如：假设我有一个占用屏幕100％的应用程序。接下来，我通过PopUpManager创建一个TitleWindow。然后，我可以继续单击并按住（拖动）该窗口，然后释放鼠标按钮。那个窗口现在已经在某个地方失去了屏幕。有没有办法阻止窗口被拖出查看区域？

感谢您的帮助。

解决方案

这是一个非常古老的帖子，但这里有另一种方法：
无论是否扩展组件，在TitleWindow定义中添加以下行： move：doMove（event）
导入应用程序库（导入mx.core.Application;）
并添加doMove函数：

 private function doMove（event：Event）：void 
 {//将TW保存在布局中
 var appW：Number = Application.application.width; 
 var appH：Number = Application.application.height; 
 if（this.x + this.width> appW）
 {
 this.x = appW-this.width; 
 
 if（this.x< 0）
 {
 this.x = 0; 
 
 if（this.y + this.height> appH）
 {
 this.y = appH-this.height; 
 
 if（this.y <0）
 {
 this.y = 0; 
} 
} 
  

I think there is a simple solution to this question, just not simple enough for me to find it.

Question: How do you constrain a TitleWindow in Flex 3 from being dragged off the screen/stage? Is there a way to restrict the TitleWindow to the viewing area?

Example: Let's say I have an application that take 100% of the screen. Next, I create a TitleWindow via the PopUpManager. I can then proceed to click and hold (drag) that window off the screen, then release the mouse button. That window is now lost off-screen somewhere. Is there a way to keep the window from being dragged beyond the viewing area?

Thanks for the help in advance.

解决方案

this is a very old post, but here's another way of doing it: Whether you are extending the component or not, in the TitleWindow definition add the following line: move:"doMove(event)" Import the Application library (import mx.core.Application;) and add the doMove function:

private function doMove(event:Event):void
{//keeps TW inside layout
    var appW:Number=Application.application.width;
    var appH:Number=Application.application.height;
    if(this.x+this.width>appW)
    {
        this.x=appW-this.width;
    }
    if(this.x<0)
    {
        this.x=0;
    }
    if(this.y+this.height>appH)
    {
        this.y=appH-this.height;
    }
    if(this.y<0)
    {
        this.y=0;
    }
}

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