<?xml version="1.0"?>  
<!-- containers\intro\MousePosition.mxml -->  
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"  
    backgroundColor="white">  
     
    <mx:Script>  
        <![CDATA[  
          import mx.controls.Alert;  
          // Handle the mouseDown event generated  
          // by clicking in the application.  
          private function handleMouseDown(event:MouseEvent):void {  
                 
            // Convert the mouse position to global coordinates.  
            // The localX and localY properties of the mouse event contain  
            // the coordinates at which the event occurred relative to the  
            // event target, typically one of the  
            // colored internal Canvas controls.  
            // A production version of this example could use the stageX  
            // and stageY properties, which use the global coordinates,  
            // and avoid this step.  
            // This example uses the localX and localY properties only to  
            // illustrate conversion between different frames of reference.  
            var pt:Point = new Point(event.localX, event.localY);  
            pt = event.target.localToGlobal(pt);  
                 
            // Convert the global coordinates to the content coordinates  
            // inside the outer c1 Canvas control.  
            pt = c1.globalToContent(pt);  
                
            // Figure out which quadrant was clicked.  
            var whichColor:String = "border area";  
               
            if (pt.x < 150) {  
                if (pt.y < 150)  
                    whichColor = "red";  
                else  
                    whichColor = "blue";  
            }  
            else {  
                if (pt.y < 150)  
                    whichColor = "green";  
                else  
                    whichColor = "magenta";  
            }  
                 
            Alert.show("You clicked on the " + whichColor);  
          }  
        ]]>  
    </mx:Script>  
    <!-- Canvas container with four child Canvas containers -->  
    <mx:Canvas id="c1"  
        borderStyle="none"  
        width="300" height="300"  
        mouseDown="handleMouseDown(event);">  
         
        <mx:Canvas  
            width="150" height="150"  
            x="0" y="0"  
            backgroundColor="red">  
            <mx:Button label="I'm in Red"/>  
        </mx:Canvas>  
        <mx:Canvas  
            width="150" height="150"  
            x="150" y="0"  
            backgroundColor="green">  
            <mx:Button label="I'm in Green"/>  
        </mx:Canvas>  
        <mx:Canvas  
            width="150" height="150"  
            x="0" y="150"  
            backgroundColor="blue">  
            <mx:Button label="I'm in Blue"/>  
        </mx:Canvas>  
        <mx:Canvas  
            width="150" height="150"  
            x="150" y="150"  
            backgroundColor="magenta">  
            <mx:Button label="I'm in Magenta"/>  
        </mx:Canvas>  
    </mx:Canvas>  
</mx:Application>