[mapguide-users] Re: OnSelectionChanged in AJAX viewer?

[SriRam007]

Hooking OnSelectionChanged is working

**************Working**************
    var mapFrame = null;   // A reference to the map frame
    var originalMapFrameOnSelectionChanged = null; // storage for the
original onSelectionChanged function
    function OnSelectionChanged() // when something is selected on the map
    {
    //debugger
        var count = viewerFrame.GetMapFrame().GetSelectedCount();
        alert(count + " features selected");
        originalMapFrameOnSelectionChanged();
    }

    function InitDocument()
     {
     //debugger
        mapFrameRef = frames[0].frames[1];
        originalMapFrameOnSelectionChanged =
mapFrameRef.parent.OnSelectionChanged;
        mapFrameRef.parent.OnSelectionChanged = OnSelectionChanged;               
     }
**************Working**************

Like same i want to hook the OnMouseWheel event

And I m trying like this

 var mapFrame = null;   // A reference to the map frame
    var originalMapFrameOnMouseWheel = null; // storage for the original
onSelectionChanged function
    function MyOnMouseWheel() // when something is selected on the map
    {
    debugger
//        var count = viewerFrame.GetMapFrame().GetSelectedCount();
//        alert(count + " features selected");
        originalMapFrameOnMouseWheel();
    }

    function InitDocument()
    {
    debugger
        mapFrameRef = frames[0].frames[1];
        originalMapFrameOnMouseWheel = mapFrameRef.OnMouseWheel;
        mapFrameRef.OnMouseWheel = MyOnMouseWheel;               
    }

But Error is showing 


http://n2.nabble.com/file/n4895432/untitled.bmp 



Please anyone help

thanks

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