Nevron .NET Vision Documentation
Porting from Q4 2007 to Q1 2008

AJAX Mouse Events

The following properties of the NDrawingView object were removed:

 

NDrawingView.AsyncClickEventEnabled

NDrawingView.AsyncDoubleClickEventEnabled

NDrawingView.AsyncMouseMoveEventEnabled

NDrawingView.AsyncMouseUpEventEnabled

NDrawingView.AsyncMouseDownEventEnabled

 

The following properties and events of the NDrawingView object were added instead:

 

NDrawingView.AjaxTools

NDrawingView.QueryAjaxTools

 

The former mouse event handling and routing mechanism was replaced by a client side controller architecture. Pairs of client side tool class and server side tool definition class were added for all types of mouse events. To enable a callback mouse event, the corresponding tool definition must be added to the diagram control’s AjaxToolscollection property. Tools must be added to the AjaxTools collection from a handler of the new QueryAjaxTools event. Adding tools from another code point will produce unpredictable results. Here is an example on how to enable the mouse click callback event:

C#
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protected void NDrawingView1_QueryAjaxTools(object sender, EventArgs e)
{
    NDrawingView1.AjaxTools.Add(new NAjaxMouseClickCallbackTool(true));
}
Visual Basic
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Protected Sub NDrawingView1_QueryAjaxTools(ByVal sender As Object, ByVal e As EventArgs)
    NDrawingView1.AjaxTools.Add(New NAjaxMouseClickCallbackTool(True))
End Sub

If no interactive areas are defined, the click callback tool, as initialized above, will cause mouse clicks to be processed for the whole diagram image. To define interactive areas of the control, add interactivity styles to the diagram elements in your Form_Load page method, like this:

C#
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myShape.Style.InteractivityStyle = new NInteractivityStyle(true);
Visual Basic
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myShape.Style.InteractivityStyle = New NInteractivityStyle(True)

To optimize the mouse move event handling the new AsyncMouseOver and AsyncMouseOut events can be used instead of the AsyncMouseMove event.

 

For more details, see the documentation on NInteractivityStyle and the web examples that are installed on your machine.

 

 


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