I have attached a method to the ZoomChanged event in javascript to update a label of the current zoom percentage of the view. When ever this event is attached the annotations will not zoom in or out with the image. Am I doing something wrong by attaching to the zoomchanged event or is this a bug or is there another way i can get the current zoom percentage of the viewer whenever it changes?

 Thanks,

Colin

The WebAnnotationViewer needs to bind to the parent WebImageViewer's ZoomChanged event, setting this to a function of your own instead of using atalaEventAdd will cause it to break all annotation specific operations (such as automatically resizing annotations)

This is the recommended way to attach to this event:

atalaInitClientScript('OnPageLoad();');

function OnPageLoad(){
   atalaEventAdd(this, WebAnotationViewer1, 'ZoomChanged', OnZoomChanged);
}

function OnZoomChanged(){
   // do stuff ...
}