> > > constructor > protected CanvasElement() > > It means that you can derive your own class for CanvasElement. > Adding it in a GWT container works for me. > > I agree with you : I don't understand why there is also a Canvas > class, and why the constructor is private ? > > Canvas is a Widget (derives from FocusWidget). CanvasElement is just a wrapper around the DOM element <canvas> (derives com.google.gwt.dom.client.Element). To be precise, CanvasElement is not even a wrapper it is a JavaScriptObject which means that you can not create it in Java (by calling a constructor). Instead, we have to use Document.get().createCanvasElement() which does its work by calling a JSNI method. I want the widget so that I can do all the event handling in Java (FocusWidget implements tons of Has*Handlers interfaces).
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