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I was wondering if GWT provides some friendly mechanism to acomplish something as this demo presents. Maybe not draging, but I need to handle simple clicks on shapes I had previously drawn on the canvas (Images possibly)
This is not possible with the GwtCanvas nor the HtmlCanvas. You must manually detect click location and compare that to a managed state of drawn shapes.
It is possible that there is a library for this, but I cannot offer any recommendations.
You could also consider SVG, which does support event handlers on drawn items.