Jens, ok, I understood, thank you! среда, 15 августа 2018 г., 13:41:39 UTC+7 пользователь Jens написал: > > While you can paint an image into the canvas, the canvas itself is just > pixel. When you click on the canvas you actually click the rendered pixel > and not the image instance used to paint these pixels into the canvas. So a > click handler on the image does not make any sense. > > To work effectively with canvas you usually have to define a model (often > called scene graph) that represents what you have painted / want to paint > into the canvas. Then you add event handlers to the canvas and when you > receive events you use the x/y position to work with / modify your model. > Then you re-render the updated model into the canvas. > > So usually you want to use some library. Maybe Lienzo suites your needs: > > https://github.com/ahome-it/lienzo-core > https://www.lienzo-core.com/lienzo-ks/ > > -- J. >
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