ImageCanvasMng(ImageCanvas view)
ImageCanvasMng(ImageCanvas view, ViewerCtrl control)
    ImageCanvasMng(ImageCanvas view)    {        this.view = view;        width = ViewerUIF.DEFAULT_WIDTH;        magFactor = ViewerUIF.DEFAULT_MAG;        drawingArea = new Rectangle();        onOff = true;        pin = false;        painting = false;        attachListeners();    }