Method mouseEvent

CvPlot/examples/examples_gui.cpp:193–209

            return getRect(mouseEvent.projection()).contains(mouseEvent.innerPoint());
        }
        bool mouseEvent(const MouseEvent &mouseEvent) {
            if (mouseEvent.event() == cv::MouseEventTypes::EVENT_LBUTTONDOWN
                && hitTest(mouseEvent)){
                _dragging = true;
                _dragOffset = mouseEvent.pos() - _point;
                return true;
            }
            if (_dragging && mouseEvent.event() == cv::MouseEventTypes::EVENT_MOUSEMOVE) {
                _point = cv::Vec2d(mouseEvent.pos()) - _dragOffset;
                return true;
            }
            if (_dragging && mouseEvent.event() == cv::MouseEventTypes::EVENT_LBUTTONUP) {
                _dragging = false;
                return true;
            }
            return false;
        };
    };
    Axes axes = makePlotAxes();
    axes.setXLim({ 0,2 });