java - JFreechart 右键单击​​ XYItemEntity

Question

我意识到，只有当用户左键单击图表时，才会调用 ChartMouseClicked 方法。当用户右键单击图表时，会调用 MousePressed() 和 mouseReleased() 方法。但我还需要更多东西。我需要它们在一起。我需要查找用户是否右键单击 XYItemEntity。然后我将显示新的弹出菜单项。如果用户选择菜单项，我将从 XYITEM 传递信息。如果不是 XYItemEntity，我将不会更新图表的 Popupmenu。这就是我如何检查 ChartMouseClicked 上的 XYITEM 实体。

panel.addChartMouseListener(new ChartMouseListener() {
        public void chartMouseClicked(final ChartMouseEvent event) {
            /** If Time Instance point is clicked */
            if (event.getEntity() instanceof XYItemEntity) {

}}

Answer 1

我设法找到了一个结合了chartMouseMoved 和mouseReleased 方法的解决方案。

 public void chartMouseMoved(final ChartMouseEvent event) {
            if (event.getEntity() instanceof XYItemEntity) {
                panel.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
                clickedSimulationItem = (XYItemEntity) event.getEntity();
            } else if (event.getEntity() instanceof PlotEntity) {
                handleMouseMoveOnPlot(event);
            } else {
                panel.setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
                clickedSimulationItem = null;
            }
        }


private void addMouseListener() {
    panel.addMouseListener(new MouseListener() {
        @Override
        public void mouseReleased(MouseEvent e) {
            if (e.isPopupTrigger()) {
                if (clickedSimulationItem != null) {

                        panel.getPopupMenu().add(new JMenuItem("denem"));
                        /** update pop up */
                    }
                }
            }
        }

        @Override
        public void mouseClicked(MouseEvent e) {
            // TODO Auto-generated method stub
        }

        @Override
        public void mousePressed(MouseEvent e) {
            // TODO Auto-generated method stub
        }

        @Override
        public void mouseEntered(MouseEvent e) {
            // TODO Auto-generated method stub
        }

        @Override
        public void mouseExited(MouseEvent e) {
            // TODO Auto-generated method stub
        }
    });
}