获取当前显示的工具提示 [英] Get currently displaying tooltip

问题描述

是否可以通过某种方式将当前显示的工具提示作为字符串复制到剪贴板，而无需进行复杂的XY坐标计算即可映射到工具提示文本区域？这在带有一定角度显示的工具提示的图表上尤其具有挑战性，并且仅在显示时才能捕获。例如，要获取 ctl-c 来将显示的工具提示复制到剪贴板：

  PlotThisDaysData扩展了JFrame实现... KeyListener {
 
 @Override 
 public void keyTyped（KeyEvent e）{
 char typed = e.getKeyChar（）; 
 if（输入== KeyEvent.VK_C）/ * VK_C？* / {
 
字符串tooltipStr = myChart。???（）; //<<<<<<<获得显示工具提示<<<< 
 
 StringSelection选择= new StringSelection（tooltipStr）; 
剪贴板剪贴板= Toolkit.getDefaultToolkit（）。getSystemClipboard（）; 
 Clipboard.setContents（selection，selection）; 
} 
} 
  

也许在显示工具提示时发生了一些事件，所以我可以存储String指针并在输入 ctl-c 时使用吗？

。要在鼠标移动时将当前显示的工具提示复制到剪贴板，

1. 添加 ChartMouseListener 到图表面板，如此处所示。




2. 当听众看到所需的 ChartEntity 时，向 ChartPanel 询问相关文本并复制它到剪贴板。

     Toolkit toolkit = Toolkit.getDefaultToolkit（）; 
   剪贴板剪贴板= toolkit.getSystemClipboard（）; 
   …
    @Override 
    public void chartMouseMoved（ChartMouseEvent cme）{
   …
   字符串t = chartPanel.getToolTipText（cme.getTrigger（））; 
    Clipboard.setContents（new StringSelection（t），null）; 
   } 
     

类似的方法可以用于密钥绑定，如此处。使用图表面板的 getMousePosition（）来构造必需的 MouseEvent 触发器。

1. 获取图表面板的 InputMap ， ActionMap 和

     InputMap im = chartPanel.getInputMap（）; 
    
    ActionMap am = chartPanel.getActionMap（）; 
    int mask = Toolkit.getDefaultToolkit（）。getMenuShortcutKeyMask（）; 
     




2. 将所需的 KeyStroke 放入图表面板的 InputMap

     im.put（KeyStroke.getKeyStroke（KeyEvent .VK_C，掩码）， copytip）； 
     




3. 将相应的 Action 放入图表面板的 ActionMap

     am.put（ copytip，new AbstractAction（）{
    @Override 
    public void actionPerformed（ActionEvent e）{
    Point p = chartPanel.getMousePosition（）; 
    String t = chartPanel.getToolTipText（new MouseEvent（chartPanel） ，
    0，System.currentTimeMillis（），0，px，py，0，false））; 
   剪贴板.setContents（new StringSelection（t），null）; 
   } 
   }）; 
     

避免 KeyListener ，因为它是需要键盘焦点。

Is there some way to copy the currently displayed tooltip to the clipboard as a string without complex XY-coord calculation that maps to the tooltip text area? This is especially challenging on a chart with tooltip displayed at an angle, also to only capture if being displayed. For example to get ctl-c to copy the displaying tooltip to clipboard:

PlotThisDaysData extends JFrame implements ... KeyListener{

@Override
public void keyTyped( KeyEvent e ) {
    char typed = e.getKeyChar();
    if ( typed == KeyEvent.VK_C ) /*VK_C?*/ {

        String tooltipStr = myChart.???();  // <<<<<<<<<<<<< get displaying tooltip <<<<

        StringSelection selection = new StringSelection( tooltipStr );
        Clipboard clipboard = Toolkit.getDefaultToolkit().getSystemClipboard();
        clipboard.setContents( selection, selection );
    }
}

Perhaps there is some event when a tooltip gets displayed so I can store a String pointer and use when ctl-c is entered?

解决方案

Tooltips are displayed in response to mouse events received by the chart's enclosing ChartPanel. To copy the currently displayed tooltip to the clipboard as the mouse moves,

1. Add a ChartMouseListener to the chart panel, as shown here.

2. When your listener sees a desired ChartEntity, ask the ChartPanel for the relevant text and copy it to the clipboard.

   Toolkit toolkit = Toolkit.getDefaultToolkit();
   Clipboard clipboard = toolkit.getSystemClipboard();
   …
       @Override
       public void chartMouseMoved(ChartMouseEvent cme) {
           …
           String t = chartPanel.getToolTipText(cme.getTrigger());
           clipboard.setContents(new StringSelection(t), null);
       }
   

A similar approach can be used in a key binding, as shown here. Use the chart panel's getMousePosition() to construct the required MouseEvent trigger.

1. Get the chart panel's InputMap, ActionMap, and the platform's shortcut mask.

   InputMap im = chartPanel.getInputMap();
   ActionMap am = chartPanel.getActionMap();
   int mask = Toolkit.getDefaultToolkit().getMenuShortcutKeyMask();
   

2. Put the desired KeyStroke in the chart panel's InputMap

   im.put(KeyStroke.getKeyStroke(KeyEvent.VK_C, mask), "copytip");
   

3. Put the corresponding Action in the chart panel's ActionMap

   am.put("copytip", new AbstractAction() {
       @Override
       public void actionPerformed(ActionEvent e) {
           Point p = chartPanel.getMousePosition();
           String t = chartPanel.getToolTipText(new MouseEvent(chartPanel,
               0, System.currentTimeMillis(), 0, p.x, p.y, 0, false));
           clipboard.setContents(new StringSelection(t), null);
       }
   });
   

Avoid KeyListener, as it requires keyboard focus.

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