如何在jdialog容器中监听按键事件？

Question

我有一个包含许多行文本字段和提交按钮的JDialog。我想知道是否可以将eventListener添加到容器中以触发提交按钮。

Answer 1

尝试添加

frame.getRootPane().setDefaultButton(button);
    // removing the binding for pressed
    frame.getRootPane().getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW)
        .put(KeyStroke.getKeyStroke("ENTER"), "none");
    // retarget the binding for released
    frame.getRootPane().getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW)
        .put(KeyStroke.getKeyStroke("released ENTER"), "press");

或者执行以下

之类的操作

 addKeyListener(new KeyListener(){  
       @Override
       public void keyPressed(KeyEvent ke)
       {
       if (e.getKeyCode().equals(KeyEvent.VK_ENTER))
         { 
      //copy paste the logic you wrote inside the ActionPerformed method
         }
      }});

      setFocusable(true);//Setting Focus true for ur container

      requestFocusInWindow();//Requesting the focus. Without this, KeyEvent will not trigger on your container

Answer 2

将 Enter 绑定到Action的一种便捷方法是通过根窗格的setDefaultButton()方法。您还可以使用key binding中的Action，如图所示here。

JDialog d = new JDialog(…);
Action submit = new AbstractAction("Submit") {

    @Override
    public void actionPerformed(ActionEvent e) {
        // handle submit
    }
};
private JButton b = new JButton(submit);
…
d.getRootPane().setDefaultButton(b);