Java Jbutton KeyListener [英] Java Jbutton KeyListener
本文介绍了Java Jbutton KeyListener的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有一个标有1-9的3x3网格的jbuttons表示数字键盘。我添加了一个actionlistener和keylistener,它们都调用相同的函数,所以如果他们点击btn1或按数字键盘上的1就会发生同样的事情。
I have a 3x3 grid of jbuttons labeled 1-9 representing the number pad. I have added an actionlistener and keylistener which both call to the same function, so if they click btn1 or press 1 on the number pad the same thing happens.
问题是当我在小键盘上按1时,我想看到btn1按下它,如果这是有意义的。
The problem is when I press 1 on the numpad, I want to see btn1 press down with it, if that makes sense.
搜索没有引导我做任何事情,有没有名字?
Searching didn't lead me to anything, is there a name for that?
推荐答案
使用:
- 键绑定API而不是
KeyListener
。密钥绑定唯一需要做的就是在相关按钮上调用doClick
... - 使用
doClick
以编程方式点击按钮
- The key bindings API instead of
KeyListener
. The only thing that the key binding needs to do, is calldoClick
on the associated button... - Use
doClick
to programmatically "click" the button
例如......
import java.awt.EventQueue;
import java.awt.GridLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import javax.swing.AbstractAction;
import javax.swing.ActionMap;
import javax.swing.InputMap;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.KeyStroke;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
/**
*
* @author shane
*/
public class Test {
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
new Test();
}
public Test() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class TestPane extends JPanel {
public TestPane() {
setLayout(new GridLayout(3, 3));
add(createButton("1", KeyEvent.VK_NUMPAD1));
add(createButton("2", KeyEvent.VK_NUMPAD2));
add(createButton("3", KeyEvent.VK_NUMPAD3));
add(createButton("4", KeyEvent.VK_NUMPAD4));
add(createButton("5", KeyEvent.VK_NUMPAD5));
add(createButton("6", KeyEvent.VK_NUMPAD6));
add(createButton("7", KeyEvent.VK_NUMPAD7));
add(createButton("8", KeyEvent.VK_NUMPAD8));
add(createButton("9", KeyEvent.VK_NUMPAD9));
}
protected JButton createButton(String name, int virtualKey) {
JButton btn = new JButton(name);
btn.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
System.out.println(e.getActionCommand() + " was clicked");
}
});
btn.setMargin(new Insets(8, 8, 8, 8));
InputMap im = btn.getInputMap(WHEN_IN_FOCUSED_WINDOW);
ActionMap am = btn.getActionMap();
im.put(KeyStroke.getKeyStroke(virtualKey, 0), "clickMe");
am.put("clickMe", new AbstractAction() {
@Override
public void actionPerformed(ActionEvent e) {
JButton btn = (JButton) e.getSource();
btn.doClick();
}
});
return btn;
}
}
}
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