我正在制作一个程序,我希望程序中的所有按钮都有快捷方式。示例 ctrl+a 执行按钮 1。
我还希望用户可以更改这些快捷方式
所以这是我用来添加键绑定(bind)的代码
InputMap IM = component.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW);
IM.put(KeyStroke.getKeyStroke(KeyEvent.VK_B, InputEvent.CTRL_DOWN_MASK |
InputEvent.ALT_DOWN_MASK), "BUTTON ONE ID");
ActionMap actionMap = component.getActionMap();
actionMap.put("BUTTON ONE ID", new AbstractAction() {
@Override
public void actionPerformed(ActionEvent e) {
actionListener.actionPerformed(e);
}
});
现在,由于我希望用户可以更改这些内容,因此我希望能够使用第三行上的“BUTTON ONE ID”来获取其信息。我希望能够知道我输入的键是什么以及您是否需要按住 ctrl 或 alt 作为快捷方式
所以我想要以下代码
if("BUTTON ONE ID"){
//print KeyEvent/keyCode info and if we need to hold ctrl, alt or shift?
//and then i want to be able to change the key bindings
}
如何使用“BUTTON ONE ID”执行此操作,或者这是一种更好的方法。谢谢
最佳答案
好的,这是一个关于如何允许用户生成自己的击键的快速示例。它基本上捕获 CTRL、SHIFT、ALT 和 META 键的状态并记录最后一个无“修饰符” “按键。
它提供了一个简单的 getKeyStroke
方法来返回由配置的状态生成的击键,在本例中,您会发现它在以下情况下打印 KeyStroke
“键入”一个键,这是为了调试而完成的
import java.awt.EventQueue;
import java.awt.GridBagLayout;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JToggleButton;
import javax.swing.KeyStroke;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.border.EmptyBorder;
public class ExampleLKeyConfig {
public static void main(String[] args) {
new ExampleLKeyConfig();
}
public ExampleLKeyConfig() {
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 KeyCapturePane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class KeyCapturePane extends JPanel {
private JToggleButton ctrlKey;
private JToggleButton altKey;
private JToggleButton shiftKey;
private JToggleButton metaKey;
private JButton strokeKey;
private int keyCode;
public KeyCapturePane() {
setBorder(new EmptyBorder(10, 10, 10, 10));
setLayout(new GridBagLayout());
ctrlKey = new JToggleButton(KeyEvent.getModifiersExText(KeyEvent.CTRL_DOWN_MASK));
altKey = new JToggleButton(KeyEvent.getModifiersExText(KeyEvent.ALT_DOWN_MASK));
shiftKey = new JToggleButton(KeyEvent.getModifiersExText(KeyEvent.SHIFT_DOWN_MASK));
metaKey = new JToggleButton(KeyEvent.getModifiersExText(KeyEvent.META_DOWN_MASK));
strokeKey = new JButton("-");
updateMetaState(new KeyEvent(this, 0, 0, 0, 0, ' '));
add(ctrlKey);
add(altKey);
add(shiftKey);
add(metaKey);
add(strokeKey);
setFocusable(true);
addKeyListener(new KeyAdapter() {
@Override
public void keyPressed(KeyEvent e) {
updateMetaState(e);
int code = e.getKeyCode();
if (code != KeyEvent.VK_CONTROL && code != KeyEvent.VK_ALT && code != KeyEvent.VK_SHIFT && code != KeyEvent.VK_META) {
strokeKey.setText(KeyEvent.getKeyText(code));
keyCode = code;
}
}
@Override
public void keyReleased(KeyEvent e) {
}
@Override
public void keyTyped(KeyEvent e) {
System.out.println(getKeyStroke());
}
});
addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
requestFocusInWindow();
}
});
}
protected int getModifiers() {
return (ctrlKey.isSelected() ? KeyEvent.CTRL_DOWN_MASK : 0)
| (altKey.isSelected() ? KeyEvent.ALT_DOWN_MASK : 0)
| (shiftKey.isSelected() ? KeyEvent.SHIFT_DOWN_MASK : 0)
| (metaKey.isSelected() ? KeyEvent.META_DOWN_MASK : 0);
}
public KeyStroke getKeyStroke() {
return KeyStroke.getKeyStroke(keyCode, getModifiers());
}
protected void updateMetaState(KeyEvent evt) {
updateMetaState(ctrlKey, evt.isControlDown());
updateMetaState(altKey, evt.isAltDown());
updateMetaState(shiftKey, evt.isShiftDown());
updateMetaState(metaKey, evt.isMetaDown());
}
protected void updateMetaState(JToggleButton btn, boolean isPressed) {
if (isPressed) {
btn.setSelected(!btn.isSelected());
}
}
}
}
现在,一切已经准备就绪。我在测试时让它打印了一些有趣的字符,因此您可能想要运行它并查看您可能想要过滤掉哪些键(提示 Caps Lock 可能是一个;))
现在,有了这个,您只需更改 InputMap
KeyStroke ks = ...;
IM.put(ks, "BUTTON ONE ID");
它会自动更新绑定(bind)
关于java - 在 Java 中使用键绑定(bind)和操作映射作为按钮的快捷键,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/46985936/