我已经为使用InputMap的Swing应用程序实现了一些热键
getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(KeyStroke.getKeyStroke(KeyEvent.VK_A,Event.CTRL_MASK),"selectAll");
getActionMap().put("selectAll",new SelectAllAction());
它工作正常.现在,如果我想赶上,我怎么能做同样的事情
CTRL + MouseWheelUp
我尝试了一些组合,比如
getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(KeyStroke.getKeyStroke(MouseEvent.MOUSE_WHEEL,"zoom");
没有运气
谢谢
解决方法
您不能使用InputMap / ActionMap.您需要使用MouseWheelListener.然后,侦听器可以从ActionMap访问自定义Action.这是一个使用“Control 1”进行KeyStroke的简单示例：
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class MouseWheelTest extends JPanel implements MouseWheelListener {
private final static String SOME_ACTION = "control 1";
public MouseWheelTest() {
super(new BorderLayout());
JTextArea textArea = new JTextArea(10,40);
JScrollPane scrollPane = new JScrollPane(textArea);
add(scrollPane,BorderLayout.CENTER);
textArea.addMouseWheelListener(this);
Action someAction = new AbstractAction() {
public void actionPerformed(ActionEvent e) {
System.out.println("do some action");
}
};
// Control A is used by a text area so try a different key
textArea.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW)
.put(KeyStroke.getKeyStroke(SOME_ACTION),SOME_ACTION);
textArea.getActionMap().put(SOME_ACTION,someAction);
}
public void mouseWheelMoved(MouseWheelEvent e) {
if (e.isControlDown()) {
if (e.getWheelRotation() < 0) {
JComponent component = (JComponent)e.getComponent();
Action action = component.getActionMap().get(SOME_ACTION);
if (action != null)
action.actionPerformed( null );
} else {
System.out.println("scrolled down");
}
}
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
createAndShowGUI();
}
});
}
private static void createAndShowGUI() {
JFrame frame = new JFrame("MouseWheelTest");
frame.setDefaultCloSEOperation(JFrame.EXIT_ON_CLOSE);
frame.add( new MouseWheelTest() );
frame.pack();
frame.setLocationRelativeTo( null );
frame.setVisible(true);
}
}
