Java Swing - 如何使用Control-Option-Space鍵在JCombobox中打開彈出窗口
我們想知道如何使用Control-Option-Space鍵在JCombobox中打開彈出窗口。
import java.awt.event.KeyEvent;
import javax.swing.JComboBox;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.KeyStroke;
public class Main extends JPanel {
public Main() {
JComboBox cpmbo = new JComboBox();
cpmbo.addItem("One");
cpmbo.addItem("Two");
cpmbo.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT).put(
KeyStroke.getKeyStroke(KeyEvent.VK_SPACE, KeyEvent.ALT_DOWN_MASK
| KeyEvent.CTRL_DOWN_MASK), "spacePopup");
this.add(cpmbo);
}
public static void main(String[] args) {
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.add(new Main());
f.pack();
f.setVisible(true);
}
}
【jcombobox】
