我正在编写一个简单的游戏，我在 CardLayout 中放置了带有 4 个 JPanel 的主框架。 主框架看起来像这样:
private static JPanel[] panele = new JPanel[4];
private static JPanel panel;
public GameWindow()
{
super("Sokoban");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLayout(new BorderLayout());
panele[0] = new MainMenu();
panele[1] = new LoadGameMenu();
panele[2] = new SaveGameMenu();
panele[3] = new GameScene();
panel = new JPanel(new CardLayout());
//((MainMenu)panele[0]).setSaveOptionState(false);
panel.add(panele[0], "MainMenu");
panel.add(panele[1], "LoadGameMenu");
panel.add(panele[2], "SaveGameMenu");
panel.add(panele[3], "GameScene");
add(panel, BorderLayout.CENTER);
}
GameScene 面板对键盘输入有反应。首先我尝试了 keylistener:
public GameScene() {
setFocusable(true);
initWorld(); //Drawing on JPanel takes place here
addKeyListener(new Keyboard());
}
class Keyboard extends KeyAdapter
{
private int key;
public void keyPressed(KeyEvent event)
{
System.out.println("Tu jestem");
key = event.getKeyCode();
if(key == KeyEvent.VK_ESCAPE)
{
Game.gra = new GameWindow(MenuAction.MAIN_MENU);
System.out.println("Escape");
}
那行不通...所以我尝试了键绑定(bind)(简单实现):
public GameScene() {
setFocusable(true);
initWorld(); //Drawing on JPanel takes place here
// requestFocus();
setInputMap(WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, getInputMap());
KeyStroke key = KeyStroke.getKeyStroke(KeyEvent.VK_ESCAPE, 0);
getInputMap().put(key, "pressed");
getActionMap().put("pressed", new AbstractAction(){
public void actionPerformed(ActionEvent arg0) {
System.out.println("Spacja");
//Game.gra = new GameWindow(MenuAction.MAIN_MENU);
}
});
}
它仍然不起作用...我尝试添加 requestFocus 和 requestFocusInWindow() 但没有效果。有什么想法可以修复或执行吗？
已找到解决方案。在键绑定(bind)中我应该写:
getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(key, "pressed");
代替:
getInputMap().put(key, "pressed");
最佳答案
试试这个:
setInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW, getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW));
编辑:reference , "每个 JComponent 都有一个 Action 图和三个输入图。"
关于java - 将 keylistener 添加到 CardLayout 中的面板，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/10675758/