如何在Java/Swing中实现Ctrl + Z/Command + Z? [英] How do I implement Ctrl+Z / Command+Z in Java/Swing?
本文介绍了如何在Java/Swing中实现Ctrl + Z/Command + Z?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
我正在研究一个需要撤消/重做功能的Java小程序.这是设置热键的代码(在Windows上很好用).
I'm working on a little Java applet that needs undo/redo functionality. Here's code to set up the hotkeys (works great on Windows).
我的问题是:如何在Mac上使用Command + Z?我应该只检查System.getProperty("os.name")还是有一个更优雅的选择??
My question is: how do I make it use command+Z on mac? Should I just check System.getProperty("os.name") or is there a more elegant alternative??
private void setupUndoHotkeys() {
String UNDO = "Undo action key";
String REDO = "Redo action key";
Action undoAction = new AbstractAction() {
public void actionPerformed(ActionEvent e) {
undo();
}
};
Action redoAction = new AbstractAction() {
public void actionPerformed(ActionEvent e) {
redo();
}
};
getActionMap().put(UNDO, undoAction);
getActionMap().put(REDO, redoAction);
InputMap[] inputMaps = new InputMap[] {
getInputMap(JComponent.WHEN_FOCUSED),
getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT),
getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW),
};
for(InputMap i : inputMaps) {
i.put(KeyStroke.getKeyStroke("control Z"), UNDO);
i.put(KeyStroke.getKeyStroke("control Y"), REDO);
}
}
谢谢
尼尔
推荐答案
Ah nevermind, I found it here http://www.devdaily.com/blog/post/jfc-swing/how-program-apple-command-key-keystroke-java-swing-mac-osx
在任何平台上都应该撤消该操作.
This should be undo on any platform.
KeyStroke.getKeyStroke(KeyEvent.VK_Z, Toolkit.getDefaultToolkit().getMenuShortcutKeyMask())
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