[英]java swing shortcut key / key bindings in a JPanel
I have a JPanel with lots of components in it. 我有一个JPanel,里面有很多组件。 When the user presses "a", I want to do something and consume the "a", EXCEPT if the user is in a textbox (or other part of the screen that accepts "a")--in that case, I don't want to know about the "a".
当用户按下“a”时,我想做某事并使用“a”,除非用户在文本框中(或接受“a”的屏幕的其他部分) - 在这种情况下,我不喜欢我想知道“一个”。
In the code below, I get notified of the "a", even if the focus is on a text box (typing "a" while in the textbox puts the "a" in the textbox and also notifies me about the "a"). 在下面的代码中,我收到“a”的通知,即使焦点在文本框上(在文本框中键入“a”,将“a”放在文本框中,并通知我“a”) 。
JComponent jc = the panel...;
InputMap inputMap = jc.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT);
ActionMap actionMap = jc.getActionMap();
inputMap.put(KeyStroke.getKeyStroke(KeyEvent.VK_A, 0), "qcAccept");
actionMap.put("qcAccept", new AbstractAction("qcAccept") {
@Override
public void actionPerformed(ActionEvent e) {
System.out.println("A pressed, " + e);
}
});
inputMap.put(KeyStroke.getKeyStroke(KeyEvent.VK_A, 0), "qcAccept");
You are listening for the keyPressed event. 您正在侦听keyPressed事件。 Text components listen for the keyTyped event.
文本组件侦听keyTyped事件。 So that is why both bindings are still working.
这就是为什么两个绑定仍然有效。 Try:
尝试:
inputMap.put(KeyStroke.getKeyStroke("typed a"), "qcAccept");
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