Java-是否检测到带有KeyBindings的按键? [英] Java - Detecting any key press with KeyBindings?
问题描述
我读到，使用KeyBindings比使用KeyListeners更好.我看到了KeyBindings如何对特定的键做出特定的反应.但是我也在尝试检测键盘上的ANY键的按下/释放:是否可以通过KeyBindings来做到这一点?
I read that it is better to use KeyBindings than KeyListeners. I see how KeyBindings are useful for a specific reaction to a specific key; but I am also trying to detect the press/release of ANY key on the keyboard: is there a way to do this with KeyBindings?
例如，我通常会使用KeyBindings这样对单个键进行操作:
For example, I would use KeyBindings normally to act on a single key as so:
InputMap iMap = component.getInputMap();
ActionMap aMap = component.getActionMap();
iMap.put(KeyStroke.getKeyStroke(KeyEvent.VK_ENTER, 0), "enter without modifiers");
aMap.put("enter without modifiers", new AbstractAction(){
public void actionPerformed(ActionEvent a){
System.out.println("Enter pressed alone");
});
因此，我正在考虑使用这种方法来检测任何按键:
So I am thinking something like this for detecting any key press:
iMap.put(KeyStroke.getKeyStroke(KeyEvent.KEY_PRESSED, 0), "any key was pressed");
aMap.put("any key was pressed", new AbstractAction(){
public void actionPerformed(ActionEvent a){
System.out.println("some key was pressed, regardless of which key...");
});
有没有办法做到这一点?
Is there a way to accomplish this?
还有，有没有办法用ANY修饰符组合来捕获它们的KeyBinding?例如.是否映射了Enter-action，而不管是否保留了修饰符，或者是否同时按住了ctrl-alt等组合在一起?
Also, is there a way to catch they KeyBinding with ANY modifiers combination? E.g. to have the Enter-action mapped regardless of if no modifiers are held, or if both ctrl-alt etc. in any combination are held?
非常感谢， 丹
推荐答案
我看到了KeyBindings如何对特定的键做出特定的反应；
I see how KeyBindings are useful for a specific reaction to a specific key;
是的，那就是您要使用按键绑定
Yes, that is when you would use key bindings
但是我还试图检测键盘上的ANY键的按下/释放:是否可以使用KeyBindings来做到这一点?
but I am also trying to detect the press/release of ANY key on the keyboard: is there a way to do this with KeyBindings?
不，键绑定不是用于此目的.
No, key bindings is not used for this purpose.
还有，有没有办法通过ANY修饰符组合来捕获它们的KeyBinding?
Also, is there a way to catch they KeyBinding with ANY modifiers combination?
否，同样，绑定是针对特定的KeyStroke的.因此，您将需要编写一种方法来为每个组合添加绑定.请注意，顺序无关紧要.那就是Shift + Alt与Alt + Shift相同
No, again bindings are for a specific KeyStroke. So you would need to write a method to add bindings for each combination. Note that order doesn't matter. That is Shift+Alt is the same as Alt+Shift
在大多数情况下，键绑定是首选方法.在您的情况下不是.
In most cases Key Bindings is the preferred approach. In your case it is not.
如果您正在侦听具有焦点的特定组件上的KeyEvent，则KeyListener可能是合适的.
A KeyListener may be appropriate if you are listening for KeyEvents on a specific component that has focus.
或者，如果您想更广泛地听取KeyEvent，则可以查看全局事件调度，具体取决于您的要求.
Or it you want to listen for KeyEvents on a more global basis then you can take a look at Global Event Listeners or maybe Global Event Dispatching depending on your exact requirement.
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