Is there a way to get keyboard events without JFrame?
Solution 1
This might do what you want. Note that this code is checking for a Ctr-F keystroke. I use this code to open up a find dialog from anything in the application. I'm pretty sure that the app has to have focus though. Something to try at least...
AWTEventListener listener = new AWTEventListener() {
@Override
public void eventDispatched(AWTEvent event) {
try {
KeyEvent evt = (KeyEvent)event;
if(evt.getID() == KeyEvent.KEY_PRESSED && evt.getModifiers() == KeyEvent.CTRL_MASK && evt.getKeyCode() == KeyEvent.VK_F) {
}
}
catch(Exception e) {
e.printStackTrace();
}
}
};
Toolkit.getDefaultToolkit().addAWTEventListener(listener, AWTEvent.KEY_EVENT_MASK);
EDIT: I think I understand what you want. Basically when the app does NOT have focus. If so then you'll probably have to hook into the OS events with a native API (JNI) but that forces you to a specific OS...
Solution 2
This might be useful. I'm not sure if there is one library that will work for Windows/Linux/Mac. For Windows you will need some external library that uses native code to create a keyboard hook. I have no idea how to do it on the other OSes.
Rogach
Updated on August 21, 2022Comments
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Rogach over 1 year
I want to get my program to unhide main window when user presses some shortcut. Is there a way to get the global key events, not only the ones which happened when focus was inside application frame?