Keylistener in Javascript

Here’s an update for modern browsers in 2019 let playerSpriteX = 0; document.addEventListener(‘keyup’, (e) => { if (e.code === “ArrowUp”) playerSpriteX += 10 else if (e.code === “ArrowDown”) playerSpriteX -= 10 document.getElementById(‘test’).innerHTML = ‘playerSpriteX = ‘ + playerSpriteX; }); Click on this window to focus it, and hit keys up and down <br><br><br> <div id=”test”>playerSpriteX … Read more

How can I listen for key presses (within Java Swing) across all components?

It is possible. KeyboardFocusManager.getCurrentKeyboardFocusManager() .addKeyEventDispatcher(new KeyEventDispatcher() { @Override public boolean dispatchKeyEvent(KeyEvent e) { System.out.println(“Got key event!”); return false; } }); That will grab all key events. Returning false allows the keyboard focus manager to resume normal key event dispatching to the various components. If you want to catch key combos, you can keep a set … Read more

Key Listeners in python?

I was searching for a simple solution without window focus. Jayk’s answer, pynput, works perfect for me. Here is the example how I use it. from pynput import keyboard def on_press(key): if key == keyboard.Key.esc: return False # stop listener try: k = key.char # single-char keys except: k = key.name # other keys if … Read more

Allowing the “Enter” key to press the submit button, as opposed to only using MouseClick

There is a simple trick for this. After you constructed the frame with all it buttons do this: frame.getRootPane().setDefaultButton(submitButton); For each frame, you can set a default button that will automatically listen to the Enter key (and maybe some other event’s I’m not aware of). When you hit enter in that frame, the ActionListeners their … Read more

Unresponsive KeyListener for JFrame

If you don’t want to register a listener on every component, you could add your own KeyEventDispatcher to the KeyboardFocusManager: public class MyFrame extends JFrame { private class MyDispatcher implements KeyEventDispatcher { @Override public boolean dispatchKeyEvent(KeyEvent e) { if (e.getID() == KeyEvent.KEY_PRESSED) { System.out.println(“tester”); } else if (e.getID() == KeyEvent.KEY_RELEASED) { System.out.println(“2test2”); } else if … Read more

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