key-bindings

i am trying to write a calculator and having a problem. I already made a actionlistener for all buttons and now i want to make it possible to input data from keyboard. DO i need to do the whole thing for KeyListener or Keybinding or is there any other a way to make that after clicking a button it will be sent to the instructions in actionlistener? And whats better:Keylistener or Keybinding Generally speaking, where you have a limited set of key inputs, key bindings are a better choice. KeyListener suffers from issues related to focusability and with other controls in the GUI, focus will

I am a Python beginning self-learner, running on MacOS. I'm making a program with a text parser GUI in tkinter, where you type a command in a Entry widget, and hit a Button widget, which triggers my parse() funct, ect, printing the results to a Text widget, text-adventure style. > Circumvent the button I can't let you do that, Dave. I'm trying to find a way to get rid of the need to haul the mouse over to the Button every time the user issues a command, but this turned out harder than I thought. I'm guessing the correct code looks like self.bind('<Return>', self.parse()) ? But I don't even

I'm a Mac user and I've decided to learn Emacs. I've read that to reduce hand strain and improve accuracy the CTRL and CAPS LOCK keys should be swapped. How do I do this in Leopard? Also, in Terminal I have to use the ESC key to invoke meta. Is there any way to get the alt/option key to invoke meta instead? update: While the control key is much easier to hit now, the meta key is also used often enough that its position on my MacBook and Apple Keyboard also deserves attention. In fact, I find that the control key is actually easier to hit, so I've remapped my control key to act as a meta key.

I'm trying to put in a feature that I miss from Eclipse, where Alt +[ Up / Down ] transposes the lines up or down, but can not for the life of me figure out how to assign to these keys properly. I am using it in -nw mode (so just in a shell window), and typically run in a screen session. Using a global key binding, I can get it to work with letter combinations, like (kbd "M-m") , but every combination I have tried for the arrow keys just gives me a message that doesn't make sense, I always get: "ESC <up> is undefined" What I have tried: (global-set-key (kbd "M-<up>") 'transpose-line-up)

I have written a sample code using KeyListener in Java, I have created a JPanel , then set its focusable to true, I have created a KeyListener, requested a focus and then added the KeyListener to my panel. But the methods for the keyListener are never called. It seems although I have requested focus, it does not focus. Can anyone help? listener = new KeyLis(); this.setFocusable(true); this.requestFocus(); this.addKeyListener(listener); class KeyLis implements KeyListener{ @Override public void keyPressed(KeyEvent e) { currentver += 5; switch (e.getKeyCode()) { case KeyEvent.VK_LEFT : if