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Catch KeyDown events for modifier keys

843807
Member Posts: 46,582
I need to be able to tell when a user presses or releases the CTRL key for my application, but I can't get KeyListeners to work and the key bindings only appear to work with releasing the key. I also have key bindings for CTRL key combinations (like CTRL-N, CTRL-S, etc.), but I need an event which is fired when the user first presses the CTRL key. The goal is to have a tooltip on my custom JPanel which pops up when I press CTRL and goes away when I release it.
My (broken) key binding code:
My (broken) key binding code:
JPanel main=new JPanel(); InputMap im=main.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW); im.put(KeyStroke.getKeyStroke("pressed CONTROL"), "cDown"); im.put(KeyStroke.getKeyStroke("released CONTROL"), "cUp"); main.getActionMap().put("cDown",new AbstractAction() { public void actionPerformed(ActionEvent e) { isCtrlDown=true; updateTooltip(); System.out.println("down"); } }); main.getActionMap().put("cUp",new AbstractAction() { public void actionPerformed(ActionEvent e) { isCtrlDown=false; updateTooltip(); System.out.println("up"); } });If you press the control key a few times over this component, you only get "up" printed.
This discussion has been closed.