StackOverflow2013

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POcapture key press within frame
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copied!<p>This seems like a simple behavior, but I'm having difficulty making it happen. I'm working on software which graphs data. I want to redraw the graph when the user hits enter. Well more accurately I want to draw the graph when the user hits enter and doesn't have a text field selected; but for now I'll be satisfied with drawing whenever the user hits enter.</p> <p>I tried installing a basic <code>KeyListener</code> to the frame first, but that doesn't work since the <code>JFrame</code> children, not the frame, receive the event.</p> <p>I then tried to use the <code>KeyEventDispatcher</code>, but it's proving too global a concept. I can have two graphs on screen at once, and an old graph can be closed or replaced with a new graph. With the <code>KeyEventDispatcher</code> I have no easy way of knowing which plot I want to activate out of the multiple plots open at a time and the plots currently open now may not be the plots that were opened when I instantiated the key dispatcher. I know this solution could still work, but it requires my storing extra data as to what plot is currently active that doesn't fit well into the program architecture.</p> <p>It seems as if there should be an easier method to capture any <code>KeyEvents</code> dispatched to a <code>JFrame/JPanel</code> or any of the <code>JFrame's</code> children; but ignore events dispatched to other frames. Preferable a method that can be added to the frame and thus is automatically disposed when the frame is disposed. Can anyone suggest a simpler method then what I've tried?</p>

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