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POStopping JPopupMenu stealing the focus
 

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    <p>I have a <code>JTextField</code> for which I'm hoping to suggest results to match the user's input. I'm displaying these suggestions in a <code>JList</code> contained within a <code>JPopupMenu</code>.</p> <p><strong>However</strong>, when opening the popup menu programmatically via <a href="http://docs.oracle.com/javase/1.4.2/docs/api/javax/swing/JPopupMenu.html#show%28java.awt.Component,%20int,%20int%29" rel="noreferrer"><code>show(Component invoker, int x, int y)</code></a>, the focus is getting taken from the <code>JTextField</code>.</p> <p>Strangely enough, if I call <code>setVisible(true)</code> instead, the focus is not stolen; but then the <code>JPopupMenu</code> is not attached to any panel, and when minimizing the application whilst the box is open, it stays painted on the window.</p> <p>I've also tried to reset the focus to the <code>JTextField</code> using <code>requestFocus()</code>, but then I have to restore the caret position using <code>SwingUtilities.invokeLater()</code>, and the <em>invoke later</em> side of things is giving the user a slight margin to mess around with the existing contents / overwrite it / or do other unpredictable things.</p> <p>The code I've got is effectively:</p> <pre><code>JTextField field = new JTextField(); JPopupMenu menu = new JPopupMenu(); field.addKeyListener(new KeyAdapter() { public void keyTyped(KeyEvent e) { JList list = getAListOfResults(); menu.add(list); menu.show(field, 0, field.getHeight()); } }); </code></pre> <p>Can anyone suggest the best avenue to go down to show the <code>JPopupMenu</code> programmatically whilst preserving the focus on the <code>JTextField</code>?</p>
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