/* * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. * * Copyright 1997-2010 Oracle and/or its affiliates. All rights reserved. * * Oracle and Java are registered trademarks of Oracle and/or its affiliates. * Other names may be trademarks of their respective owners. * * The contents of this file are subject to the terms of either the GNU * General Public License Version 2 only ("GPL") or the Common * Development and Distribution License("CDDL") (collectively, the * "License"). You may not use this file except in compliance with the * License. You can obtain a copy of the License at * http://www.netbeans.org/cddl-gplv2.html * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the * specific language governing permissions and limitations under the * License. When distributing the software, include this License Header * Notice in each file and include the License file at * nbbuild/licenses/CDDL-GPL-2-CP. 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If you do not indicate a * single choice of license, a recipient has the option to distribute * your version of this file under either the CDDL, the GPL Version 2 or * to extend the choice of license to its licensees as provided above. * However, if you add GPL Version 2 code and therefore, elected the GPL * Version 2 license, then the option applies only if the new code is * made subject to such option by the copyright holder. */ package org.graalvm.visualvm.lib.ui.components; import java.awt.Component; import java.awt.event.ItemEvent; import javax.swing.ComboBoxModel; import javax.swing.DefaultComboBoxModel; import javax.swing.DefaultListCellRenderer; import javax.swing.JComboBox; import javax.swing.JList; import javax.swing.JSeparator; import javax.swing.SwingUtilities; /** * JComboBox which supports JSeparator inside its popup menu. * * @author Jiri Sedlacek */ public class JExtendedComboBox extends JComboBox { //~ Inner Classes ------------------------------------------------------------------------------------------------------------ private static class ExtendedComboListRenderer extends DefaultListCellRenderer { //~ Methods -------------------------------------------------------------------------------------------------------------- public Component getListCellRendererComponent(JList list, Object value, int index, boolean isSelected, boolean cellHasFocus) { if ((value != null) && value instanceof JSeparator) { return (JSeparator) value; } else { return super.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus); } } } //~ Instance fields ---------------------------------------------------------------------------------------------------------- private DefaultComboBoxModel model = new DefaultComboBoxModel(); private boolean closingWithSeparator = false; private int lastSelectedIndex = 0; //~ Constructors ------------------------------------------------------------------------------------------------------------- public JExtendedComboBox() { setModel(model); setRenderer(new ExtendedComboListRenderer()); } //~ Methods ------------------------------------------------------------------------------------------------------------------ public void setModel(ComboBoxModel aModel) { if (!(aModel instanceof DefaultComboBoxModel)) { throw new RuntimeException("Only DefaultComboBoxModel is supported for this component"); //NOI18N } model = (DefaultComboBoxModel) aModel; super.setModel(model); } public void firePopupMenuWillBecomeInvisible() { if (getSelectedItem() instanceof JSeparator) { closingWithSeparator = true; } super.firePopupMenuWillBecomeInvisible(); } protected void fireItemStateChanged(ItemEvent e) { switch (e.getStateChange()) { case ItemEvent.SELECTED: if (e.getItem() instanceof JSeparator) { SwingUtilities.invokeLater(new Runnable() { public void run() { selectNextItem(); } }); } break; case ItemEvent.DESELECTED: if (!(e.getItem() instanceof JSeparator)) { lastSelectedIndex = model.getIndexOf(e.getItem()); } break; } super.fireItemStateChanged(e); } private void selectNextItem() { int currentSelectedIndex = getSelectedIndex(); if (closingWithSeparator) { setSelectedIndex(lastSelectedIndex); closingWithSeparator = false; } else if (currentSelectedIndex > lastSelectedIndex) { setSelectedIndex(currentSelectedIndex + 1); } else { setSelectedIndex(currentSelectedIndex - 1); } } }