1 /* 2 * Copyright (c) 1997, 2005, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package com.sun.java.swing.plaf.motif; 27 28 import sun.swing.SwingUtilities2; 29 import javax.swing.*; 30 import javax.swing.event.*; 31 import javax.swing.border.*; 32 import java.awt.Color; 33 import java.awt.Component; 34 import java.awt.Container; 35 import java.awt.Dimension; 36 import java.awt.Font; 37 import java.awt.FontMetrics; 38 import java.awt.Frame; 39 import java.awt.Graphics; 40 import java.awt.Insets; 41 import java.awt.LayoutManager; 42 import java.awt.Point; 43 import java.awt.Rectangle; 44 import java.awt.event.*; 45 import javax.swing.plaf.*; 46 import javax.swing.plaf.basic.BasicPopupMenuUI; 47 48 49 /** 50 * A Motif {@literal L&F} implementation of PopupMenuUI. 51 * <p> 52 * <strong>Warning:</strong> 53 * Serialized objects of this class will not be compatible with 54 * future Swing releases. The current serialization support is appropriate 55 * for short term storage or RMI between applications running the same 56 * version of Swing. A future release of Swing will provide support for 57 * long term persistence. 58 * 59 * @author Georges Saab 60 * @author Rich Schiavi 61 */ 62 public class MotifPopupMenuUI extends BasicPopupMenuUI { 63 private static Border border = null; 64 private Font titleFont = null; 65 66 public static ComponentUI createUI(JComponent x) { 67 return new MotifPopupMenuUI(); 68 } 69 70 /* This has to deal with the fact that the title may be wider than 71 the widest child component. 72 */ 73 public Dimension getPreferredSize(JComponent c) { 74 LayoutManager layout = c.getLayout(); 75 Dimension d = layout.preferredLayoutSize(c); 76 String title = ((JPopupMenu)c).getLabel(); 77 if (titleFont == null) { 78 UIDefaults table = UIManager.getLookAndFeelDefaults(); 79 titleFont = table.getFont("PopupMenu.font"); 80 } 81 FontMetrics fm = c.getFontMetrics(titleFont); 82 int stringWidth = 0; 83 84 if (title!=null) { 85 stringWidth += SwingUtilities2.stringWidth(c, fm, title); 86 } 87 88 if (d.width < stringWidth) { 89 d.width = stringWidth + 8; 90 Insets i = c.getInsets(); 91 if (i!=null) { 92 d.width += i.left + i.right; 93 } 94 if (border != null) { 95 i = border.getBorderInsets(c); 96 d.width += i.left + i.right; 97 } 98 99 return d; 100 } 101 return null; 102 } 103 104 protected ChangeListener createChangeListener(JPopupMenu m) { 105 return new ChangeListener() { 106 public void stateChanged(ChangeEvent e) {} 107 }; 108 } 109 110 public boolean isPopupTrigger(MouseEvent e) { 111 return ((e.getID()==MouseEvent.MOUSE_PRESSED) 112 && ((e.getModifiers() & MouseEvent.BUTTON3_MASK)!=0)); 113 } 114 }