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1: /* JPanel.java -- 2: Copyright (C) 2002, 2004 Free Software Foundation, Inc. 3: 4: This file is part of GNU Classpath. 5: 6: GNU Classpath is free software; you can redistribute it and/or modify 7: it under the terms of the GNU General Public License as published by 8: the Free Software Foundation; either version 2, or (at your option) 9: any later version. 10: 11: GNU Classpath is distributed in the hope that it will be useful, but 12: WITHOUT ANY WARRANTY; without even the implied warranty of 13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14: General Public License for more details. 15: 16: You should have received a copy of the GNU General Public License 17: along with GNU Classpath; see the file COPYING. If not, write to the 18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 19: 02110-1301 USA. 20: 21: Linking this library statically or dynamically with other modules is 22: making a combined work based on this library. Thus, the terms and 23: conditions of the GNU General Public License cover the whole 24: combination. 25: 26: As a special exception, the copyright holders of this library give you 27: permission to link this library with independent modules to produce an 28: executable, regardless of the license terms of these independent 29: modules, and to copy and distribute the resulting executable under 30: terms of your choice, provided that you also meet, for each linked 31: independent module, the terms and conditions of the license of that 32: module. An independent module is a module which is not derived from 33: or based on this library. If you modify this library, you may extend 34: this exception to your version of the library, but you are not 35: obligated to do so. If you do not wish to do so, delete this 36: exception statement from your version. */ 37: 38: 39: package javax.swing; 40: 41: import java.awt.FlowLayout; 42: import java.awt.LayoutManager; 43: 44: import javax.accessibility.Accessible; 45: import javax.accessibility.AccessibleContext; 46: import javax.accessibility.AccessibleRole; 47: import javax.swing.plaf.PanelUI; 48: 49: /** 50: * An instance of JPanel can be added to a panel, frame etc 51: * 52: * @author Ronald Veldema (rveldema@cs.vu.nl) 53: */ 54: public class JPanel extends JComponent implements Accessible 55: { 56: /** 57: * Provides accessibility support for <code>JPanel</code>. 58: * 59: * @author Roman Kennke (roman@kennke.org) 60: */ 61: protected class AccessibleJPanel extends AccessibleJComponent 62: { 63: /** 64: * Creates a new instance of <code>AccessibleJPanel</code>. 65: */ 66: public AccessibleJPanel() 67: { 68: // Nothing to do here. 69: } 70: 71: /** 72: * Returns the accessible role for <code>JPanel</code>, which is 73: * {@link AccessibleRole#PANEL}. 74: * 75: * @return the accessible role for <code>JPanel</code> 76: */ 77: public AccessibleRole getAccessibleRole() 78: { 79: return AccessibleRole.PANEL; 80: } 81: } 82: 83: public JPanel() 84: { 85: this(new FlowLayout(), true); 86: } 87: 88: public JPanel(boolean double_buffered) 89: { 90: this(new FlowLayout(), double_buffered); 91: } 92: 93: public JPanel(LayoutManager layout) 94: { 95: this(layout, true); 96: } 97: 98: public JPanel(LayoutManager layout, boolean isDoubleBuffered) 99: { 100: if (layout == null) 101: { 102: // TODO: Is this correct? Or should we throw a NPE? 103: layout = new FlowLayout(); 104: } 105: setLayout(layout); 106: setOpaque(true); 107: 108: updateUI(); 109: } 110: 111: public String getUIClassID() 112: { 113: return "PanelUI"; 114: } 115: 116: public void setUI(PanelUI ui) 117: { 118: super.setUI(ui); 119: } 120: 121: public PanelUI getUI() 122: { 123: return (PanelUI) ui; 124: } 125: 126: public void updateUI() 127: { 128: setUI((PanelUI) UIManager.getUI(this)); 129: } 130: 131: public AccessibleContext getAccessibleContext() 132: { 133: if (accessibleContext == null) 134: accessibleContext = new AccessibleJPanel(); 135: return accessibleContext; 136: } 137: 138: protected String paramString() 139: { 140: return super.paramString(); 141: } 142: }
GNU Classpath (0.20) |