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1: /* ======================================================================== 2: * JCommon : a free general purpose class library for the Java(tm) platform 3: * ======================================================================== 4: * 5: * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors. 6: * 7: * Project Info: http://www.jfree.org/jcommon/index.html 8: * 9: * This library is free software; you can redistribute it and/or modify it 10: * under the terms of the GNU Lesser General Public License as published by 11: * the Free Software Foundation; either version 2.1 of the License, or 12: * (at your option) any later version. 13: * 14: * This library is distributed in the hope that it will be useful, but 15: * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 16: * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 17: * License for more details. 18: * 19: * You should have received a copy of the GNU Lesser General Public 20: * License along with this library; if not, write to the Free Software 21: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 22: * USA. 23: * 24: * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 25: * in the United States and other countries.] 26: * 27: * -------------- 28: * RootPanel.java 29: * -------------- 30: * (C)opyright 2004, by Thomas Morgner and Contributors. 31: * 32: * Original Author: Thomas Morgner; 33: * Contributor(s): David Gilbert (for Object Refinery Limited); 34: * 35: * $Id: RootPanel.java,v 1.4 2005/10/18 13:23:37 mungady Exp $ 36: * 37: * Changes 38: * ------------------------- 39: * 16.02.2004 : Initial version 40: * 41: */ 42: 43: package org.jfree.ui.tabbedui; 44: 45: import javax.swing.JComponent; 46: 47: /** 48: * A root panel is a panel implementation of an root editor. 49: * 50: * @author Thomas Morgner 51: */ 52: public abstract class RootPanel extends JComponent implements RootEditor { 53: 54: /**a flag indicating whether this editor is the currently active editor. */ 55: private boolean active; 56: 57: /** 58: * Default constructor. 59: */ 60: public RootPanel() { 61: // nothing required. 62: } 63: 64: /** 65: * Returns a flag that indicates whether the panel is active or not. 66: * 67: * @return A flag. 68: */ 69: public final boolean isActive() { 70: return this.active; 71: } 72: 73: /** 74: * Called when the panel is activated. 75: */ 76: protected void panelActivated() 77: { 78: } 79: 80: /** 81: * Called when the panel is deactivated. 82: */ 83: protected void panelDeactivated() 84: { 85: } 86: 87: /** 88: * Sets the status of the panel to active or inactive. 89: * 90: * @param active the flag. 91: */ 92: public final void setActive(final boolean active) { 93: if (this.active == active) { 94: return; 95: } 96: this.active = active; 97: if (active) { 98: panelActivated(); 99: } 100: else { 101: panelDeactivated(); 102: } 103: } 104: 105: /** 106: * Returns the main panel. Returns the self reference, as this panel 107: * implements all necessary methods. 108: * 109: * @return The main panel. 110: */ 111: public JComponent getMainPanel() { 112: return this; 113: } 114: 115: /** 116: * Returns the toolbar. This default implementation return null, to indicate 117: * that no toolbar is used. 118: * 119: * @return The toolbar. 120: */ 121: public JComponent getToolbar() { 122: return null; 123: } 124: 125: 126: }