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1: /* MetalScrollPaneUI.java 2: Copyright (C) 2005 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.plaf.metal; 40: 41: import java.beans.PropertyChangeListener; 42: 43: import javax.swing.JComponent; 44: import javax.swing.JScrollBar; 45: import javax.swing.JScrollPane; 46: import javax.swing.plaf.ComponentUI; 47: import javax.swing.plaf.basic.BasicScrollPaneUI; 48: 49: /** 50: * A UI delegate for the {@link JScrollPane} component. 51: */ 52: public class MetalScrollPaneUI 53: extends BasicScrollPaneUI 54: { 55: /** 56: * Constructs a new instance of <code>MetalScrollPaneUI</code>. 57: */ 58: public MetalScrollPaneUI() 59: { 60: super(); 61: } 62: 63: /** 64: * Returns a shared instance of <code>MetalScrollPaneUI</code>. 65: * 66: * @param component the component for which we return an UI instance 67: * 68: * @return A shared instance of <code>MetalScrollPaneUI</code>. 69: */ 70: public static ComponentUI createUI(JComponent component) 71: { 72: return new MetalScrollPaneUI(); 73: } 74: 75: /** 76: * Configures the specified component appropriate for the look and feel. 77: * This method is invoked when the ComponentUI instance is being installed 78: * as the UI delegate on the specified component. This method should 79: * completely configure the component for the look and feel, 80: * including the following: 81: * 1. Install any default property values for color, fonts, borders, 82: * icons, opacity, etc. on the component. Whenever possible, property 83: * values initialized by the client program should not be overridden. 84: * 2. Install a LayoutManager on the component if necessary. 85: * 3. Create/add any required sub-components to the component. 86: * 4. Create/install event listeners on the component. 87: * 5. Create/install a PropertyChangeListener on the component in order 88: * to detect and respond to component property changes appropriately. 89: * 6. Install keyboard UI (mnemonics, traversal, etc.) on the component. 90: * 7. Initialize any appropriate instance data. 91: * 92: * @param c - the component to install the ui on 93: */ 94: public void installUI(JComponent c) 95: { 96: super.installUI(c); 97: JScrollBar hsb = scrollpane.getHorizontalScrollBar(); 98: hsb.putClientProperty(MetalScrollBarUI.FREE_STANDING_PROP, Boolean.FALSE); 99: JScrollBar vsb = scrollpane.getVerticalScrollBar(); 100: vsb.putClientProperty(MetalScrollBarUI.FREE_STANDING_PROP, Boolean.FALSE); 101: } 102: 103: /** 104: * Reverses configuration which was done on the specified component 105: * during installUI. This method is invoked when this UIComponent 106: * instance is being removed as the UI delegate for the specified 107: * component. This method should undo the configuration performed in 108: * installUI, being careful to leave the JComponent instance in a 109: * clean state (no extraneous listeners, look-and-feel-specific property 110: * objects, etc.). This should include the following: 111: * 1. Remove any UI-set borders from the component. 112: * 2. Remove any UI-set layout managers on the component. 113: * 3. Remove any UI-added sub-components from the component. 114: * 4. Remove any UI-added event/property listeners from the component. 115: * 5. Remove any UI-installed keyboard UI from the component. 116: * 6. Nullify any allocated instance data objects to allow for GC. 117: * 118: * @param c - the component to uninstall the ui on 119: */ 120: public void uninstallUI(JComponent c) 121: { 122: JScrollBar hsb = scrollpane.getHorizontalScrollBar(); 123: hsb.putClientProperty(MetalScrollBarUI.FREE_STANDING_PROP, null); 124: JScrollBar vsb = scrollpane.getVerticalScrollBar(); 125: vsb.putClientProperty(MetalScrollBarUI.FREE_STANDING_PROP, null); 126: super.uninstallUI(c); 127: } 128: 129: /** 130: * Installs listeners on scrollPane 131: * 132: * @param scrollPane - the component to install the listeners on 133: */ 134: public void installListeners(JScrollPane scrollPane) 135: { 136: super.installListeners(scrollPane); 137: } 138: 139: /** 140: * Uninstalls listeners on scrollPane 141: * 142: * @param scrollPane - the component to uninstall the listeners on 143: */ 144: public void uninstallListeners(JScrollPane scrollPane) 145: { 146: super.uninstallListeners(scrollPane); 147: } 148: 149: /** 150: * TODO 151: * 152: * @return TODO 153: */ 154: protected PropertyChangeListener createScrollBarSwapListener() 155: { 156: // FIXME: Anything else to do here? 157: return super.createPropertyChangeListener(); 158: } 159: }