1 /* 2 * Copyright (c) 2002, 2006, 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 sun.awt.X11; 27 28 import java.awt.*; 29 import java.awt.event.*; 30 import java.awt.peer.*; 31 import java.util.logging.*; 32 33 class XScrollbarPeer extends XComponentPeer implements ScrollbarPeer, XScrollbarClient { 34 private final static Logger log = Logger.getLogger("sun.awt.X11.XScrollbarPeer"); 35 36 private static final int DEFAULT_LENGTH = 50; 37 private static final int DEFAULT_WIDTH_SOLARIS = 19; 38 private static final int DEFAULT_WIDTH_LINUX; 39 40 XScrollbar tsb; 41 42 static { 43 DEFAULT_WIDTH_LINUX = XToolkit.getUIDefaults().getInt("ScrollBar.defaultWidth"); 44 } 45 46 public void preInit(XCreateWindowParams params) { 47 super.preInit(params); 48 Scrollbar target = (Scrollbar) this.target; 49 if (target.getOrientation() == Scrollbar.VERTICAL) { 50 tsb = new XVerticalScrollbar(this); 51 } else { 52 tsb = new XHorizontalScrollbar(this); 53 } 54 int min = target.getMinimum(); 55 int max = target.getMaximum(); 56 int vis = target.getVisibleAmount(); 57 int val = target.getValue(); 58 int line = target.getLineIncrement(); 59 int page = target.getPageIncrement(); 60 tsb.setValues(val, vis, min, max, line, page); 61 } 62 63 /** 64 * Create a scrollbar. 65 */ 66 XScrollbarPeer(Scrollbar target) { 67 super(target); 68 this.target = target; 69 xSetVisible(true); 70 } 71 72 /** 73 * Returns default size of scrollbar on the platform 74 * Currently uses hardcoded values 75 */ 76 private int getDefaultDimension() { 77 if (System.getProperty("os.name").equals("Linux")) { 78 return DEFAULT_WIDTH_LINUX; 79 } else { 80 return DEFAULT_WIDTH_SOLARIS; 81 } 82 } 83 84 /** 85 * Compute the minimum size for the scrollbar. 86 */ 87 public Dimension getMinimumSize() { 88 Scrollbar sb = (Scrollbar)target; 89 return (sb.getOrientation() == Scrollbar.VERTICAL) 90 ? new Dimension(getDefaultDimension(), DEFAULT_LENGTH) 91 : new Dimension(DEFAULT_LENGTH, getDefaultDimension()); 92 } 93 94 public void repaint() { 95 Graphics g = getGraphics(); 96 if (g != null) paint(g); 97 } 98 99 /** 100 * Paint the scrollbar. 101 */ 102 public void paint(Graphics g) { 103 Scrollbar sb = (Scrollbar)target; 104 Color colors[] = getGUIcolors(); 105 g.setColor(colors[BACKGROUND_COLOR]); 106 tsb.paint(g, colors, true); 107 // paint the whole scrollbar 108 } 109 110 public void repaintScrollbarRequest(XScrollbar sb) { 111 repaint(); 112 } 113 114 /** 115 * The value has changed. 116 */ 117 public void notifyValue(XScrollbar obj, int type, int value, boolean isAdjusting) { 118 Scrollbar sb = (Scrollbar)target; 119 sb.setValue(value); 120 postEvent( new AdjustmentEvent(sb, AdjustmentEvent.ADJUSTMENT_VALUE_CHANGED, type, value, isAdjusting)); 121 } 122 123 /** 124 * 125 * @see java.awt.event.MouseEvent 126 * MouseEvent.MOUSE_CLICKED 127 * MouseEvent.MOUSE_PRESSED 128 * MouseEvent.MOUSE_RELEASED 129 * MouseEvent.MOUSE_MOVED 130 * MouseEvent.MOUSE_ENTERED 131 * MouseEvent.MOUSE_EXITED 132 * MouseEvent.MOUSE_DRAGGED 133 */ 134 public void handleJavaMouseEvent( MouseEvent mouseEvent ) { 135 super.handleJavaMouseEvent(mouseEvent); 136 137 int x = mouseEvent.getX(); 138 int y = mouseEvent.getY(); 139 int modifiers = mouseEvent.getModifiers(); 140 int id = mouseEvent.getID(); 141 142 143 if ((mouseEvent.getModifiers() & InputEvent.BUTTON1_MASK) == 0) { 144 return; 145 } 146 147 switch (mouseEvent.getID()) { 148 case MouseEvent.MOUSE_PRESSED: 149 target.requestFocus(); 150 tsb.handleMouseEvent(id, modifiers,x,y); 151 break; 152 153 case MouseEvent.MOUSE_RELEASED: 154 tsb.handleMouseEvent(id, modifiers,x,y); 155 break; 156 157 case MouseEvent.MOUSE_DRAGGED: 158 tsb.handleMouseEvent(id, modifiers,x,y); 159 break; 160 } 161 } 162 163 public void handleJavaKeyEvent(KeyEvent event) { 164 super.handleJavaKeyEvent(event); 165 if (log.isLoggable(Level.FINEST)) log.finer("KeyEvent on scrollbar: " + event); 166 if (!(event.isConsumed()) && event.getID() == KeyEvent.KEY_RELEASED) { 167 switch(event.getKeyCode()) { 168 case KeyEvent.VK_UP: 169 log.finer("Scrolling up"); 170 tsb.notifyValue(tsb.getValue() - tsb.getUnitIncrement()); 171 break; 172 case KeyEvent.VK_DOWN: 173 log.finer("Scrolling down"); 174 tsb.notifyValue(tsb.getValue() + tsb.getUnitIncrement()); 175 break; 176 case KeyEvent.VK_LEFT: 177 log.finer("Scrolling up"); 178 tsb.notifyValue(tsb.getValue() - tsb.getUnitIncrement()); 179 break; 180 case KeyEvent.VK_RIGHT: 181 log.finer("Scrolling down"); 182 tsb.notifyValue(tsb.getValue() + tsb.getUnitIncrement()); 183 break; 184 case KeyEvent.VK_PAGE_UP: 185 log.finer("Scrolling page up"); 186 tsb.notifyValue(tsb.getValue() - tsb.getBlockIncrement()); 187 break; 188 case KeyEvent.VK_PAGE_DOWN: 189 log.finer("Scrolling page down"); 190 tsb.notifyValue(tsb.getValue() + tsb.getBlockIncrement()); 191 break; 192 case KeyEvent.VK_HOME: 193 log.finer("Scrolling to home"); 194 tsb.notifyValue(0); 195 break; 196 case KeyEvent.VK_END: 197 log.finer("Scrolling to end"); 198 tsb.notifyValue(tsb.getMaximum()); 199 break; 200 } 201 } 202 } 203 204 public void setValue(int value) { 205 tsb.setValue(value); 206 repaint(); 207 } 208 209 public void setValues(int value, int visible, int minimum, int maximum) { 210 211 tsb.setValues(value, visible, minimum, maximum); 212 repaint(); 213 } 214 215 public void setLineIncrement(int l) { 216 tsb.setUnitIncrement(l); 217 } 218 219 public void setPageIncrement(int p) { 220 tsb.setBlockIncrement(p); 221 } 222 223 public void layout() { 224 super.layout(); 225 tsb.setSize(width, height); 226 } 227 }