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 sun.util.logging.PlatformLogger;
32
33 class XScrollbarPeer extends XComponentPeer implements ScrollbarPeer, XScrollbarClient {
34 private final static PlatformLogger log = PlatformLogger.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 * Paint the scrollbar.
95 */
96 @Override
97 void paintPeer(final Graphics g) {
98 final Color[] colors = getGUIcolors();
99 g.setColor(colors[BACKGROUND_COLOR]);
100 tsb.paint(g, colors, true);
101 // paint the whole scrollbar
102 }
103
104 public void repaintScrollbarRequest(XScrollbar sb) {
105 repaint();
106 }
107
108 /**
109 * The value has changed.
110 */
111 public void notifyValue(XScrollbar obj, int type, int value, boolean isAdjusting) {
112 Scrollbar sb = (Scrollbar)target;
113 sb.setValue(value);
114 postEvent( new AdjustmentEvent(sb, AdjustmentEvent.ADJUSTMENT_VALUE_CHANGED, type, value, isAdjusting));
115 }
116
117 /**
118 *
119 * @see java.awt.event.MouseEvent
120 * MouseEvent.MOUSE_CLICKED
121 * MouseEvent.MOUSE_PRESSED
122 * MouseEvent.MOUSE_RELEASED
123 * MouseEvent.MOUSE_MOVED
124 * MouseEvent.MOUSE_ENTERED
125 * MouseEvent.MOUSE_EXITED
126 * MouseEvent.MOUSE_DRAGGED
127 */
128 public void handleJavaMouseEvent( MouseEvent mouseEvent ) {
129 super.handleJavaMouseEvent(mouseEvent);
130
131 int x = mouseEvent.getX();
132 int y = mouseEvent.getY();
133 int modifiers = mouseEvent.getModifiers();
134 int id = mouseEvent.getID();
135
136
137 if ((mouseEvent.getModifiers() & InputEvent.BUTTON1_MASK) == 0) {
138 return;
139 }
140
141 switch (mouseEvent.getID()) {
142 case MouseEvent.MOUSE_PRESSED:
143 target.requestFocus();
144 tsb.handleMouseEvent(id, modifiers,x,y);
145 break;
146
147 case MouseEvent.MOUSE_RELEASED:
148 tsb.handleMouseEvent(id, modifiers,x,y);
149 break;
150
151 case MouseEvent.MOUSE_DRAGGED:
152 tsb.handleMouseEvent(id, modifiers,x,y);
153 break;
154 }
155 }
156
157 public void handleJavaKeyEvent(KeyEvent event) {
158 super.handleJavaKeyEvent(event);
159 if (log.isLoggable(PlatformLogger.FINER)) {
160 log.finer("KeyEvent on scrollbar: " + event);
161 }
162 if (!(event.isConsumed()) && event.getID() == KeyEvent.KEY_RELEASED) {
163 switch(event.getKeyCode()) {
164 case KeyEvent.VK_UP:
165 log.finer("Scrolling up");
166 tsb.notifyValue(tsb.getValue() - tsb.getUnitIncrement());
167 break;
168 case KeyEvent.VK_DOWN:
169 log.finer("Scrolling down");
170 tsb.notifyValue(tsb.getValue() + tsb.getUnitIncrement());
171 break;
172 case KeyEvent.VK_LEFT:
173 log.finer("Scrolling up");
174 tsb.notifyValue(tsb.getValue() - tsb.getUnitIncrement());
175 break;
176 case KeyEvent.VK_RIGHT:
177 log.finer("Scrolling down");
178 tsb.notifyValue(tsb.getValue() + tsb.getUnitIncrement());
179 break;
180 case KeyEvent.VK_PAGE_UP:
181 log.finer("Scrolling page up");
182 tsb.notifyValue(tsb.getValue() - tsb.getBlockIncrement());
183 break;
184 case KeyEvent.VK_PAGE_DOWN:
185 log.finer("Scrolling page down");
186 tsb.notifyValue(tsb.getValue() + tsb.getBlockIncrement());
187 break;
188 case KeyEvent.VK_HOME:
189 log.finer("Scrolling to home");
190 tsb.notifyValue(0);
191 break;
192 case KeyEvent.VK_END:
193 log.finer("Scrolling to end");
194 tsb.notifyValue(tsb.getMaximum());
195 break;
196 }
197 }
198 }
199
200 public void setValue(int value) {
201 tsb.setValue(value);
202 repaint();
203 }
204
205 public void setValues(int value, int visible, int minimum, int maximum) {
206
207 tsb.setValues(value, visible, minimum, maximum);
208 repaint();
209 }
210
211 public void setLineIncrement(int l) {
212 tsb.setUnitIncrement(l);
213 }
214
215 public void setPageIncrement(int p) {
216 tsb.setBlockIncrement(p);
217 }
218
219 public void layout() {
220 super.layout();
221 tsb.setSize(width, height);
222 }
223 }