1 /*
2 * Copyright (c) 2002, 2014, 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 static final 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 @SuppressWarnings("deprecation")
47 public void preInit(XCreateWindowParams params) {
48 super.preInit(params);
49 Scrollbar target = (Scrollbar) this.target;
50 if (target.getOrientation() == Scrollbar.VERTICAL) {
51 tsb = new XVerticalScrollbar(this);
52 } else {
53 tsb = new XHorizontalScrollbar(this);
54 }
55 int min = target.getMinimum();
56 int max = target.getMaximum();
57 int vis = target.getVisibleAmount();
58 int val = target.getValue();
59 int line = target.getLineIncrement();
60 int page = target.getPageIncrement();
61 tsb.setValues(val, vis, min, max, line, page);
62 }
63
64 /**
65 * Create a scrollbar.
66 */
67 XScrollbarPeer(Scrollbar target) {
68 super(target);
69 this.target = target;
70 xSetVisible(true);
71 }
72
73 /**
74 * Returns default size of scrollbar on the platform
75 * Currently uses hardcoded values
76 */
77 private int getDefaultDimension() {
78 if (System.getProperty("os.name").equals("Linux")) {
79 return DEFAULT_WIDTH_LINUX;
80 } else {
81 return DEFAULT_WIDTH_SOLARIS;
82 }
83 }
84
85 /**
86 * Compute the minimum size for the scrollbar.
87 */
88 public Dimension getMinimumSize() {
89 Scrollbar sb = (Scrollbar)target;
90 return (sb.getOrientation() == Scrollbar.VERTICAL)
91 ? new Dimension(getDefaultDimension(), DEFAULT_LENGTH)
92 : new Dimension(DEFAULT_LENGTH, getDefaultDimension());
93 }
94 /**
95 * Paint the scrollbar.
96 */
97 @Override
98 void paintPeer(final Graphics g) {
99 final Color[] colors = getGUIcolors();
100 g.setColor(colors[BACKGROUND_COLOR]);
101 tsb.paint(g, colors, true);
102 // paint the whole scrollbar
103 }
104
105 public void repaintScrollbarRequest(XScrollbar sb) {
106 repaint();
107 }
108
109 /**
110 * The value has changed.
111 */
112 public void notifyValue(XScrollbar obj, int type, int value, boolean isAdjusting) {
113 Scrollbar sb = (Scrollbar)target;
114 sb.setValue(value);
115 postEvent( new AdjustmentEvent(sb, AdjustmentEvent.ADJUSTMENT_VALUE_CHANGED, type, value, isAdjusting));
116 }
117
118 /**
119 *
120 * @see java.awt.event.MouseEvent
121 * MouseEvent.MOUSE_CLICKED
122 * MouseEvent.MOUSE_PRESSED
123 * MouseEvent.MOUSE_RELEASED
124 * MouseEvent.MOUSE_MOVED
125 * MouseEvent.MOUSE_ENTERED
126 * MouseEvent.MOUSE_EXITED
127 * MouseEvent.MOUSE_DRAGGED
128 */
129 @SuppressWarnings("deprecation")
130 public void handleJavaMouseEvent( MouseEvent mouseEvent ) {
131 super.handleJavaMouseEvent(mouseEvent);
132
133 int x = mouseEvent.getX();
134 int y = mouseEvent.getY();
135 int modifiers = mouseEvent.getModifiers();
136 int id = mouseEvent.getID();
137
138
139 if ((mouseEvent.getModifiers() & InputEvent.BUTTON1_MASK) == 0) {
140 return;
141 }
142
143 switch (mouseEvent.getID()) {
144 case MouseEvent.MOUSE_PRESSED:
145 target.requestFocus();
146 tsb.handleMouseEvent(id, modifiers,x,y);
147 break;
148
149 case MouseEvent.MOUSE_RELEASED:
150 tsb.handleMouseEvent(id, modifiers,x,y);
151 break;
152
153 case MouseEvent.MOUSE_DRAGGED:
154 tsb.handleMouseEvent(id, modifiers,x,y);
155 break;
156 }
157 }
158
159 public void handleJavaKeyEvent(KeyEvent event) {
160 super.handleJavaKeyEvent(event);
161 if (log.isLoggable(PlatformLogger.Level.FINER)) {
162 log.finer("KeyEvent on scrollbar: " + event);
163 }
164 if (!(event.isConsumed()) && event.getID() == KeyEvent.KEY_RELEASED) {
165 switch(event.getKeyCode()) {
166 case KeyEvent.VK_UP:
167 log.finer("Scrolling up");
168 tsb.notifyValue(tsb.getValue() - tsb.getUnitIncrement());
169 break;
170 case KeyEvent.VK_DOWN:
171 log.finer("Scrolling down");
172 tsb.notifyValue(tsb.getValue() + tsb.getUnitIncrement());
173 break;
174 case KeyEvent.VK_LEFT:
175 log.finer("Scrolling up");
176 tsb.notifyValue(tsb.getValue() - tsb.getUnitIncrement());
177 break;
178 case KeyEvent.VK_RIGHT:
179 log.finer("Scrolling down");
180 tsb.notifyValue(tsb.getValue() + tsb.getUnitIncrement());
181 break;
182 case KeyEvent.VK_PAGE_UP:
183 log.finer("Scrolling page up");
184 tsb.notifyValue(tsb.getValue() - tsb.getBlockIncrement());
185 break;
186 case KeyEvent.VK_PAGE_DOWN:
187 log.finer("Scrolling page down");
188 tsb.notifyValue(tsb.getValue() + tsb.getBlockIncrement());
189 break;
190 case KeyEvent.VK_HOME:
191 log.finer("Scrolling to home");
192 tsb.notifyValue(0);
193 break;
194 case KeyEvent.VK_END:
195 log.finer("Scrolling to end");
196 tsb.notifyValue(tsb.getMaximum());
197 break;
198 }
199 }
200 }
201
202 public void setValue(int value) {
203 tsb.setValue(value);
204 repaint();
205 }
206
207 public void setValues(int value, int visible, int minimum, int maximum) {
208
209 tsb.setValues(value, visible, minimum, maximum);
210 repaint();
211 }
212
213 public void setLineIncrement(int l) {
214 tsb.setUnitIncrement(l);
215 }
216
217 public void setPageIncrement(int p) {
218 tsb.setBlockIncrement(p);
219 }
220
221 public void layout() {
222 super.layout();
223 tsb.setSize(width, height);
224 }
225 }