1 /*
2 * Copyright (c) 1997, 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 com.sun.java.swing.plaf.motif;
27
28 import java.awt.*;
29 import java.awt.event.*;
30 import javax.swing.JSplitPane;
31 import javax.swing.UIManager;
32 import javax.swing.plaf.basic.BasicSplitPaneUI;
33 import javax.swing.plaf.basic.BasicSplitPaneDivider;
34
35
36 /**
37 * Divider used for Motif split pane.
38 * <p>
39 * <strong>Warning:</strong>
40 * Serialized objects of this class will not be compatible with
41 * future Swing releases. The current serialization support is appropriate
42 * for short term storage or RMI between applications running the same
43 * version of Swing. A future release of Swing will provide support for
44 * long term persistence.
45 *
46 * @author Jeff Dinkins
47 */
48 @SuppressWarnings("serial") // Same-version serialization only
49 public class MotifSplitPaneDivider extends BasicSplitPaneDivider
50 {
51 /**
52 * Default cursor, supers is package private, so we have to have one
53 * too.
54 */
55 private static final Cursor defaultCursor =
56 Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR);
57
58
59 public static final int minimumThumbSize = 6;
60 public static final int defaultDividerSize = 18;
61
62 protected static final int pad = 6;
63
64 private int hThumbOffset = 30;
65 private int vThumbOffset = 40;
66 protected int hThumbWidth = 12;
67 protected int hThumbHeight = 18;
68 protected int vThumbWidth = 18;
69 protected int vThumbHeight = 12;
70
71 protected Color highlightColor;
72 protected Color shadowColor;
73 protected Color focusedColor;
74
75 /**
76 * Creates a new Motif SplitPaneDivider
77 */
78 public MotifSplitPaneDivider(BasicSplitPaneUI ui) {
79 super(ui);
80 highlightColor = UIManager.getColor("SplitPane.highlight");
81 shadowColor = UIManager.getColor("SplitPane.shadow");
82 focusedColor = UIManager.getColor("SplitPane.activeThumb");
83 setDividerSize(hThumbWidth + pad);
84 }
85
86 /**
87 * overrides to hardcode the size of the divider
88 * PENDING(jeff) - rewrite JSplitPane so that this ins't needed
89 */
90 public void setDividerSize(int newSize) {
91 Insets insets = getInsets();
92 int borderSize = 0;
93 if (getBasicSplitPaneUI().getOrientation() ==
94 JSplitPane.HORIZONTAL_SPLIT) {
95 if (insets != null) {
96 borderSize = insets.left + insets.right;
97 }
98 }
99 else if (insets != null) {
100 borderSize = insets.top + insets.bottom;
101 }
102 if (newSize < pad + minimumThumbSize + borderSize) {
103 setDividerSize(pad + minimumThumbSize + borderSize);
104 } else {
105 vThumbHeight = hThumbWidth = newSize - pad - borderSize;
106 super.setDividerSize(newSize);
107 }
108 }
109
110 /**
111 * Paints the divider.
112 */
113 // PENDING(jeff) - the thumb's location and size is currently hard coded.
114 // It should be dynamic.
115 public void paint(Graphics g) {
116 Color bgColor = getBackground();
117 Dimension size = getSize();
118
119 // fill
120 g.setColor(getBackground());
121 g.fillRect(0, 0, size.width, size.height);
122
123 if(getBasicSplitPaneUI().getOrientation() ==
124 JSplitPane.HORIZONTAL_SPLIT) {
125 int center = size.width/2;
126 int x = center - hThumbWidth/2;
127 int y = hThumbOffset;
128
129 // split line
130 g.setColor(shadowColor);
131 g.drawLine(center-1, 0, center-1, size.height);
132
133 g.setColor(highlightColor);
134 g.drawLine(center, 0, center, size.height);
135
136 // draw thumb
137 g.setColor((splitPane.hasFocus()) ? focusedColor :
138 getBackground());
139 g.fillRect(x+1, y+1, hThumbWidth-2, hThumbHeight-1);
140
141 g.setColor(highlightColor);
142 g.drawLine(x, y, x+hThumbWidth-1, y); // top
143 g.drawLine(x, y+1, x, y+hThumbHeight-1); // left
144
145 g.setColor(shadowColor);
146 g.drawLine(x+1, y+hThumbHeight-1,
147 x+hThumbWidth-1, y+hThumbHeight-1); // bottom
148 g.drawLine(x+hThumbWidth-1, y+1,
149 x+hThumbWidth-1, y+hThumbHeight-2); // right
150
151 } else {
152 int center = size.height/2;
153 int x = size.width - vThumbOffset;
154 int y = size.height/2 - vThumbHeight/2;
155
156 // split line
157 g.setColor(shadowColor);
158 g.drawLine(0, center-1, size.width, center-1);
159
160 g.setColor(highlightColor);
161 g.drawLine(0, center, size.width, center);
162
163 // draw thumb
164 g.setColor((splitPane.hasFocus()) ? focusedColor :
165 getBackground());
166 g.fillRect(x+1, y+1, vThumbWidth-1, vThumbHeight-1);
167
168 g.setColor(highlightColor);
169 g.drawLine(x, y, x+vThumbWidth, y); // top
170 g.drawLine(x, y+1, x, y+vThumbHeight); // left
171
172 g.setColor(shadowColor);
173 g.drawLine(x+1, y+vThumbHeight,
174 x+vThumbWidth, y+vThumbHeight); // bottom
175 g.drawLine(x+vThumbWidth, y+1,
176 x+vThumbWidth, y+vThumbHeight-1); // right
177 }
178 super.paint(g);
179
180 }
181
182 /**
183 * The minimums size is the same as the preferredSize
184 */
185 public Dimension getMinimumSize() {
186 return getPreferredSize();
187 }
188
189 /**
190 * Sets the SplitPaneUI that is using the receiver. This is completely
191 * overriden from super to create a different MouseHandler.
192 */
193 public void setBasicSplitPaneUI(BasicSplitPaneUI newUI) {
194 if (splitPane != null) {
195 splitPane.removePropertyChangeListener(this);
196 if (mouseHandler != null) {
197 splitPane.removeMouseListener(mouseHandler);
198 splitPane.removeMouseMotionListener(mouseHandler);
199 removeMouseListener(mouseHandler);
200 removeMouseMotionListener(mouseHandler);
201 mouseHandler = null;
202 }
203 }
204 splitPaneUI = newUI;
205 if (newUI != null) {
206 splitPane = newUI.getSplitPane();
207 if (splitPane != null) {
208 if (mouseHandler == null) mouseHandler=new MotifMouseHandler();
209 splitPane.addMouseListener(mouseHandler);
210 splitPane.addMouseMotionListener(mouseHandler);
211 addMouseListener(mouseHandler);
212 addMouseMotionListener(mouseHandler);
213 splitPane.addPropertyChangeListener(this);
214 if (splitPane.isOneTouchExpandable()) {
215 oneTouchExpandableChanged();
216 }
217 }
218 }
219 else {
220 splitPane = null;
221 }
222 }
223
224 /**
225 * Returns true if the point at <code>x</code>, <code>y</code>
226 * is inside the thumb.
227 */
228 private boolean isInThumb(int x, int y) {
229 Dimension size = getSize();
230 int thumbX;
231 int thumbY;
232 int thumbWidth;
233 int thumbHeight;
234
235 if (getBasicSplitPaneUI().getOrientation() ==
236 JSplitPane.HORIZONTAL_SPLIT) {
237 int center = size.width/2;
238 thumbX = center - hThumbWidth/2;
239 thumbY = hThumbOffset;
240 thumbWidth = hThumbWidth;
241 thumbHeight = hThumbHeight;
242 }
243 else {
244 int center = size.height/2;
245 thumbX = size.width - vThumbOffset;
246 thumbY = size.height/2 - vThumbHeight/2;
247 thumbWidth = vThumbWidth;
248 thumbHeight = vThumbHeight;
249 }
250 return (x >= thumbX && x < (thumbX + thumbWidth) &&
251 y >= thumbY && y < (thumbY + thumbHeight));
252 }
253
254 //
255 // Two methods are exposed so that MotifMouseHandler can see the
256 // superclass protected ivars
257 //
258
259 private DragController getDragger() {
260 return dragger;
261 }
262
263 private JSplitPane getSplitPane() {
264 return splitPane;
265 }
266
267
268 /**
269 * MouseHandler is subclassed to only pass off to super if the mouse
270 * is in the thumb. Motif only allows dragging when the thumb is clicked
271 * in.
272 */
273 private class MotifMouseHandler extends MouseHandler {
274 public void mousePressed(MouseEvent e) {
275 // Constrain the mouse pressed to the thumb.
276 if (e.getSource() == MotifSplitPaneDivider.this &&
277 getDragger() == null && getSplitPane().isEnabled() &&
278 isInThumb(e.getX(), e.getY())) {
279 super.mousePressed(e);
280 }
281 }
282
283 public void mouseMoved(MouseEvent e) {
284 if (getDragger() != null) {
285 return;
286 }
287 if (!isInThumb(e.getX(), e.getY())) {
288 if (getCursor() != defaultCursor) {
289 setCursor(defaultCursor);
290 }
291 return;
292 }
293 super.mouseMoved(e);
294 }
295 }
296 }