1 /*
2 * Copyright (c) 2011, 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.apple.laf;
27
28 import java.awt.*;
29 import java.beans.PropertyChangeEvent;
30
31 import javax.swing.*;
32 import javax.swing.border.Border;
33 import javax.swing.plaf.basic.BasicSplitPaneDivider;
34
35 import apple.laf.*;
36 import apple.laf.JRSUIConstants.State;
37
38 import com.apple.laf.AquaUtils.LazyKeyedSingleton;
39 import com.apple.laf.AquaUtils.RecyclableSingleton;
40 import com.apple.laf.AquaUtils.RecyclableSingletonFromDefaultConstructor;
41
42 @SuppressWarnings("serial") // Superclass is not serializable across versions
43 public class AquaSplitPaneDividerUI extends BasicSplitPaneDivider {
44 final AquaPainter<JRSUIState> painter = AquaPainter.create(JRSUIStateFactory.getSplitPaneDivider());
45
46 public AquaSplitPaneDividerUI(final AquaSplitPaneUI ui) {
47 super(ui);
48 setLayout(new AquaSplitPaneDividerUI.DividerLayout());
49 }
50
51 /**
52 * Property change event, presumably from the JSplitPane, will message
53 * updateOrientation if necessary.
54 */
55 public void propertyChange(final PropertyChangeEvent e) {
56 if (e.getSource() == splitPane) {
57 final String propName = e.getPropertyName();
58 if ("enabled".equals(propName)) {
59 final boolean enabled = splitPane.isEnabled();
60 if (leftButton != null) leftButton.setEnabled(enabled);
61 if (rightButton != null) rightButton.setEnabled(enabled);
62 } else if (JSplitPane.ORIENTATION_PROPERTY.equals(propName)) {
63 // need to regenerate the buttons, since we bake the orientation into them
64 if (rightButton != null) {
65 remove(rightButton); rightButton = null;
66 }
67 if (leftButton != null) {
68 remove(leftButton); leftButton = null;
69 }
70 oneTouchExpandableChanged();
71 }
72 }
73 super.propertyChange(e);
74 }
75
76 public int getMaxDividerSize() {
77 return 10;
78 }
79
80 /**
81 * Paints the divider.
82 */
83 public void paint(final Graphics g) {
84 final Dimension size = getSize();
85 int x = 0;
86 int y = 0;
87
88 final boolean horizontal = splitPane.getOrientation() == SwingConstants.HORIZONTAL;
89 //System.err.println("Size = " + size + " orientation horiz = " + horizontal);
90 // size determines orientation
91 final int maxSize = getMaxDividerSize();
92 boolean doPaint = true;
93 if (horizontal) {
94 if (size.height > maxSize) {
95 final int diff = size.height - maxSize;
96 y = diff / 2;
97 size.height = maxSize;
98 }
99 if (size.height < 4) doPaint = false;
100 } else {
101 if (size.width > maxSize) {
102 final int diff = size.width - maxSize;
103 x = diff / 2;
104 size.width = maxSize;
105 }
106 if (size.width < 4) doPaint = false;
107 }
108
109 if (doPaint) {
110 painter.state.set(getState());
111 painter.paint(g, splitPane, x, y, size.width, size.height);
112 }
113
114 super.paint(g); // Ends up at Container.paint, which paints our JButton children
115 }
116
117 protected State getState() {
118 return splitPane.isEnabled() ? State.ACTIVE : State.DISABLED;
119 }
120
121 protected JButton createLeftOneTouchButton() {
122 return createButtonForDirection(getDirection(true));
123 }
124
125 protected JButton createRightOneTouchButton() {
126 return createButtonForDirection(getDirection(false));
127 }
128
129 static final LazyKeyedSingleton<Integer, Image> directionArrows = new LazyKeyedSingleton<Integer, Image>() {
130 protected Image getInstance(final Integer direction) {
131 final Image arrowImage = AquaImageFactory.getArrowImageForDirection(direction);
132 final int h = (arrowImage.getHeight(null) * 5) / 7;
133 final int w = (arrowImage.getWidth(null) * 5) / 7;
134 return AquaUtils.generateLightenedImage(arrowImage.getScaledInstance(w, h, Image.SCALE_SMOOTH), 50);
135 }
136 };
137
138 // separate static, because the divider needs to be serializable
139 // see <rdar://problem/7590946> JSplitPane is not serializable when using Aqua look and feel
140 static JButton createButtonForDirection(final int direction) {
141 final JButton button = new JButton(new ImageIcon(directionArrows.get(Integer.valueOf(direction))));
142 button.setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
143 button.setFocusPainted(false);
144 button.setRequestFocusEnabled(false);
145 button.setFocusable(false);
146 button.setBorder(BorderFactory.createEmptyBorder(1, 1, 1, 1));
147 return button;
148 }
149
150 int getDirection(final boolean isLeft) {
151 if (splitPane.getOrientation() == JSplitPane.HORIZONTAL_SPLIT) {
152 return isLeft ? SwingConstants.WEST : SwingConstants.EAST;
153 }
154
155 return isLeft ? SwingConstants.NORTH : SwingConstants.SOUTH;
156 }
157
158 static final int kMaxPopupArrowSize = 9;
159 protected class DividerLayout extends BasicSplitPaneDivider.DividerLayout {
160 public void layoutContainer(final Container c) {
161 final int maxSize = getMaxDividerSize();
162 final Dimension size = getSize();
163
164 if (leftButton == null || rightButton == null || c != AquaSplitPaneDividerUI.this) return;
165
166 if (!splitPane.isOneTouchExpandable()) {
167 leftButton.setBounds(-5, -5, 1, 1);
168 rightButton.setBounds(-5, -5, 1, 1);
169 return;
170 }
171
172 final int blockSize = Math.min(getDividerSize(), kMaxPopupArrowSize); // make it 1 less than divider, or kMaxPopupArrowSize
173
174 // put them at the right or the bottom
175 if (orientation == JSplitPane.VERTICAL_SPLIT) {
176 int yPosition = 0;
177 if (size.height > maxSize) {
178 final int diff = size.height - maxSize;
179 yPosition = diff / 2;
180 }
181 int xPosition = kMaxPopupArrowSize + ONE_TOUCH_OFFSET;
182
183 rightButton.setBounds(xPosition, yPosition, kMaxPopupArrowSize, blockSize);
184
185 xPosition -= (kMaxPopupArrowSize + ONE_TOUCH_OFFSET);
186 leftButton.setBounds(xPosition, yPosition, kMaxPopupArrowSize, blockSize);
187 } else {
188 int xPosition = 0;
189 if (size.width > maxSize) {
190 final int diff = size.width - maxSize;
191 xPosition = diff / 2;
192 }
193 int yPosition = kMaxPopupArrowSize + ONE_TOUCH_OFFSET;
194
195 rightButton.setBounds(xPosition, yPosition, blockSize, kMaxPopupArrowSize);
196
197 yPosition -= (kMaxPopupArrowSize + ONE_TOUCH_OFFSET);
198 leftButton.setBounds(xPosition, yPosition, blockSize, kMaxPopupArrowSize);
199 }
200 }
201 }
202
203 public static Border getHorizontalSplitDividerGradientVariant() {
204 return HorizontalSplitDividerGradientPainter.instance();
205 }
206
207 static class HorizontalSplitDividerGradientPainter implements Border {
208 private static final RecyclableSingleton<HorizontalSplitDividerGradientPainter> instance = new RecyclableSingletonFromDefaultConstructor<HorizontalSplitDividerGradientPainter>(HorizontalSplitDividerGradientPainter.class);
209 static HorizontalSplitDividerGradientPainter instance() {
210 return instance.get();
211 }
212
213 final Color startColor = Color.white;
214 final Color endColor = new Color(217, 217, 217);
215 final Color borderLines = Color.lightGray;
216
217 public Insets getBorderInsets(final Component c) {
218 return new Insets(0, 0, 0, 0);
219 }
220
221 public boolean isBorderOpaque() {
222 return true;
223 }
224
225 public void paintBorder(final Component c, final Graphics g, final int x, final int y, final int width, final int height) {
226 if (!(g instanceof Graphics2D)) return;
227
228 final Graphics2D g2d = (Graphics2D)g;
229 final Color oldColor = g2d.getColor();
230
231 g2d.setPaint(new GradientPaint(0, 0, startColor, 0, height, endColor));
232 g2d.fillRect(x, y, width, height);
233 g2d.setColor(borderLines);
234 g2d.drawLine(x, y, x + width, y);
235 g2d.drawLine(x, y + height - 1, x + width, y + height - 1);
236
237 g2d.setColor(oldColor);
238 }
239 }
240 }