1 /*
2 * Copyright (c) 2005, 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 package sun.swing.table;
26
27 import sun.swing.DefaultLookup;
28
29 import java.awt.Component;
30 import java.awt.Color;
31 import java.awt.FontMetrics;
32 import java.awt.Graphics;
33 import java.awt.Insets;
34 import java.awt.Point;
35 import java.awt.Rectangle;
36 import java.io.Serializable;
37 import javax.swing.*;
38 import javax.swing.plaf.UIResource;
39 import javax.swing.border.Border;
40 import javax.swing.table.*;
41
42 @SuppressWarnings("serial") // JDK-implementation class
43 public class DefaultTableCellHeaderRenderer extends DefaultTableCellRenderer
44 implements UIResource {
45 private boolean horizontalTextPositionSet;
46 private Icon sortArrow;
47 private EmptyIcon emptyIcon = new EmptyIcon();
48
49 public DefaultTableCellHeaderRenderer() {
50 setHorizontalAlignment(JLabel.CENTER);
51 }
52
53 public void setHorizontalTextPosition(int textPosition) {
54 horizontalTextPositionSet = true;
55 super.setHorizontalTextPosition(textPosition);
56 }
57
58 public Component getTableCellRendererComponent(JTable table, Object value,
59 boolean isSelected, boolean hasFocus, int row, int column) {
60 Icon sortIcon = null;
61
62 boolean isPaintingForPrint = false;
63
64 if (table != null) {
65 JTableHeader header = table.getTableHeader();
66 if (header != null) {
67 Color fgColor = null;
68 Color bgColor = null;
69 if (hasFocus) {
70 fgColor = DefaultLookup.getColor(this, ui, "TableHeader.focusCellForeground");
71 bgColor = DefaultLookup.getColor(this, ui, "TableHeader.focusCellBackground");
72 }
73 if (fgColor == null) {
74 fgColor = header.getForeground();
75 }
76 if (bgColor == null) {
77 bgColor = header.getBackground();
78 }
79 setForeground(fgColor);
80 setBackground(bgColor);
81
82 setFont(header.getFont());
83
84 isPaintingForPrint = header.isPaintingForPrint();
85 }
86
87 if (!isPaintingForPrint && table.getRowSorter() != null) {
88 if (!horizontalTextPositionSet) {
89 // There is a row sorter, and the developer hasn't
90 // set a text position, change to leading.
91 setHorizontalTextPosition(JLabel.LEADING);
92 }
93 SortOrder sortOrder = getColumnSortOrder(table, column);
94 if (sortOrder != null) {
95 switch(sortOrder) {
96 case ASCENDING:
97 sortIcon = DefaultLookup.getIcon(
98 this, ui, "Table.ascendingSortIcon");
99 break;
100 case DESCENDING:
101 sortIcon = DefaultLookup.getIcon(
102 this, ui, "Table.descendingSortIcon");
103 break;
104 case UNSORTED:
105 sortIcon = DefaultLookup.getIcon(
106 this, ui, "Table.naturalSortIcon");
107 break;
108 }
109 }
110 }
111 }
112
113 setText(value == null ? "" : value.toString());
114 setIcon(sortIcon);
115 sortArrow = sortIcon;
116
117 Border border = null;
118 if (hasFocus) {
119 border = DefaultLookup.getBorder(this, ui, "TableHeader.focusCellBorder");
120 }
121 if (border == null) {
122 border = DefaultLookup.getBorder(this, ui, "TableHeader.cellBorder");
123 }
124 setBorder(border);
125
126 return this;
127 }
128
129 public static SortOrder getColumnSortOrder(JTable table, int column) {
130 SortOrder rv = null;
131 if (table == null || table.getRowSorter() == null) {
132 return rv;
133 }
134 java.util.List<? extends RowSorter.SortKey> sortKeys =
135 table.getRowSorter().getSortKeys();
136 if (sortKeys.size() > 0 && sortKeys.get(0).getColumn() ==
137 table.convertColumnIndexToModel(column)) {
138 rv = sortKeys.get(0).getSortOrder();
139 }
140 return rv;
141 }
142
143 @Override
144 public void paintComponent(Graphics g) {
145 boolean b = DefaultLookup.getBoolean(this, ui,
146 "TableHeader.rightAlignSortArrow", false);
147 if (b && sortArrow != null) {
148 //emptyIcon is used so that if the text in the header is right
149 //aligned, or if the column is too narrow, then the text will
150 //be sized appropriately to make room for the icon that is about
151 //to be painted manually here.
152 emptyIcon.width = sortArrow.getIconWidth();
153 emptyIcon.height = sortArrow.getIconHeight();
154 setIcon(emptyIcon);
155 super.paintComponent(g);
156 Point position = computeIconPosition(g);
157 sortArrow.paintIcon(this, g, position.x, position.y);
158 } else {
159 super.paintComponent(g);
160 }
161 }
162
163 private Point computeIconPosition(Graphics g) {
164 FontMetrics fontMetrics = g.getFontMetrics();
165 Rectangle viewR = new Rectangle();
166 Rectangle textR = new Rectangle();
167 Rectangle iconR = new Rectangle();
168 Insets i = getInsets();
169 viewR.x = i.left;
170 viewR.y = i.top;
171 viewR.width = getWidth() - (i.left + i.right);
172 viewR.height = getHeight() - (i.top + i.bottom);
173 SwingUtilities.layoutCompoundLabel(
174 this,
175 fontMetrics,
176 getText(),
177 sortArrow,
178 getVerticalAlignment(),
179 getHorizontalAlignment(),
180 getVerticalTextPosition(),
181 getHorizontalTextPosition(),
182 viewR,
183 iconR,
184 textR,
185 getIconTextGap());
186 int x = getWidth() - i.right - sortArrow.getIconWidth();
187 int y = iconR.y;
188 return new Point(x, y);
189 }
190
191 @SuppressWarnings("serial") // JDK-implementation class
192 private class EmptyIcon implements Icon, Serializable {
193 int width = 0;
194 int height = 0;
195 public void paintIcon(Component c, Graphics g, int x, int y) {}
196 public int getIconWidth() { return width; }
197 public int getIconHeight() { return height; }
198 }
199 }