1 ///////////////////////////////////////////////////////////////////////////////////////////////
2 // checkstyle: Checks Java source code and other text files for adherence to a set of rules.
3 // Copyright (C) 2001-2024 the original author or authors.
4 //
5 // This library is free software; you can redistribute it and/or
6 // modify it under the terms of the GNU Lesser General Public
7 // License as published by the Free Software Foundation; either
8 // version 2.1 of the License, or (at your option) any later version.
9 //
10 // This library is distributed in the hope that it will be useful,
11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 // Lesser General Public License for more details.
14 //
15 // You should have received a copy of the GNU Lesser General Public
16 // License along with this library; if not, write to the Free Software
17 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 ///////////////////////////////////////////////////////////////////////////////////////////////
19
20 package com.puppycrawl.tools.checkstyle.gui;
21
22 import java.awt.Component;
23 import java.awt.Graphics;
24
25 import javax.swing.JTable;
26 import javax.swing.JTree;
27 import javax.swing.UIManager;
28 import javax.swing.table.TableCellRenderer;
29 import javax.swing.tree.DefaultTreeCellRenderer;
30 import javax.swing.tree.TreeCellRenderer;
31 import javax.swing.tree.TreeModel;
32
33 /**
34 * A TreeCellRenderer that displays a JTree.
35 */
36 class TreeTableCellRenderer extends JTree implements
37 TableCellRenderer {
38
39 /**
40 * Serial ID.
41 */
42 private static final long serialVersionUID = 4324031590789321581L;
43
44 /** The text color for selected cells. */
45 private static final String COLOR_KEY_TABLE_SELECTION_FOREGROUND = "Table.selectionForeground";
46
47 /** The background color for selected cells. */
48 private static final String COLOR_KEY_TABLE_SELECTION_BACKGROUND = "Table.selectionBackground";
49
50 /** The background color for table. */
51 private static final String COLOR_KEY_TABLE_BACKGROUND = "Table.background";
52
53 /** Tree table to render. */
54 private final TreeTable treeTable;
55
56 /** Last table/tree row asked to render. */
57 private int visibleRow;
58
59 /**
60 * Creates a new instance.
61 *
62 * @param treeTable tree table to render.
63 * @param model Tree model.
64 */
65 /* package */ TreeTableCellRenderer(TreeTable treeTable, TreeModel model) {
66 super(model);
67 this.treeTable = treeTable;
68 }
69
70 /**
71 * UpdateUI is overridden to set the colors of the Tree's renderer
72 * to match that of the table.
73 */
74 @Override
75 public void updateUI() {
76 super.updateUI();
77 // Make the tree's cell renderer use the table's cell selection
78 // colors.
79 final TreeCellRenderer tcr = getCellRenderer();
80 if (tcr instanceof DefaultTreeCellRenderer) {
81 final DefaultTreeCellRenderer renderer = (DefaultTreeCellRenderer) tcr;
82 renderer.setBorderSelectionColor(null);
83 renderer.setTextSelectionColor(
84 UIManager.getColor(COLOR_KEY_TABLE_SELECTION_FOREGROUND));
85 renderer.setBackgroundSelectionColor(
86 UIManager.getColor(COLOR_KEY_TABLE_SELECTION_BACKGROUND));
87 }
88 }
89
90 /**
91 * Sets the row height of the tree, and forwards the row height to
92 * the table.
93 */
94 @Override
95 public void setRowHeight(int newRowHeight) {
96 if (newRowHeight > 0) {
97 super.setRowHeight(newRowHeight);
98 if (treeTable != null
99 && treeTable.getRowHeight() != newRowHeight) {
100 treeTable.setRowHeight(getRowHeight());
101 }
102 }
103 }
104
105 /**
106 * This is overridden to set the height to match that of the JTable.
107 */
108 @Override
109 public void setBounds(int x, int y, int w, int h) {
110 super.setBounds(x, 0, w, treeTable.getHeight());
111 }
112
113 /**
114 * Subclassed to translate the graphics such that the last visible
115 * row will be drawn at 0,0.
116 */
117 @Override
118 public void paint(Graphics graph) {
119 graph.translate(0, -visibleRow * getRowHeight());
120 super.paint(graph);
121 }
122
123 /**
124 * TreeCellRenderer method. Overridden to update the visible row.
125 *
126 * @see TableCellRenderer
127 */
128 @Override
129 public Component getTableCellRendererComponent(JTable table,
130 Object value,
131 boolean isSelected,
132 boolean hasFocus,
133 int row, int column) {
134 final String colorKey;
135 if (isSelected) {
136 colorKey = COLOR_KEY_TABLE_SELECTION_BACKGROUND;
137 }
138 else {
139 colorKey = COLOR_KEY_TABLE_BACKGROUND;
140 }
141
142 setBackground(UIManager.getColor(colorKey));
143 visibleRow = row;
144 return this;
145 }
146
147 }