1 /*
2 * Copyright (c) 2013, 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 sun.swing.SwingUtilities2;
29
30 import javax.swing.*;
31 import java.awt.*;
32
33 class AquaComboBoxRendererInternal extends JLabel implements ListCellRenderer {
34 final JComboBox fComboBox;
35 boolean fSelected;
36 boolean fChecked;
37 boolean fInList;
38 boolean fEditable;
39 boolean fDrawCheckedItem = true;
40
41 // Provides space for a checkbox, and is translucent
42 public AquaComboBoxRendererInternal(final JComboBox comboBox) {
43 super();
44 fComboBox = comboBox;
45 }
46
47 // Don't include checkIcon space, because this is also used for button size calculations
48 // - the popup-size calc will get checkIcon space from getInsets
49 public Dimension getPreferredSize() {
50 // From BasicComboBoxRenderer - trick to avoid zero-height items
51 final Dimension size;
52
53 final String text = getText();
54 if ((text == null) || ("".equals(text))) {
55 setText(" ");
56 size = super.getPreferredSize();
57 setText("");
58 } else {
59 size = super.getPreferredSize();
60 }
61 return size;
62 }
63
64 // Don't paint the border here, it gets painted by the UI
65 protected void paintBorder(final Graphics g) {
66
67 }
68
69 public int getBaseline(int width, int height) {
70 return super.getBaseline(width, height) - 1;
71 }
72
73 // Really means is the one with the mouse over it
74 public Component getListCellRendererComponent(final JList list, final Object value, int index, final boolean isSelected, final boolean cellHasFocus) {
75 fInList = (index >= 0); // When the button wants the item painted, it passes in -1
76 fSelected = isSelected;
77 if (index < 0) {
78 index = fComboBox.getSelectedIndex();
79 }
80
81 // changed this to not ask for selected index but directly compare the current item and selected item
82 // different from basic because basic has no concept of checked, just has the last one selected,
83 // and the user changes selection. We have selection and a check mark.
84 // we used to call fComboBox.getSelectedIndex which ends up being a very bad call for large checkboxes
85 // it does a linear compare of every object in the checkbox until it finds the selected one, so if
86 // we have a 5000 element list we will 5000 * (selected index) .equals() of objects.
87 // See Radar #3141307
88
89 // Fix for Radar # 3204287 where we ask for an item at a negative index!
90 if (index >= 0) {
91 final Object item = fComboBox.getItemAt(index);
92 fChecked = fInList && item != null && item.equals(fComboBox.getSelectedItem());
93 } else {
94 fChecked = false;
95 }
96
97 fEditable = fComboBox.isEditable();
98 if (isSelected) {
99 if (fEditable) {
100 setBackground(UIManager.getColor("List.selectionBackground"));
101 setForeground(UIManager.getColor("List.selectionForeground"));
102 } else {
103 setBackground(list.getSelectionBackground());
104 setForeground(list.getSelectionForeground());
105 }
106 } else {
107 if (fEditable) {
108 setBackground(UIManager.getColor("List.background"));
109 setForeground(UIManager.getColor("List.foreground"));
110 } else {
111 setBackground(list.getBackground());
112 setForeground(list.getForeground());
113 }
114 }
115
116 setFont(list.getFont());
117
118 if (value instanceof Icon) {
119 setIcon((Icon)value);
120 } else {
121 setText((value == null) ? " " : value.toString());
122 }
123 return this;
124 }
125
126 public Insets getInsets(Insets insets) {
127 if (insets == null) insets = new Insets(0, 0, 0, 0);
128 insets.top = 1;
129 insets.bottom = 1;
130 insets.right = 5;
131 insets.left = (fInList && !fEditable ? 16 + 7 : 5);
132 return insets;
133 }
134
135 protected void setDrawCheckedItem(final boolean drawCheckedItem) {
136 this.fDrawCheckedItem = drawCheckedItem;
137 }
138
139 // Paint this component, and a checkbox if it's the selected item and not in the button
140 protected void paintComponent(final Graphics g) {
141 if (fInList) {
142 if (fSelected && !fEditable) {
143 AquaMenuPainter.instance().paintSelectedMenuItemBackground(g, getWidth(), getHeight());
144 } else {
145 g.setColor(getBackground());
146 g.fillRect(0, 0, getWidth(), getHeight());
147 }
148
149 if (fChecked && !fEditable && fDrawCheckedItem) {
150 final int y = getHeight() - 4;
151 g.setColor(getForeground());
152 SwingUtilities2.drawString(fComboBox, g, "\u2713", 6, y);
153 }
154 }
155 super.paintComponent(g);
156 }
157 }