1 /*
2 * Copyright (c) 2013, 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 sun.swing.SwingUtilities2;
29
30 import javax.swing.*;
31 import java.awt.*;
32
33 @SuppressWarnings("serial") // Superclass is not serializable across versions
34 class AquaComboBoxRendererInternal<E> extends JLabel implements ListCellRenderer<E> {
35 final JComboBox<?> fComboBox;
36 boolean fSelected;
37 boolean fChecked;
38 boolean fInList;
39 boolean fEditable;
40 boolean fDrawCheckedItem = true;
41
42 // Provides space for a checkbox, and is translucent
43 public AquaComboBoxRendererInternal(final JComboBox<?> comboBox) {
44 super();
45 fComboBox = comboBox;
46 }
47
48 // Don't include checkIcon space, because this is also used for button size calculations
49 // - the popup-size calc will get checkIcon space from getInsets
50 public Dimension getPreferredSize() {
51 // From BasicComboBoxRenderer - trick to avoid zero-height items
52 final Dimension size;
53
54 final String text = getText();
55 if ((text == null) || ("".equals(text))) {
56 setText(" ");
57 size = super.getPreferredSize();
58 setText("");
59 } else {
60 size = super.getPreferredSize();
61 }
62 return size;
63 }
64
65 // Don't paint the border here, it gets painted by the UI
66 protected void paintBorder(final Graphics g) {
67
68 }
69
70 public int getBaseline(int width, int height) {
71 return super.getBaseline(width, height) - 1;
72 }
73
74 // Really means is the one with the mouse over it
75 public Component getListCellRendererComponent(final JList<? extends E> list,
76 final E value, int index,
77 final boolean isSelected,
78 final boolean cellHasFocus) {
79 fInList = (index >= 0); // When the button wants the item painted, it passes in -1
80 fSelected = isSelected;
81 if (index < 0) {
82 index = fComboBox.getSelectedIndex();
83 }
84
85 // changed this to not ask for selected index but directly compare the current item and selected item
86 // different from basic because basic has no concept of checked, just has the last one selected,
87 // and the user changes selection. We have selection and a check mark.
88 // we used to call fComboBox.getSelectedIndex which ends up being a very bad call for large checkboxes
89 // it does a linear compare of every object in the checkbox until it finds the selected one, so if
90 // we have a 5000 element list we will 5000 * (selected index) .equals() of objects.
91 // See Radar #3141307
92
93 // Fix for Radar # 3204287 where we ask for an item at a negative index!
94 if (index >= 0) {
95 final Object item = fComboBox.getItemAt(index);
96 fChecked = fInList && item != null && item.equals(fComboBox.getSelectedItem());
97 } else {
98 fChecked = false;
99 }
100
101 fEditable = fComboBox.isEditable();
102 if (isSelected) {
103 if (fEditable) {
104 setBackground(UIManager.getColor("List.selectionBackground"));
105 setForeground(UIManager.getColor("List.selectionForeground"));
106 } else {
107 setBackground(list.getSelectionBackground());
108 setForeground(list.getSelectionForeground());
109 }
110 } else {
111 if (fEditable) {
112 setBackground(UIManager.getColor("List.background"));
113 setForeground(UIManager.getColor("List.foreground"));
114 } else {
115 setBackground(list.getBackground());
116 setForeground(list.getForeground());
117 }
118 }
119
120 setFont(list.getFont());
121
122 if (value instanceof Icon) {
123 setIcon((Icon)value);
124 } else {
125 setText((value == null) ? " " : value.toString());
126 }
127 return this;
128 }
129
130 public Insets getInsets(Insets insets) {
131 if (insets == null) insets = new Insets(0, 0, 0, 0);
132 insets.top = 1;
133 insets.bottom = 1;
134 insets.right = 5;
135 insets.left = (fInList && !fEditable ? 16 + 7 : 5);
136 return insets;
137 }
138
139 protected void setDrawCheckedItem(final boolean drawCheckedItem) {
140 this.fDrawCheckedItem = drawCheckedItem;
141 }
142
143 // Paint this component, and a checkbox if it's the selected item and not in the button
144 protected void paintComponent(final Graphics g) {
145 if (fInList) {
146 if (fSelected && !fEditable) {
147 AquaMenuPainter.instance().paintSelectedMenuItemBackground(g, getWidth(), getHeight());
148 } else {
149 g.setColor(getBackground());
150 g.fillRect(0, 0, getWidth(), getHeight());
151 }
152
153 if (fChecked && !fEditable && fDrawCheckedItem) {
154 final int y = getHeight() - 4;
155 g.setColor(getForeground());
156 SwingUtilities2.getTextUIDrawing(fComboBox)
157 .drawString(fComboBox, g, "\u2713", 6, y);
158 }
159 }
160 super.paintComponent(g);
161 }
162 }