1 /*
2 * Copyright (c) 1996, 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.awt.windows;
26
27 import java.awt.*;
28 import java.awt.peer.*;
29 import java.awt.event.ItemEvent;
30 import java.awt.event.WindowEvent;
31 import java.awt.event.WindowListener;
32 import java.awt.event.WindowAdapter;
33 import sun.awt.SunToolkit;
34
35 final class WChoicePeer extends WComponentPeer implements ChoicePeer {
36
37 // WComponentPeer overrides
38
39 @Override
40 public Dimension getMinimumSize() {
41 FontMetrics fm = getFontMetrics(((Choice)target).getFont());
42 Choice c = (Choice)target;
43 int w = 0;
44 for (int i = c.getItemCount() ; i-- > 0 ;) {
45 w = Math.max(fm.stringWidth(c.getItem(i)), w);
46 }
47 return new Dimension(28 + w, Math.max(fm.getHeight() + 6, 15));
48 }
49 @Override
50 public boolean isFocusable() {
51 return true;
52 }
53
54 // ChoicePeer implementation
55
56 @Override
57 public native void select(int index);
58
59 @Override
60 public void add(String item, int index) {
61 addItem(item, index);
62 }
63
64 @Override
65 public boolean shouldClearRectBeforePaint() {
66 return false;
67 }
68
69 @Override
70 public native void removeAll();
71 @Override
72 public native void remove(int index);
73
74 /**
75 * DEPRECATED, but for now, called by add(String, int).
76 */
77 public void addItem(String item, int index) {
78 addItems(new String[] {item}, index);
79 }
80 public native void addItems(String[] items, int index);
81
82 @Override
83 public synchronized native void reshape(int x, int y, int width, int height);
84
85 private WindowListener windowListener;
86
87 // Toolkit & peer internals
88
89 WChoicePeer(Choice target) {
90 super(target);
91 }
92
93 @Override
94 native void create(WComponentPeer parent);
95
96 @Override
97 @SuppressWarnings("deprecation")
98 void initialize() {
99 Choice opt = (Choice)target;
100 int itemCount = opt.getItemCount();
101 if (itemCount > 0) {
102 String[] items = new String[itemCount];
103 for (int i=0; i < itemCount; i++) {
104 items[i] = opt.getItem(i);
105 }
106 addItems(items, 0);
107 if (opt.getSelectedIndex() >= 0) {
108 select(opt.getSelectedIndex());
109 }
110 }
111
112 Window parentWindow = SunToolkit.getContainingWindow((Component)target);
113 if (parentWindow != null) {
114 WWindowPeer wpeer = (WWindowPeer)parentWindow.getPeer();
115 if (wpeer != null) {
116 windowListener = new WindowAdapter() {
117 @Override
118 public void windowIconified(WindowEvent e) {
119 closeList();
120 }
121 @Override
122 public void windowClosing(WindowEvent e) {
123 closeList();
124 }
125 };
126 wpeer.addWindowListener(windowListener);
127 }
128 }
129 super.initialize();
130 }
131
132 @Override
133 @SuppressWarnings("deprecation")
134 protected void disposeImpl() {
135 // TODO: we should somehow reset the listener when the choice
136 // is moved to another toplevel without destroying its peer.
137 Window parentWindow = SunToolkit.getContainingWindow((Component)target);
138 if (parentWindow != null) {
139 WWindowPeer wpeer = (WWindowPeer)parentWindow.getPeer();
140 if (wpeer != null) {
141 wpeer.removeWindowListener(windowListener);
142 }
143 }
144 super.disposeImpl();
145 }
146
147 // native callbacks
148
149 void handleAction(final int index) {
150 final Choice c = (Choice)target;
151 WToolkit.executeOnEventHandlerThread(c, new Runnable() {
152 @Override
153 public void run() {
154 c.select(index);
155 postEvent(new ItemEvent(c, ItemEvent.ITEM_STATE_CHANGED,
156 c.getItem(index), ItemEvent.SELECTED));
157 }
158 });
159 }
160
161 int getDropDownHeight() {
162 Choice c = (Choice)target;
163 FontMetrics fm = getFontMetrics(c.getFont());
164 int maxItems = Math.min(c.getItemCount(), 8);
165 return fm.getHeight() * maxItems;
166 }
167
168 native void closeList();
169 }