1 /*
2 * Copyright (c) 1996, 2018, 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
34 import sun.awt.AWTAccessor;
35 import sun.awt.SunToolkit;
36
37 final class WChoicePeer extends WComponentPeer implements ChoicePeer {
38
39 // WComponentPeer overrides
40
41 @Override
42 public Dimension getMinimumSize() {
43 FontMetrics fm = getFontMetrics(((Choice)target).getFont());
44 Choice c = (Choice)target;
45 int w = 0;
46 for (int i = c.getItemCount() ; i-- > 0 ;) {
47 w = Math.max(fm.stringWidth(c.getItem(i)), w);
48 }
49 return new Dimension(28 + w, Math.max(fm.getHeight() + 6, 15));
50 }
51 @Override
52 public boolean isFocusable() {
53 return true;
54 }
55
56 // ChoicePeer implementation
57
58 @Override
59 public native void select(int index);
60
61 @Override
62 public void add(String item, int index) {
63 addItems(new String[] {item}, index);
64 }
65
66 @Override
67 public boolean shouldClearRectBeforePaint() {
68 return false;
69 }
70
71 @Override
72 public native void removeAll();
73 @Override
74 public native void remove(int index);
75
76 public native void addItems(String[] items, int index);
77
78 @Override
79 public synchronized native void reshape(int x, int y, int width, int height);
80
81 private WindowListener windowListener;
82
83 // Toolkit & peer internals
84
85 WChoicePeer(Choice target) {
86 super(target);
87 }
88
89 @Override
90 native void create(WComponentPeer parent);
91
92 @Override
93 void initialize() {
94 Choice opt = (Choice)target;
95 int itemCount = opt.getItemCount();
96 if (itemCount > 0) {
97 String[] items = new String[itemCount];
98 for (int i=0; i < itemCount; i++) {
99 items[i] = opt.getItem(i);
100 }
101 addItems(items, 0);
102 if (opt.getSelectedIndex() >= 0) {
103 select(opt.getSelectedIndex());
104 }
105 }
106
107 Window parentWindow = SunToolkit.getContainingWindow((Component)target);
108 if (parentWindow != null) {
109 final WWindowPeer wpeer = AWTAccessor.getComponentAccessor()
110 .getPeer(parentWindow);
111 if (wpeer != null) {
112 windowListener = new WindowAdapter() {
113 @Override
114 public void windowIconified(WindowEvent e) {
115 closeList();
116 }
117 @Override
118 public void windowClosing(WindowEvent e) {
119 closeList();
120 }
121 };
122 wpeer.addWindowListener(windowListener);
123 }
124 }
125 super.initialize();
126 }
127
128 @Override
129 protected void disposeImpl() {
130 // TODO: we should somehow reset the listener when the choice
131 // is moved to another toplevel without destroying its peer.
132 Window parentWindow = SunToolkit.getContainingWindow((Component)target);
133 if (parentWindow != null) {
134 final WWindowPeer wpeer = AWTAccessor.getComponentAccessor()
135 .getPeer(parentWindow);
136 if (wpeer != null) {
137 wpeer.removeWindowListener(windowListener);
138 }
139 }
140 super.disposeImpl();
141 }
142
143 // native callbacks
144
145 void handleAction(final int index) {
146 final Choice c = (Choice)target;
147 WToolkit.executeOnEventHandlerThread(c, new Runnable() {
148 @Override
149 public void run() {
150 c.select(index);
151 postEvent(new ItemEvent(c, ItemEvent.ITEM_STATE_CHANGED,
152 c.getItem(index), ItemEvent.SELECTED));
153 }
154 });
155 }
156
157 int getDropDownHeight() {
158 Choice c = (Choice)target;
159 FontMetrics fm = getFontMetrics(c.getFont());
160 int maxItems = Math.min(c.getItemCount(), 8);
161 return fm.getHeight() * maxItems;
162 }
163
164 native void closeList();
165 }