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.ActionEvent;
30 import java.awt.event.ItemEvent;
31
32 final class WListPeer extends WComponentPeer implements ListPeer {
33
34 @Override
35 public boolean isFocusable() {
36 return true;
37 }
38
39 // ListPeer implementation
40
41 @Override
42 public int[] getSelectedIndexes() {
43 List l = (List)target;
44 int len = l.getItemCount();
45 int sel[] = new int[len];
46 int nsel = 0;
47 for (int i = 0 ; i < len ; i++) {
48 if (isSelected(i)) {
49 sel[nsel++] = i;
50 }
51 }
52 int selected[] = new int[nsel];
53 System.arraycopy(sel, 0, selected, 0, nsel);
54 return selected;
55 }
56
57 @Override
58 public void add(String item, int index) {
59 addItem(item, index);
60 }
61
62 @Override
63 public void removeAll() {
64 clear();
65 }
66
67 @Override
68 public void setMultipleMode (boolean b) {
69 setMultipleSelections(b);
70 }
71
72 @Override
73 public Dimension getPreferredSize(int rows) {
74 if ( fm == null ) {
75 List li = (List)target;
76 fm = getFontMetrics( li.getFont() );
77 }
78 Dimension d = getMinimumSize(rows);
79 d.width = Math.max(d.width, getMaxWidth() + 20);
80 return d;
81 }
82
83 @Override
84 public Dimension getMinimumSize(int rows) {
85 return new Dimension(20 + fm.stringWidth("0123456789abcde"),
86 (fm.getHeight() * rows) + 4); // include borders
87 }
88
89 private FontMetrics fm;
90 public void addItem(String item, int index) {
91 addItems(new String[] {item}, index, fm.stringWidth(item));
92 }
93 native void addItems(String[] items, int index, int width);
94
95 @Override
96 public native void delItems(int start, int end);
97 public void clear() {
98 List l = (List)target;
99 delItems(0, l.getItemCount());
100 }
101 @Override
102 public native void select(int index);
103 @Override
104 public native void deselect(int index);
105 @Override
106 public native void makeVisible(int index);
107 public native void setMultipleSelections(boolean v);
108 public native int getMaxWidth();
109 // Toolkit & peer internals
110
111 WListPeer(List target) {
112 super(target);
113 }
114
115 @Override
116 native void create(WComponentPeer parent);
117
118 @Override
119 void initialize() {
120 List li = (List)target;
121
122 fm = getFontMetrics( li.getFont() );
123
124 // Fixed 6336384: setFont should be done before addItems
125 Font f = li.getFont();
126 if (f != null) {
127 setFont(f);
128 }
129
130 // add any items that were already inserted in the target.
131 int nitems = li.getItemCount();
132 if (nitems > 0) {
133 String[] items = new String[nitems];
134 int maxWidth = 0;
135 int width = 0;
136 for (int i = 0; i < nitems; i++) {
137 items[i] = li.getItem(i);
138 width = fm.stringWidth(items[i]);
139 if (width > maxWidth) {
140 maxWidth = width;
141 }
142 }
143 addItems(items, 0, maxWidth);
144 }
145
146 // set whether this list should allow multiple selections.
147 setMultipleSelections(li.isMultipleMode());
148
149 // select the item if necessary.
150 int sel[] = li.getSelectedIndexes();
151 for (int i = 0 ; i < sel.length ; i++) {
152 select(sel[i]);
153 }
154
155 // make the visible position visible.
156 // fix for 4676536 by kdm@sparc.spb.su
157 // we should call makeVisible() after we call select()
158 // because of a bug in Windows which is manifested by
159 // incorrect scrolling of the selected item if the list
160 // height is less than an item height of the list.
161 int index = li.getVisibleIndex();
162 if (index < 0 && sel.length > 0) {
163 index = sel[0];
164 }
165 if (index >= 0) {
166 makeVisible(index);
167 }
168
169 super.initialize();
170 }
171
172 @Override
173 public boolean shouldClearRectBeforePaint() {
174 return false;
175 }
176
177 private native void updateMaxItemWidth();
178
179 /*public*/ native boolean isSelected(int index);
180
181 // update the fontmetrics when the font changes
182 @Override
183 synchronized void _setFont(Font f)
184 {
185 super._setFont( f );
186 fm = getFontMetrics( ((List)target).getFont() );
187 updateMaxItemWidth();
188 }
189
190 // native callbacks
191
192 void handleAction(final int index, final long when, final int modifiers) {
193 final List l = (List)target;
194 WToolkit.executeOnEventHandlerThread(l, new Runnable() {
195 @Override
196 public void run() {
197 l.select(index);
198 postEvent(new ActionEvent(target, ActionEvent.ACTION_PERFORMED,
199 l.getItem(index), when, modifiers));
200 }
201 });
202 }
203
204 void handleListChanged(final int index) {
205 final List l = (List)target;
206 WToolkit.executeOnEventHandlerThread(l, new Runnable() {
207 @Override
208 public void run() {
209 postEvent(new ItemEvent(l, ItemEvent.ITEM_STATE_CHANGED,
210 Integer.valueOf(index),
211 isSelected(index)? ItemEvent.SELECTED :
212 ItemEvent.DESELECTED));
213
214 }
215 });
216 }
217 }