source: trunk/examples/tools/settingseditor/variantdelegate.cpp

Last change on this file was 846, checked in by Dmitry A. Kuminov, 14 years ago

trunk: Merged in qt 4.7.2 sources from branches/vendor/nokia/qt.
File size: 9.8 KB
Line 
1/****************************************************************************
2**
3** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
4** All rights reserved.
5** Contact: Nokia Corporation (qt-info@nokia.com)
6**
7** This file is part of the examples of the Qt Toolkit.
8**
9** $QT_BEGIN_LICENSE:BSD$
10** You may use this file under the terms of the BSD license as follows:
11**
12** "Redistribution and use in source and binary forms, with or without
13** modification, are permitted provided that the following conditions are
14** met:
15** * Redistributions of source code must retain the above copyright
16** notice, this list of conditions and the following disclaimer.
17** * Redistributions in binary form must reproduce the above copyright
18** notice, this list of conditions and the following disclaimer in
19** the documentation and/or other materials provided with the
20** distribution.
21** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
22** the names of its contributors may be used to endorse or promote
23** products derived from this software without specific prior written
24** permission.
25**
26** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
27** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
28** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
29** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
30** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
31** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
32** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
33** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
34** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
35** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
36** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
37** $QT_END_LICENSE$
38**
39****************************************************************************/
40
41#include <QtGui>
42
43#include "variantdelegate.h"
44
45VariantDelegate::VariantDelegate(QObject *parent)
46 : QItemDelegate(parent)
47{
48 boolExp.setPattern("true|false");
49 boolExp.setCaseSensitivity(Qt::CaseInsensitive);
50
51 byteArrayExp.setPattern("[\\x00-\\xff]*");
52 charExp.setPattern(".");
53 colorExp.setPattern("\\(([0-9]*),([0-9]*),([0-9]*),([0-9]*)\\)");
54 doubleExp.setPattern("");
55 pointExp.setPattern("\\((-?[0-9]*),(-?[0-9]*)\\)");
56 rectExp.setPattern("\\((-?[0-9]*),(-?[0-9]*),(-?[0-9]*),(-?[0-9]*)\\)");
57 signedIntegerExp.setPattern("-?[0-9]*");
58 sizeExp = pointExp;
59 unsignedIntegerExp.setPattern("[0-9]*");
60
61 dateExp.setPattern("([0-9]{,4})-([0-9]{,2})-([0-9]{,2})");
62 timeExp.setPattern("([0-9]{,2}):([0-9]{,2}):([0-9]{,2})");
63 dateTimeExp.setPattern(dateExp.pattern() + "T" + timeExp.pattern());
64}
65
66void VariantDelegate::paint(QPainter *painter,
67 const QStyleOptionViewItem &option,
68 const QModelIndex &index) const
69{
70 if (index.column() == 2) {
71 QVariant value = index.model()->data(index, Qt::UserRole);
72 if (!isSupportedType(value.type())) {
73 QStyleOptionViewItem myOption = option;
74 myOption.state &= ~QStyle::State_Enabled;
75 QItemDelegate::paint(painter, myOption, index);
76 return;
77 }
78 }
79
80 QItemDelegate::paint(painter, option, index);
81}
82
83QWidget *VariantDelegate::createEditor(QWidget *parent,
84 const QStyleOptionViewItem & /* option */,
85 const QModelIndex &index) const
86{
87 if (index.column() != 2)
88 return 0;
89
90 QVariant originalValue = index.model()->data(index, Qt::UserRole);
91 if (!isSupportedType(originalValue.type()))
92 return 0;
93
94 QLineEdit *lineEdit = new QLineEdit(parent);
95 lineEdit->setFrame(false);
96
97 QRegExp regExp;
98
99 switch (originalValue.type()) {
100 case QVariant::Bool:
101 regExp = boolExp;
102 break;
103 case QVariant::ByteArray:
104 regExp = byteArrayExp;
105 break;
106 case QVariant::Char:
107 regExp = charExp;
108 break;
109 case QVariant::Color:
110 regExp = colorExp;
111 break;
112 case QVariant::Date:
113 regExp = dateExp;
114 break;
115 case QVariant::DateTime:
116 regExp = dateTimeExp;
117 break;
118 case QVariant::Double:
119 regExp = doubleExp;
120 break;
121 case QVariant::Int:
122 case QVariant::LongLong:
123 regExp = signedIntegerExp;
124 break;
125 case QVariant::Point:
126 regExp = pointExp;
127 break;
128 case QVariant::Rect:
129 regExp = rectExp;
130 break;
131 case QVariant::Size:
132 regExp = sizeExp;
133 break;
134 case QVariant::Time:
135 regExp = timeExp;
136 break;
137 case QVariant::UInt:
138 case QVariant::ULongLong:
139 regExp = unsignedIntegerExp;
140 break;
141 default:
142 ;
143 }
144
145 if (!regExp.isEmpty()) {
146 QValidator *validator = new QRegExpValidator(regExp, lineEdit);
147 lineEdit->setValidator(validator);
148 }
149
150 return lineEdit;
151}
152
153void VariantDelegate::setEditorData(QWidget *editor,
154 const QModelIndex &index) const
155{
156 QVariant value = index.model()->data(index, Qt::UserRole);
157 if (QLineEdit *lineEdit = qobject_cast<QLineEdit *>(editor))
158 lineEdit->setText(displayText(value));
159}
160
161void VariantDelegate::setModelData(QWidget *editor, QAbstractItemModel *model,
162 const QModelIndex &index) const
163{
164 QLineEdit *lineEdit = qobject_cast<QLineEdit *>(editor);
165 if (!lineEdit->isModified())
166 return;
167
168 QString text = lineEdit->text();
169 const QValidator *validator = lineEdit->validator();
170 if (validator) {
171 int pos;
172 if (validator->validate(text, pos) != QValidator::Acceptable)
173 return;
174 }
175
176 QVariant originalValue = index.model()->data(index, Qt::UserRole);
177 QVariant value;
178
179 switch (originalValue.type()) {
180 case QVariant::Char:
181 value = text.at(0);
182 break;
183 case QVariant::Color:
184 colorExp.exactMatch(text);
185 value = QColor(qMin(colorExp.cap(1).toInt(), 255),
186 qMin(colorExp.cap(2).toInt(), 255),
187 qMin(colorExp.cap(3).toInt(), 255),
188 qMin(colorExp.cap(4).toInt(), 255));
189 break;
190 case QVariant::Date:
191 {
192 QDate date = QDate::fromString(text, Qt::ISODate);
193 if (!date.isValid())
194 return;
195 value = date;
196 }
197 break;
198 case QVariant::DateTime:
199 {
200 QDateTime dateTime = QDateTime::fromString(text, Qt::ISODate);
201 if (!dateTime.isValid())
202 return;
203 value = dateTime;
204 }
205 break;
206 case QVariant::Point:
207 pointExp.exactMatch(text);
208 value = QPoint(pointExp.cap(1).toInt(), pointExp.cap(2).toInt());
209 break;
210 case QVariant::Rect:
211 rectExp.exactMatch(text);
212 value = QRect(rectExp.cap(1).toInt(), rectExp.cap(2).toInt(),
213 rectExp.cap(3).toInt(), rectExp.cap(4).toInt());
214 break;
215 case QVariant::Size:
216 sizeExp.exactMatch(text);
217 value = QSize(sizeExp.cap(1).toInt(), sizeExp.cap(2).toInt());
218 break;
219 case QVariant::StringList:
220 value = text.split(",");
221 break;
222 case QVariant::Time:
223 {
224 QTime time = QTime::fromString(text, Qt::ISODate);
225 if (!time.isValid())
226 return;
227 value = time;
228 }
229 break;
230 default:
231 value = text;
232 value.convert(originalValue.type());
233 }
234
235 model->setData(index, displayText(value), Qt::DisplayRole);
236 model->setData(index, value, Qt::UserRole);
237}
238
239bool VariantDelegate::isSupportedType(QVariant::Type type)
240{
241 switch (type) {
242 case QVariant::Bool:
243 case QVariant::ByteArray:
244 case QVariant::Char:
245 case QVariant::Color:
246 case QVariant::Date:
247 case QVariant::DateTime:
248 case QVariant::Double:
249 case QVariant::Int:
250 case QVariant::LongLong:
251 case QVariant::Point:
252 case QVariant::Rect:
253 case QVariant::Size:
254 case QVariant::String:
255 case QVariant::StringList:
256 case QVariant::Time:
257 case QVariant::UInt:
258 case QVariant::ULongLong:
259 return true;
260 default:
261 return false;
262 }
263}
264
265QString VariantDelegate::displayText(const QVariant &value)
266{
267 switch (value.type()) {
268 case QVariant::Bool:
269 case QVariant::ByteArray:
270 case QVariant::Char:
271 case QVariant::Double:
272 case QVariant::Int:
273 case QVariant::LongLong:
274 case QVariant::String:
275 case QVariant::UInt:
276 case QVariant::ULongLong:
277 return value.toString();
278 case QVariant::Color:
279 {
280 QColor color = qvariant_cast<QColor>(value);
281 return QString("(%1,%2,%3,%4)")
282 .arg(color.red()).arg(color.green())
283 .arg(color.blue()).arg(color.alpha());
284 }
285 case QVariant::Date:
286 return value.toDate().toString(Qt::ISODate);
287 case QVariant::DateTime:
288 return value.toDateTime().toString(Qt::ISODate);
289 case QVariant::Invalid:
290 return "<Invalid>";
291 case QVariant::Point:
292 {
293 QPoint point = value.toPoint();
294 return QString("(%1,%2)").arg(point.x()).arg(point.y());
295 }
296 case QVariant::Rect:
297 {
298 QRect rect = value.toRect();
299 return QString("(%1,%2,%3,%4)")
300 .arg(rect.x()).arg(rect.y())
301 .arg(rect.width()).arg(rect.height());
302 }
303 case QVariant::Size:
304 {
305 QSize size = value.toSize();
306 return QString("(%1,%2)").arg(size.width()).arg(size.height());
307 }
308 case QVariant::StringList:
309 return value.toStringList().join(",");
310 case QVariant::Time:
311 return value.toTime().toString(Qt::ISODate);
312 default:
313 break;
314 }
315 return QString("<%1>").arg(value.typeName());
316}
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