1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
** the names of its contributors may be used to endorse or promote
** products derived from this software without specific prior written
** permission.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtGui>
#include <QtNetwork>
#include "csvview.h"
//! [constructor]
CSVView::CSVView(const QString &mimeType, QWidget *parent)
: QTableView(parent)
{
this->mimeType = mimeType;
}
//! [constructor]
//! [update model begin]
void CSVView::updateModel()
{
QNetworkReply *reply = static_cast<QNetworkReply *>(sender());
if (reply->error() != QNetworkReply::NoError)
return;
bool hasHeader = false;
QString charset = "latin1";
//! [update model begin]
foreach (QString piece, mimeType.split(";")) {
piece = piece.trimmed();
if (piece.contains("=")) {
int index = piece.indexOf("=");
QString left = piece.left(index).trimmed();
QString right = piece.mid(index + 1).trimmed();
if (left == "header")
hasHeader = (right == "present");
else if (left == "charset")
charset = right;
}
}
//! [read data begin]
QTextStream stream(reply);
stream.setCodec(QTextCodec::codecForName(charset.toLatin1()));
QStandardItemModel *model = new QStandardItemModel(this);
//! [read data begin]
QList<QStandardItem *> items;
bool firstLine = hasHeader;
bool wasQuote = false;
bool wasCR = false;
bool quoted = false;
QString text;
while (!stream.atEnd()) {
QString ch = stream.read(1);
if (wasQuote) {
if (ch == "\"") {
if (quoted) {
text += ch; // quoted "" are inserted as "
wasQuote = false; // no quotes are pending
} else {
quoted = true; // unquoted "" starts quoting
wasQuote = true; // with a pending quote
}
continue; // process the next character
} else {
quoted = !quoted; // process the pending quote
wasQuote = false; // no quotes are pending
} // process the current character
} else if (wasCR) {
wasCR = false;
if (ch == "\n") { // CR LF represents the end of a row
if (!text.isEmpty())
items.append(new QStandardItem(QString(text)));
addRow(firstLine, model, items);
items.clear();
text = "";
firstLine = false;
continue; // process the next character
} else
text += "\r"; // CR on its own is inserted
} // process the current character
// wasQuote is never true here.
// wasCR is never true here.
if (ch == "\"")
wasQuote = true; // handle the pending quote later
else if (ch == ",") {
if (quoted)
text += ch;
else {
items.append(new QStandardItem(QString(text)));
text = "";
}
}
else if (ch == "\r") {
if (!quoted)
wasCR = true;
else
text += ch;
}
else if (ch == "\n")
text += ch;
else
text += ch;
}
if (items.count() > 0)
addRow(firstLine, model, items);
//! [update model]
reply->close();
setModel(model);
resizeColumnsToContents();
horizontalHeader()->setStretchLastSection(true);
}
//! [update model]
void CSVView::addRow(bool firstLine, QStandardItemModel *model,
const QList<QStandardItem *> &items)
{
if (firstLine) {
for (int j = 0; j < items.count(); ++j)
model->setHorizontalHeaderItem(j, items[j]);
} else
model->appendRow(items);
}
|
