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
|
/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the config.tests 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 Digia Plc 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 "filereader.h"
FileReader::FileReader(QWidget *parent)
: QWidget(parent)
{
textEdit = new QTextEdit;
taxFileButton = new QPushButton("Tax File");
accountFileButton = new QPushButton("Accounts File");
reportFileButton = new QPushButton("Report File");
//! [0]
signalMapper = new QSignalMapper(this);
signalMapper->setMapping(taxFileButton, QString("taxfile.txt"));
signalMapper->setMapping(accountFileButton, QString("accountsfile.txt"));
signalMapper->setMapping(reportFileButton, QString("reportfile.txt"));
connect(taxFileButton, SIGNAL(clicked()),
signalMapper, SLOT (map()));
connect(accountFileButton, SIGNAL(clicked()),
signalMapper, SLOT (map()));
connect(reportFileButton, SIGNAL(clicked()),
signalMapper, SLOT (map()));
//! [0]
//! [1]
connect(signalMapper, SIGNAL(mapped(QString)),
this, SLOT(readFile(QString)));
//! [1]
/*
//! [2]
//slower due to signature normalization at runtime
connect(signalMapper, SIGNAL(mapped(const QString &)),
this, SLOT(readFile(const QString &)));
//! [2]
*/
QHBoxLayout *buttonLayout = new QHBoxLayout;
buttonLayout->addWidget(taxFileButton);
buttonLayout->addWidget(accountFileButton);
buttonLayout->addWidget(reportFileButton);
QVBoxLayout *mainLayout = new QVBoxLayout;
mainLayout->addWidget(textEdit);
mainLayout->addLayout(buttonLayout);
setLayout(mainLayout);
}
void FileReader::readFile(const QString &filename)
{
QFile file(filename);
if (!file.open(QIODevice::ReadOnly)) {
QMessageBox::information(this, tr("Unable to open file"),
file.errorString());
return;
}
QTextStream in(&file);
textEdit->setPlainText(in.readAll());
}
|
