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Diffstat (limited to 'doc/src/snippets/signalmapper/filereader.cpp')
-rw-r--r-- | doc/src/snippets/signalmapper/filereader.cpp | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/doc/src/snippets/signalmapper/filereader.cpp b/doc/src/snippets/signalmapper/filereader.cpp new file mode 100644 index 0000000000..d7be2e854b --- /dev/null +++ b/doc/src/snippets/signalmapper/filereader.cpp @@ -0,0 +1,107 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** 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 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 "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()); +} + |