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Diffstat (limited to 'examples/widgets/tools/codecs/mainwindow.cpp')
| -rw-r--r-- | examples/widgets/tools/codecs/mainwindow.cpp | 202 |
1 files changed, 202 insertions, 0 deletions
diff --git a/examples/widgets/tools/codecs/mainwindow.cpp b/examples/widgets/tools/codecs/mainwindow.cpp new file mode 100644 index 0000000000..4009e30720 --- /dev/null +++ b/examples/widgets/tools/codecs/mainwindow.cpp @@ -0,0 +1,202 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/legal +** +** 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 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 <QtWidgets> + +#include "mainwindow.h" +#include "previewform.h" + +MainWindow::MainWindow() +{ + textEdit = new QTextEdit; + textEdit->setLineWrapMode(QTextEdit::NoWrap); + setCentralWidget(textEdit); + + findCodecs(); + + previewForm = new PreviewForm(this); + previewForm->setCodecList(codecs); + + createActions(); + createMenus(); + + setWindowTitle(tr("Codecs")); + resize(500, 400); +} + +void MainWindow::open() +{ + QString fileName = QFileDialog::getOpenFileName(this); + if (!fileName.isEmpty()) { + QFile file(fileName); + if (!file.open(QFile::ReadOnly)) { + QMessageBox::warning(this, tr("Codecs"), + tr("Cannot read file %1:\n%2") + .arg(fileName) + .arg(file.errorString())); + return; + } + + QByteArray data = file.readAll(); + + previewForm->setEncodedData(data); + if (previewForm->exec()) + textEdit->setPlainText(previewForm->decodedString()); + } +} + +void MainWindow::save() +{ + QString fileName = QFileDialog::getSaveFileName(this); + if (!fileName.isEmpty()) { + QFile file(fileName); + if (!file.open(QFile::WriteOnly | QFile::Text)) { + QMessageBox::warning(this, tr("Codecs"), + tr("Cannot write file %1:\n%2") + .arg(fileName) + .arg(file.errorString())); + return; + } + + QAction *action = qobject_cast<QAction *>(sender()); + QByteArray codecName = action->data().toByteArray(); + + QTextStream out(&file); + out.setCodec(codecName.constData()); + out << textEdit->toPlainText(); + } +} + +void MainWindow::about() +{ + QMessageBox::about(this, tr("About Codecs"), + tr("The <b>Codecs</b> example demonstrates how to read and write " + "files using various encodings.")); +} + +void MainWindow::aboutToShowSaveAsMenu() +{ + QString currentText = textEdit->toPlainText(); + + foreach (QAction *action, saveAsActs) { + QByteArray codecName = action->data().toByteArray(); + QTextCodec *codec = QTextCodec::codecForName(codecName); + action->setVisible(codec && codec->canEncode(currentText)); + } +} + +void MainWindow::findCodecs() +{ + QMap<QString, QTextCodec *> codecMap; + QRegExp iso8859RegExp("ISO[- ]8859-([0-9]+).*"); + + foreach (int mib, QTextCodec::availableMibs()) { + QTextCodec *codec = QTextCodec::codecForMib(mib); + + QString sortKey = codec->name().toUpper(); + int rank; + + if (sortKey.startsWith("UTF-8")) { + rank = 1; + } else if (sortKey.startsWith("UTF-16")) { + rank = 2; + } else if (iso8859RegExp.exactMatch(sortKey)) { + if (iso8859RegExp.cap(1).size() == 1) + rank = 3; + else + rank = 4; + } else { + rank = 5; + } + sortKey.prepend(QChar('0' + rank)); + + codecMap.insert(sortKey, codec); + } + codecs = codecMap.values(); +} + +void MainWindow::createActions() +{ + openAct = new QAction(tr("&Open..."), this); + openAct->setShortcuts(QKeySequence::Open); + connect(openAct, SIGNAL(triggered()), this, SLOT(open())); + + foreach (QTextCodec *codec, codecs) { + QString text = tr("%1...").arg(QString(codec->name())); + + QAction *action = new QAction(text, this); + action->setData(codec->name()); + connect(action, SIGNAL(triggered()), this, SLOT(save())); + saveAsActs.append(action); + } + + exitAct = new QAction(tr("E&xit"), this); + exitAct->setShortcuts(QKeySequence::Quit); + connect(exitAct, SIGNAL(triggered()), this, SLOT(close())); + + aboutAct = new QAction(tr("&About"), this); + connect(aboutAct, SIGNAL(triggered()), this, SLOT(about())); + + aboutQtAct = new QAction(tr("About &Qt"), this); + connect(aboutQtAct, SIGNAL(triggered()), qApp, SLOT(aboutQt())); +} + +void MainWindow::createMenus() +{ + saveAsMenu = new QMenu(tr("&Save As"), this); + foreach (QAction *action, saveAsActs) + saveAsMenu->addAction(action); + connect(saveAsMenu, SIGNAL(aboutToShow()), + this, SLOT(aboutToShowSaveAsMenu())); + + fileMenu = new QMenu(tr("&File"), this); + fileMenu->addAction(openAct); + fileMenu->addMenu(saveAsMenu); + fileMenu->addSeparator(); + fileMenu->addAction(exitAct); + + helpMenu = new QMenu(tr("&Help"), this); + helpMenu->addAction(aboutAct); + helpMenu->addAction(aboutQtAct); + + menuBar()->addMenu(fileMenu); + menuBar()->addSeparator(); + menuBar()->addMenu(helpMenu); +} |