--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/tools/codecs/mainwindow.cpp Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,203 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+
+#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);
+ 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);
+}