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Diffstat (limited to 'examples/webenginewidgets/markdowneditor/mainwindow.cpp')
| -rw-r--r-- | examples/webenginewidgets/markdowneditor/mainwindow.cpp | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/examples/webenginewidgets/markdowneditor/mainwindow.cpp b/examples/webenginewidgets/markdowneditor/mainwindow.cpp new file mode 100644 index 000000000..fec7c661e --- /dev/null +++ b/examples/webenginewidgets/markdowneditor/mainwindow.cpp @@ -0,0 +1,172 @@ +/**************************************************************************** +** +** Copyright (C) 2015 The Qt Company Ltd. +** Contact: http://www.qt.io/licensing/ +** +** This file is part of the demonstration applications of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see http://www.qt.io/terms-conditions. For further +** information use the contact form at http://www.qt.io/contact-us. +** +** 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. +** +** As a special exception, The Qt Company gives you certain additional +** rights. These rights are described in The Qt Company LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "mainwindow.h" +#include "previewpage.h" +#include "ui_mainwindow.h" + +#include <QFile> +#include <QFileDialog> +#include <QMessageBox> +#include <QTextStream> +#include <QWebChannel> + +MainWindow::MainWindow(QWidget *parent) : + QMainWindow(parent), + ui(new Ui::MainWindow) +{ + ui->setupUi(this); + + PreviewPage *page = new PreviewPage(this); + ui->preview->setPage(page); + + connect(ui->editor, &QPlainTextEdit::textChanged, + [this]() { m_content.setText(ui->editor->toPlainText()); }); + + QWebChannel *channel = new QWebChannel(this); + channel->registerObject(QStringLiteral("content"), &m_content); + page->setWebChannel(channel); + + ui->preview->setUrl(QUrl("qrc:/index.html")); + + connect(ui->actionNew, &QAction::triggered, this, &MainWindow::onFileNew); + connect(ui->actionOpen, &QAction::triggered, this, &MainWindow::onFileOpen); + connect(ui->actionSave, &QAction::triggered, this, &MainWindow::onFileSave); + connect(ui->actionSaveAs, &QAction::triggered, this, &MainWindow::onFileSaveAs); + connect(ui->actionExit, &QAction::triggered, this, &MainWindow::onExit); + + connect(ui->editor->document(), &QTextDocument::modificationChanged, + ui->actionSave, &QAction::setEnabled); + + QFile defaultTextFile(":/default.md"); + defaultTextFile.open(QIODevice::ReadOnly); + ui->editor->setPlainText(defaultTextFile.readAll()); +} + +MainWindow::~MainWindow() +{ + delete ui; +} + +bool MainWindow::isModified() const +{ + return ui->editor->document()->isModified(); +} + +void MainWindow::onFileNew() +{ + if (isModified()) { + QMessageBox::StandardButton button = QMessageBox::question(this, windowTitle(), + tr("You have unsaved changes. Do you want to create a new document anyway?")); + if (button != QMessageBox::Yes) + return; + } + + m_filePath.clear(); + ui->editor->setPlainText(tr("## New document")); + ui->editor->document()->setModified(false); +} + +void MainWindow::onFileOpen() +{ + if (isModified()) { + QMessageBox::StandardButton button = QMessageBox::question(this, windowTitle(), + tr("You have unsaved changes. Do you want to open a new document anyway?")); + if (button != QMessageBox::Yes) + return; + } + + QString path = QFileDialog::getOpenFileName(this, + tr("Open MarkDown File"), "", tr("MarkDown File (*.md)")); + if (path.isEmpty()) + return; + + QFile f(path); + if (!f.open(QIODevice::ReadOnly)) { + QMessageBox::warning(this, windowTitle(), + tr("Could not open file %1: %2").arg( + QDir::toNativeSeparators(path), f.errorString())); + return; + } + m_filePath = path; + ui->editor->setPlainText(f.readAll()); +} + +void MainWindow::onFileSave() +{ + if (m_filePath.isEmpty()) { + onFileSaveAs(); + return; + } + + QFile f(m_filePath); + if (!f.open(QIODevice::WriteOnly | QIODevice::Text)) { + QMessageBox::warning(this, windowTitle(), + tr("Could not write to file %1: %2").arg( + QDir::toNativeSeparators(m_filePath), f.errorString())); + return; + } + QTextStream str(&f); + str << ui->editor->toPlainText(); + + ui->editor->document()->setModified(false); +} + +void MainWindow::onFileSaveAs() +{ + QString path = QFileDialog::getSaveFileName(this, + tr("Save MarkDown File"), "", tr("MarkDown File (*.md, *.markdown)")); + if (path.isEmpty()) + return; + m_filePath = path; + onFileSave(); +} + +void MainWindow::onExit() +{ + if (isModified()) { + QMessageBox::StandardButton button = QMessageBox::question(this, windowTitle(), + tr("You have unsaved changes. Do you want to exit anyway?")); + if (button != QMessageBox::Yes) + return; + } + close(); +} |