diff options
Diffstat (limited to 'examples/webenginewidgets/markdowneditor/mainwindow.cpp')
| -rw-r--r-- | examples/webenginewidgets/markdowneditor/mainwindow.cpp | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/examples/webenginewidgets/markdowneditor/mainwindow.cpp b/examples/webenginewidgets/markdowneditor/mainwindow.cpp new file mode 100644 index 000000000..352b7944a --- /dev/null +++ b/examples/webenginewidgets/markdowneditor/mainwindow.cpp @@ -0,0 +1,170 @@ +/**************************************************************************** +** +** Copyright (C) 2016 The Qt Company Ltd. +** Contact: http://www.qt.io/licensing/ +** +** 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 The Qt Company Ltd 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 "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(); +} |