| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
| ** Contact: https://www.qt.io/licensing/ |
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| ** This file is part of the examples of the Qt Toolkit. |
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| ** $QT_BEGIN_LICENSE:BSD$ |
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| ** BSD License Usage |
| ** Alternatively, you may use this file under the terms of the BSD license |
| ** as follows: |
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| ****************************************************************************/ |
| |
| #include "mainwindow.h" |
| #include "previewpage.h" |
| #include "ui_mainwindow.h" |
| |
| #include <QFile> |
| #include <QFileDialog> |
| #include <QFontDatabase> |
| #include <QMessageBox> |
| #include <QTextStream> |
| #include <QWebChannel> |
| |
| MainWindow::MainWindow(QWidget *parent) : |
| QMainWindow(parent), |
| ui(new Ui::MainWindow) |
| { |
| ui->setupUi(this); |
| ui->editor->setFont(QFontDatabase::systemFont(QFontDatabase::FixedFont)); |
| ui->preview->setContextMenuPolicy(Qt::NoContextMenu); |
| |
| 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; |
| } |
| |
| void MainWindow::openFile(const QString &path) |
| { |
| 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()); |
| } |
| |
| 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; |
| |
| openFile(path); |
| } |
| |
| 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(); |
| } |