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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include <QtWidgets>
#include "mainwindow.h"
//! [0]
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
{
setupFileMenu();
setupHelpMenu();
setupEditor();
setCentralWidget(editor);
setWindowTitle(tr("Syntax Highlighter"));
}
//! [0]
void MainWindow::about()
{
QMessageBox::about(this, tr("About Syntax Highlighter"),
tr("<p>The <b>Syntax Highlighter</b> example shows how " \
"to perform simple syntax highlighting by subclassing " \
"the QSyntaxHighlighter class and describing " \
"highlighting rules using regular expressions.</p>"));
}
void MainWindow::newFile()
{
editor->clear();
}
void MainWindow::openFile(const QString &path)
{
QString fileName = path;
if (fileName.isNull())
fileName = QFileDialog::getOpenFileName(this, tr("Open File"), "", "C++ Files (*.cpp *.h)");
if (!fileName.isEmpty()) {
QFile file(fileName);
if (file.open(QFile::ReadOnly | QFile::Text))
editor->setPlainText(file.readAll());
}
}
//! [1]
void MainWindow::setupEditor()
{
QFont font;
font.setFamily("Courier");
font.setFixedPitch(true);
font.setPointSize(10);
editor = new QTextEdit;
editor->setFont(font);
highlighter = new Highlighter(editor->document());
QFile file("mainwindow.h");
if (file.open(QFile::ReadOnly | QFile::Text))
editor->setPlainText(file.readAll());
}
//! [1]
void MainWindow::setupFileMenu()
{
QMenu *fileMenu = new QMenu(tr("&File"), this);
menuBar()->addMenu(fileMenu);
fileMenu->addAction(tr("&New"), QKeySequence::New,
this, &MainWindow::newFile);
fileMenu->addAction(tr("&Open..."), QKeySequence::Open,
this, [this](){ openFile(); });
fileMenu->addAction(tr("E&xit"), QKeySequence::Quit,
qApp, &QApplication::quit);
}
void MainWindow::setupHelpMenu()
{
QMenu *helpMenu = new QMenu(tr("&Help"), this);
menuBar()->addMenu(helpMenu);
helpMenu->addAction(tr("&About"), this, &MainWindow::about);
helpMenu->addAction(tr("About &Qt"), qApp, &QApplication::aboutQt);
}
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