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| ** This file is part of the examples of the Qt Toolkit. |
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| |
| #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"), this, |
| &MainWindow::newFile, QKeySequence::New); |
| fileMenu->addAction(tr("&Open..."), |
| this, [this](){ openFile(); }, QKeySequence::Open); |
| fileMenu->addAction(tr("E&xit"), qApp, |
| &QApplication::quit, QKeySequence::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); |
| } |