mainwindow.cpp Example Filerichtext/syntaxhighlighter/mainwindow.cpp/**************************************************************************** ** ** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). ** Contact: http://www.qt-project.org/ ** ** 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 Nokia Corporation and its Subsidiary(-ies) 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 <QtWidgets> #include "mainwindow.h" MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent) { setupFileMenu(); setupHelpMenu(); setupEditor(); setCentralWidget(editor); setWindowTitle(tr("Syntax Highlighter")); } 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()); } } 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()); } void MainWindow::setupFileMenu() { QMenu *fileMenu = new QMenu(tr("&File"), this); menuBar()->addMenu(fileMenu); fileMenu->addAction(tr("&New"), this, SLOT(newFile()), QKeySequence::New); fileMenu->addAction(tr("&Open..."), this, SLOT(openFile()), QKeySequence::Open); fileMenu->addAction(tr("E&xit"), qApp, SLOT(quit()), QKeySequence::Quit); } void MainWindow::setupHelpMenu() { QMenu *helpMenu = new QMenu(tr("&Help"), this); menuBar()->addMenu(helpMenu); helpMenu->addAction(tr("&About"), this, SLOT(about())); helpMenu->addAction(tr("About &Qt"), qApp, SLOT(aboutQt())); } |