Home · All Classes · All Functions · Overviews

mainwindow.cpp Example File
richtext/syntaxhighlighter/mainwindow.cpp

 /****************************************************************************
 **
 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
 ** All rights reserved.
 ** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the examples of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:LGPL$
 ** Commercial Usage
 ** Licensees holding valid Qt Commercial licenses may use this file in
 ** accordance with the Qt Commercial License Agreement provided with the
 ** Software or, alternatively, in accordance with the terms contained in
 ** a written agreement between you and Nokia.
 **
 ** GNU Lesser General Public License Usage
 ** Alternatively, this file may be used under the terms of the GNU Lesser
 ** General Public License version 2.1 as published by the Free Software
 ** Foundation and appearing in the file LICENSE.LGPL included in the
 ** packaging of this file.  Please review the following information to
 ** ensure the GNU Lesser General Public License version 2.1 requirements
 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
 **
 ** In addition, as a special exception, Nokia gives you certain additional
 ** rights.  These rights are described in the Nokia Qt LGPL Exception
 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
 **
 ** GNU General Public License Usage
 ** Alternatively, this file may be used under the terms of the GNU
 ** General Public License version 3.0 as published by the Free Software
 ** Foundation and appearing in the file LICENSE.GPL included in the
 ** packaging of this file.  Please review the following information to
 ** ensure the GNU General Public License version 3.0 requirements will be
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** If you have questions regarding the use of this file, please contact
 ** Nokia at qt-info@nokia.com.
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 #include <QtGui>

 #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()));
 }


Copyright © 2010 Nokia Corporation and/or its subsidiary(-ies) Trademarks
Qt 4.6.3