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<td align="right" valign="top" width="230"><img src="images/trolltech-logo.png" align="right" width="203" height="32" border="0" /></td></tr></table><h1 align="center">mainwindow.cpp Example File<br /><small><small>richtext/syntaxhighlighter/mainwindow.cpp</small></small></h1>

<pre>  /****************************************************************************

** This file is part of the documentation of the Qt Toolkit.

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** as defined by Trolltech AS of Norway and appearing in the file

** LICENSE.QPL included in the packaging of this file.

** This file may be distributed and/or modified under the terms of the

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** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE

** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

****************************************************************************/

#include <QtGui>

#include "mainwindow.h"

MainWindow::MainWindow(QWidget *parent)

: QMainWindow(parent)

{

setupFileMenu();

setupEditor();

setCentralWidget(editor);

setWindowTitle(tr("Syntax Highlighter"));

}

void MainWindow::newFile()

{

editor->clear();

}

void MainWindow::openFile(const QString &path)

{

QString fileName = path;

if (fileName.isNull())

fileName = QFileDialog::getOpenFileName(this,

tr("Open File"), "", "qmake Files (*.pro *.prf *.pri)");

if (!fileName.isEmpty()) {

QFile file(fileName);

if (file.open(QFile::ReadOnly | QFile::Text))

editor->setPlainText(file.readAll());

}

void MainWindow::setupEditor()

{

QTextCharFormat defaultFormat;

defaultFormat.setFontFamily("Courier");

defaultFormat.setFontPointSize(10);

QTextCharFormat variableFormat = defaultFormat;

variableFormat.setFontWeight(QFont::Bold);

variableFormat.setForeground(Qt::blue);

highlighter.addMapping("\\b[A-Z_]+\\b", variableFormat);

QTextCharFormat singleLineCommentFormat = defaultFormat;

singleLineCommentFormat.setBackground(QColor("#77ff77"));

highlighter.addMapping("#[^\n]*", singleLineCommentFormat);

QTextCharFormat quotationFormat = defaultFormat;

quotationFormat.setBackground(Qt::cyan);

quotationFormat.setForeground(Qt::blue);

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highlighter.addMapping("\".*\"", quotationFormat);

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QTextCharFormat functionFormat = defaultFormat;

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functionFormat.setFontItalic(true);

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functionFormat.setForeground(Qt::blue);

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highlighter.addMapping("\\b[a-z0-9_]+\\(.*\\)", functionFormat);

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editor = new QTextEdit;

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editor->setFont(defaultFormat.font());

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editor->document()->setDefaultFont(defaultFormat.font());

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highlighter.addToDocument(editor->document());

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}

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void MainWindow::setupFileMenu()

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{

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QMenu *fileMenu = new QMenu(tr("&File"), this);

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menuBar()->addMenu(fileMenu);

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fileMenu->addAction(tr("&New..."), this, SLOT(newFile()),

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QKeySequence(tr("Ctrl+N", "File|New")));

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fileMenu->addAction(tr("&Open..."), this, SLOT(openFile()),

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QKeySequence(tr("Ctrl+O", "File|Open")));

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fileMenu->addAction(tr("E&xit"), qApp, SLOT(quit()),

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QKeySequence(tr("Ctrl+Q", "File|Exit")));

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}</pre>

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