C++/Qt/QTextCursor

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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the documentation 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>
QString tr(const char *text)
{
    return QApplication::translate(text, text);
}
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    QTextEdit *editor = new QTextEdit();
    QTextCursor cursor(editor->textCursor());
    cursor.movePosition(QTextCursor::Start);
    QTextCharFormat plainFormat(cursor.charFormat());
    QTextCharFormat colorFormat = plainFormat;
    colorFormat.setForeground(Qt::red);
    cursor.insertText(tr("Text can be displayed in a variety of "
                                  "different character "
                                  "formats. "), plainFormat);
    cursor.insertText(tr("We can emphasize text by making it "));
    cursor.insertText(tr("italic, give it a different color "));
    cursor.insertText(tr("to the default text color, underline it, "));
    cursor.insertText(tr("and use many other effects."));
    QString searchString = tr("text");
    QTextDocument *document = editor->document();
    QTextCursor newCursor(document);
    while (!newCursor.isNull() && !newCursor.atEnd()) {
        newCursor = document->find(searchString, newCursor);
        if (!newCursor.isNull()) {
            newCursor.movePosition(QTextCursor::WordRight,
                                   QTextCursor::KeepAnchor);
            newCursor.mergeCharFormat(colorFormat);
        }
 
    }

    editor->setWindowTitle(tr("Text Document Find"));
    editor->resize(320, 480);
    editor->show();
    return app.exec();
}


Using QTextCursor

  
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the documentation 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>
QString tr(const char *text)
{
    return QApplication::translate(text, text);
}
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    QTextEdit *editor = new QTextEdit;

    QTextDocument *document = editor->document();
    QTextCursor redCursor(document);
 
    QTextCursor blueCursor(document);

    QTextCharFormat redFormat(redCursor.charFormat());
    redFormat.setForeground(Qt::red);
    QTextCharFormat blueFormat(blueCursor.charFormat());
    blueFormat.setForeground(Qt::blue);
    redCursor.setCharFormat(redFormat);
    blueCursor.setCharFormat(blueFormat);
    for (int i = 0; i < 20; ++i) {
        if (i % 2 == 0)
            redCursor.insertText(tr("%1 ").arg(i), redFormat);
        if (i % 5 == 0)
            blueCursor.insertText(tr("%1 ").arg(i), blueFormat);
    }
    editor->setWindowTitle(tr("Text Document Cursors"));
    editor->resize(320, 480);
    editor->show();
    return app.exec();
}