C++/Qt/QTextCursor
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<source lang="cpp"> /****************************************************************************
- 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();
}
</source>
Using QTextCursor
<source lang="cpp"> /****************************************************************************
- 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();
}
</source>