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==Text block format==

<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);
QTextBlockFormat blockFormat = cursor.blockFormat();
blockFormat.setTopMargin(4);
blockFormat.setLeftMargin(4);
blockFormat.setRightMargin(4);
blockFormat.setBottomMargin(4);
cursor.setBlockFormat(blockFormat);
cursor.insertText(tr("This contains plain text inside a "
"text block with margins to keep it separate "
"from other parts of the document."));
cursor.insertBlock();

QTextBlockFormat backgroundFormat = blockFormat;
backgroundFormat.setBackground(QColor("lightGray"));
cursor.setBlockFormat(backgroundFormat);
cursor.insertText(tr("The background color of a text block can be "
"changed to highlight text."));
cursor.insertBlock();
QTextBlockFormat rightAlignedFormat = blockFormat;
rightAlignedFormat.setAlignment(Qt::AlignRight);
cursor.setBlockFormat(rightAlignedFormat);
cursor.insertText(tr("The alignment of the text within a block is "
"controlled by the alignment properties of "
"the block itself. This text block is "
"right-aligned."));
cursor.insertBlock();
QTextBlockFormat paragraphFormat = blockFormat;
paragraphFormat.setAlignment(Qt::AlignJustify);
paragraphFormat.setTextIndent(32);
cursor.setBlockFormat(paragraphFormat);
cursor.insertText(tr("Text can be formatted so that the first "
"line in a paragraph has its own margin. "
"This makes the text more readable."));
cursor.insertBlock();
QTextBlockFormat reverseFormat = blockFormat;
reverseFormat.setAlignment(Qt::AlignJustify);
reverseFormat.setTextIndent(32);
cursor.setBlockFormat(reverseFormat);
cursor.insertText(tr("The direction of the text can be reversed. "
"This is useful for right-to-left "
"languages."));
editor->setWindowTitle(tr("Text Block Formats"));
editor->resize(480, 480);
editor->show();

return app.exec();
}

</source>

==Text block fragments==

<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.
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef XMLWRITER_H
#define XMLWRITER_H
#include <QDomDocument>
class QTextDocument;
class XmlWriter
{
public:
XmlWriter(QTextDocument *document) : textDocument(document) {}
QDomDocument *toXml();
private:
void readFragment(const QTextBlock &currentBlock, QDomElement blockElement,
QDomDocument *document);
void processBlock(const QTextBlock &currentBlock);
void processFragment(const QTextFragment &currentFragment);
QDomDocument *document;
QTextDocument *textDocument;
};
#endif

#include <QtGui>
#include "xmlwriter.h"
QDomDocument *XmlWriter::toXml()
{
QDomImplementation implementation;
QDomDocumentType docType = implementation.createDocumentType(
"scribe-document", "scribe", "qt.nokia.com/scribe");
document = new QDomDocument(docType);
// ### This processing instruction is required to ensure that any kind
// of encoding is given when the document is written.
QDomProcessingInstruction process = document->createProcessingInstruction(
"xml", "version=\"1.0\" encoding=\"utf-8\"");
document->appendChild(process);
QDomElement documentElement = document->createElement("document");
document->appendChild(documentElement);

QTextBlock currentBlock = textDocument->begin();
while (currentBlock.isValid()) {
QDomElement blockElement = document->createElement("block");
document->appendChild(blockElement);
readFragment(currentBlock, blockElement, document);

processBlock(currentBlock);

currentBlock = currentBlock.next();
}

return document;
}
void XmlWriter::readFragment(const QTextBlock &currentBlock,
QDomElement blockElement,
QDomDocument *document)
{

QTextBlock::iterator it;
for (it = currentBlock.begin(); !(it.atEnd()); ++it) {
QTextFragment currentFragment = it.fragment();
if (currentFragment.isValid())

processFragment(currentFragment);

if (currentFragment.isValid()) {
QDomElement fragmentElement = document->createElement("fragment");
blockElement.appendChild(fragmentElement);
fragmentElement.setAttribute("length", currentFragment.length());
QDomText fragmentText = document->createTextNode(currentFragment.text());
fragmentElement.appendChild(fragmentText);
}
}

}
void XmlWriter::processBlock(const QTextBlock &currentBlock)
{
}
void XmlWriter::processFragment(const QTextFragment &currentFragment)
{
}

#ifndef WINDOW_H
#define WINDOW_H
#include <QMainWindow>
class QTextEdit;
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
MainWindow();
public slots:
void insertCalendar();
void saveFile();
private:
bool writeXml(const QString &fileName);
QTextEdit *editor;
};
#endif

#include <QtGui>
#include "mainwindow.h"
#include "xmlwriter.h"
MainWindow::MainWindow()
{
QMenu *fileMenu = new QMenu(tr("&File"));
QAction *saveAction = fileMenu->addAction(tr("&Save..."));
saveAction->setShortcut(tr("Ctrl+S"));
QAction *quitAction = fileMenu->addAction(tr("E&xit"));
quitAction->setShortcut(tr("Ctrl+Q"));
QMenu *insertMenu = new QMenu(tr("&Insert"));
QAction *calendarAction = insertMenu->addAction(tr("&Calendar"));
calendarAction->setShortcut(tr("Ctrl+I"));
menuBar()->addMenu(fileMenu);
menuBar()->addMenu(insertMenu);
editor = new QTextEdit(this);
connect(saveAction, SIGNAL(triggered()), this, SLOT(saveFile()));
connect(quitAction, SIGNAL(triggered()), this, SLOT(close()));
connect(calendarAction, SIGNAL(triggered()), this, SLOT(insertCalendar()));
setCentralWidget(editor);
setWindowTitle(tr("Text Document Writer"));
}
void MainWindow::saveFile()
{
QString fileName = QFileDialog::getSaveFileName(this,
tr("Save document as:"), "", tr("XML (*.xml)"));
if (!fileName.isEmpty()) {
if (writeXml(fileName))
setWindowTitle(fileName);
else
QMessageBox::warning(this, tr("Warning"),
tr("Failed to save the document."), QMessageBox::Cancel,
QMessageBox::NoButton);
}
}
void MainWindow::insertCalendar()
{
QTextCursor cursor(editor->textCursor());
cursor.movePosition(QTextCursor::Start);
QTextCharFormat format(cursor.charFormat());
format.setFontFamily("Courier");

QTextCharFormat boldFormat = format;
boldFormat.setFontWeight(QFont::Bold);
cursor.insertBlock();
cursor.insertText(" ", boldFormat);
QDate date = QDate::currentDate();
int year = date.year(), month = date.month();
for (int weekDay = 1; weekDay <= 7; ++weekDay) {
cursor.insertText(QString("%1 ").arg(QDate::shortDayName(weekDay), 3),
boldFormat);
}
cursor.insertBlock();
cursor.insertText(" ", format);
for (int column = 1; column < QDate(year, month, 1).dayOfWeek(); ++column) {
cursor.insertText(" ", format);
}
for (int day = 1; day <= date.daysInMonth(); ++day) {
int weekDay = QDate(year, month, day).dayOfWeek();
if (QDate(year, month, day) == date)
cursor.insertText(QString("%1 ").arg(day, 3), boldFormat);
else
cursor.insertText(QString("%1 ").arg(day, 3), format);
if (weekDay == 7) {
cursor.insertBlock();
cursor.insertText(" ", format);
}
}
}
bool MainWindow::writeXml(const QString &fileName)
{
XmlWriter documentWriter(editor->document());
QDomDocument *domDocument = documentWriter.toXml();
QFile file(fileName);
if (file.open(QFile::WriteOnly)) {
QTextStream textStream(&file);

textStream << domDocument->toByteArray(1);
return true;
}
else
return false;
}

#include <QtGui>
#include "mainwindow.h"
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
MainWindow *window = new MainWindow;
window->resize(640, 480);
window->show();
return app.exec();
}

</source>

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в 14:21, 25 мая 2010

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