Text document blocks : QTextDocument « Qt « C++

1. C++
2. Qt
3. QTextDocument

Text document blocks

  

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**
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** Contact: Nokia Corporation (qt-info@nokia.com)
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** Alternatively, this file may be used under the terms of the GNU
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#ifndef XMLWRITER_H
#define XMLWRITER_H

#include <QDomDocument>

class QTextDocument;

class XmlWriter
{
public:
    XmlWriter(QTextDocument *document) : textDocument(document) {}
    QDomDocument *toXml();

private:
    void createItems(QDomElement &parent, const QTextBlock &block);

    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 firstBlock = textDocument->begin();
    createItems(documentElement, firstBlock);

    return document;
}

void XmlWriter::createItems(QDomElement &parent, const QTextBlock &block)
{
    QTextBlock currentBlock = block;

    while (currentBlock.isValid()) {
        QDomElement blockElement = document->createElement("block");
        blockElement.setAttribute("length", currentBlock.length());
        parent.appendChild(blockElement);

        if (!(currentBlock.text().isNull())) {
            QDomText textNode = document->createTextNode(currentBlock.text());
            blockElement.appendChild(textNode);
        }

        currentBlock = currentBlock.next();
    }
}





#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.setCodec(QTextCodec::codecForName("UTF-8"));
        
        textStream << domDocument->toString(1).toUtf8();
        file.close();
        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();
}

   
    
  

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