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window.cpp Example File
richtext/textobject/window.cpp

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 #include <QtGui>
 #include <QtSvg>

 #include "window.h"
 #include "svgtextobject.h"

 Window::Window()
 {
     setupGui();
     setupTextObject();

     setWindowTitle("Text Object Example");
 }

 void Window::insertTextObject()
 {
     QString fileName = fileNameLineEdit->text();
     QFile file(fileName);
     if (!file.open(QIODevice::ReadOnly)) {
         QMessageBox::warning(this, tr("Error Opening File"),
                              tr("Could not open '%1'").arg(fileName));
     }

     QByteArray svgData = file.readAll();

     QTextCharFormat svgCharFormat;
     svgCharFormat.setObjectType(SvgTextFormat);
     QSvgRenderer renderer(svgData);

     QImage svgBufferImage(renderer.defaultSize(), QImage::Format_ARGB32);
     QPainter painter(&svgBufferImage);
     renderer.render(&painter, svgBufferImage.rect());

     svgCharFormat.setProperty(SvgData, svgBufferImage);

     QTextCursor cursor = textEdit->textCursor();
     cursor.insertText(QString(QChar::ObjectReplacementCharacter), svgCharFormat);
     textEdit->setTextCursor(cursor);
 }

 void Window::setupTextObject()
 {
     QObject *svgInterface = new SvgTextObject;
     textEdit->document()->documentLayout()->registerHandler(SvgTextFormat, svgInterface);
 }

 void Window::setupGui()
 {
     fileNameLabel = new QLabel(tr("Svg File Name:"));
     fileNameLineEdit = new QLineEdit;
     insertTextObjectButton = new QPushButton(tr("Insert Image"));

     fileNameLineEdit->setText("./files/heart.svg");
     connect(insertTextObjectButton, SIGNAL(clicked()),
             this, SLOT(insertTextObject()));

     QHBoxLayout *bottomLayout = new QHBoxLayout;
     bottomLayout->addWidget(fileNameLabel);
     bottomLayout->addWidget(fileNameLineEdit);
     bottomLayout->addWidget(insertTextObjectButton);

     textEdit = new QTextEdit;

     QVBoxLayout *mainLayout = new QVBoxLayout;
     mainLayout->addWidget(textEdit);
     mainLayout->addLayout(bottomLayout);

     setLayout(mainLayout);
 }