window.cpp Example File

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  #include <QtWidgets>
  #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;
      svgInterface->setParent(this);
      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);
  }