Qt 4.8: window.cpp Example File (richtext/textobject/window.cpp)

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# window.cpp Example File

richtext/textobject/window.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2015 The Qt Company Ltd.
     ** Contact: http://www.qt.io/licensing/
     **
     ** This file is part of the examples of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:BSD$
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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);
     }