window.cpp Example File

 /****************************************************************************
 **
 ** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
 ** Contact: http://www.qt-project.org/
 **
 ** This file is part of the examples of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:BSD$
 ** You may use this file under the terms of the BSD license as follows:
 **
 ** "Redistribution and use in source and binary forms, with or without
 ** modification, are permitted provided that the following conditions are
 ** met:
 **   * Redistributions of source code must retain the above copyright
 **     notice, this list of conditions and the following disclaimer.
 **   * Redistributions in binary form must reproduce the above copyright
 **     notice, this list of conditions and the following disclaimer in
 **     the documentation and/or other materials provided with the
 **     distribution.
 **   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
 **     the names of its contributors may be used to endorse or promote
 **     products derived from this software without specific prior written
 **     permission.
 **
 ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 **
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 #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;
     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);
 }