window.cpp Example File | Qt SVG 5.5

- Qt 5.5
- Qt SVG
- Text Object Example
- window.cpp Example File
- Qt 5.5.1 Reference Documentation

# window.cpp Example File

richtext/textobject/window.cpp

    /****************************************************************************
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    ** Copyright (C) 2015 The Qt Company Ltd.
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    ** This file is part of the examples of the Qt Toolkit.
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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);
    }