Mega Code Archive
Svg text object
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#ifndef SVGTEXTOBJECT_H
#define SVGTEXTOBJECT_H
#include <QTextObjectInterface>
QT_BEGIN_NAMESPACE
class QTextDocument;
class QTextFormat;
class QPainter;
class QRectF;
class QSizeF;
QT_END_NAMESPACE
class SvgTextObject : public QObject, public QTextObjectInterface
{
Q_OBJECT
Q_INTERFACES(QTextObjectInterface)
public:
QSizeF intrinsicSize(QTextDocument *doc, int posInDocument,
const QTextFormat &format);
void drawObject(QPainter *painter, const QRectF &rect, QTextDocument *doc,
int posInDocument, const QTextFormat &format);
};
#endif
#include <QtGui>
#include <QtSvg>
#include "svgtextobject.h"
#include "window.h"
QSizeF SvgTextObject::intrinsicSize(QTextDocument *doc, int posInDocument,
const QTextFormat &format)
{
QImage bufferedImage = qVariantValue<QImage>(format.property(Window::SvgData));
QSize size = bufferedImage.size();
if (size.height() > 25)
size *= 25.0 / (double) size.height();
return QSizeF(size);
}
void SvgTextObject::drawObject(QPainter *painter, const QRectF &rect,
QTextDocument *doc, int posInDocument,
const QTextFormat &format)
{
QImage bufferedImage = qVariantValue<QImage>(format.property(Window::SvgData));
painter->drawImage(rect, bufferedImage);
}
#ifndef WINDOW_H
#define WINDOW_H
#include <QWidget>
#include <QTextFormat>
QT_BEGIN_NAMESPACE
class QTextEdit;
class QLineEdit;
class QPushButton;
class QLabel;
QT_END_NAMESPACE
class Window : public QWidget
{
Q_OBJECT
public:
enum { SvgTextFormat = QTextFormat::UserObject + 1 };
enum SvgProperties { SvgData = 1 };
Window();
private slots:
void insertTextObject();
private:
void setupTextObject();
void setupGui();
private:
QTextEdit *textEdit;
QLabel *fileNameLabel;
QLineEdit *fileNameLineEdit;
QPushButton *insertTextObjectButton;
};
#endif
#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);
}
#include <QtGui>
#include "window.h"
int main(int argv, char **args)
{
QApplication app(argv, args);
Window window;
window.show();
return app.exec();
}
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