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利用zxing实现由文本到二维码图片的转换
QImage ImageHandler::extractQImage(QObject *imageObj,
const double offsetX, const double offsetY,
const double width, const double height)
{
QGraphicsObject *item = qobject_cast<QGraphicsObject*>(imageObj);
if (!item) {
qDebug() << "Item is NULL";
return QImage();
}
QImage img(item->boundingRect().size().toSize(), QImage::Format_RGB32);
img.fill(QColor(255, 255, 255).rgb());
QPainter painter(&img);
QStyleOptionGraphicsItem styleOption;
item->paint(&painter, &styleOption);
if(offsetX == 0 && offsetY == 0 && width == 0 && height == 0)
return img;
else
{
return img.copy(offsetX, offsetY, width, height);
}
}
void ImageHandler::save(QObject *imageObj, const QString &path,
const double offsetX, const double offsetY,
const double width, const double height)
{
QImage img = extractQImage(imageObj, offsetX, offsetY, width, height);
img.save(path);
}