Method exportToImage

src/gui/print_widget.cpp:1247–1303

}

void PrintWidget::exportToImage()
{
	static const QString filter_template(QString::fromLatin1("%1 (%2)"));
	QStringList filters = { filter_template.arg(tr("PNG"), QString::fromLatin1("*.png")),
	                        filter_template.arg(tr("BMP"), QString::fromLatin1("*.bmp")),
	                        filter_template.arg(tr("TIFF"), QString::fromLatin1("*.tif *.tiff")),
	                        filter_template.arg(tr("JPEG"), QString::fromLatin1("*.jpg *.jpeg")),
	                        tr("All files (*.*)") };
	QString path = FileDialog::getSaveFileName(this, tr("Export map ..."), {}, filters.join(QString::fromLatin1(";;")));
	if (path.isEmpty())
		return;
	
	if (!path.endsWith(QLatin1String(".png"), Qt::CaseInsensitive)
	    && !path.endsWith(QLatin1String(".bmp"), Qt::CaseInsensitive)
	    && !path.endsWith(QLatin1String(".tif"), Qt::CaseInsensitive) && !path.endsWith(QLatin1String(".tiff"), Qt::CaseInsensitive)
	    && !path.endsWith(QLatin1String(".jpg"), Qt::CaseInsensitive) && !path.endsWith(QLatin1String(".jpeg"), Qt::CaseInsensitive) )
	{
		path.append(QString::fromLatin1(".png"));
	}
	
	qreal pixel_per_mm = map_printer->getOptions().resolution / 25.4;
	int print_width = qRound(map_printer->getPrintAreaPaperSize().width() * pixel_per_mm);
	int print_height = qRound(map_printer->getPrintAreaPaperSize().height() * pixel_per_mm);
	QImage image(print_width, print_height, QImage::Format_ARGB32_Premultiplied);
	if (image.isNull())
	{
		QMessageBox::warning(this, tr("Error"), tr("Failed to prepare the image. Not enough memory."));
		return;
	}
	
	int dots_per_meter = qRound(pixel_per_mm * 1000);
	image.setDotsPerMeterX(dots_per_meter);
	image.setDotsPerMeterY(dots_per_meter);
	
	image.fill(QColor(Qt::white));
	
#if 0  // Pointless unless drawPage drives the event loop and sends progress
	PrintProgressDialog progress(map_printer, main_window);
	progress.setWindowTitle(tr("Export map ..."));
#endif
	
	// Export the map
	QPainter p(&image);
	map_printer->drawPage(&p, map_printer->getPrintArea(), &image);
	p.end();
	if (!image.save(path))
	{
		QMessageBox::warning(this, tr("Error"), tr("Failed to save the image. Does the path exist? Do you have sufficient rights?"));
	}
	else
	{
		main_window->showStatusBarMessage(tr("Exported successfully to %1").arg(path), 4000);
		if (world_file_check->isChecked())
			exportWorldFile(path);  /// \todo Handle errors
		emit finished(0);
	}
}