Method changeScale

src/core/map.cpp:518–565

}

void Map::changeScale(unsigned int new_scale_denominator, double additional_stretch, const MapCoord& scaling_center, bool scale_symbols, bool scale_objects, bool scale_georeferencing, bool scale_templates)
{
	if (new_scale_denominator == getScaleDenominator() && additional_stretch == 1.0)
		return;
	
	double factor = (getScaleDenominator() / (double)new_scale_denominator) * additional_stretch;
	
	if (scale_symbols)
		scaleAllSymbols(factor);
	if (scale_objects)
	{
		undo_manager->clear();
		scaleAllObjects(factor, scaling_center);
		if (hasPrinterConfig())
		{
			auto print_area = printer_config->print_area;
			auto center = QPointF(scaling_center);
			print_area.setTopLeft(center + factor * (print_area.topLeft() - center));
			print_area.setBottomRight(center + factor * (print_area.bottomRight() - center));
			printer_config->print_area = print_area;
		}
	}
	if (scale_georeferencing)
		georeferencing->setMapRefPoint(scaling_center + factor * (georeferencing->getMapRefPoint() - scaling_center));
	if (scale_templates)
	{
		for (int i = 0; i < getNumTemplates(); ++i)
		{
			Template* temp = getTemplate(i);
			if (temp->isTemplateGeoreferenced())
				continue;
			setTemplateAreaDirty(i);
			temp->scale(factor, scaling_center);
			setTemplateAreaDirty(i);
		}
		for (int i = 0; i < getNumClosedTemplates(); ++i)
		{
			Template* temp = getClosedTemplate(i);
			if (temp->isTemplateGeoreferenced())
				continue;
			temp->scale(factor, scaling_center);
		}
	}
	
	setScaleDenominator(new_scale_denominator);
	setOtherDirty();
	updateAllMapWidgets();
}

void Map::rotateMap(double rotation, const MapCoord& center, bool adjust_georeferencing, bool adjust_declination, bool adjust_templates)
{