Method importMap

src/gui/map/map_editor.cpp:4262–4301

QHash<const Symbol*, Symbol*> MapEditorController::importMap(
        Map& other,
        Map::ImportMode mode,
        QWidget* dialog_parent,
        std::vector<bool>* filter,
        int symbol_insert_pos,
        bool merge_duplicate_symbols)
{
	// Check if there is something to import
	if (other.getNumColors() == 0
	    && other.getNumSymbols() == 0
	    && other.getNumObjects() == 0)
	{
		QMessageBox::critical(dialog_parent, tr("Error"), tr("Nothing to import."));
		return {};
	}
	
	// Check scale
	if ((mode & 0x0f) != Map::ColorImport
	    && other.getNumSymbols() > 0
	    && other.getScaleDenominator() != map->getScaleDenominator())
	{
		/// \todo Move message to this context.
		int answer = QMessageBox::question(
		                 dialog_parent,
		                 tr("Question"),
		                 tr("The scale of the imported data is 1:%1 "
		                    "which is different from this map's scale of 1:%2.\n\n"
		                    "Rescale the imported data?")
		                 .arg(QLocale().toString(other.getScaleDenominator()),
		                      QLocale().toString(map->getScaleDenominator())),
		                 QMessageBox::Yes | QMessageBox::No | QMessageBox::Cancel, QMessageBox::Yes);
		if (answer == QMessageBox::Yes)
		{
			other.changeScale(map->getScaleDenominator(), 1.0, MapCoord(0, 0), true, true, true, true);
		}
	}
	
	return map->importMap(other, mode, filter, symbol_insert_pos, merge_duplicate_symbols);
}