Method loadFrom

src/gui/map/map_editor.cpp:639–699

bool MapEditorController::loadFrom(const QString& path, const FileFormat& format, QWidget* dialog_parent)
{
	if (!dialog_parent)
		dialog_parent = window;
	
	if (!map)
	{
		map = new Map();
		main_view = new MapView(this, map);
	}
#ifdef __clang_analyzer__
	// clang-analyzer-core.CallAndMessage seems to be unable to realize
	// that map != null from the previous block.
	if (!map) { return false; }
#endif
	
	auto importer = format.makeImporter(path, map, main_view);
	if (!importer)
	{
		QMessageBox::warning(dialog_parent, tr("Error"),
		                     ::OpenOrienteering::MainWindow::tr("Cannot open file:\n%1\n\n%2")
		                     .arg(path, ::OpenOrienteering::MainWindow::tr("Invalid file type.")));
		return false;
	}
	
	if (!importer->doImport())
	{
		delete map;
		map = nullptr;
		main_view = nullptr;
		
		Q_ASSERT(!importer->warnings().empty());
		QMessageBox::warning(dialog_parent, tr("Error"), importer->warnings().back());
		return false;
	}
	
	map->loadTemplateFilesAsync(*main_view, [controller = QPointer<MapEditorController>(this)](const QString& message) {
		auto* window = controller ? controller->getWindow() : nullptr;
		if (!window)
			return;
		if (message.isEmpty())
			window->clearStatusBarMessage();
		else
			window->showStatusBarMessageImmediately(message);
	});
	setMapAndView(map, main_view);
	map->setHasUnsavedChanges(false);
	if (!importer->warnings().empty())
	{
		// Display warnings asynchronously, so that map and templates get visible.
		auto warnings = importer->warnings();
		auto show_warnings = [dialog_parent, warnings]() {
			MainWindow::showMessageBox(dialog_parent,
			                           tr("Warning"),
			                           tr("The map import generated warnings."),
			                           warnings);
		};
		QTimer::singleShot(0, dialog_parent, show_warnings);