Improve CrudModel code quality

tests/integration/DataGridTest.h

@@ -9,7 +9,11 @@
 #include "crud/DataGridWidget.h"
 #include "Pgsql_Connection.h"
 
+#include <QCoreApplication>
+#include <QDeadlineTimer>
 #include <QSortFilterProxyModel>
+#include "catalog/PgClassContainer.h"
+#include "catalog/PgDatabaseCatalog.h"
 #include <QUrl>
 #include <memory>
 #include <optional>
@@ -41,6 +45,26 @@ protected:
 		model->setResult(db, result);
 	}
 
+	/// Shows a whole table (CRUD mode) and waits for the asynchronous load to finish
+	bool showTable(const QString &name)
+	{
+		db = openDb();
+		auto table = db->catalog()->classes()->findIf([&name](const PgClass &c)
+			{ return c.fullyQualifiedQuotedObjectName().endsWith("." + name); });
+		if (!table)
+			return false;
+		model = std::make_unique<CrudModel>();
+		widget = std::make_unique<DataGridWidget>();
+		widget->setSourceModel(model.get());
+		bool reset = false;
+		QObject::connect(model.get(), &QAbstractItemModel::modelReset, model.get(), [&reset] { reset = true; });
+		model->setConfig(db, *table);
+		QDeadlineTimer deadline(10000);
+		while (!reset && !deadline.hasExpired())
+			QCoreApplication::processEvents(QEventLoop::AllEvents, 50);
+		return reset;
+	}
+
 	/// Editable flag of every result column, as seen through the widget's proxy
 	std::vector<bool> editableColumns()
 	{