logic: Ask user before reparsing the project

While the message box with the question is visible the ui is blocked. A message appears when:
* when project was edited
* when preferences were edited
* when project file has more recent changes than db
* when db has a different version than Coati

src/lib_gui/qt/view/QtMainView.cpp

@@ -1,5 +1,10 @@
 #include "qt/view/QtMainView.h"
 
+#include <chrono>
+#include <thread>
+
+#include <QMessageBox>
+
 #include "utility/logging/logging.h"
 
 #include "qt/window/QtMainWindow.h"
@@ -12,6 +17,7 @@ QtMainView::QtMainView()
 	, m_activateWindowFunctor(std::bind(&QtMainView::doActivateWindow, this))
 	, m_updateRecentProjectMenuFunctor(std::bind(&QtMainView::doUpdateRecentProjectMenu, this))
 	, m_forceLicenseScreenFunctor(std::bind(&QtMainView::doForceLicenseScreen, this, std::placeholders::_1))
+	, m_confirmFunctor(std::bind(&QtMainView::doConfirm, this, std::placeholders::_1, std::placeholders::_2))
 {
 	m_window = std::make_shared<QtMainWindow>();
 	m_window->show();
@@ -89,6 +95,30 @@ void QtMainView::updateRecentProjectMenu()
 	m_updateRecentProjectMenuFunctor();
 }
 
+int QtMainView::confirm(const std::string& message, const std::vector<std::string>& options)
+{
+	m_confirmDone = false;
+
+	m_confirmFunctor(message, options);
+
+	while (true)
+	{
+		{
+			std::lock_guard<std::mutex> lock(m_confirmMutex);
+
+			if (m_confirmDone)
+			{
+				break;
+			}
+		}
+
+		const int SLEEP_TIME_MS = 25;
+		std::this_thread::sleep_for(std::chrono::milliseconds(SLEEP_TIME_MS));
+	}
+
+	return m_confirmResult;
+}
+
 void QtMainView::handleMessage(MessageForceEnterLicense* message)
 {
 	m_forceLicenseScreenFunctor(message->licenseExpired);
@@ -144,3 +174,30 @@ void QtMainView::doForceLicenseScreen(bool expired)
 {
 	m_window->forceEnterLicense(expired);
 }
+
+void QtMainView::doConfirm(const std::string& message, const std::vector<std::string>& options)
+{
+	QMessageBox msgBox;
+	msgBox.setText(message.c_str());
+
+	for (const std::string& option : options)
+	{
+		msgBox.addButton(option.c_str(), QMessageBox::AcceptRole);
+	}
+
+	msgBox.exec();
+
+	m_confirmResult = -1;
+
+	for (int i = 0; i < msgBox.buttons().size(); i++)
+	{
+		if (msgBox.clickedButton() == msgBox.buttons().at(i))
+		{
+			m_confirmResult = i;
+			break;
+		}
+	}
+
+	std::lock_guard<std::mutex> lock(m_confirmMutex);
+	m_confirmDone = true;
+}