Transport endpoint enumeration

src/ngscopeclient/AddInstrumentDialog.cpp

@@ -54,12 +54,14 @@ AddInstrumentDialog::AddInstrumentDialog(
 	: Dialog(
 		title,
 		string("AddInstrument") + to_string_hex(reinterpret_cast<uintptr_t>(this)),
-		ImVec2(600, 180),
+		ImVec2(600, 200),
 		session,
 		parent)
 	, m_nickname(nickname)
 	, m_selectedDriver(0)
 	, m_selectedTransport(0)
+	, m_selectedTransportType(SCPITransportType::TRANSPORT_HID)
+	, m_selectedEndpoint(0)
 	, m_selectedModel(0)
 	, m_path(path)
 {
@@ -199,6 +201,19 @@ bool AddInstrumentDialog::DoRender()
 	else if(dropdownOpen)	//suppress further bubbles if dropdown is active
 		showedBubble = true;
 
+	if(!m_endpoints.empty())
+	{	// Endpoint discovery available: create endpoint combo
+		if(Combo("Endpoint", m_endpointNames, m_selectedEndpoint, &dropdownOpen))
+		{
+			UpdatePath();
+		}
+		HelpMarker("Select the transport endpoint from the list and/or edit the path manually.");
+		ImGui::SameLine();
+		if(ImGui::Button("⟳"))
+		{
+			UpdateCombos();
+		}
+	}
 	if(ImGui::InputText("Path", &m_path))
 		m_pathEdited = !(m_path.empty() || (m_path == m_defaultPath));
 	HelpMarker(
@@ -282,11 +297,27 @@ bool AddInstrumentDialog::DoConnect(SCPITransport* transport)
 	return m_session->CreateAndAddInstrument(m_drivers[m_selectedDriver], transport, m_nickname);
 }
 
+void AddInstrumentDialog::UpdatePath()
+{
+	if(m_selectedTransportType == SCPITransportType::TRANSPORT_HID)
+	{	// Special handling for HID transport: replace the whole path with endpoint value
+		m_path = m_endpoints[m_selectedEndpoint].path;
+	}
+	else
+	{
+		size_t pos = m_path.find(':');
+		string suffix = (pos == std::string::npos) ? "" : m_path.substr(pos);
+		m_path = m_endpoints[m_selectedEndpoint].path + suffix;
+	}
+}
+
 void AddInstrumentDialog::UpdateCombos()
 {
 	// Update transoport list according to selected driver an connection string according to transport
 	string driver = m_drivers[m_selectedDriver];
 	auto supportedModels = SCPIInstrument::GetSupportedModels(driver);
+	m_endpoints.clear();
+	m_endpointNames.clear();
 	if(!supportedModels.empty())
 	{
 		m_models.clear();
@@ -315,13 +346,19 @@ void AddInstrumentDialog::UpdateCombos()
 		for(auto transport : selectedModel.supportedTransports)
 		{
 			string transportName = to_string(transport.transportType);
+			// Prepare transport type for default value
+			if(transportIndex == 0) m_selectedTransportType = transport.transportType;
 			if(m_supportedTransports.find(transportName) != m_supportedTransports.end())
 			{
 				m_transports.push_back(transportName);
-				if(transportIndex == m_selectedTransport && !m_pathEdited)
+				if(transportIndex == m_selectedTransport)
 				{
-					m_path = transport.connectionString;
-					m_defaultPath = m_path;
+					m_selectedTransportType = transport.transportType;
+					if(!m_pathEdited)
+					{
+						m_path = transport.connectionString;
+						m_defaultPath = m_path;
+					}
 				}
 				transportIndex++;
 			}
@@ -332,6 +369,25 @@ void AddInstrumentDialog::UpdateCombos()
 			if(!m_pathEdited)
 				m_path = "";
 		}
+		// Update endpoint list
+		auto endpoints = SCPITransport::EnumEndpoints(m_transports[m_selectedTransport]);
+		int endpointIndex = 0;
+		for(auto endpoint : endpoints)
+		{
+			m_endpoints.push_back(endpoint);
+			m_endpointNames.push_back(endpoint.path + " ("+ endpoint.description +")");
+			if(m_selectedTransportType == SCPITransportType::TRANSPORT_HID && (endpoint.path.rfind(m_path) == 0))
+			{	// Special handling for HID : select the endpoint matching the path provided by the driver
+				m_selectedEndpoint = endpointIndex;
+			}
+			endpointIndex++;
+		}
+		if(m_selectedEndpoint >= (int)m_endpoints.size())
+		{
+			m_selectedEndpoint = 0;
+		}
+		if(m_endpoints.size()>0)
+			UpdatePath();
 	}
 	else
 	{	// Supported transports not provided => add all transports

src/ngscopeclient/AddInstrumentDialog.h

@@ -61,6 +61,9 @@ class AddInstrumentDialog : public Dialog
 	virtual bool DoConnect(SCPITransport* transport);
 
 	void UpdateCombos();
+
+	void UpdatePath();
+
 	//GUI widget values
 	std::string m_nickname;
 	std::string m_originalNickname;
@@ -69,7 +72,11 @@ class AddInstrumentDialog : public Dialog
 	int m_selectedDriver;
 	std::vector<std::string> m_drivers;
 	int m_selectedTransport;
+	SCPITransportType m_selectedTransportType;
 	std::vector<std::string> m_transports;
+	int m_selectedEndpoint;
+	std::vector<TransportEndpoint> m_endpoints;
+	std::vector<std::string> m_endpointNames;
 	int m_selectedModel;
 	std::vector<std::string> m_models;
 	std::unordered_set<std::string> m_supportedTransports;