Emergency stop works.

lib/logger.h

@@ -13,6 +13,9 @@ struct ErrorLogMessage
     std::string message;
 };
 
+struct EmergencyStopMessage
+{};
+
 struct BeginSpeedOperationLogMessage
 {
 };
@@ -73,6 +76,7 @@ class TrackFlux;
 
 typedef std::variant<std::string,
     ErrorLogMessage,
+	EmergencyStopMessage,
     TrackReadLogMessage,
     DiskReadLogMessage,
     BeginSpeedOperationLogMessage,

src/gui/customstatusbar.cc

@@ -10,6 +10,8 @@ BEGIN_EVENT_TABLE(CustomStatusBar, wxStatusBar)
 END_EVENT_TABLE()
 // clang-format on
 
+wxDEFINE_EVENT(PROGRESSBAR_STOP_EVENT, wxCommandEvent);
+
 CustomStatusBar::CustomStatusBar(wxWindow* parent, wxWindowID id):
     wxStatusBar(parent, id)
 {
@@ -36,7 +38,7 @@ CustomStatusBar::CustomStatusBar(wxWindow* parent, wxWindowID id):
     _stopButton->Bind(wxEVT_BUTTON,
         [this](auto&)
         {
-            auto* event = new wxCommandEvent(UPDATE_STATE_EVENT, 0);
+            auto* event = new wxCommandEvent(PROGRESSBAR_STOP_EVENT, 0);
             event->SetEventObject(this);
             QueueEvent(event);
         });

src/gui/main.cc

@@ -65,7 +65,7 @@ wxThread::ExitCode FluxEngineApp::Entry()
 	}
 	catch (const EmergencyStopException& e)
 	{
-		Logger() << "Emergency stop!\n";
+		Logger() << EmergencyStopMessage();
 	}
 
 	runOnUiThread(

src/gui/mainwindow.cc

@@ -123,6 +123,12 @@ public:
         UpdateState();
 
         CreateStatusBar();
+
+        _statusBar->Bind(PROGRESSBAR_STOP_EVENT,
+            [this](auto&)
+            {
+                emergencyStop = true;
+            });
     }
 
     void OnExit(wxCommandEvent& event)
@@ -172,11 +178,6 @@ public:
         UpdateState();
     }
 
-    void OnStopButton(wxCommandEvent&)
-    {
-        emergencyStop = true;
-    }
-
     void OnReadButton(wxCommandEvent&)
     {
         try
@@ -478,11 +479,23 @@ public:
                 {
                 },
 
+                /* We terminated due to the stop button. */
+                [&](const EmergencyStopMessage& m)
+                {
+                    _statusBar->SetLeftLabel("Emergency stop!");
+					_statusBar->HideProgressBar();
+					_statusBar->SetRightLabel("");
+                    _state = _errorState;
+                    UpdateState();
+                },
+
                 /* A fatal error. */
                 [&](const ErrorLogMessage& m)
                 {
                     _statusBar->SetLeftLabel(m.message);
                     wxMessageBox(m.message, "Error", wxOK | wxICON_ERROR);
+					_statusBar->HideProgressBar();
+					_statusBar->SetRightLabel("");
                     _state = _errorState;
                     UpdateState();
                 },