4 files changed, 51 insertions, 13 deletions
diff --git a/opentrack-logic/state.hpp b/opentrack-logic/state.hpp
index bdab9afe..1c608f7a 100644
--- a/opentrack-logic/state.hpp
+++ b/opentrack-logic/state.hpp
@@ -14,7 +14,6 @@ using namespace options;
 #include "main-settings.hpp"
 #include "mappings.hpp"
 #include "selected-libraries.hpp"
-#include "tracklogger.hpp"
 #include "work.hpp"
 #include <vector>
 #include <QString>
@@ -30,5 +29,4 @@ struct State
     main_settings s;
     Mappings pose;
     mem<Work> work;
-    mem<TrackLogger> logger;
 };
diff --git a/opentrack-logic/tracklogger.hpp b/opentrack-logic/tracklogger.hpp
index 99bc71b0..65128d48 100644
--- a/opentrack-logic/tracklogger.hpp
+++ b/opentrack-logic/tracklogger.hpp
@@ -14,8 +14,6 @@ public:
     {
     }
 
-    static mem<TrackLogger> make() { return std::make_shared<TrackLogger>(); }
-
     virtual void write(const char *)
     {
     }
@@ -45,12 +43,9 @@ public:
         first_col(true)
     {
         out.open(filename.toStdString());
-        if (!out.is_open())
-            throw std::ios_base::failure("unable to open file");
     }
 
-    static mem<TrackLogger> make(const main_settings &s) { return std::static_pointer_cast<TrackLogger>(std::make_shared<TrackLoggerCSV>(s.tracklogging_filename)); }
-
+    bool is_open() const { return out.is_open(); }
     virtual void write(const char *s);
     virtual void write(const double *p, int n);
     virtual void next_line();
diff --git a/opentrack-logic/work.cpp b/opentrack-logic/work.cpp
index e5b08c18..8d00270b 100644
--- a/opentrack-logic/work.cpp
+++ b/opentrack-logic/work.cpp
@@ -1,9 +1,50 @@
 #include "work.hpp"
 
+#include <QMessageBox>
 
-Work::Work(Mappings& m, SelectedLibraries& libs, TrackLogger &logger, WId handle) :
+
+std::shared_ptr<TrackLogger> Work::make_logger(const main_settings &s)
+{
+    if (s.tracklogging_enabled)
+    {
+        if (static_cast<QString>(s.tracklogging_filename).isEmpty())
+        {
+            QMessageBox::warning(nullptr, "Logging Error",
+                "No filename given for track logging. Proceeding without logging.",
+                QMessageBox::Ok,
+                QMessageBox::NoButton);
+        }
+        else
+        {
+            auto logger = std::make_shared<TrackLoggerCSV>(s.tracklogging_filename);
+            if (!logger->is_open())
+            {
+                logger = nullptr;
+                QMessageBox::warning(nullptr, "Logging Error",
+                    "Unable to open file: " + s.tracklogging_filename + ". Proceeding  without logging.",
+                    QMessageBox::Ok,
+                    QMessageBox::NoButton);
+            }
+            else
+            {
+                /* As this function has the potential to fill up the hard drive
+                   of the unwary with junk data, a warning is in order. */
+                QMessageBox::warning(nullptr, "Logging Active",
+                    "Just a heads up. You are recoding pose data to " + s.tracklogging_filename + "!",
+                    QMessageBox::Ok,
+                    QMessageBox::NoButton);
+                return logger;
+            }
+        }
+    }
+    return std::make_shared<TrackLogger>();
+}
+
+
+Work::Work(Mappings& m, SelectedLibraries& libs, WId handle) :
     libs(libs),
-    tracker(std::make_shared<Tracker>(m, libs, logger)),
+    logger(make_logger(s)),
+    tracker(std::make_shared<Tracker>(m, libs, *logger)),
     sc(std::make_shared<Shortcuts>()),
     handle(handle),
     keys {
diff --git a/opentrack-logic/work.hpp b/opentrack-logic/work.hpp
index 6425b11c..4afb1da4 100644
--- a/opentrack-logic/work.hpp
+++ b/opentrack-logic/work.hpp
@@ -13,6 +13,7 @@
 #include "tracker.h"
 #include "shortcuts.h"
 #include "export.hpp"
+#include "tracklogger.hpp"
 
 #include <QObject>
 #include <QFrame>
@@ -25,15 +26,18 @@ struct OPENTRACK_LOGIC_EXPORT Work
 {
     using fn_t = std::function<void(bool)>;
     using key_tuple = std::tuple<key_opts&, fn_t, bool>;
-
+    main_settings s; // tracker needs settings, so settings must come before it
     SelectedLibraries& libs;
+    std::shared_ptr<TrackLogger> logger; // must come before tracker, since tracker depends on it
     std::shared_ptr<Tracker> tracker;
     std::shared_ptr<Shortcuts> sc;
     WId handle;
     std::vector<key_tuple> keys;
-    main_settings s;
 
-    Work(Mappings& m, SelectedLibraries& libs, TrackLogger &logger, WId handle);
+    Work(Mappings& m, SelectedLibraries& libs, WId handle);
     ~Work();
     void reload_shortcuts();
+
+private:
+    std::shared_ptr<TrackLogger> make_logger(const main_settings &s);
 };