logic: change relative translation triggering

Relative translation mode now has three states:

- disabled
- always enabled
- enabled when not aiming

In the third mode, looking very close to center disables reltrans. The
exact values aren't final.

1 files changed, 44 insertions, 0 deletions

diff --git a/migration/20180118_00-reltrans.cpp b/migration/20180118_00-reltrans.cpp
new file mode 100644
index 00000000..ba35e7f0
--- /dev/null
+++ b/migration/20180118_00-reltrans.cpp
@@ -0,0 +1,44 @@
+#include "migration.hpp"
+#include "options/options.hpp"
+
+using namespace options;
+using namespace migrations;
+
+enum reltrans_state
+{
+    reltrans_disabled   = 0,
+    reltrans_enabled    = 1,
+    reltrans_non_center = 2,
+};
+
+static const char* old_name = "compensate-translation";
+static const char* new_name = "relative-translation-mode";
+
+struct reltrans_enum : migration
+{
+    QString unique_date() const override
+    {
+        return "20180118_00";
+    }
+
+    QString name() const override
+    {
+        return "reltrans modes";
+    }
+
+    bool should_run() const override
+    {
+        auto b = make_bundle("opentrack-ui");
+        return b->contains(old_name) && !b->contains(new_name);
+    }
+
+    void run() override
+    {
+        auto b = make_bundle("opentrack-ui");
+        bool value = b->get<bool>(old_name);
+        b->store_kv(new_name, int(value ? reltrans_enabled : reltrans_disabled));
+        b->save();
+    }
+};
+
+OPENTRACK_MIGRATION(reltrans_enum);