Centralize legacy preference storage

src/legacy_preference_storage.cpp

@@ -0,0 +1,32 @@
+#include "pch.h"
+
+#include "legacy_preference_storage.h"
+
+#include "serializer.h"
+#include "settings.h"
+
+namespace pp::panopainter {
+
+void set_legacy_integer_preference(const char* key, int value)
+{
+    Settings::set(key, Serializer::Integer(value));
+}
+
+void save_legacy_boolean_preference(const char* key, bool value)
+{
+    Settings::set(key, Serializer::Boolean(value));
+    Settings::save();
+}
+
+void save_legacy_float_preference(const char* key, float value)
+{
+    Settings::set(key, Serializer::Float(value));
+    Settings::save();
+}
+
+bool save_legacy_preferences()
+{
+    return Settings::save();
+}
+
+} // namespace pp::panopainter