add independent xy accel to driver

other changes:

modifier_args type name is now settings,
which is now the type passed in driver ioctl

remove most settings/args verification from driver,
plan to let gui handle most of it

add another accel arg, rate, which is used to set
the 'accel' parameter of types which call exp (nat/sig),
might want to cap it

add (update) serializable DriverSettings (ModifierArgs) class to
gui and static methods for interop

remove properties from ManagedAccel, its now just a black box
for accessing modifier methods

add exception handling in wrapper_io to throw proper managed types

change SettingsManager::Startup to make a new settings file
if an error occurs during deserialization

change structure of accel types; how offset and weight are applied
now depend on additivity of types

remove tagged_union and add a handrolled variant/visit impl

AccelGui::UpdateActiveValueLabels currently broken for caps
and a few other args

remove gui default layout and initial natural accel setup

cli not updated

1 files changed, 10 insertions, 15 deletions

diff --git a/grapher/Models/Serialized/RawAccelSettings.cs b/grapher/Models/Serialized/RawAccelSettings.cs
index 21a7f0c..7aed917 100644
--- a/grapher/Models/Serialized/RawAccelSettings.cs
+++ b/grapher/Models/Serialized/RawAccelSettings.cs
@@ -24,17 +24,16 @@ namespace grapher.Models.Serialized
         public RawAccelSettings() { }
 
         public RawAccelSettings(
-            ManagedAccel managedAccel,
+            DriverSettings accelSettings,
             GUISettings guiSettings)
         {
-            AccelerationSettings = new modifier_args(managedAccel);
+            AccelerationSettings = accelSettings;
             GUISettings = guiSettings;
         }
 
-
         public GUISettings GUISettings { get; set; }
 
-        public modifier_args AccelerationSettings { get; set; }
+        public DriverSettings AccelerationSettings { get; set; }
 
         public static RawAccelSettings Load()
         {
@@ -42,23 +41,19 @@ namespace grapher.Models.Serialized
         }
 
         public static RawAccelSettings Load(string file)
-        {
-            if (!Exists(file))
+        {   
+            try
             {
-                throw new Exception($"Settings file does not exist at {file}");
+               return JsonConvert.DeserializeObject<RawAccelSettings>(File.ReadAllText(file), SerializerSettings);
             }
-
-            RawAccelSettings deserializedSettings;
-            try
+            catch (FileNotFoundException e)
             {
-               deserializedSettings = JsonConvert.DeserializeObject<RawAccelSettings>(File.ReadAllText(file), SerializerSettings);
+                throw new FileNotFoundException($"Settings file does not exist at {file}", e);
             }
-            catch(Exception e)
+            catch (JsonSerializationException e)
             {
-                throw new Exception($"Settings file at {file} does not contain valid Raw Accel Settings.", e);
+                throw new JsonSerializationException($"Settings file at {file} does not contain valid Raw Accel Settings.", e);
             }
-
-            return deserializedSettings;
         }
 
         public static bool Exists()