Handle errors from bad arg on write

2 files changed, 30 insertions, 2 deletions

diff --git a/grapher/Models/AccelGUI.cs b/grapher/Models/AccelGUI.cs
index c9c4ed0..15a0c0e 100644
--- a/grapher/Models/AccelGUI.cs
+++ b/grapher/Models/AccelGUI.cs
@@ -3,7 +3,6 @@ using grapher.Models.Mouse;
 using grapher.Models.Options;
 using grapher.Models.Serialized;
 using System;
-using System.Drawing;
 using System.Windows.Forms;
 
 namespace grapher
@@ -97,7 +96,7 @@ namespace grapher
             }
             else
             {
-                WriteButton.Text = "bad args";
+                throw new Exception($"Bad arguments: \n {SettingsManager.ErrorStringFrom(errors)}");
             }
         }
 
diff --git a/grapher/Models/Serialized/SettingsManager.cs b/grapher/Models/Serialized/SettingsManager.cs
index 93cf42b..416823e 100644
--- a/grapher/Models/Serialized/SettingsManager.cs
+++ b/grapher/Models/Serialized/SettingsManager.cs
@@ -2,6 +2,7 @@
 using System;
 using System.Windows.Forms;
 using System.Threading;
+using System.Text;
 
 namespace grapher.Models.Serialized
 {
@@ -47,6 +48,34 @@ namespace grapher.Models.Serialized
 
         #region Methods
 
+        public static string ErrorStringFrom(SettingsErrors errors)
+        {
+            StringBuilder builder = new StringBuilder();
+            bool yPresent = errors.y?.Count > 0;
+
+            if (yPresent)
+            {
+                builder.AppendLine("\nx:");
+            }
+
+            foreach (var error in errors.x)
+            {
+                builder.AppendLine(error);
+            }
+
+            if (yPresent)
+            {
+                builder.AppendLine("\ny:");
+
+                foreach (var error in errors.y)
+                {
+                    builder.AppendLine(error);
+                }
+            }
+
+            return builder.ToString();
+        }
+
         public SettingsErrors TryUpdateActiveSettings(DriverSettings settings)
         {
             var errors = TryUpdateAccel(settings);