Added a layer of abstraction between RGB.NET and Artemis

This means Artemis can add extra functionality
It also avoid having to reference RGB.NET for basic rendering
Implemented rendering scaling

src/Artemis.Core/Plugins/Models/PluginSetting.cs

@@ -1,11 +1,14 @@
-using System.Threading.Tasks;
+using System;
+using System.ComponentModel;
+using System.Threading.Tasks;
 using Artemis.Storage.Entities;
 using Artemis.Storage.Repositories.Interfaces;
 using Newtonsoft.Json;
+using Stylet;
 
 namespace Artemis.Core.Plugins.Models
 {
-    public class PluginSetting<T>
+    public class PluginSetting<T> : PropertyChangedBase
     {
         // ReSharper disable once NotAccessedField.Local
         private readonly PluginInfo _pluginInfo;
@@ -20,6 +23,15 @@ namespace Artemis.Core.Plugins.Models
 
             Name = pluginSettingEntity.Name;
             Value = JsonConvert.DeserializeObject<T>(pluginSettingEntity.Value);
+
+            // PropertyChanged is for bindings, but we can use it here to create a easy to use SettingsChanged event
+            PropertyChanged += OnPropertyChanged;
+        }
+
+        private void OnPropertyChanged(object sender, PropertyChangedEventArgs e)
+        {
+            if (e.PropertyName == nameof(Value)) 
+                OnSettingChanged();
         }
 
         /// <summary>
@@ -69,5 +81,12 @@ namespace Artemis.Core.Plugins.Models
             _pluginSettingEntity.Value = JsonConvert.SerializeObject(Value);
             await _pluginSettingRepository.SaveAsync();
         }
+
+        public event EventHandler<EventArgs> SettingChanged;
+
+        protected virtual void OnSettingChanged()
+        {
+            SettingChanged?.Invoke(this, EventArgs.Empty);
+        }
     }
 }

src/Artemis.Core/Plugins/Models/PluginSettings.cs

@@ -6,6 +6,10 @@ using Newtonsoft.Json;
 
 namespace Artemis.Core.Plugins.Models
 {
+    /// <summary>
+    ///     <para>This contains all the settings for your plugin. To access a setting use <see cref="GetSetting{T}" />.</para>
+    ///     <para>To use this class, inject it into the constructor of your plugin.</para>
+    /// </summary>
     public class PluginSettings
     {
         private readonly PluginInfo _pluginInfo;
@@ -19,17 +23,27 @@ namespace Artemis.Core.Plugins.Models
             _settingEntities = pluginSettingRepository.GetByPluginGuid(_pluginInfo.Guid).ToDictionary(se => se.Name);
         }
 
+        /// <summary>
+        ///     Gets the setting with the provided name. If the setting does not exist yet, it is created.
+        /// </summary>
+        /// <typeparam name="T">The type of the setting, can be any serializable type</typeparam>
+        /// <param name="name">The name of the setting</param>
+        /// <param name="defaultValue">The default value to use if the setting does not exist yet</param>
+        /// <returns></returns>
         public PluginSetting<T> GetSetting<T>(string name, T defaultValue = default(T))
         {
-            if (_settingEntities.ContainsKey(name))
+            lock (_settingEntities)
+            {
+                if (_settingEntities.ContainsKey(name))
+                    return new PluginSetting<T>(_pluginInfo, _pluginSettingRepository, _settingEntities[name]);
+
+                var settingEntity = new PluginSettingEntity {Name = name, PluginGuid = _pluginInfo.Guid, Value = JsonConvert.SerializeObject(defaultValue)};
+                _pluginSettingRepository.Add(settingEntity);
+                _pluginSettingRepository.Save();
+
+                _settingEntities.Add(name, settingEntity);
                 return new PluginSetting<T>(_pluginInfo, _pluginSettingRepository, _settingEntities[name]);
-
-            var settingEntity = new PluginSettingEntity {Name = name, PluginGuid = _pluginInfo.Guid, Value = JsonConvert.SerializeObject(defaultValue)};
-            _pluginSettingRepository.Add(settingEntity);
-            _pluginSettingRepository.Save();
-
-            _settingEntities.Add(name, settingEntity);
-            return new PluginSetting<T>(_pluginInfo, _pluginSettingRepository, _settingEntities[name]);
+            }
         }
     }
 }