Core - Fixed an error when enabling a module without a datamodel

Shared UI - XML comments

src/Artemis.UI.Shared/Controls/GradientPicker.xaml.cs

@@ -2,7 +2,6 @@
 using System.ComponentModel;
 using System.Runtime.CompilerServices;
 using System.Windows;
-using System.Windows.Controls;
 using System.Windows.Input;
 using Artemis.Core;
 using Artemis.UI.Shared.Properties;
@@ -14,16 +13,37 @@ namespace Artemis.UI.Shared
     /// <summary>
     ///     Interaction logic for GradientPicker.xaml
     /// </summary>
-    public partial class GradientPicker : UserControl, INotifyPropertyChanged
+    public partial class GradientPicker : INotifyPropertyChanged
     {
-        private static IColorPickerService _colorPickerService;
+        private static IColorPickerService? _colorPickerService;
         private bool _inCallback;
 
+        /// <summary>
+        ///     Creates a new instance of the <see cref="GradientPicker" /> class
+        /// </summary>
         public GradientPicker()
         {
             InitializeComponent();
         }
 
+        /// <summary>
+        ///     Gets or sets the color gradient
+        /// </summary>
+        public ColorGradient ColorGradient
+        {
+            get => (ColorGradient) GetValue(ColorGradientProperty);
+            set => SetValue(ColorGradientProperty, value);
+        }
+
+        /// <summary>
+        ///     Gets or sets the dialog host in which to show the gradient dialog
+        /// </summary>
+        public string DialogHost
+        {
+            get => (string) GetValue(DialogHostProperty);
+            set => SetValue(DialogHostProperty, value);
+        }
+
         /// <summary>
         ///     Used by the gradient picker to load saved gradients, do not touch or it'll just throw an exception
         /// </summary>
@@ -38,39 +58,35 @@ namespace Artemis.UI.Shared
         }
 
         /// <summary>
-        ///     Gets or sets the currently selected color gradient
+        ///     Occurs when the dialog has opened
         /// </summary>
-        public ColorGradient ColorGradient
-        {
-            get => (ColorGradient) GetValue(ColorGradientProperty);
-            set => SetValue(ColorGradientProperty, value);
-        }
+        public event EventHandler? DialogOpened;
 
         /// <summary>
-        ///     Gets or sets the currently selected color gradient
+        ///     Occurs when the dialog has closed
         /// </summary>
-        public string DialogHost
-        {
-            get => (string) GetValue(DialogHostProperty);
-            set => SetValue(DialogHostProperty, value);
-        }
-
-        public event PropertyChangedEventHandler PropertyChanged;
-
-        public event EventHandler DialogOpened;
-        public event EventHandler DialogClosed;
+        public event EventHandler? DialogClosed;
 
+        /// <summary>
+        ///     Invokes the <see cref="PropertyChanged" /> event
+        /// </summary>
         [NotifyPropertyChangedInvocator]
-        protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
+        protected virtual void OnPropertyChanged([CallerMemberName] string? propertyName = null)
         {
             PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
         }
 
+        /// <summary>
+        ///     Invokes the <see cref="DialogOpened" /> event
+        /// </summary>
         protected virtual void OnDialogOpened()
         {
             DialogOpened?.Invoke(this, EventArgs.Empty);
         }
 
+        /// <summary>
+        ///     Invokes the <see cref="DialogClosed" /> event
+        /// </summary>
         protected virtual void OnDialogClosed()
         {
             DialogClosed?.Invoke(this, EventArgs.Empty);
@@ -89,6 +105,9 @@ namespace Artemis.UI.Shared
 
         private void UIElement_OnMouseUp(object sender, MouseButtonEventArgs e)
         {
+            if (_colorPickerService == null)
+                return;
+
             Execute.OnUIThread(async () =>
             {
                 OnDialogOpened();
@@ -97,14 +116,26 @@ namespace Artemis.UI.Shared
             });
         }
 
+        /// <inheritdoc />
+        public event PropertyChangedEventHandler? PropertyChanged;
+
         #region Static WPF fields
 
+        /// <summary>
+        ///     Gets or sets the color gradient
+        /// </summary>
         public static readonly DependencyProperty ColorGradientProperty = DependencyProperty.Register(nameof(ColorGradient), typeof(ColorGradient), typeof(GradientPicker),
             new FrameworkPropertyMetadata(default(ColorGradient), FrameworkPropertyMetadataOptions.BindsTwoWayByDefault, ColorGradientPropertyChangedCallback));
 
+        /// <summary>
+        ///     Gets or sets the dialog host in which to show the gradient dialog
+        /// </summary>
         public static readonly DependencyProperty DialogHostProperty = DependencyProperty.Register(nameof(DialogHost), typeof(string), typeof(GradientPicker),
             new FrameworkPropertyMetadata(default(string)));
 
+        /// <summary>
+        ///     Occurs when the color gradient has changed
+        /// </summary>
         public static readonly RoutedEvent ColorGradientChangedEvent =
             EventManager.RegisterRoutedEvent(nameof(ColorGradient), RoutingStrategy.Bubble, typeof(RoutedPropertyChangedEventHandler<ColorGradient>), typeof(GradientPicker));