UI - Added gradient editor dialog

src/Artemis.UI/Screens/Module/ProfileEditor/LayerProperties/Timeline/PropertyTimelineViewModel.cs

@@ -60,10 +60,12 @@ namespace Artemis.UI.Screens.Module.ProfileEditor.LayerProperties.Timeline
 
         public void PopulateProperties(List<LayerPropertyViewModel> properties)
         {
-            PropertyTrackViewModels.Clear();
+            var newViewModels = new List<PropertyTrackViewModel>();
             foreach (var property in properties)
-                CreateViewModels(property);
+                newViewModels.AddRange(CreateViewModels(property));
 
+            PropertyTrackViewModels.Clear();
+            PropertyTrackViewModels.AddRange(newViewModels);
             UpdateEndTime();
         }
 
@@ -112,11 +114,13 @@ namespace Artemis.UI.Screens.Module.ProfileEditor.LayerProperties.Timeline
             UpdateKeyframePositions();
         }
 
-        private void CreateViewModels(LayerPropertyViewModel property)
+        private List<PropertyTrackViewModel> CreateViewModels(LayerPropertyViewModel property)
         {
-            PropertyTrackViewModels.Add(_propertyTrackVmFactory.Create(this, property));
+            var result = new List<PropertyTrackViewModel> {_propertyTrackVmFactory.Create(this, property)};
             foreach (var child in property.Children)
-                CreateViewModels(child);
+                result.AddRange(CreateViewModels(child));
+
+            return result;
         }
 
         #region Keyframe movement

src/Artemis.UI/Screens/Module/ProfileEditor/LayerProperties/Timeline/PropertyTrackKeyframeViewModel.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Collections.Generic;
 using System.Linq;
 using System.Windows;
 using System.Windows.Input;
@@ -125,8 +126,7 @@ namespace Artemis.UI.Screens.Module.ProfileEditor.LayerProperties.Timeline
 
         private void CreateEasingViewModels()
         {
-            foreach (Easings.Functions value in Enum.GetValues(typeof(Easings.Functions)))
-                EasingViewModels.Add(new PropertyTrackEasingViewModel(this, value));
+            EasingViewModels.AddRange(Enum.GetValues(typeof(Easings.Functions)).Cast<Easings.Functions>().Select(v => new PropertyTrackEasingViewModel(this, v)));
         }
 
         public void SelectEasingMode(PropertyTrackEasingViewModel easingViewModel)

src/Artemis.UI/Screens/Module/ProfileEditor/LayerProperties/Timeline/PropertyTrackViewModel.cs

@@ -1,4 +1,5 @@
-using System.Linq;
+using System.Collections.Generic;
+using System.Linq;
 using Artemis.UI.Ninject.Factories;
 using Stylet;
 
@@ -28,20 +29,14 @@ namespace Artemis.UI.Screens.Module.ProfileEditor.LayerProperties.Timeline
         public void PopulateKeyframes()
         {
             // Remove old keyframes
-            foreach (var viewModel in KeyframeViewModels.ToList())
-            {
-                if (!LayerPropertyViewModel.LayerProperty.UntypedKeyframes.Contains(viewModel.Keyframe))
-                    KeyframeViewModels.Remove(viewModel);
-            }
+            KeyframeViewModels.RemoveRange(KeyframeViewModels.ToList().Where(vm => !LayerPropertyViewModel.LayerProperty.UntypedKeyframes.Contains(vm.Keyframe)));
 
             // Add new keyframes
-            foreach (var keyframe in LayerPropertyViewModel.LayerProperty.UntypedKeyframes)
-            {
-                if (KeyframeViewModels.Any(k => k.Keyframe == keyframe))
-                    continue;
-                KeyframeViewModels.Add(_propertyTrackKeyframeVmFactory.Create(this, keyframe));
-            }
-
+            KeyframeViewModels.AddRange(
+                LayerPropertyViewModel.LayerProperty.UntypedKeyframes
+                    .Where(k => KeyframeViewModels.All(vm => vm.Keyframe != k))
+                    .Select(k => _propertyTrackKeyframeVmFactory.Create(this, k))
+            );
             UpdateKeyframes(PropertyTimelineViewModel.LayerPropertiesViewModel.PixelsPerSecond);
         }