Added remove swatch context menu

PixiEditor/ViewModels/ViewModelMain.cs

@@ -52,6 +52,7 @@ namespace PixiEditor.ViewModels
         public RelayCommand DeletePixelsCommand { get; set; }
         public RelayCommand OpenResizePopupCommand { get; set; }
         public RelayCommand SelectColorCommand { get; set; }
+        public RelayCommand RemoveSwatchCommand { get; set; }
 
 
         private double _mouseXonCanvas;
@@ -202,6 +203,7 @@ namespace PixiEditor.ViewModels
             DeletePixelsCommand = new RelayCommand(DeletePixels, SelectionIsNotEmpty);
             OpenResizePopupCommand = new RelayCommand(OpenResizePopup, DocumentIsNotNull);
             SelectColorCommand = new RelayCommand(SelectColor);
+            RemoveSwatchCommand = new RelayCommand(RemoveSwatch);
             ToolSet = new ObservableCollection<Tool> {new MoveTool(), new PenTool(), new SelectTool(), new FloodFill(), new LineTool(),
             new CircleTool(), new RectangleTool(), new EarserTool(), new ColorPickerTool(), new BrightnessTool()};            
             ShortcutController = new ShortcutController
@@ -242,6 +244,19 @@ namespace PixiEditor.ViewModels
             Current = this;
         }
 
+        private void RemoveSwatch(object parameter)
+        {
+            if (!(parameter is Color))
+            {
+                throw new ArgumentException();
+            }
+            Color color = (Color)parameter;
+            if (Swatches.Contains(color)) 
+            {
+                Swatches.Remove(color);
+            }
+        }
+
         private void SelectColor(object parameter)
         {
             if(!(parameter is Color))

PixiEditor/Views/MainWindow.xaml

@@ -270,6 +270,11 @@
                                                                                        CommandParameter="{Binding}"/>
                                                         </i:EventTrigger>
                                                     </i:Interaction.Triggers>
+                                                    <Grid.ContextMenu>
+                                                        <ContextMenu>
+                                                            <MenuItem Header="Remove" Command="{Binding RemoveSwatchCommand, Source={StaticResource ViewModelMain}}" CommandParameter="{Binding}"/>
+                                                        </ContextMenu>
+                                                    </Grid.ContextMenu>
                                                 </Grid>
                                             </DataTemplate>
                                         </ItemsControl.ItemTemplate>