Fix block group output & expand/collapse all

Filtration.ObjectModel/ItemFilterBlockGroup.cs

@@ -57,18 +57,17 @@ namespace Filtration.ObjectModel
 
         public override string ToString()
         {
-            var currentBlockGroup = this;
+            if(ParentGroup == null)
+            {
+                return string.Empty;
+            }
 
             var outputString = (Advanced ? "~" : string.Empty) + GroupName;
 
-            // TODO: This is retarded, fix this.
+            var parentOutput = ParentGroup.ToString();
-            if (currentBlockGroup.ParentGroup != null)
+            if(!string.IsNullOrWhiteSpace(parentOutput))
             {
-                while (currentBlockGroup.ParentGroup.ParentGroup != null)
+                outputString = parentOutput + (IsLeafNode ? string.Empty : " - " + outputString);
-                {
-                    outputString = (currentBlockGroup.ParentGroup.Advanced ? "~" : string.Empty) + currentBlockGroup.ParentGroup.GroupName + " - " + outputString;
-                    currentBlockGroup = currentBlockGroup.ParentGroup;
-                }
             }
 
             return outputString;

Filtration/ViewModels/ItemFilterBlockGroupViewModel.cs

@@ -166,6 +166,15 @@ namespace Filtration.ViewModels
             }
         }
 
+        public void SetIsExpandedForAll(bool isExpanded)
+        {
+            IsExpanded = isExpanded;
+            foreach(var child in VisibleChildGroups)
+            {
+                child.SetIsExpandedForAll(isExpanded);
+            }
+        }
+
         public void RecalculateCheckState()
         {
             _isShowChecked = DetermineCheckState(true);

Filtration/ViewModels/ToolPanes/BlockGroupBrowserViewModel.cs

@@ -126,7 +126,7 @@ namespace Filtration.ViewModels.ToolPanes
         {
             foreach (var vm in BlockGroupViewModels)
             {
-                vm.IsExpanded = true;
+                vm.SetIsExpandedForAll(true);
             }
         }
 
@@ -134,7 +134,7 @@ namespace Filtration.ViewModels.ToolPanes
         {
             foreach (var vm in BlockGroupViewModels)
             {
-                vm.IsExpanded = false;
+                vm.SetIsExpandedForAll(false);
             }
         }
     }