Progress on config GUI:

- Finished GroupConfigSubSettingGui.
- Progress on MaterialSelectSettingGui

src/main/kotlin/xyz/alexcrea/cuanvil/group/AbstractMaterialGroup.kt

@@ -92,4 +92,6 @@ abstract class AbstractMaterialGroup(private val name: String) {
         return Material.PAPER
     }
 
+    abstract fun updateMaterials()
+
 }

src/main/kotlin/xyz/alexcrea/cuanvil/group/ExcludeGroup.kt

@@ -47,6 +47,15 @@ class ExcludeGroup(name: String) : AbstractMaterialGroup(name) {
         return includedGroup
     }
 
+    override fun updateMaterials() {
+        groupItems.clear()
+        groupItems.addAll(includedMaterial)
+
+        includedGroup.forEach { group ->
+            groupItems.addAll(group.getMaterials())
+        }
+    }
+
     override fun getMaterials(): EnumSet<Material> {
         return groupItems
     }

src/main/kotlin/xyz/alexcrea/cuanvil/group/IncludeGroup.kt

@@ -45,7 +45,15 @@ class IncludeGroup(name: String) : AbstractMaterialGroup(name) {
 
     override fun setNonGroupInheritedMaterials(materials: EnumSet<Material>) {
         super.setNonGroupInheritedMaterials(materials)
-        // Update group items
+
+        updateMaterials()
+    }
+
+    override fun getGroups(): MutableSet<AbstractMaterialGroup> {
+        return includedGroup
+    }
+
+    override fun updateMaterials() {
         groupItems.clear()
         groupItems.addAll(includedMaterial)
 
@@ -54,10 +62,6 @@ class IncludeGroup(name: String) : AbstractMaterialGroup(name) {
         }
     }
 
-    override fun getGroups(): MutableSet<AbstractMaterialGroup> {
-        return includedGroup
-    }
-
     override fun getMaterials(): EnumSet<Material> {
         return groupItems
     }