bare bones selection system

Assets/Scripts/LevelEditor/Selections.cs

@@ -0,0 +1,67 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace RhythmHeavenMania.Editor
+{
+    public class Selections : MonoBehaviour
+    {
+        public List<TimelineEventObj> eventsSelected = new List<TimelineEventObj>();
+
+        public static Selections instance { get; private set; }
+
+        private void Awake()
+        {
+            instance = this;
+        }
+
+        public void ClickSelect(TimelineEventObj eventToAdd)
+        {
+            DeselectAll();
+            eventsSelected.Add(eventToAdd);
+            eventToAdd.Select();
+        }
+
+        public void ShiftClickSelect(TimelineEventObj eventToAdd)
+        {
+            if (!eventsSelected.Contains(eventToAdd))
+            {
+                eventsSelected.Add(eventToAdd);
+                eventToAdd.Select();
+            }
+            /*else
+            {
+                eventsSelected.Remove(eventToAdd);
+                eventToAdd.DeSelect();
+            }*/
+        }
+
+        public void DragSelect(TimelineEventObj eventToAdd)
+        {
+            if (!eventsSelected.Contains(eventToAdd))
+            {
+                eventsSelected.Add(eventToAdd);
+                eventToAdd.Select();
+            }
+        }
+
+        public void DeselectAll()
+        {
+            for (int i = 0; i < eventsSelected.Count; i++)
+            {
+                eventsSelected[i].DeSelect();
+            }
+
+            eventsSelected.Clear();
+        }
+
+        public void Deselect(TimelineEventObj eventToDeselect)
+        {
+            if (eventsSelected.Contains(eventToDeselect))
+            {
+                eventsSelected.Remove(eventToDeselect);
+                eventToDeselect.DeSelect();
+            }
+        }
+    }
+}