Unity Project

reference
https://cardgames.io/yahtzee/

Library/PackageCache/com.unity.timeline@1.2.15/Editor/Manipulators/Sequence/Jog.cs

@@ -0,0 +1,61 @@
+using UnityEditor.ShortcutManagement;
+using UnityEngine;
+using UnityEngine.Timeline;
+
+namespace UnityEditor.Timeline
+{
+    class Jog : Manipulator
+    {
+        Vector2 m_MouseDownOrigin = Vector2.zero;
+
+        [ClutchShortcut("Timeline/Jog", typeof(TimelineWindow), KeyCode.J)]
+        static void JogShortcut(ShortcutArguments args)
+        {
+            if (args.stage == ShortcutStage.Begin)
+            {
+                (args.context as TimelineWindow).state.isJogging = true;
+            }
+            else if (args.stage == ShortcutStage.End)
+            {
+                (args.context as TimelineWindow).state.isJogging = false;
+            }
+        }
+
+        protected override bool MouseDown(Event evt, WindowState state)
+        {
+            if (!state.isJogging)
+                return false;
+
+            m_MouseDownOrigin = evt.mousePosition;
+            state.playbackSpeed = 0.0f;
+            state.Play();
+
+            return true;
+        }
+
+        protected override bool MouseUp(Event evt, WindowState state)
+        {
+            if (!state.isJogging)
+            {
+                return false;
+            }
+
+            m_MouseDownOrigin = evt.mousePosition;
+            state.playbackSpeed = 0.0f;
+            state.Play();
+            return false;
+        }
+
+        protected override bool MouseDrag(Event evt, WindowState state)
+        {
+            if (!state.isJogging)
+                return false;
+
+            var distance = evt.mousePosition - m_MouseDownOrigin;
+
+            state.playbackSpeed = distance.x * 0.002f;
+            state.Play();
+            return true;
+        }
+    }
+}