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Assets/Dreamteck/Splines/Editor/Components/SetDistanceWindow.cs

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+namespace Dreamteck.Splines.Editor
+{
+    using System.Collections;
+    using System.Collections.Generic;
+    using UnityEngine;
+    using UnityEditor;
+    public class DistanceWindow : EditorWindow
+    {
+        float distance = 0f;
+        DistanceReceiver rcv;
+        float length = 0f;
+        public delegate void DistanceReceiver(float distance);
+        public void Init(DistanceReceiver receiver, float totalLength)
+        {
+            rcv = receiver;
+            length = totalLength;
+            titleContent = new GUIContent("Set Distance");
+            minSize = maxSize = new Vector2(240, 90);
+        }
+
+        private void OnGUI()
+        {
+            if (Event.current.type == EventType.KeyDown && (Event.current.keyCode == KeyCode.KeypadEnter || Event.current.keyCode == KeyCode.Return))
+            {
+                rcv(distance);
+                Close();
+            }
+            distance = EditorGUILayout.FloatField("Distance", distance);
+            if (distance < 0f) distance = 0f;
+            else if (distance > length) distance = length;
+            if (distance > 0f)
+            {
+                EditorGUILayout.LabelField("Press Enter to set.", EditorStyles.centeredGreyMiniLabel);
+            }
+            EditorGUILayout.HelpBox("Enter the distance and press Enter. Current spline length: " + length, MessageType.Info);
+        }
+    }
+}