module-navigation-tool/Editor/Toolbar/Tools/ToolTimeScale.cs

using JetBrains.Annotations;
using UnityEditor;
using UnityEngine;
using UTools = UnityEditor.Tools;

namespace Module.NavigationTool.Editor.Toolbar
{
    [UsedImplicitly]
    internal sealed class ToolTimeScale : AbstractToolbarDrawer
    {
        public override bool Visible => ToolbarSettings.IsTimeScaleEnabled;
        public override bool Enabled => true;
        public override EToolbarPlacement Placement => EToolbarPlacement.Left;
        public override int Priority => (int)EToolbarPriority.Low;

        protected override void Draw(Rect rect)
        {
            float value = Time.timeScale;
            
            var r0 = new Rect(rect.x, rect.y - 2.0f, rect.width, rect.height * 0.5f);
            var r1 = new Rect(rect.x + 4.0f, rect.y + 2.0f, rect.width - 8.0f, rect.height * 0.5f);
            var r2 = new Rect(rect.x, r1.yMax, rect.width, rect.height * 0.5f);

            EditorGUI.LabelField(r0, "Time scale", EditorStyles.centeredGreyMiniLabel);
            EditorGUI.LabelField(r2, value.ToString("0.00"), EditorStyles.centeredGreyMiniLabel);
            float temp = GUI.HorizontalSlider(r1, value, ToolbarSettings.TimeScaleMinValue, ToolbarSettings.TimeScaleMaxValue);
            temp = Mathf.Clamp(temp, ToolbarSettings.TimeScaleMinValue, ToolbarSettings.TimeScaleMaxValue);

            if (!Mathf.Approximately(value, temp))
                Time.timeScale = temp;
        }

        public override float CalculateWidth()
        {
            return 100.0f;
        }
    }
}