From d7f3cef4ab390564f6bf29babe807b9edd9bfdf1 Mon Sep 17 00:00:00 2001
From: goat <16760685+goaaats@users.noreply.github.com>
Date: Mon, 19 Jul 2021 12:17:07 +0200
Subject: [PATCH] feat(ComponentDemo): Add easings demo

---
 .../Internal/Windows/ComponentDemoWindow.cs   | 71 +++++++++++++++++++
 1 file changed, 71 insertions(+)

diff --git a/Dalamud/Interface/Internal/Windows/ComponentDemoWindow.cs b/Dalamud/Interface/Internal/Windows/ComponentDemoWindow.cs
index 814c7abc6..860a2ba15 100644
--- a/Dalamud/Interface/Internal/Windows/ComponentDemoWindow.cs
+++ b/Dalamud/Interface/Internal/Windows/ComponentDemoWindow.cs
@@ -2,6 +2,8 @@ using System;
 using System.Collections.Generic;
 using System.Numerics;
 
+using Dalamud.Interface.Animation;
+using Dalamud.Interface.Animation.EasingFunctions;
 using Dalamud.Interface.Colors;
 using Dalamud.Interface.Components;
 using Dalamud.Interface.Windowing;
@@ -14,7 +16,19 @@ namespace Dalamud.Interface.Internal.Windows
     /// </summary>
     internal sealed class ComponentDemoWindow : Window
     {
+        private static readonly TimeSpan DefaultEasingTime = new(0, 0, 0, 1700);
+
         private readonly List<(string Name, Action Demo)> componentDemos;
+        private readonly IReadOnlyList<Easing> easings = new Easing[]
+        {
+            new InSine(DefaultEasingTime), new OutSine(DefaultEasingTime), new InOutSine(DefaultEasingTime),
+            new InCubic(DefaultEasingTime), new OutCubic(DefaultEasingTime), new InOutCubic(DefaultEasingTime),
+            new InQuint(DefaultEasingTime), new OutQuint(DefaultEasingTime), new InOutQuint(DefaultEasingTime),
+            new InCirc(DefaultEasingTime), new OutCirc(DefaultEasingTime), new InOutCirc(DefaultEasingTime),
+            new InElastic(DefaultEasingTime), new OutElastic(DefaultEasingTime), new InOutElastic(DefaultEasingTime),
+        };
+
+        private int animationTimeMs = (int)DefaultEasingTime.TotalMilliseconds;
         private Vector4 defaultColor = ImGuiColors.DalamudOrange;
 
         /// <summary>
@@ -36,6 +50,24 @@ namespace Dalamud.Interface.Internal.Windows
             };
         }
 
+        /// <inheritdoc/>
+        public override void OnOpen()
+        {
+            foreach (var easing in this.easings)
+            {
+                easing.Restart();
+            }
+        }
+
+        /// <inheritdoc/>
+        public override void OnClose()
+        {
+            foreach (var easing in this.easings)
+            {
+                easing.Stop();
+            }
+        }
+
         /// <inheritdoc/>
         public override void Draw()
         {
@@ -50,6 +82,11 @@ namespace Dalamud.Interface.Internal.Windows
                     componentDemo.Demo();
                 }
             }
+
+            if (ImGui.CollapsingHeader("Easing animations"))
+            {
+                this.EasingsDemo();
+            }
         }
 
         private static void HelpMarkerDemo()
@@ -79,6 +116,40 @@ namespace Dalamud.Interface.Internal.Windows
             ImGuiComponents.TextWithLabel("Label", "Hover to see more", "more");
         }
 
+        private void EasingsDemo()
+        {
+            ImGui.SliderInt("Speed in MS", ref this.animationTimeMs, 200, 5000);
+
+            foreach (var easing in this.easings)
+            {
+                easing.Duration = new TimeSpan(0, 0, 0, 0, this.animationTimeMs);
+
+                if (!easing.IsRunning)
+                {
+                    easing.Start();
+                }
+
+                var cursor = ImGui.GetCursorPos();
+                var p1 = new Vector2(cursor.X + 5, cursor.Y);
+                var p2 = p1 + new Vector2(45, 0);
+                easing.Point1 = p1;
+                easing.Point2 = p2;
+                easing.Update();
+
+                if (easing.IsDone)
+                {
+                    easing.Restart();
+                }
+
+                ImGui.SetCursorPos(easing.EasedPoint);
+                ImGui.Bullet();
+
+                ImGui.SetCursorPos(cursor + new Vector2(0, 10));
+                ImGui.Text($"{easing.GetType().Name} ({easing.Value})");
+                ImGuiHelpers.ScaledDummy(5);
+            }
+        }
+
         private void ColorPickerWithPaletteDemo()
         {
             ImGui.Text("Click on the color button to use the picker.");