Add NotificationsComponent

CringePlugins/Ui/NotificationsComponent.cs

@@ -0,0 +1,102 @@
+using CringePlugins.Abstractions;
+using HarmonyLib;
+using ImGuiNET;
+using System.Numerics;
+using VRage;
+using VRageRender;
+
+namespace CringePlugins.Ui;
+internal class NotificationsComponent : IRenderComponent
+{
+    private static int _globalNotificationId;
+    private const float TransitionTime = .5f;
+    private const float YPadding = 5f;
+
+    private static Vector2 _notificationSize = new(300, 75);
+    private static readonly List<NotificationInstruction> Notifications = [];
+
+    private static Size WindowSize => ((Form)MyVRage.Platform.Windows.Window).Size;
+
+    private static float _time;
+
+    public void OnFrame()
+    {
+        var y = 0f;
+
+        var lastY = _notificationSize.Y;
+        var viewportPos = ImGui.GetMainViewport().Pos;
+
+        
+        //todo: consider adding a limit to the number of messages that can be displayed at once
+        for (var i = Notifications.Count; i-- > 0;)
+        {
+            var lerpMult = 0f;
+            var notification = Notifications[i];
+            var startDelta = _time - notification.StartTime;
+            var endDelta = _time - notification.HideTime;
+
+            var inTransition = true;
+            if (startDelta is > 0f and < TransitionTime)
+            {
+                lerpMult = startDelta / TransitionTime;
+            }
+            else if (endDelta is > 0f and < TransitionTime)
+            {
+                lerpMult = 1f - (endDelta / TransitionTime);
+            }
+            else if (startDelta > 0f && endDelta < 0f)
+            {
+                lerpMult = 1f;
+                inTransition = false;
+            }
+
+            y += (lastY + YPadding) * EaseInOutCubic(lerpMult);
+            if (!inTransition && y < _notificationSize.Y + YPadding)
+                y = _notificationSize.Y + YPadding;
+
+            ImGui.SetNextWindowPos(new Vector2(WindowSize.Width, y * EaseInOutCubic(lerpMult)) - _notificationSize + viewportPos);
+            ImGui.SetNextWindowSize(new Vector2(_notificationSize.X, 0f));
+
+            Vector2 lastWinSize = Vector2.Zero;
+
+            if (ImGui.Begin($"notification-{notification.GlobalId}", ImGuiWindowFlags.NoMove | ImGuiWindowFlags.NoCollapse | ImGuiWindowFlags.NoTitleBar | ImGuiWindowFlags.NoResize | ImGuiWindowFlags.Tooltip))
+            {
+                notification.RenderCallback?.Invoke();
+
+                //todo: add indicator for when message will expire. probaby just want a rectangle at the bottom of the message
+                //var fraction = Math.Min(1f, (_time - notification.StartTime) / (notification.HideTime - notification.StartTime));
+                //ImGui.ProgressBar(fraction, new Vector2(_notificationSize.X, 10));
+
+                lastWinSize = ImGui.GetWindowSize();
+
+                ImGui.End();
+            }
+
+            lastY = lastWinSize.Y;
+        }
+
+
+        Notifications.RemoveAll(x => x.IsGarbage);
+        
+        _time += MyCommon.GetLastFrameDelta();
+    }
+    public static void SpawnNotification(float showTime, Action renderCallback)
+        => Notifications.Add(new NotificationInstruction(_globalNotificationId++, renderCallback, _time, _time + showTime));
+    public static void SpawnNotification(float showTime, string text)
+        => Notifications.Add(new NotificationInstruction(_globalNotificationId++, () => ImGui.TextWrapped(text), _time, _time + showTime));
+
+    private static float EaseInOutCubic(float x) => x < 0.5f
+        ? 4f * x * x * x
+        : 1f - MathF.Pow((-2f * x + 2f), 3f) / 2f;
+
+    private readonly struct NotificationInstruction(int id, Action renderCallback, float startTime, float hideTime)
+    {
+        public readonly int GlobalId = id;
+        public readonly Action RenderCallback = renderCallback;
+        public readonly float StartTime = startTime;
+        public readonly float HideTime = hideTime;
+
+        public readonly bool IsGarbage
+            => _time > HideTime + TransitionTime;
+    }
+}