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Assets/TcgEngine/Scripts/UI/UIPanel.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.Events;
+using TcgEngine;
+
+namespace TcgEngine.UI
+{
+    /// <summary>
+    /// Base class for UI panels that can be hidden or shown, with a fade-in fade-out effect
+    /// </summary>
+
+    [RequireComponent(typeof(CanvasGroup))]
+    public class UIPanel : MonoBehaviour
+    {
+        public float display_speed = 4f;
+
+        public UnityAction onShow;
+        public UnityAction onHide;
+
+        protected CanvasGroup canvas_group;
+        protected bool visible;
+
+        protected virtual void Awake()
+        {
+            canvas_group = GetComponent<CanvasGroup>();
+            canvas_group.alpha = 0f;
+            visible = false;
+        }
+
+        protected virtual void Start()
+        {
+
+        }
+
+        protected virtual void Update()
+        {
+
+            float add = visible ? display_speed : -display_speed;
+            float alpha = Mathf.Clamp01(canvas_group.alpha + add * Time.deltaTime);
+            canvas_group.alpha = alpha;
+
+            if (!visible && alpha < 0.01f)
+                AfterHide();
+        }
+
+        public virtual void Toggle(bool instant = false)
+        {
+            if (IsVisible())
+                Hide(instant);
+            else
+                Show(instant);
+        }
+
+        public virtual void Show(bool instant = false)
+        {
+            visible = true;
+            gameObject.SetActive(true);
+
+            if (instant || display_speed < 0.01f)
+                canvas_group.alpha = 1f;
+
+            if (onShow != null)
+                onShow.Invoke();
+        }
+
+        public virtual void Hide(bool instant = false)
+        {
+            visible = false;
+            if (instant || display_speed < 0.01f)
+                canvas_group.alpha = 0f;
+
+            if (onHide != null)
+                onHide.Invoke();
+        }
+
+        public void SetVisible(bool visi)
+        {
+            if (!visible && visi)
+                Show();
+            else if (visible && !visi)
+                Hide();
+        }
+
+        public virtual void AfterHide()
+        {
+            gameObject.SetActive(false);
+        }
+
+        public bool IsVisible()
+        {
+            return visible;
+        }
+
+        public bool IsFullyVisible()
+        {
+            return visible && canvas_group.alpha > 0.99f;
+        }
+
+        public float GetAlpha()
+        {
+            return canvas_group.alpha;
+        }
+    }
+}