From 115f77bda0246a00f6e17469685c67746bdbd29d Mon Sep 17 00:00:00 2001
From: nirav <nirav@airmail.cc>
Date: Sat, 12 Dec 2020 07:18:36 +0000
Subject: Initial commit

---
 Assets/SampleUI/Scripts/PanelManager.cs | 96 +++++++++++++++++++++++++++++++++
 1 file changed, 96 insertions(+)
 create mode 100755 Assets/SampleUI/Scripts/PanelManager.cs

(limited to 'Assets/SampleUI/Scripts/PanelManager.cs')

diff --git a/Assets/SampleUI/Scripts/PanelManager.cs b/Assets/SampleUI/Scripts/PanelManager.cs
new file mode 100755
index 0000000..fcd6058
--- /dev/null
+++ b/Assets/SampleUI/Scripts/PanelManager.cs
@@ -0,0 +1,96 @@
+using UnityEngine;
+using UnityEngine.UI;
+using UnityEngine.EventSystems;
+using System.Collections;
+using System.Collections.Generic;
+
+public class PanelManager : MonoBehaviour {
+
+	public Animator initiallyOpen;
+
+	private int m_OpenParameterId;
+	private Animator m_Open;
+	private GameObject m_PreviouslySelected;
+
+	const string k_OpenTransitionName = "Open";
+	const string k_ClosedStateName = "Closed";
+
+	public void OnEnable()
+	{
+		m_OpenParameterId = Animator.StringToHash (k_OpenTransitionName);
+
+		if (initiallyOpen == null)
+			return;
+
+		OpenPanel(initiallyOpen);
+	}
+
+	public void OpenPanel (Animator anim)
+	{
+		if (m_Open == anim)
+			return;
+
+		anim.gameObject.SetActive(true);
+		var newPreviouslySelected = EventSystem.current.currentSelectedGameObject;
+
+		anim.transform.SetAsLastSibling();
+
+		CloseCurrent();
+
+		m_PreviouslySelected = newPreviouslySelected;
+
+		m_Open = anim;
+		m_Open.SetBool(m_OpenParameterId, true);
+
+		GameObject go = FindFirstEnabledSelectable(anim.gameObject);
+
+		SetSelected(go);
+	}
+
+	static GameObject FindFirstEnabledSelectable (GameObject gameObject)
+	{
+		GameObject go = null;
+		var selectables = gameObject.GetComponentsInChildren<Selectable> (true);
+		foreach (var selectable in selectables) {
+			if (selectable.IsActive () && selectable.IsInteractable ()) {
+				go = selectable.gameObject;
+				break;
+			}
+		}
+		return go;
+	}
+
+	public void CloseCurrent()
+	{
+		if (m_Open == null)
+			return;
+
+		m_Open.SetBool(m_OpenParameterId, false);
+		SetSelected(m_PreviouslySelected);
+		StartCoroutine(DisablePanelDeleyed(m_Open));
+		m_Open = null;
+	}
+
+	IEnumerator DisablePanelDeleyed(Animator anim)
+	{
+		bool closedStateReached = false;
+		bool wantToClose = true;
+		while (!closedStateReached && wantToClose)
+		{
+			if (!anim.IsInTransition(0))
+				closedStateReached = anim.GetCurrentAnimatorStateInfo(0).IsName(k_ClosedStateName);
+
+			wantToClose = !anim.GetBool(m_OpenParameterId);
+
+			yield return new WaitForEndOfFrame();
+		}
+
+		if (wantToClose)
+			anim.gameObject.SetActive(false);
+	}
+
+	private void SetSelected(GameObject go)
+	{
+		EventSystem.current.SetSelectedGameObject(go);
+	}
+}
-- 
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