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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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