geometry-tower-defense/Assets/GameMain/Scripts/UI/HPBarItem.cs

123 lines
3.6 KiB
C#

//------------------------------------------------------------
// Game Framework
// Copyright © 2013-2021 Jiang Yin. All rights reserved.
// Homepage: https://gameframework.cn/
// Feedback: mailto:ellan@gameframework.cn
//------------------------------------------------------------
using System.Collections;
using GeometryTD.Entity;
using GeometryTD.UI;
using UnityEngine;
using UnityEngine.UI;
using UnityGameFramework.Runtime;
namespace GeometryTD.UI
{
public class HPBarItem : MonoBehaviour
{
private const float AnimationSeconds = 0.3f;
private const float KeepSeconds = 0.4f;
private const float FadeOutSeconds = 0.3f;
[SerializeField]
private Slider m_HPBar = null;
private Canvas m_ParentCanvas = null;
private RectTransform m_CachedTransform = null;
private CanvasGroup m_CachedCanvasGroup = null;
private EntityBase m_Owner = null;
private int m_OwnerId = 0;
public EntityBase Owner
{
get
{
return m_Owner;
}
}
public void Init(EntityBase owner, Canvas parentCanvas, float fromHPRatio, float toHPRatio)
{
if (owner == null)
{
Log.Error("Owner is invalid.");
return;
}
m_ParentCanvas = parentCanvas;
gameObject.SetActive(true);
StopAllCoroutines();
m_CachedCanvasGroup.alpha = 1f;
if (m_Owner != owner || m_OwnerId != owner.Id)
{
m_HPBar.value = fromHPRatio;
m_Owner = owner;
m_OwnerId = owner.Id;
}
Refresh();
StartCoroutine(HPBarCo(toHPRatio, AnimationSeconds, KeepSeconds, FadeOutSeconds));
}
public bool Refresh()
{
if (m_CachedCanvasGroup.alpha <= 0f)
{
return false;
}
if (m_Owner != null && Owner.Available && Owner.Id == m_OwnerId)
{
Vector3 worldPosition = m_Owner.CachedTransform.position + Vector3.forward;
Vector3 screenPosition = GameEntry.Scene.MainCamera.WorldToScreenPoint(worldPosition);
Vector2 position;
if (RectTransformUtility.ScreenPointToLocalPointInRectangle((RectTransform)m_ParentCanvas.transform, screenPosition,
m_ParentCanvas.worldCamera, out position))
{
m_CachedTransform.localPosition = position;
}
}
return true;
}
public void Reset()
{
StopAllCoroutines();
m_CachedCanvasGroup.alpha = 1f;
m_HPBar.value = 1f;
m_Owner = null;
gameObject.SetActive(false);
}
private void Awake()
{
m_CachedTransform = GetComponent<RectTransform>();
if (m_CachedTransform == null)
{
Log.Error("RectTransform is invalid.");
return;
}
m_CachedCanvasGroup = GetComponent<CanvasGroup>();
if (m_CachedCanvasGroup == null)
{
Log.Error("CanvasGroup is invalid.");
return;
}
}
private IEnumerator HPBarCo(float value, float animationDuration, float keepDuration, float fadeOutDuration)
{
yield return m_HPBar.SmoothValue(value, animationDuration);
yield return new WaitForSeconds(keepDuration);
yield return m_CachedCanvasGroup.FadeToAlpha(0f, fadeOutDuration);
}
}
}