diff options
Diffstat (limited to 'Assets/uGUI-2017.1/UnityEngine.UI/EventSystem/EventSystem.cs')
| -rw-r--r-- | Assets/uGUI-2017.1/UnityEngine.UI/EventSystem/EventSystem.cs | 31 |
1 files changed, 20 insertions, 11 deletions
diff --git a/Assets/uGUI-2017.1/UnityEngine.UI/EventSystem/EventSystem.cs b/Assets/uGUI-2017.1/UnityEngine.UI/EventSystem/EventSystem.cs index 7ddabb8..3456e7b 100644 --- a/Assets/uGUI-2017.1/UnityEngine.UI/EventSystem/EventSystem.cs +++ b/Assets/uGUI-2017.1/UnityEngine.UI/EventSystem/EventSystem.cs @@ -9,6 +9,7 @@ namespace UnityEngine.EventSystems [AddComponentMenu("Event/Event System")] public class EventSystem : UIBehaviour { + // 获得当前EventSystem挂着的BaseInputModule的派生类，一般来说只会挂一个StandableInputModule private List<BaseInputModule> m_SystemInputModules = new List<BaseInputModule>(); private BaseInputModule m_CurrentInputModule; @@ -20,7 +21,7 @@ namespace UnityEngine.EventSystems private GameObject m_FirstSelected; [SerializeField] - private bool m_sendNavigationEvents = true; + private bool m_sendNavigationEvents = true; // Should the EventSystem allow navigation events (move / submit / cancel). public bool sendNavigationEvents { @@ -73,14 +74,15 @@ namespace UnityEngine.EventSystems protected EventSystem() {} + //c 把挂着的input modules加入m_SystemInputModules public void UpdateModules() - { - GetComponents(m_SystemInputModules); - for (int i = m_SystemInputModules.Count - 1; i >= 0; i--) + { + // 拿到当前EventSystem下面挂着的inputmodule,通常来说只会挂一个standaloneInputModule + GetComponents(m_SystemInputModules); + for (int i = m_SystemInputModules.Count - 1; i >= 0; i--) { if (m_SystemInputModules[i] && m_SystemInputModules[i].IsActive()) continue; - m_SystemInputModules.RemoveAt(i); } } @@ -177,6 +179,7 @@ namespace UnityEngine.EventSystems private static readonly Comparison<RaycastResult> s_RaycastComparer = RaycastComparer; + // 从PointerInputModule.GetTouchPointerEventData()来的触摸数据 public void RaycastAll(PointerEventData eventData, List<RaycastResult> raycastResults) { raycastResults.Clear(); @@ -193,11 +196,13 @@ namespace UnityEngine.EventSystems raycastResults.Sort(s_RaycastComparer); } + //c 是否点击到某个物体 public bool IsPointerOverGameObject() { return IsPointerOverGameObject(PointerInputModule.kMouseLeftId); } + //c 是否点击到某个物体 public bool IsPointerOverGameObject(int pointerId) { if (m_CurrentInputModule == null) @@ -233,8 +238,14 @@ namespace UnityEngine.EventSystems base.OnDisable(); } + protected virtual void OnApplicationFocus(bool hasFocus) + { + m_HasFocus = hasFocus; + } + private void TickModules() { + // 只有standaloneInputModule一个 for (var i = 0; i < m_SystemInputModules.Count; i++) { if (m_SystemInputModules[i] != null) @@ -242,17 +253,15 @@ namespace UnityEngine.EventSystems } } - protected virtual void OnApplicationFocus(bool hasFocus) - { - m_HasFocus = hasFocus; - } - + //c 事件处理跑在一个update里，以轮训的方式检测输入 protected virtual void Update() { if (current != this) return; + TickModules(); + // 将m_CurrentInputModule设置为m_SystemInputModules第一个可用的module bool changedModule = false; for (var i = 0; i < m_SystemInputModules.Count; i++) { @@ -267,7 +276,6 @@ namespace UnityEngine.EventSystems break; } } - // no event module set... set the first valid one... if (m_CurrentInputModule == null) { @@ -283,6 +291,7 @@ namespace UnityEngine.EventSystems } } + //c 执行事件处理主入口，通常情况下，如果没有自定义的inputModule，就是走StandaloneInputModule的Process if (!changedModule && m_CurrentInputModule != null) m_CurrentInputModule.Process(); } |