+init

1 files changed, 623 insertions, 0 deletions

diff --git a/Assets/uGUI-2017.1/UnityEngine.UI/EventSystem/InputModules/StandaloneInputModule.cs b/Assets/uGUI-2017.1/UnityEngine.UI/EventSystem/InputModules/StandaloneInputModule.cs
new file mode 100644
index 0000000..592ea4d
--- /dev/null
+++ b/Assets/uGUI-2017.1/UnityEngine.UI/EventSystem/InputModules/StandaloneInputModule.cs
@@ -0,0 +1,623 @@
+/*
+ * StandaloneInputModule : 
+ *     PointerInputModule : 
+ *         BaseInputModule
+ */
+
+using System;
+using UnityEngine;
+using UnityEngine.Serialization;
+
+namespace UnityEngine.EventSystems
+{
+    [AddComponentMenu("Event/Standalone Input Module")]
+    public class StandaloneInputModule : PointerInputModule
+    {
+        private float m_PrevActionTime;
+        private Vector2 m_LastMoveVector;
+        private int m_ConsecutiveMoveCount = 0;
+
+				// 上一个鼠标位置和当前鼠标位置，每帧更新
+        private Vector2 m_LastMousePosition;
+        private Vector2 m_MousePosition;
+
+        private GameObject m_CurrentFocusedGameObject;
+
+        protected StandaloneInputModule()
+        {
+        }
+
+        [Obsolete("Mode is no longer needed on input module as it handles both mouse and keyboard simultaneously.", false)]
+        public enum InputMode
+        {
+            Mouse,
+            Buttons
+        }
+
+        [Obsolete("Mode is no longer needed on input module as it handles both mouse and keyboard simultaneously.", false)]
+        public InputMode inputMode
+        {
+            get { return InputMode.Mouse; }
+        }
+
+        [SerializeField]
+        private string m_HorizontalAxis = "Horizontal";
+
+        /// <summary>
+        /// Name of the vertical axis for movement (if axis events are used).
+        /// </summary>
+        [SerializeField]
+        private string m_VerticalAxis = "Vertical";
+
+        /// <summary>
+        /// Name of the submit button.
+        /// </summary>
+        [SerializeField]
+        private string m_SubmitButton = "Submit";
+
+        /// <summary>
+        /// Name of the submit button.
+        /// </summary>
+        [SerializeField]
+        private string m_CancelButton = "Cancel";
+
+        [SerializeField]
+        private float m_InputActionsPerSecond = 10;
+
+        [SerializeField]
+        private float m_RepeatDelay = 0.5f;
+
+        [SerializeField]
+        [FormerlySerializedAs("m_AllowActivationOnMobileDevice")]
+        private bool m_ForceModuleActive;
+
+        [Obsolete("allowActivationOnMobileDevice has been deprecated. Use forceModuleActive instead (UnityUpgradable) -> forceModuleActive")]
+        public bool allowActivationOnMobileDevice
+        {
+            get { return m_ForceModuleActive; }
+            set { m_ForceModuleActive = value; }
+        }
+
+        public bool forceModuleActive
+        {
+            get { return m_ForceModuleActive; }
+            set { m_ForceModuleActive = value; }
+        }
+
+        public float inputActionsPerSecond
+        {
+            get { return m_InputActionsPerSecond; }
+            set { m_InputActionsPerSecond = value; }
+        }
+
+        public float repeatDelay
+        {
+            get { return m_RepeatDelay; }
+            set { m_RepeatDelay = value; }
+        }
+
+        /// <summary>
+        /// Name of the horizontal axis for movement (if axis events are used).
+        /// </summary>
+        public string horizontalAxis
+        {
+            get { return m_HorizontalAxis; }
+            set { m_HorizontalAxis = value; }
+        }
+
+        /// <summary>
+        /// Name of the vertical axis for movement (if axis events are used).
+        /// </summary>
+        public string verticalAxis
+        {
+            get { return m_VerticalAxis; }
+            set { m_VerticalAxis = value; }
+        }
+
+        public string submitButton
+        {
+            get { return m_SubmitButton; }
+            set { m_SubmitButton = value; }
+        }
+
+        public string cancelButton
+        {
+            get { return m_CancelButton; }
+            set { m_CancelButton = value; }
+        }
+
+        private bool ShouldIgnoreEventsOnNoFocus()
+        {
+            switch (SystemInfo.operatingSystemFamily)
+            {
+                case OperatingSystemFamily.Windows:
+                case OperatingSystemFamily.Linux:
+                case OperatingSystemFamily.MacOSX:
+#if UNITY_EDITOR
+                    if (UnityEditor.EditorApplication.isRemoteConnected)
+                        return false;
+#endif
+                    return true;
+                default:
+                    return false;
+            }
+        }

+

+        //c! 这里只更新鼠标位置

+        public override void UpdateModule()
+        {
+			// 如果没有获取焦点，且忽略没有焦点时的事件，返回（除非开启远程连接，否则会这样）
+            if (!eventSystem.isFocused && ShouldIgnoreEventsOnNoFocus())
+                return;
+
+		    // 更新鼠标位置
+            m_LastMousePosition = m_MousePosition;
+            m_MousePosition = input.mousePosition;
+        }
+
+        public override bool IsModuleSupported()
+        {
+            return m_ForceModuleActive || input.mousePresent || input.touchSupported;
+        }
+
+        public override bool ShouldActivateModule()
+        {
+            if (!base.ShouldActivateModule())
+                return false;
+
+            var shouldActivate = m_ForceModuleActive;
+            shouldActivate |= input.GetButtonDown(m_SubmitButton);
+            shouldActivate |= input.GetButtonDown(m_CancelButton);
+            shouldActivate |= !Mathf.Approximately(input.GetAxisRaw(m_HorizontalAxis), 0.0f);
+            shouldActivate |= !Mathf.Approximately(input.GetAxisRaw(m_VerticalAxis), 0.0f);
+            shouldActivate |= (m_MousePosition - m_LastMousePosition).sqrMagnitude > 0.0f;
+            shouldActivate |= input.GetMouseButtonDown(0);
+
+            if (input.touchCount > 0)
+                shouldActivate = true;
+
+            return shouldActivate;
+        }
+
+        public override void ActivateModule()
+        {
+            if (!eventSystem.isFocused && ShouldIgnoreEventsOnNoFocus())
+                return;
+
+            base.ActivateModule();
+            m_MousePosition = input.mousePosition;
+            m_LastMousePosition = input.mousePosition;
+
+            var toSelect = eventSystem.currentSelectedGameObject;
+            if (toSelect == null)
+                toSelect = eventSystem.firstSelectedGameObject;
+
+            eventSystem.SetSelectedGameObject(toSelect, GetBaseEventData());
+        }
+
+        public override void DeactivateModule()
+        {
+            base.DeactivateModule();
+            ClearSelection();
+        }
+        
+        //c! input module事件处理主入口，每帧更新
+        public override void Process()
+        {
+            // 如果没有获取焦点，不需要处理
+            if (!eventSystem.isFocused && ShouldIgnoreEventsOnNoFocus()) 
+                return;
+
+            //event 给选中的对象发布更新事件
+            bool usedEvent = SendUpdateEventToSelectedObject();
+
+            // 如果勾上了Send Navigation Events，发送move , submit, cancel事件
+            if (eventSystem.sendNavigationEvents)
+            {
+                if (!usedEvent)
+                    usedEvent |= SendMoveEventToSelectedObject(); //event 键盘方向键移动时给eventSystem选中的对象发布IMoveHandler事件
+
+                if (!usedEvent)
+                    SendSubmitEventToSelectedObject(); //event 如果按了相应按键，发布submit或者cancel事件
+            }
+
+            // 模拟触摸或鼠标输入
+            // touch needs to take precedence because of the mouse emulation layer
+            usedEvent = ProcessTouchEvents(); //event 检测屏幕触摸，PC上没有
+
+            if(!usedEvent && input.mousePresent)
+                ProcessMouseEvent(); // 处理鼠标事件
+        }
+
+        //c 触摸事件
+        private bool ProcessTouchEvents()
+        {
+            for (int i = 0; i < input.touchCount; ++i)  //多点触控
+            {
+                Debug.Log("Touch");
+
+                Touch touch = input.GetTouch(i);
+
+                if (touch.type == TouchType.Indirect)
+                    continue;
+
+                bool released; // 这是一个手指抬起操作
+                bool pressed; // 这是一个手指放下操作
+                //
+                PointerEventData pointer = GetTouchPointerEventData(touch, out pressed, out released); // 射线检测并保存检测结果
+
+                // 处理触摸或抬起反馈，已经准备好了被触摸的物体
+                ProcessTouchPress(pointer, pressed, released);
+
+                if (!released)
+                {
+                    ProcessMove(pointer);
+                    ProcessDrag(pointer);
+                }
+                else
+                    RemovePointerData(pointer);
+            }
+            return input.touchCount > 0;
+        }
+
+        //c 处理触摸\抬起
+        protected void ProcessTouchPress(PointerEventData pointerEvent, bool pressed, bool released)
+        {
+            var currentOverGo = pointerEvent.pointerCurrentRaycast.gameObject;
+
+            // 触摸反馈
+            // PointerDown notification
+            if (pressed)
+            {
+                pointerEvent.eligibleForClick = true;
+                pointerEvent.delta = Vector2.zero;
+                pointerEvent.dragging = false;
+                pointerEvent.useDragThreshold = true;
+                pointerEvent.pressPosition = pointerEvent.position;
+                pointerEvent.pointerPressRaycast = pointerEvent.pointerCurrentRaycast;
+
+                DeselectIfSelectionChanged(currentOverGo, pointerEvent);
+
+                if (pointerEvent.pointerEnter != currentOverGo)
+                {
+                    // send a pointer enter to the touched element if it isn't the one to select...
+                    HandlePointerExitAndEnter(pointerEvent, currentOverGo);
+                    pointerEvent.pointerEnter = currentOverGo;
+                }
+
+                //event IPointerDownHandler 
+                // search for the control that will receive the press
+                // if we can't find a press handler set the press
+                // handler to be what would receive a click.
+                var newPressed = ExecuteEvents.ExecuteHierarchy(currentOverGo, pointerEvent, ExecuteEvents.pointerDownHandler);
+
+                // didnt find a press handler... search for a click handler
+                if (newPressed == null)
+                    newPressed = ExecuteEvents.GetEventHandler<IPointerClickHandler>(currentOverGo);
+
+                // Debug.Log("Pressed: " + newPressed);
+
+                float time = Time.unscaledTime;
+
+                if (newPressed == pointerEvent.lastPress)
+                {
+                    var diffTime = time - pointerEvent.clickTime;
+                    if (diffTime < 0.3f)
+                        ++pointerEvent.clickCount;
+                    else
+                        pointerEvent.clickCount = 1;
+
+                    pointerEvent.clickTime = time;
+                }
+                else
+                {
+                    pointerEvent.clickCount = 1;
+                }
+
+                pointerEvent.pointerPress = newPressed;
+                pointerEvent.rawPointerPress = currentOverGo;
+
+                pointerEvent.clickTime = time;
+
+                // Save the drag handler as well
+                pointerEvent.pointerDrag = ExecuteEvents.GetEventHandler<IDragHandler>(currentOverGo);
+
+                if (pointerEvent.pointerDrag != null)
+                    ExecuteEvents.Execute(pointerEvent.pointerDrag, pointerEvent, ExecuteEvents.initializePotentialDrag);
+            }
+
+            // 抬起反馈
+            // PointerUp notification
+            if (released)
+            {
+                // Debug.Log("Executing pressup on: " + pointer.pointerPress);
+                ExecuteEvents.Execute(pointerEvent.pointerPress, pointerEvent, ExecuteEvents.pointerUpHandler);
+
+                // Debug.Log("KeyCode: " + pointer.eventData.keyCode);
+
+                // see if we mouse up on the same element that we clicked on...
+                var pointerUpHandler = ExecuteEvents.GetEventHandler<IPointerClickHandler>(currentOverGo); // 从这个对象开始往上找，直到一个挂了继承了IPointerClickHandler的组件
+
+                // PointerClick and Drop events
+                if (pointerEvent.pointerPress == pointerUpHandler && pointerEvent.eligibleForClick) //只有在pointerPress == pointerUpHandler时才会触发click事件
+                {
+                    ExecuteEvents.Execute(pointerEvent.pointerPress, pointerEvent, ExecuteEvents.pointerClickHandler);
+                }
+                else if (pointerEvent.pointerDrag != null && pointerEvent.dragging) // 如果两者不相等，触发drop事件
+                {
+                    ExecuteEvents.ExecuteHierarchy(currentOverGo, pointerEvent, ExecuteEvents.dropHandler);
+                }
+
+                pointerEvent.eligibleForClick = false;
+                pointerEvent.pointerPress = null;
+                pointerEvent.rawPointerPress = null;
+
+                if (pointerEvent.pointerDrag != null && pointerEvent.dragging)
+                    ExecuteEvents.Execute(pointerEvent.pointerDrag, pointerEvent, ExecuteEvents.endDragHandler);
+
+                pointerEvent.dragging = false;
+                pointerEvent.pointerDrag = null;
+
+                // send exit events as we need to simulate this on touch up on touch device
+                ExecuteEvents.ExecuteHierarchy(pointerEvent.pointerEnter, pointerEvent, ExecuteEvents.pointerExitHandler);
+                pointerEvent.pointerEnter = null;
+            }
+        }
+
+        /// <summary>
+        /// Process submit keys.
+        /// </summary>
+        protected bool SendSubmitEventToSelectedObject()
+        {
+            if (eventSystem.currentSelectedGameObject == null)
+                return false;
+
+            // 发布submit事件或者cancel事件
+
+            var data = GetBaseEventData();
+            if (input.GetButtonDown(m_SubmitButton)) // 这里是Project>Input里面配置的
+                ExecuteEvents.Execute(eventSystem.currentSelectedGameObject, data, ExecuteEvents.submitHandler);
+
+            if (input.GetButtonDown(m_CancelButton))
+                ExecuteEvents.Execute(eventSystem.currentSelectedGameObject, data, ExecuteEvents.cancelHandler);
+            return data.used;
+        }
+
+        private Vector2 GetRawMoveVector()
+        {
+            Vector2 move = Vector2.zero;
+            move.x = input.GetAxisRaw(m_HorizontalAxis);
+            move.y = input.GetAxisRaw(m_VerticalAxis);
+
+            if (input.GetButtonDown(m_HorizontalAxis))
+            {
+                if (move.x < 0)
+                    move.x = -1f;
+                if (move.x > 0)
+                    move.x = 1f;
+            }
+            if (input.GetButtonDown(m_VerticalAxis))
+            {
+                if (move.y < 0)
+                    move.y = -1f;
+                if (move.y > 0)
+                    move.y = 1f;
+            }
+            return move;
+        }
+
+        /// <summary>
+        /// Process keyboard events.
+        /// </summary>
+        protected bool SendMoveEventToSelectedObject()
+        {
+            float time = Time.unscaledTime;
+
+            Vector2 movement = GetRawMoveVector();
+            if (Mathf.Approximately(movement.x, 0f) && Mathf.Approximately(movement.y, 0f)) // 如果键盘方向键没动，返回
+            {
+                m_ConsecutiveMoveCount = 0;
+                return false;
+            }
+
+            //allow即是否允许发布事件
+            // If user pressed key again, always allow event
+            bool allow = input.GetButtonDown(m_HorizontalAxis) || input.GetButtonDown(m_VerticalAxis);
+            bool similarDir = (Vector2.Dot(movement, m_LastMoveVector) > 0); // 和之前的方向是否夹角在90°以内，如果是的话说明很接近
+            if (!allow)
+            {
+                // Otherwise, user held down key or axis.
+                // If direction didn't change at least 90 degrees, wait for delay before allowing consequtive event.
+                if (similarDir && m_ConsecutiveMoveCount == 1)
+                    allow = (time > m_PrevActionTime + m_RepeatDelay);
+                // If direction changed at least 90 degree, or we already had the delay, repeat at repeat rate.
+                else
+                    allow = (time > m_PrevActionTime + 1f / m_InputActionsPerSecond);
+            }
+            if (!allow)
+                return false;
+
+            // 发布IMoveHandler事件
+
+            // Debug.Log(m_ProcessingEvent.rawType + " axis:" + m_AllowAxisEvents + " value:" + "(" + x + "," + y + ")");
+            var axisEventData = GetAxisEventData(movement.x, movement.y, 0.6f);
+
+            if (axisEventData.moveDir != MoveDirection.None)
+            {
+                ExecuteEvents.Execute(eventSystem.currentSelectedGameObject, axisEventData, ExecuteEvents.moveHandler); // IMoveHandler.OnMove
+                if (!similarDir)
+                    m_ConsecutiveMoveCount = 0;
+                m_ConsecutiveMoveCount++;
+
+                m_PrevActionTime = time;
+                m_LastMoveVector = movement;
+            }
+            else
+            {
+                m_ConsecutiveMoveCount = 0;
+            }
+
+            return axisEventData.used;
+        }
+
+        protected void ProcessMouseEvent()
+        {
+            ProcessMouseEvent(0);
+        }
+
+        [Obsolete("This method is no longer checked, overriding it with return true does nothing!")]
+        protected virtual bool ForceAutoSelect()
+        {
+            return false;
+        }
+
+        /// <summary>
+        /// Process all mouse events.
+        /// </summary>
+        protected void ProcessMouseEvent(int id)
+        {
+            var mouseData = GetMousePointerEventData(id);
+            var leftButtonData = mouseData.GetButtonState(PointerEventData.InputButton.Left).eventData;
+
+            m_CurrentFocusedGameObject = leftButtonData.buttonData.pointerCurrentRaycast.gameObject;
+
+            // Process the first mouse button fully
+            ProcessMousePress(leftButtonData);
+            ProcessMove(leftButtonData.buttonData);
+            ProcessDrag(leftButtonData.buttonData);
+
+            // Now process right / middle clicks
+            ProcessMousePress(mouseData.GetButtonState(PointerEventData.InputButton.Right).eventData);
+            ProcessDrag(mouseData.GetButtonState(PointerEventData.InputButton.Right).eventData.buttonData);
+            ProcessMousePress(mouseData.GetButtonState(PointerEventData.InputButton.Middle).eventData);
+            ProcessDrag(mouseData.GetButtonState(PointerEventData.InputButton.Middle).eventData.buttonData);
+
+            if (!Mathf.Approximately(leftButtonData.buttonData.scrollDelta.sqrMagnitude, 0.0f))
+            {
+                var scrollHandler = ExecuteEvents.GetEventHandler<IScrollHandler>(leftButtonData.buttonData.pointerCurrentRaycast.gameObject);
+                ExecuteEvents.ExecuteHierarchy(scrollHandler, leftButtonData.buttonData, ExecuteEvents.scrollHandler);
+            }
+        }
+
+        // 每帧发送一个OnUpdateSelected事件
+        protected bool SendUpdateEventToSelectedObject()
+        {
+            if (eventSystem.currentSelectedGameObject == null)
+                return false;
+
+            var data = GetBaseEventData();
+            //event 向eventSystem当前选中的gameobject发布一个更新事件IUpdateSelectedHandler，比如inputfield
+            ExecuteEvents.Execute(eventSystem.currentSelectedGameObject, data, ExecuteEvents.updateSelectedHandler);
+            return data.used;
+        }
+
+        // 处理鼠标按下事件，发送消息，调用回调
+        /// <summary>
+        /// Process the current mouse press.
+        /// </summary>
+        protected void ProcessMousePress(MouseButtonEventData data)
+        {
+            var pointerEvent = data.buttonData;
+            var currentOverGo = pointerEvent.pointerCurrentRaycast.gameObject;
+
+            // PointerDown notification
+            if (data.PressedThisFrame())
+            {
+                pointerEvent.eligibleForClick = true;
+                pointerEvent.delta = Vector2.zero;
+                pointerEvent.dragging = false;
+                pointerEvent.useDragThreshold = true;
+                pointerEvent.pressPosition = pointerEvent.position;
+                pointerEvent.pointerPressRaycast = pointerEvent.pointerCurrentRaycast;
+
+                DeselectIfSelectionChanged(currentOverGo, pointerEvent);
+
+                // search for the control that will receive the press
+                // if we can't find a press handler set the press
+                // handler to be what would receive a click.
+                var newPressed = ExecuteEvents.ExecuteHierarchy(currentOverGo, pointerEvent, ExecuteEvents.pointerDownHandler);
+
+                // didnt find a press handler... search for a click handler
+                if (newPressed == null)
+                    newPressed = ExecuteEvents.GetEventHandler<IPointerClickHandler>(currentOverGo);
+
+                // Debug.Log("Pressed: " + newPressed);
+
+                float time = Time.unscaledTime;
+
+                if (newPressed == pointerEvent.lastPress)
+                {
+                    var diffTime = time - pointerEvent.clickTime;
+                    if (diffTime < 0.3f)
+                        ++pointerEvent.clickCount;
+                    else
+                        pointerEvent.clickCount = 1;
+
+                    pointerEvent.clickTime = time;
+                }
+                else
+                {
+                    pointerEvent.clickCount = 1;
+                }
+
+                pointerEvent.pointerPress = newPressed;
+                pointerEvent.rawPointerPress = currentOverGo;
+
+                pointerEvent.clickTime = time;
+
+                // Save the drag handler as well
+                pointerEvent.pointerDrag = ExecuteEvents.GetEventHandler<IDragHandler>(currentOverGo);
+
+                if (pointerEvent.pointerDrag != null)
+                    ExecuteEvents.Execute(pointerEvent.pointerDrag, pointerEvent, ExecuteEvents.initializePotentialDrag);
+            }
+
+            // PointerUp notification
+            if (data.ReleasedThisFrame())
+            {
+                // Debug.Log("Executing pressup on: " + pointer.pointerPress);
+                ExecuteEvents.Execute(pointerEvent.pointerPress, pointerEvent, ExecuteEvents.pointerUpHandler);
+
+                // Debug.Log("KeyCode: " + pointer.eventData.keyCode);
+
+                // see if we mouse up on the same element that we clicked on...
+                var pointerUpHandler = ExecuteEvents.GetEventHandler<IPointerClickHandler>(currentOverGo);
+
+                // PointerClick and Drop events
+                if (pointerEvent.pointerPress == pointerUpHandler && pointerEvent.eligibleForClick)
+                {
+                    ExecuteEvents.Execute(pointerEvent.pointerPress, pointerEvent, ExecuteEvents.pointerClickHandler);
+                }
+                else if (pointerEvent.pointerDrag != null && pointerEvent.dragging)
+                {
+                    ExecuteEvents.ExecuteHierarchy(currentOverGo, pointerEvent, ExecuteEvents.dropHandler);
+                }
+
+                pointerEvent.eligibleForClick = false;
+                pointerEvent.pointerPress = null;
+                pointerEvent.rawPointerPress = null;
+
+                if (pointerEvent.pointerDrag != null && pointerEvent.dragging)
+                    ExecuteEvents.Execute(pointerEvent.pointerDrag, pointerEvent, ExecuteEvents.endDragHandler);
+
+                pointerEvent.dragging = false;
+                pointerEvent.pointerDrag = null;
+
+                // redo pointer enter / exit to refresh state
+                // so that if we moused over somethign that ignored it before
+                // due to having pressed on something else
+                // it now gets it.
+                if (currentOverGo != pointerEvent.pointerEnter)
+                {
+                    HandlePointerExitAndEnter(pointerEvent, null);
+                    HandlePointerExitAndEnter(pointerEvent, currentOverGo);
+                }
+            }
+        }
+
+        protected GameObject GetCurrentFocusedGameObject()
+        {
+            return m_CurrentFocusedGameObject;
+        }
+    }
+}