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using System;
using System.Text;
using UnityEngine.Serialization;
namespace UnityEngine.EventSystems
{
//c TouchInputModule被废弃了，统一在standaloneInputModule中处理
[Obsolete("TouchInputModule is no longer required as Touch input is now handled in StandaloneInputModule.")]
[AddComponentMenu("Event/Touch Input Module")]
public class TouchInputModule : PointerInputModule
{
protected TouchInputModule()
{}
// 触摸点位置
private Vector2 m_LastMousePosition;
private Vector2 m_MousePosition;
[SerializeField]
[FormerlySerializedAs("m_AllowActivationOnStandalone")]
private bool m_ForceModuleActive;
[Obsolete("allowActivationOnStandalone has been deprecated. Use forceModuleActive instead (UnityUpgradable) -> forceModuleActive")]
public bool allowActivationOnStandalone
{
get { return m_ForceModuleActive; }
set { m_ForceModuleActive = value; }
}
public bool forceModuleActive
{
get { return m_ForceModuleActive; }
set { m_ForceModuleActive = value; }
}
//c 更新鼠标（触摸点）位置
public override void UpdateModule()
{
m_LastMousePosition = m_MousePosition;
m_MousePosition = input.mousePosition;
}
public override bool IsModuleSupported()
{
return forceModuleActive || input.touchSupported;
}
public override bool ShouldActivateModule()
{
if (!base.ShouldActivateModule())
return false;
if (m_ForceModuleActive)
return true;
if (UseFakeInput())
{
bool wantsEnable = input.GetMouseButtonDown(0);
wantsEnable |= (m_MousePosition - m_LastMousePosition).sqrMagnitude > 0.0f;
return wantsEnable;
}
if (input.touchCount > 0)
return true;
return false;
}
private bool UseFakeInput()
{
return !input.touchSupported;
}
public override void Process()
{
if (UseFakeInput())
FakeTouches();
else
ProcessTouchEvents();
}
/// <summary>
/// For debugging touch-based devices using the mouse.
/// </summary>
private void FakeTouches()
{
var pointerData = GetMousePointerEventData(0);
var leftPressData = pointerData.GetButtonState(PointerEventData.InputButton.Left).eventData;
// fake touches... on press clear delta
if (leftPressData.PressedThisFrame())
leftPressData.buttonData.delta = Vector2.zero;
ProcessTouchPress(leftPressData.buttonData, leftPressData.PressedThisFrame(), leftPressData.ReleasedThisFrame());
// only process move if we are pressed...
if (input.GetMouseButton(0))
{
ProcessMove(leftPressData.buttonData);
ProcessDrag(leftPressData.buttonData);
}
}
/// <summary>
/// Process all touch events.
/// </summary>
private void ProcessTouchEvents()
{
for (int i = 0; i < input.touchCount; ++i)
{
Touch touch = input.GetTouch(i);
if (touch.type == TouchType.Indirect)
continue;
bool released;
bool pressed;
var pointer = GetTouchPointerEventData(touch, out pressed, out released);
ProcessTouchPress(pointer, pressed, released);
if (!released)
{
ProcessMove(pointer);
ProcessDrag(pointer);
}
else
RemovePointerData(pointer);
}
}
protected void ProcessTouchPress(PointerEventData pointerEvent, bool pressed, bool released)
{
var currentOverGo = pointerEvent.pointerCurrentRaycast.gameObject;
// 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;
}
// 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 (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);
// 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;
if (pointerEvent.pointerDrag != null)
ExecuteEvents.Execute(pointerEvent.pointerDrag, pointerEvent, ExecuteEvents.endDragHandler);
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;
}
}
public override void DeactivateModule()
{
base.DeactivateModule();
ClearSelection();
}
public override string ToString()
{
var sb = new StringBuilder();
sb.AppendLine(UseFakeInput() ? "Input: Faked" : "Input: Touch");
if (UseFakeInput())
{
var pointerData = GetLastPointerEventData(kMouseLeftId);
if (pointerData != null)
sb.AppendLine(pointerData.ToString());
}
else
{
foreach (var pointerEventData in m_PointerData)
sb.AppendLine(pointerEventData.ToString());
}
return sb.ToString();
}
}
}
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