protected bool CanHandleEvent(EventTriggerType _nID, GameObject _specGO)
{
switch (_nID)
{
case EventTriggerType.PointerUp:
return(ExecuteEvents.CanHandleEvent <IPointerUpHandler>(_specGO));
case EventTriggerType.PointerDown:
return(ExecuteEvents.CanHandleEvent <IPointerDownHandler>(_specGO));
case EventTriggerType.PointerClick:
return(ExecuteEvents.CanHandleEvent <IPointerClickHandler>(_specGO));
default:
Debug.LogWarning("目前能冒泡的事件只使用Up,Down,Click事件");
break;
}
return(false);
}
public static GameObject GetEventHandler <T>(GameObject root) where T : IEventSystemHandler
{
GameObject result;
if (root == null)
{
result = null;
}
else
{
Transform transform = root.transform;
while (transform != null)
{
if (ExecuteEvents.CanHandleEvent <T>(transform.gameObject))
{
return(transform.gameObject);
}
transform = transform.parent;
}
result = null;
}
return(result);
}
protected override void ProcessDrag(PointerEventData pointerEvent)
{ /* used in StandaloneInputModule.ProcessToucheEvents() and StandaloneInputModule.ProcessMouseEvent(int id)
* call OnBeginDrag
* call OnPointerUp, if for some reason pointerPress != pointerDrag
* call OnDrag
*
* pointerDrag could be DragHandler, HorizontalDragHandler, or VerticalDragHandler
*/
if (pointerEvent.IsPointerMoving() && Cursor.lockState != CursorLockMode.Locked && !(pointerEvent.pointerDrag == null))
{
if (!pointerEvent.dragging && ShouldStartDrag(pointerEvent.pressPosition, pointerEvent.position, (float)base.eventSystem.pixelDragThreshold, pointerEvent.useDragThreshold))
{
ExecuteEvents.Execute <IBeginDragHandler>(pointerEvent.pointerDrag, pointerEvent, ExecuteEvents.beginDragHandler);
pointerEvent.dragging = true;
}
if (pointerEvent.dragging)
{
// if (pointerEvent.pointerPress != pointerEvent.pointerDrag)
// {
// ExecuteEvents.Execute<IPointerUpHandler>(pointerEvent.pointerPress, pointerEvent, ExecuteEvents.pointerUpHandler);
// pointerEvent.pointerPress = null;
// pointerEvent.eligibleForClick = false;
// pointerEvent.rawPointerPress = null;
// }
print("pointerDrag is " + pointerEvent.pointerDrag.gameObject.name);
if (!ExecuteEvents.CanHandleEvent <IHorizontalDragHandler>(pointerEvent.pointerDrag) && !ExecuteEvents.CanHandleEvent <IVerticalDragHandler>(pointerEvent.pointerDrag) && ExecuteEvents.CanHandleEvent <IDragHandler>(pointerEvent.pointerDrag))
{
ExecuteEvents.Execute <IDragHandler>(pointerEvent.pointerDrag, pointerEvent, ExecuteEvents.dragHandler);
}
else
{
float thresh = (float)base.eventSystem.pixelDragThreshold;
if (pointerEvent.delta.sqrMagnitude > (thresh * thresh))
{
if (Mathf.Abs(Vector2.Dot(Vector2.right, pointerEvent.delta.normalized)) > Mathf.Cos(45f * Mathf.Deg2Rad))
{
if (ExecuteEvents.CanHandleEvent <IHorizontalDragHandler>(pointerEvent.pointerDrag))
{
ExecuteEvents.Execute <IHorizontalDragHandler>(pointerEvent.pointerDrag, pointerEvent, CustomEvents.horizontalDragHandler);
}
else
{
GameObject prevPointerDrag = pointerEvent.pointerDrag;
pointerEvent.pointerDrag = ExecuteEvents.GetEventHandler <IHorizontalDragHandler>(pointerEvent.pointerCurrentRaycast.gameObject);
if (pointerEvent.pointerDrag != null)
{
// print("switch to h");
ExecuteEvents.Execute <IEndDragHandler>(prevPointerDrag, pointerEvent, ExecuteEvents.endDragHandler);
ExecuteEvents.Execute <IInitializePotentialDragHandler>(pointerEvent.pointerDrag, pointerEvent, ExecuteEvents.initializePotentialDrag);
ExecuteEvents.Execute <IBeginDragHandler>(pointerEvent.pointerDrag, pointerEvent, ExecuteEvents.beginDragHandler);
ExecuteEvents.Execute <IHorizontalDragHandler>(pointerEvent.pointerDrag, pointerEvent, CustomEvents.horizontalDragHandler);
}
else
{
// print("no handler for h");
pointerEvent.pointerDrag = prevPointerDrag;
ExecuteEvents.Execute <IDragHandler>(pointerEvent.pointerDrag, pointerEvent, ExecuteEvents.dragHandler);
}
}
}
else
{
if (ExecuteEvents.CanHandleEvent <IVerticalDragHandler>(pointerEvent.pointerDrag))
{
ExecuteEvents.Execute <IVerticalDragHandler>(pointerEvent.pointerDrag, pointerEvent, CustomEvents.verticalDragHandler);
}
else
{
GameObject prevPointerDrag = pointerEvent.pointerDrag;
pointerEvent.pointerDrag = ExecuteEvents.GetEventHandler <IVerticalDragHandler>(pointerEvent.pointerCurrentRaycast.gameObject);
if (pointerEvent.pointerDrag != null)
{
// print("switch to v");
ExecuteEvents.Execute <IEndDragHandler>(prevPointerDrag, pointerEvent, ExecuteEvents.endDragHandler);
ExecuteEvents.Execute <IInitializePotentialDragHandler>(pointerEvent.pointerDrag, pointerEvent, ExecuteEvents.initializePotentialDrag);
ExecuteEvents.Execute <IBeginDragHandler>(pointerEvent.pointerDrag, pointerEvent, ExecuteEvents.beginDragHandler);
ExecuteEvents.Execute <IVerticalDragHandler>(pointerEvent.pointerDrag, pointerEvent, CustomEvents.verticalDragHandler);
}
else
{
// print("no handler for v");
pointerEvent.pointerDrag = prevPointerDrag;
ExecuteEvents.Execute <IDragHandler>(pointerEvent.pointerDrag, pointerEvent, ExecuteEvents.dragHandler);
}
}
}
}
else
{
// print("under thresh");
if (Mathf.Abs(Vector2.Dot(Vector2.right, pointerEvent.delta.normalized)) > Mathf.Cos(45f * Mathf.Deg2Rad))
{
if (ExecuteEvents.CanHandleEvent <IHorizontalDragHandler>(pointerEvent.pointerDrag))
{
ExecuteEvents.Execute <IHorizontalDragHandler>(pointerEvent.pointerDrag, pointerEvent, CustomEvents.horizontalDragHandler);
}
else
{
ExecuteEvents.Execute <IDragHandler>(pointerEvent.pointerDrag, pointerEvent, ExecuteEvents.dragHandler);
}
}
else
{
if (ExecuteEvents.CanHandleEvent <IVerticalDragHandler>(pointerEvent.pointerDrag))
{
ExecuteEvents.Execute <IVerticalDragHandler>(pointerEvent.pointerDrag, pointerEvent, CustomEvents.verticalDragHandler);
}
else
{
ExecuteEvents.Execute <IDragHandler>(pointerEvent.pointerDrag, pointerEvent, ExecuteEvents.dragHandler);
}
}
}
}
prevDelta = pointerEvent.delta;
}
}
}
