public override void OnBeginDrag(PointerEventData eventData)
{
base.OnBeginDrag(eventData);
this.m_currentMouseState = ScrollRectMouseStatus.BeginDrag;
SendMouseStateChangedNotification(eventData);
//获取Drag的item
for (int i = 0; i < content.childCount; ++i)
{
Transform childObject = content.GetChild(i);
RectTransform childRectTransform = childObject as RectTransform;
if (RectTransformUtility.RectangleContainsScreenPoint(childRectTransform, eventData.position, eventData.enterEventCamera))
{
this.m_onDraggingItemIndex = itemTypeStart + i;
this.m_onDraggingGameObject = childObject.gameObject;
break;
}
}
if (OnDragItem != null && this.m_onDraggingGameObject != null)
{
OnDragItem(this.m_onDraggingItemIndex, this.m_onDraggingGameObject);
}
}
public override void OnEndDrag(PointerEventData eventData)
{
base.OnEndDrag(eventData);
this.m_currentMouseState = ScrollRectMouseStatus.EndDrag;
SendMouseStateChangedNotification(eventData);
this.m_onDraggingItemIndex = -1;
this.m_onDraggingGameObject = null;
}
public override void OnDrag(PointerEventData eventData)
{
if (eventData.button != PointerEventData.InputButton.Left)
{
return;
}
if (!IsActive())
{
return;
}
//使用PointerEventData 同时要使用eventData.neterEventCamera 否则这个接口会有问题
if (!RectTransformUtility.RectangleContainsScreenPoint(viewRect, eventData.position, eventData.enterEventCamera))
{
if (m_currentMouseState == ScrollRectMouseStatus.ExitScrollRect)
{
if (OnMouseExitScrollRectAndDragging != null)
{
OnMouseExitScrollRectAndDragging(eventData);
}
}
else if (m_currentMouseState == ScrollRectMouseStatus.Draging)
{
this.m_currentMouseState = ScrollRectMouseStatus.ExitScrollRect;
SendMouseStateChangedNotification(eventData);
}
return;
}
else
{
if (m_currentMouseState == ScrollRectMouseStatus.ExitScrollRect)
{
m_currentMouseState = ScrollRectMouseStatus.ReEnterScrollRect;
SendMouseStateChangedNotification(eventData);
}
}
Vector2 localCursor;
if (!RectTransformUtility.ScreenPointToLocalPointInRectangle(viewRect, eventData.position, eventData.pressEventCamera, out localCursor))
{
return;
}
this.m_currentMouseState = ScrollRectMouseStatus.Draging;
UpdateBoundsAndItems();
var pointerDelta = localCursor - m_PointerStartLocalCursor;
Vector2 position = m_ContentStartPosition + pointerDelta;
Vector2 offset = CalculateOffset(position - content.anchoredPosition);
position += offset;
if (movementType == MovementType.Elastic)
{
if (offset.x != 0)
{
position.x = position.x - RubberDelta(offset.x, m_ViewBounds.size.x) * rubberScale;
}
if (offset.y != 0)
{
position.y = position.y - RubberDelta(offset.y, m_ViewBounds.size.y) * rubberScale;
}
}
SetContentAnchoredPosition(position);
if (OnScrollRectDragging != null)
{
OnScrollRectDragging(eventData);
}
}
