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Resolved issue with HSS/VSS not resizing when Rect/Scene changes 

Updated HSS/VSS Visibility logic so it's more refined.

--HG--
branch : develop_5.3
release
Simon Jackson 2016-12-31 15:14:39 +00:00
parent 909589e544
commit e0c3864fb7
3 changed files with 129 additions and 43 deletions
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32
Scripts/Layout/HorizontalScrollSnap.cs
View File

@ -13,10 +13,9 @@ namespace UnityEngine.UI.Extensions
{
void Start()
{
isVertical = false;
childAnchorPoint = new Vector2(0, 0.5f);
_isVertical = false;
_childAnchorPoint = new Vector2(0, 0.5f);
DistributePages();
if(MaskArea) CalculateVisible();
_lerp = false;
_currentPage = StartingScreen;
SetScrollContainerPosition();
@ -26,6 +25,13 @@ namespace UnityEngine.UI.Extensions
{
if (!_lerp && _scroll_rect.velocity == Vector2.zero)
{
if (!_settled && !_pointerDown)
{
if (!IsRectSettledOnaPage(_screensContainer.localPosition))
{
ScrollToClosestElement();
}
}
return;
}
else if (_lerp)
@ -44,14 +50,19 @@ namespace UnityEngine.UI.Extensions
if (!_pointerDown && (_scroll_rect.velocity.x > 0.01 || _scroll_rect.velocity.x < 0.01))
{
// if the pointer is released and is moving slower than the threshold, then just land on a page
if ((_scroll_rect.velocity.x > 0 && _scroll_rect.velocity.x < SwipeVelocityThreshold) ||
(_scroll_rect.velocity.x < 0 && _scroll_rect.velocity.x > -SwipeVelocityThreshold))
if (IsRectMovingFasterThanThreshold(0))
{
ScrollToClosestElement();
}
}
}
private bool IsRectMovingFasterThanThreshold(float startingSpeed)
{
return (_scroll_rect.velocity.x > startingSpeed && _scroll_rect.velocity.x < SwipeVelocityThreshold) ||
(_scroll_rect.velocity.x < startingSpeed && _scroll_rect.velocity.x > -SwipeVelocityThreshold);
}
private void DistributePages()
{
_screens = _screensContainer.childCount;
@ -70,7 +81,7 @@ namespace UnityEngine.UI.Extensions
currentXPosition = _offset + (int)(i * pageStepValue);
child.sizeDelta = new Vector2(panelDimensions.width, panelDimensions.height);
child.anchoredPosition = new Vector2(currentXPosition, 0f);
child.anchorMin = child.anchorMax = child.pivot = childAnchorPoint;
child.anchorMin = child.anchorMax = child.pivot = _childAnchorPoint;
}
_dimension = currentXPosition + _offset * -1;
@ -135,9 +146,18 @@ namespace UnityEngine.UI.Extensions
{
_lerp = false;
DistributePages();
if (MaskArea) UpdateVisible();
SetScrollContainerPosition();
}
private void OnRectTransformDimensionsChange()
{
if (_childAnchorPoint != Vector2.zero)
{
UpdateLayout();
}
}
#region Interfaces
/// <summary>
/// Release screen to swipe

112
Scripts/Layout/ScrollSnapBase.cs
View File

@ -7,23 +7,25 @@ namespace UnityEngine.UI.Extensions
public class ScrollSnapBase : MonoBehaviour, IBeginDragHandler, IDragHandler, IPointerDownHandler, IPointerUpHandler
{
internal RectTransform _screensContainer;
internal bool isVertical;
internal bool _isVertical;
internal int _screens = 1;
internal float _scrollStartPosition;
internal float _childSize;
private float _childPos;
internal Vector2 childAnchorPoint;
private float _childPos, _maskSize;
internal Vector2 _childAnchorPoint;
internal ScrollRect _scroll_rect;
internal Vector3 _lerp_target;
internal bool _lerp;
internal bool _pointerDown = false;
internal bool _settled = true;
internal Vector3 _startPosition = new Vector3();
[Tooltip("The currently active page")]
internal int _currentPage;
internal int _previousPage;
internal int HalfNoVisibleItems;
internal int _halfNoVisibleItems;
private int _bottomItem, _topItem;
[Serializable]
public class SelectionChangeStartEvent : UnityEvent { }
@ -76,7 +78,7 @@ namespace UnityEngine.UI.Extensions
}
internal set
{
if (value != _currentPage)
if (value != _currentPage && value >= 0 && value < _screensContainer.childCount)
{
_previousPage = _currentPage;
_currentPage = value;
@ -94,14 +96,17 @@ namespace UnityEngine.UI.Extensions
public GameObject[] ChildObjects;
[SerializeField]
[Tooltip("Event fires when a user starts to change the selection")]
private SelectionChangeStartEvent m_OnSelectionChangeStartEvent = new SelectionChangeStartEvent();
public SelectionChangeStartEvent OnSelectionChangeStartEvent { get { return m_OnSelectionChangeStartEvent; } set { m_OnSelectionChangeStartEvent = value; } }
[SerializeField]
[Tooltip("Event fires as the page changes, while dragging or jumping")]
private SelectionPageChangedEvent m_OnSelectionPageChangedEvent = new SelectionPageChangedEvent();
public SelectionPageChangedEvent OnSelectionPageChangedEvent { get { return m_OnSelectionPageChangedEvent; } set { m_OnSelectionPageChangedEvent = value; } }
[SerializeField]
[Tooltip("Event fires when the page settles after a user has dragged")]
private SelectionChangeEndEvent m_OnSelectionChangeEndEvent = new SelectionChangeEndEvent();
public SelectionChangeEndEvent OnSelectionChangeEndEvent { get { return m_OnSelectionChangeEndEvent; } set { m_OnSelectionChangeEndEvent = value; } }
@ -182,33 +187,43 @@ namespace UnityEngine.UI.Extensions
}
}
internal void CalculateVisible()
{
float MaskSize = isVertical ? MaskArea.rect.height : MaskArea.rect.width;
HalfNoVisibleItems = (int)Math.Round(MaskSize / (_childSize * MaskBuffer), MidpointRounding.AwayFromZero) / 2 + 2;
int StartingItemsBefore = StartingScreen - HalfNoVisibleItems < 0 ? 0 : HalfNoVisibleItems;
int StartingItemsAfter = _screensContainer.childCount - StartingScreen < HalfNoVisibleItems ? _screensContainer.childCount - StartingScreen : HalfNoVisibleItems;
for (int i = StartingScreen - StartingItemsBefore; i < StartingScreen + StartingItemsAfter - 1; i++)
{
ChildObjects[i].SetActive(true);
}
}
internal void UpdateVisible()
{
//If there are no objects in the scene, exit
if (ChildObjects == null || ChildObjects.Length < 1 || _screensContainer.childCount < 1) return;
//If there are no objects in the scene or a mask, exit
if (!MaskArea && (ChildObjects == null || ChildObjects.Length < 1 || _screensContainer.childCount < 1)) return;
int BottomItem = _currentPage - HalfNoVisibleItems < 0 ? 0 : HalfNoVisibleItems;
int TopItem = _screensContainer.childCount - _currentPage < HalfNoVisibleItems ? _screensContainer.childCount - _currentPage : HalfNoVisibleItems;
for (int i = CurrentPage - BottomItem; i < CurrentPage + TopItem; i++)
_maskSize = _isVertical ? MaskArea.rect.height : MaskArea.rect.width;
_halfNoVisibleItems = (int)Math.Round(_maskSize / (_childSize * MaskBuffer), MidpointRounding.AwayFromZero) / 2;
_bottomItem = _topItem = 0;
//work out how many items below the current page can be visible
for (int i = _halfNoVisibleItems + 1; i > 0 ; i--)
{
ChildObjects[i].SetActive(true);
_bottomItem = _currentPage - i < 0 ? 0 : i;
if (_bottomItem > 0) break;
}
//work out how many items above the current page can be visible
for (int i = _halfNoVisibleItems + 1; i > 0; i--)
{
_topItem = _screensContainer.childCount - _currentPage - i < 0 ? 0 : i;
if (_topItem > 0) break;
}
//Set the active items active
for (int i = CurrentPage - _bottomItem; i < CurrentPage + _topItem; i++)
{
try
{
ChildObjects[i].SetActive(true);
}
catch
{
Debug.Log("Failed to setactive child [" + i + "]");
}
}
if (_screensContainer.childCount - _currentPage > HalfNoVisibleItems + 1) ChildObjects[CurrentPage + TopItem + 1].SetActive(false);
if(_currentPage - HalfNoVisibleItems > 0) ChildObjects[CurrentPage - BottomItem - 1].SetActive(false);
//Deactivate items out of visibility at the bottom of the ScrollRect Mask (only on scroll)
if (_currentPage > _halfNoVisibleItems) ChildObjects[CurrentPage - _bottomItem].SetActive(false);
//Deactivate items out of visibility at the top of the ScrollRect Mask (only on scroll)
if (_screensContainer.childCount - _currentPage > _topItem) ChildObjects[CurrentPage + _topItem].SetActive(false);
}
@ -256,17 +271,39 @@ namespace UnityEngine.UI.Extensions
}
}
/// <summary>
/// Gets the closest page for the current Scroll Rect container position
/// </summary>
/// <param name="pos">Position to test, normally the Scroll Rect container Local position</param>
/// <returns>Closest Page number (zero indexed array value)</returns>
internal int GetPageforPosition(Vector3 pos)
{
return isVertical ?
return _isVertical ?
-(int)Math.Round((pos.y - _scrollStartPosition) / _childSize) :
-(int)Math.Round((pos.x - _scrollStartPosition) / _childSize);
}
/// <summary>
/// Validates if the current Scroll Rect container position is within the bounds for a page
/// </summary>
/// <param name="pos">Position to test, normally the Scroll Rect container Local position</param>
/// <returns>True / False, is the position in the bounds of a page</returns>
internal bool IsRectSettledOnaPage(Vector3 pos)
{
return _isVertical ?
-((pos.y - _scrollStartPosition) / _childSize) == -(int)Math.Round((pos.y - _scrollStartPosition) / _childSize) :
-((pos.x - _scrollStartPosition) / _childSize) == -(int)Math.Round((pos.x - _scrollStartPosition) / _childSize);
}
/// <summary>
/// Returns the local position for a child page based on the required page number
/// </summary>
/// <param name="page">Page that the position is required for (Zero indexed array value)</param>
/// <param name="target">Outputs the local position for the selected page</param>
internal void GetPositionforPage(int page, ref Vector3 target)
{
_childPos = -_childSize * page;
if (isVertical)
if (_isVertical)
{
target.y = _childPos + _scrollStartPosition;
}
@ -276,6 +313,9 @@ namespace UnityEngine.UI.Extensions
}
}
/// <summary>
/// Updates the _Lerp target to the closest page and updates the pagination bullets. Each control's update loop will then handle the move.
/// </summary>
internal void ScrollToClosestElement()
{
_lerp = true;
@ -283,8 +323,10 @@ namespace UnityEngine.UI.Extensions
GetPositionforPage(_currentPage, ref _lerp_target);
ChangeBulletsInfo(_currentPage);
}
//changes the bullets on the bottom of the page - pagination
/// <summary>
/// changes the bullets on the bottom of the page - pagination
/// </summary>
/// <param name="targetScreen"></param>
internal void ChangeBulletsInfo(int targetScreen)
{
if (Pagination)
@ -314,6 +356,14 @@ namespace UnityEngine.UI.Extensions
{
MaskBuffer = 1;
}
if (PageStep < 0)
{
PageStep = 0;
}
if (PageStep > 8)
{
PageStep = 9;
}
}
/// <summary>
@ -338,6 +388,7 @@ namespace UnityEngine.UI.Extensions
internal void EndScreenChange()
{
OnSelectionChangeEndEvent.Invoke(_currentPage);
_settled = true;
}
#region Interfaces
@ -347,6 +398,7 @@ namespace UnityEngine.UI.Extensions
/// <param name="eventData"></param>
public void OnBeginDrag(PointerEventData eventData)
{
_settled = false;
StartScreenChange();
_startPosition = _screensContainer.localPosition;
}

28
Scripts/Layout/VerticalScrollSnap.cs
View File

@ -13,19 +13,23 @@ namespace UnityEngine.UI.Extensions
{
void Start()
{
isVertical = true;
childAnchorPoint = new Vector2(0.5f,0);
DistributePages();
if(MaskArea) CalculateVisible();
_lerp = false;
_isVertical = true;
_childAnchorPoint = new Vector2(0.5f,0);
_currentPage = StartingScreen;
SetScrollContainerPosition();
UpdateLayout();
}
void Update()
{
if (!_lerp && _scroll_rect.velocity == Vector2.zero)
{
if (!_settled && !_pointerDown)
{
if (!IsRectSettledOnaPage(_screensContainer.localPosition))
{
ScrollToClosestElement();
}
}
return;
}
else if (_lerp)
@ -70,7 +74,7 @@ namespace UnityEngine.UI.Extensions
currentYPosition = _offset + i * pageStepValue;
child.sizeDelta = new Vector2(panelDimensions.width, panelDimensions.height);
child.anchoredPosition = new Vector2(0f, currentYPosition);
child.anchorMin = child.anchorMax = child.pivot = childAnchorPoint;
child.anchorMin = child.anchorMax = child.pivot = _childAnchorPoint;
}
_dimension = currentYPosition + _offset * -1;
@ -136,8 +140,18 @@ namespace UnityEngine.UI.Extensions
{
_lerp = false;
DistributePages();
if (MaskArea) UpdateVisible();
SetScrollContainerPosition();
}
private void OnRectTransformDimensionsChange()
{
if (_childAnchorPoint != Vector2.zero)
{
UpdateLayout();
}
}
#region Interfaces
/// <summary>
/// Release screen to swipe