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Updated FastSwipe logic to measure the distance of a swipe against the container width (with threshold offset) rather than using velocity (which was messy) 

Resolves #130
release
Simon Jackson 2017-07-02 14:22:10 +01:00
parent 49ecdc1b0e
commit 439242d914
4 changed files with 21 additions and 36 deletions
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6
Examples/HSS-VSS-ScrollSnap/ScrollSnapManagedTests.unity
View File

@ -311,12 +311,12 @@ MonoBehaviour:
m_Name:
m_EditorClassIdentifier:
StartingScreen: 0
PageStep: 2
PageStep: 2.7
Pagination: {fileID: 266467291}
PrevButton: {fileID: 1112321044}
NextButton: {fileID: 803284189}
transitionSpeed: 7.5
UseFastSwipe: 0
UseFastSwipe: 1
FastSwipeThreshold: 100
SwipeVelocityThreshold: 200
MaskArea: {fileID: 0}
@ -1892,7 +1892,7 @@ RectTransform:
m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
m_AnchorMin: {x: 1, y: 1}
m_AnchorMax: {x: 1, y: 1}
m_AnchoredPosition: {x: -113.9, y: -183.2}
m_AnchoredPosition: {x: -113.899994, y: -183.2}
m_SizeDelta: {x: 150, y: 30}
m_Pivot: {x: 0.5, y: 0.5}
--- !u!114 &803284191

23
Scripts/Layout/HorizontalScrollSnap.cs
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@ -72,7 +72,6 @@ namespace UnityEngine.UI.Extensions
int _offset = 0;
float _dimension = 0;
Rect panelDimensions = gameObject.GetComponent<RectTransform>().rect;
float currentXPosition = 0;
var pageStepValue = _childSize = (int)panelDimensions.width * ((PageStep == 0) ? 3 : PageStep);
@ -88,7 +87,7 @@ namespace UnityEngine.UI.Extensions
_dimension = currentXPosition + _offset * -1;
_screensContainer.GetComponent<RectTransform>().offsetMax = new Vector2(_dimension, 0f);
_screensContainer.offsetMax = new Vector2(_dimension, 0f);
}
/// <summary>
@ -214,25 +213,17 @@ namespace UnityEngine.UI.Extensions
if (_scroll_rect.horizontal)
{
if (UseFastSwipe)
var distance = Vector3.Distance(_startPosition, _screensContainer.localPosition);
if (UseFastSwipe && distance < panelDimensions.width + FastSwipeThreshold)
{
//If using fastswipe - then a swipe does page next / previous
if ((_scroll_rect.velocity.x > 0 &&_scroll_rect.velocity.x > FastSwipeThreshold) ||
_scroll_rect.velocity.x < 0 && _scroll_rect.velocity.x < -FastSwipeThreshold)
_scroll_rect.velocity = Vector3.zero;
if (_startPosition.x - _screensContainer.localPosition.x > 0)
{
_scroll_rect.velocity = Vector3.zero;
if (_startPosition.x - _screensContainer.localPosition.x > 0)
{
NextScreen();
}
else
{
PreviousScreen();
}
NextScreen();
}
else
{
ScrollToClosestElement();
PreviousScreen();
}
}
}

8
Scripts/Layout/ScrollSnapBase.cs
View File

@ -10,6 +10,7 @@ namespace UnityEngine.UI.Extensions
{
public class ScrollSnapBase : MonoBehaviour, IBeginDragHandler, IDragHandler, IScrollSnap
{
internal Rect panelDimensions;
internal RectTransform _screensContainer;
internal bool _isVertical;
@ -29,8 +30,8 @@ namespace UnityEngine.UI.Extensions
internal int _currentPage;
internal int _previousPage;
internal int _halfNoVisibleItems;
internal bool _moveStarted;
private int _bottomItem, _topItem;
private bool _moveStarted;
[Serializable]
public class SelectionChangeStartEvent : UnityEvent { }
@ -63,7 +64,7 @@ namespace UnityEngine.UI.Extensions
[Tooltip("Fast Swipe makes swiping page next / previous (optional)")]
public Boolean UseFastSwipe = false;
[Tooltip("How far swipe has to travel to initiate a page change (optional)")]
[Tooltip("Offset for how far a swipe has to travel to initiate a page change (optional)\nDefault is the panel dimensions")]
public int FastSwipeThreshold = 100;
[Tooltip("Speed at which the ScrollRect will keep scrolling before slowing down and stopping (optional)")]
@ -139,7 +140,8 @@ namespace UnityEngine.UI.Extensions
var vscroll = _scroll_rect.verticalScrollbar.gameObject.AddComponent<ScrollSnapScrollbarHelper>();
vscroll.ss = this;
}
panelDimensions = gameObject.GetComponent<RectTransform>().rect;
if (StartingScreen < 0)
{
StartingScreen = 0;

20
Scripts/Layout/VerticalScrollSnap.cs
View File

@ -214,25 +214,17 @@ namespace UnityEngine.UI.Extensions
if (_scroll_rect.vertical)
{
if (UseFastSwipe)
var distance = Vector3.Distance(_startPosition, _screensContainer.localPosition);
if (UseFastSwipe && distance < panelDimensions.height + FastSwipeThreshold)
{
//If using fastswipe - then a swipe does page next / previous
if ((_scroll_rect.velocity.y > 0 && _scroll_rect.velocity.y > FastSwipeThreshold) ||
_scroll_rect.velocity.y < 0 && _scroll_rect.velocity.y < -FastSwipeThreshold)
_scroll_rect.velocity = Vector3.zero;
if (_startPosition.y - _screensContainer.localPosition.y > 0)
{
_scroll_rect.velocity = Vector3.zero;
if (_startPosition.y - _screensContainer.localPosition.y > 0)
{
NextScreen();
}
else
{
PreviousScreen();
}
NextScreen();
}
else
{
ScrollToClosestElement();
PreviousScreen();
}
}
}