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Force to update CurrentIndex before scroll ended (during scroll) #80

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Force to update CurrentIndex before scroll ended (during scroll) #80

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Force to update CurrentIndex before scroll ended (during scroll)
ems107 Oct 8, 2022
252e097
pr changes
ems107 Oct 10, 2022
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7 changes: 7 additions & 0 deletions ...o.CollectionView.Droid/Renderers/CollectionViewRenderer.OnControlScrollChangedListener.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -40,6 +40,13 @@ public override void OnScrolled(RecyclerView recyclerView, int dx, int dy)

_currentOffset += dx;

if (_element.ForceUpdateCurrentIndexDuringScroll && _weakNativeView.TryGetTarget(out CollectionViewRenderer nativeView))
{
_cts?.Cancel();
_cts = new CancellationTokenSource();
UpdateCurrentIndex(nativeView, _cts.Token);
}

var infiniteListLoader = _element?.InfiniteListLoader;
if (infiniteListLoader == null)
{
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12 changes: 12 additions & 0 deletions Sharpnado.CollectionView/RenderedViews/CollectionView.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -217,6 +217,12 @@ public class CollectionView : View
typeof(CollectionView),
1);

public static readonly BindableProperty ForceUpdateCurrentIndexDuringScrollProperty = BindableProperty.Create(
nameof(ForceUpdateCurrentIndexDuringScroll),
typeof(bool),
typeof(CollectionView),
false);

public CollectionView()
{
// default layout is VerticalList
Expand Down Expand Up @@ -365,6 +371,12 @@ public int ColumnCount
set => SetValue(ColumnCountProperty, value);
}

public bool ForceUpdateCurrentIndexDuringScroll
{
get => (bool)GetValue(ForceUpdateCurrentIndexDuringScrollProperty);
set => SetValue(ForceUpdateCurrentIndexDuringScrollProperty, value);
}

public Func<ViewCell, Task> PreRevealAnimationAsync { get; set; }

public Func<ViewCell, Task> RevealAnimationAsync { get; set; }
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