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Commands to know the direction of the scroll #79

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Commands to know the direction of the scroll #79

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20 changes: 17 additions & 3 deletions ...o.CollectionView.Droid/Renderers/CollectionViewRenderer.OnControlScrollChangedListener.cs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -19,8 +19,6 @@ private class OnControlScrollChangedListener : RecyclerView.OnScrollListener
private CancellationTokenSource _cts;
private int _lastVisibleItemIndex = -1;

private int _currentOffset = 0;

public OnControlScrollChangedListener(IntPtr handle, JniHandleOwnership transfer)
: base(handle, transfer)
{
Expand All @@ -38,7 +36,23 @@ public override void OnScrolled(RecyclerView recyclerView, int dx, int dy)
{
base.OnScrolled(recyclerView, dx, dy);

_currentOffset += dx;
if (dx > 0)
{
_element.ScrollingRightCommand?.Execute(null);
}
else if (dx < 0)
{
_element.ScrollingLeftCommand?.Execute(null);
}

if (dy > 0)
{
_element.ScrollingDownCommand?.Execute(null);
}
else if (dy < 0)
{
_element.ScrollingUpCommand?.Execute(null);
}

var infiniteListLoader = _element?.InfiniteListLoader;
if (infiniteListLoader == null)
Expand Down
44 changes: 44 additions & 0 deletions Sharpnado.CollectionView/RenderedViews/CollectionView.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -159,6 +159,26 @@ public class CollectionView : View
typeof(ICommand),
typeof(CollectionView));

public static readonly BindableProperty ScrollingLeftCommandProperty = BindableProperty.Create(
nameof(ScrollingLeftCommand),
typeof(ICommand),
typeof(CollectionView));

public static readonly BindableProperty ScrollingUpCommandProperty = BindableProperty.Create(
nameof(ScrollingUpCommand),
typeof(ICommand),
typeof(CollectionView));

public static readonly BindableProperty ScrollingRightCommandProperty = BindableProperty.Create(
nameof(ScrollingRightCommand),
typeof(ICommand),
typeof(CollectionView));

public static readonly BindableProperty ScrollingDownCommandProperty = BindableProperty.Create(
nameof(ScrollingDownCommand),
typeof(ICommand),
typeof(CollectionView));

public static readonly BindableProperty EnableDragAndDropProperty = BindableProperty.Create(
nameof(EnableDragAndDrop),
typeof(bool),
Expand Down Expand Up @@ -317,6 +337,30 @@ public ICommand ScrollEndedCommand
set => SetValue(ScrollEndedCommandProperty, value);
}

public ICommand ScrollingLeftCommand
{
get => (ICommand)GetValue(ScrollingLeftCommandProperty);
set => SetValue(ScrollingLeftCommandProperty, value);
}

public ICommand ScrollingUpCommand
{
get => (ICommand)GetValue(ScrollingUpCommandProperty);
set => SetValue(ScrollingUpCommandProperty, value);
}

public ICommand ScrollingDownCommand
{
get => (ICommand)GetValue(ScrollingDownCommandProperty);
set => SetValue(ScrollingDownCommandProperty, value);
}

public ICommand ScrollingRightCommand
{
get => (ICommand)GetValue(ScrollingRightCommandProperty);
set => SetValue(ScrollingRightCommandProperty, value);
}

public bool EnableDragAndDrop
{
get => (bool)GetValue(EnableDragAndDropProperty);
Expand Down