public override void ReloadSections(NSIndexSet sections)
{
NativeLayout?.NotifyCollectionChange(new CollectionChangedOperation(
IndexPath.FromRowSection(0, (int)sections.FirstIndex),
(int)sections.Count,
NotifyCollectionChangedAction.Replace,
CollectionChangedOperation.Element.Group
));
base.ReloadSections(sections);
}
public void ScrollIntoView(int displayPosition, ScrollIntoViewAlignment alignment)
{
StopScroll();
if (NativeLayout != null)
{
NativeLayout.ScrollToPosition(displayPosition, alignment);
AwakenScrollBars();
}
}
public void Refresh()
{
CurrentAdapter?.Refresh();
var isScrollResetting = NativeLayout != null && NativeLayout.ContentOffset != 0;
NativeLayout?.Refresh();
if (isScrollResetting)
{
// Raise scroll events since offset has been reset to 0
InvokeOnScroll();
}
}
public override void ReloadItems(NSIndexPath[] indexPaths)
{
if (TryApplyCollectionChange())
{
NativeLayout?.NotifyCollectionChange(new CollectionChangedOperation(
indexPaths.First().ToIndexPath(),
indexPaths.Length,
NotifyCollectionChangedAction.Replace,
CollectionChangedOperation.Element.Item
));
base.ReloadItems(indexPaths);
}
}
public override void ReloadSections(NSIndexSet sections)
{
if (TryApplyCollectionChange())
{
using (EnableOrDisableAnimations())
{
NativeLayout?.NotifyCollectionChange(new CollectionChangedOperation(
Uno.UI.IndexPath.FromRowSection(0, (int)sections.FirstIndex),
(int)sections.Count,
NotifyCollectionChangedAction.Replace,
CollectionChangedOperation.Element.Group
));
base.ReloadSections(sections);
}
}
}
public override void DeleteSections(NSIndexSet sections)
{
if (TryApplyCollectionChange())
{
NativeLayout?.NotifyCollectionChange(new CollectionChangedOperation(
IndexPath.FromRowSection(0, (int)sections.FirstIndex),
(int)sections.Count,
NotifyCollectionChangedAction.Remove,
CollectionChangedOperation.Element.Group
));
try
{
base.DeleteSections(sections);
}
catch (MonoTouchException e)
{
this.Log().Error("Error when updating collection", e);
}
}
}
public override void DeleteItems(NSIndexPath[] indexPaths)
{
if (TryApplyCollectionChange())
{
NativeLayout?.NotifyCollectionChange(new CollectionChangedOperation(
indexPaths.First().ToIndexPath(),
indexPaths.Length,
NotifyCollectionChangedAction.Remove,
CollectionChangedOperation.Element.Item
));
try
{
base.DeleteItems(indexPaths);
}
catch (MonoTouchException e)
{
this.Log().Error("Error when updating collection", e);
}
}
}
public override void InsertItems(NSIndexPath[] indexPaths)
{
if (TryApplyCollectionChange())
{
using (EnableOrDisableAnimations())
{
NativeLayout?.NotifyCollectionChange(new CollectionChangedOperation(
indexPaths.First().ToIndexPath(),
indexPaths.Length,
NotifyCollectionChangedAction.Add,
CollectionChangedOperation.Element.Item
));
try
{
base.InsertItems(indexPaths);
}
catch (MonoTouchException e)
{
this.Log().Error("Error when updating collection", e);
}
}
}
}
public override void InsertSections(NSIndexSet sections)
{
if (TryApplyCollectionChange())
{
using (EnableOrDisableAnimations())
{
NativeLayout?.NotifyCollectionChange(new CollectionChangedOperation(
Uno.UI.IndexPath.FromRowSection(0, (int)sections.FirstIndex),
(int)sections.Count,
NotifyCollectionChangedAction.Add,
CollectionChangedOperation.Element.Group
));
try
{
base.InsertSections(sections);
}
catch (MonoTouchException e)
{
this.Log().Error("Error when updating collection", e);
}
}
}
}
public override bool CanScrollVertically(int direction)
{
return(NativeLayout.CanCurrentlyScrollVertically(direction));
}
public override CGSize SizeThatFits(CGSize size)
{
var result = NativeLayout.SizeThatFits(size);
return(result);
}
// We override these two methods because the base implementation depends on ComputeScrollOfset, which is not reliable when, eg, items
// are inserted/removed out of view.
public override bool CanScrollHorizontally(int direction)
{
return NativeLayout.CanCurrentlyScrollHorizontally(direction);
}
