public virtual bool UpdateSelectedBindValue(UICollectionViewCell cell, bool selected)
{
var collectionView = CollectionView;
if (collectionView == null || collectionView.AllowsMultipleSelection)
{
return(selected);
}
if (!collectionView.AllowsSelection)
{
return(false);
}
if (HasMask(cell, InitializingStateMask))
{
if (Equals(cell.DataContext(), SelectedItem))
{
return(true);
}
return(selected && SelectedItem == null);
}
return(selected);
}
public virtual void OnCellSelectionChanged(UICollectionViewCell cell, bool selected, bool setFromBinding)
{
var collectionView = CollectionView;
if (!setFromBinding || collectionView == null)
{
return;
}
UpdateSelectedItemInternal(collectionView, cell.DataContext(), selected);
var path = IndexPathForCell(collectionView, cell);
if (path == null)
{
return;
}
if (selected)
{
collectionView.SelectItem(path, false, UICollectionViewScrollPosition.None);
}
else
{
collectionView.DeselectItem(path, false);
}
}
public virtual void OnCellSelectionChanged(UICollectionViewCell cell, bool selected, bool setFromBinding)
{
var collectionView = CollectionView;
if (!setFromBinding || collectionView == null)
return;
UpdateSelectedItemInternal(collectionView, cell.DataContext(), selected);
var path = IndexPathForCell(collectionView, cell);
if (path == null)
return;
if (selected)
collectionView.SelectItem(path, false, UICollectionViewScrollPosition.None);
else
collectionView.DeselectItem(path, false);
}
public virtual bool UpdateSelectedBindValue(UICollectionViewCell cell, bool selected)
{
var collectionView = CollectionView;
if (collectionView == null || collectionView.AllowsMultipleSelection)
return selected;
if (!collectionView.AllowsSelection)
return false;
if (HasMask(cell, InitializingStateMask))
{
if (Equals(cell.DataContext(), SelectedItem))
return true;
return selected && SelectedItem == null;
}
return selected;
}
