public void Move(int oldIndex, int newIndex)
{
if (HasItems && MathEx.IsWithin(oldIndex, 0, Count - 1))
{
T item = list[oldIndex];
list.RemoveAt(oldIndex);
list.Insert(newIndex, item);
RaiseCollectionChanged(
new NotifyCollectionChangedEventArgs(
NotifyCollectionChangedAction.Move,
item, newIndex, oldIndex));
OnItmesCountChanged();
}
}
public void RemoveAt(int index)
{
int oldCount = list.Count;
if (HasItems && MathEx.IsWithin(index, 0, oldCount - 1))
{
T item = list[index];
list.RemoveAt(index);
if (oldCount != Count)
{
RaiseCollectionChanged(
new NotifyCollectionChangedEventArgs(
NotifyCollectionChangedAction.Remove, item, index));
OnItmesCountChanged();
}
}
}
public static bool CanItemIndexIncrement <T>(this NotifiableCollection <T> collection, int currentIndex, int downCount = 1)
{
return(MathEx.IsWithin(currentIndex, 0, collection.Count - (1 + downCount)));
}
public static bool CanItemIndexDecrement <T>(this NotifiableCollection <T> collection, int currentIndex, int count)
{
return(MathEx.IsWithin(currentIndex, count, collection.Count - 1));
}
public bool CanItemIndexIncrement(int currentIndex, int downCount = 1)
{
return(MathEx.IsWithin(currentIndex, 0, Count - (1 + downCount)));
}
public bool CanItemIndexDecrement(int currentIndex, int count)
{
return(MathEx.IsWithin(currentIndex, count, Count - 1));
}