public override bool TryCreateSelection(int index, bool ensure, out Selection <TItem> selection)
{
var source = GetSource(index);
if (TryGetItem(source, ensure, out var item) == false)
{
TryGetItem(index, ensure, out item);
}
var value = SelectorCore.GetValue(item, source);
selection = new Selection <TItem>(index, item, source, value);
return(selection.IsEmpty == false);
}
public override bool TryCreateSelection(object source, bool ensure, out Selection <TItem> selection)
{
var index = GetIndexOfSource(source);
if (TryGetItem(source, ensure, out var item) == false && index != -1)
{
TryGetItem(index, ensure, out item);
}
var value = SelectorCore.GetValue(item, source);
selection = new Selection <TItem>(index, item, source, value);
return(true);
}
public virtual int GetIndexOfValue(object value)
{
var count = Count;
for (var i = 0; i < count; i++)
{
TryGetItem(i, false, out var item);
var source = GetSource(i);
var itemValue = SelectorCore.GetValue(item, source);
if (CompareValues(itemValue, value))
{
return(i);
}
}
return(-1);
}
