protected virtual ListViewDataItem GetUpperItem(ListViewDataItem currentItem)
{
ListViewTraverser enumerator = this.Scroller.Traverser.GetEnumerator() as ListViewTraverser;
enumerator.Position = (object)currentItem;
int num1 = 0;
while (enumerator.MovePrevious() && enumerator.Current != null && !enumerator.Current.IsLastInRow)
{
num1 += this.GetItemFlowOffset(enumerator.Current);
}
if (!(currentItem is ListViewDataItemGroup) && currentItem != null)
{
num1 += this.GetItemFlowOffset(currentItem) / 2;
}
if (enumerator.Position == null)
{
return((ListViewDataItem)null);
}
do
{
;
}while (enumerator.MovePrevious() && enumerator.Current != null && !enumerator.Current.IsLastInRow);
int num2 = 0;
while (enumerator.MoveNext() && !enumerator.Current.IsLastInRow && num2 + this.GetItemFlowOffset(enumerator.Current) < num1)
{
num2 += this.GetItemFlowOffset(enumerator.Current);
}
return(enumerator.Current);
}
public bool Remove(ListViewDataItem item)
{
ListViewTraverser traverser = this.owner.ViewElement.Scroller.Traverser.GetEnumerator() as ListViewTraverser;
traverser.Position = item;
if (traverser.MovePrevious() && traverser.Current != null && traverser.Current != item)
{
this.owner.SelectedItem = traverser.Current;
}
else
{
traverser.Position = item;
if (traverser.MoveNext() && traverser.Current != item)
{
this.owner.SelectedItem = traverser.Current;
}
else
{
this.owner.SelectedItem = null;
}
}
bool result = this.owner.ListSource.Remove(item);
item.Owner = null;
this.owner.SelectedItems.ProcessSelectedItem(item);
return(result);
}
protected virtual ListViewDataItem GetUpperItem(ListViewDataItem currentItem)
{
ListViewTraverser enumerator = this.Scroller.Traverser.GetEnumerator() as ListViewTraverser;
enumerator.Position = currentItem;
int currentItemX = 0;
while (enumerator.MovePrevious() &&
enumerator.Current != null && !enumerator.Current.IsLastInRow)
{
currentItemX += enumerator.Current.ActualSize.Width;
}
if (!(currentItem is ListViewDataItemGroup) && currentItem != null)
{
currentItemX += currentItem.ActualSize.Width / 2;
}
if (enumerator.Position == null)
{
return(null);
}
while (enumerator.MovePrevious() &&
enumerator.Current != null && !enumerator.Current.IsLastInRow)
{
}
int x = 0;
while (enumerator.MoveNext() && !enumerator.Current.IsLastInRow)
{
if (x + enumerator.Current.ActualSize.Width >= currentItemX)
{
return(enumerator.Current);
}
x += enumerator.Current.ActualSize.Width;
}
return(enumerator.Current);
}
/// <summary>
/// Gets the previous visible item of a given <see cref="ListViewDataItem"/>.
/// </summary>
/// <param name="currentItem">The current item.</param>
/// <returns>The previous item.</returns>
protected virtual ListViewDataItem GetPreviousItem(ListViewDataItem currentItem)
{
ListViewTraverser enumerator = this.Scroller.Traverser.GetEnumerator() as ListViewTraverser;
enumerator.Position = currentItem;
if (enumerator.MovePrevious())
{
return(enumerator.Current);
}
else
{
return(null);
}
}
public bool Remove(ListViewDataItem item)
{
ListViewTraverser enumerator = this.owner.ViewElement.Scroller.Traverser.GetEnumerator() as ListViewTraverser;
enumerator.Position = (object)item;
if (enumerator.MovePrevious() && enumerator.Current != null && enumerator.Current != item)
{
this.owner.SelectedItem = enumerator.Current;
}
else
{
enumerator.Position = (object)item;
this.owner.SelectedItem = !enumerator.MoveNext() || enumerator.Current == item ? (ListViewDataItem)null : enumerator.Current;
}
bool flag = this.owner.ListSource.Remove(item);
item.Owner = (RadListViewElement)null;
this.owner.SelectedItems.ProcessSelectedItem(item);
this.owner.CheckedItems.ProcessCheckedItem(item);
return(flag);
}
