private void SelectItem(StringHost item)
{
if (item == null)
{
// clearn current selection
if (_SelectedItem != null)
{
_SelectedItem.IsSelected = false;
}
}
else if (item != null && item._IsSelectable)
{
// clearn current selection
if (_SelectedItem != null)
{
_SelectedItem.IsSelected = false;
}
// select the new item
_SelectedItem = item;
item.IsSelected = true;
// udpate the index
_SelectedIndexInView = StringHostItems.IndexOf(item);
}
}
private void ItemMouseLeave(object sender, MouseEventArgs e)
{
if (this.IsMouseCaptured)
{
FrameworkElement element = (sender as FrameworkElement);
if (element != null)
{
StringHost item = (element.DataContext as StringHost);
int index = StringHostItems.IndexOf(item);
if (index == 9)
{
Point p = e.GetPosition(element);
if (p.Y > 0)
{
if (_SelectNextTimer == null)
{
_SelectNextTimer = new DispatcherTimer();
_SelectNextTimer.Tick += new EventHandler(_SelectNextTimer_Tick);
_SelectNextTimer.Interval = TimeSpan.FromMilliseconds(100);
}
_SelectNextTimer.Start();
}
}
if (index == 0)
{
Point p = e.GetPosition(element);
if (p.Y < 0)
{
if (_SelectPreviousTimer == null)
{
_SelectPreviousTimer = new DispatcherTimer();
_SelectPreviousTimer.Tick += new EventHandler(_SelectPreviousTimer_Tick);
_SelectPreviousTimer.Interval = TimeSpan.FromMilliseconds(100);
}
_SelectPreviousTimer.Start();
}
}
}
}
}
