protected virtual void SelectCurrentItem()
{
if (_listBox.SelectedIndex == -1)
{
return;
}
SelectedItem = ((ItemWrapper)_listBox.SelectedItem).Item;
Text = ItemDisplayStringAdaptor.GetDisplayLabel(SelectedItem); // SelectedItem.ToString();
if (Text.Length > 0)
{
SelectionStart = Text.Length;
}
}
protected virtual void UpdateList()
{
int selectedIndex = _listBox.SelectedIndex;
_listBox.BeginUpdate();
_listBox.Items.Clear();
_listBox.Font = Font;
_listBox.ItemHeight = _listBox.Font.Height;
int maxWidth = Width;
using (Graphics g = (_autoSizePopup) ? CreateGraphics() : null)
{
// Text.Trim() allows "1 " to trigger updating the list and matching "1 Universe", where
// the match involves "1" and "Universe" separately. (Note that "1 " does not match either
// "1" or "Universe".)
foreach (object item in ItemFilterer.Invoke(Text.Trim(), Items, ItemDisplayStringAdaptor))
{
string label = ItemDisplayStringAdaptor.GetDisplayLabel(item);
_listBox.Items.Add(new ItemWrapper(item, label));
if (_autoSizePopup)
{
maxWidth = Math.Max(maxWidth, MeasureItem(g, label).Width);
}
}
}
_listBox.EndUpdate();
_listBox.SelectedIndex = selectedIndex;
if (_listBox.Items.Count == 0)
{
HideList();
}
else
{
int visItems = _listBox.Items.Count;
if (visItems > 8)
{
visItems = 8;
}
_listBox.Height = (visItems * _listBox.ItemHeight) + 4;
switch (BorderStyle)
{
case BorderStyle.FixedSingle:
{
_listBox.Height += 2;
break;
}
case BorderStyle.Fixed3D:
{
_listBox.Height += 4;
break;
}
}
if (_autoSizePopup)
{
bool hasScrollBar = visItems < _listBox.Items.Count;
_listBox.Width = maxWidth + (hasScrollBar ? 10 : 0);
// in theory this shouldn't be needed
}
_listBox.RightToLeft = RightToLeft;
}
}