private void qScrollBar_ScrollSkip(bool Up)
{
int fvi = Math.Max(1, FirstVisibleItem);
if (Up)
{
fvi--;
}
if ((Up || Values.Count > fvi) && (!Up || fvi > 0))
{
char c = Lib.FirstCharNoTheUpper(Values[fvi]);
char c2 = c;
Func <string, char> getChar = GetFilterChar();
if (c != ' ')
{
if (Up)
{
do
{
fvi--;
c = c2;
}while (fvi > 1 && c == (c2 = getChar(Values[fvi - 1])));
FirstVisibleItem = Math.Min(fvi, FirstVisibleItem - 1);
}
else
{
char min = 'A';
int max = Values.Count - NumVisibleItems + 1;
do
{
fvi++;
c = c2;
}while (fvi < max && ((c == (c2 = getChar(Values[fvi + 1]))) || (c2 < min)));
FirstVisibleItem = Math.Max(fvi + 1, FirstVisibleItem - 1);
}
}
if (FirstVisibleItem > 0)
{
controller.ShowLetter(getChar(Values[FirstVisibleItem]));
}
}
}