public void UpdateScroll()
{
int cursorPixelPos = ControlRenderer.GetCharPosTextField(
this.rect,
this.text,
ControlRenderer.DefaultFont,
TextBoxStyle.Sunken,
this.cursorIndex,
this.scroll);
if (cursorPixelPos - this.rect.X < 15 && this.scroll > 0)
{
this.scroll = Math.Max(this.scroll - (15 - cursorPixelPos + this.rect.X), 0);
this.EmitInvalidate();
}
else if (cursorPixelPos - this.rect.X > this.rect.Width - 15)
{
this.scroll += (cursorPixelPos - this.rect.X) - (this.rect.Width - 15);
this.EmitInvalidate();
}
}
