public void PageScroll(bool isUp)
{
IntPtr direction = (IntPtr)Ul.SB_PAGEDOWN;
if (isUp)
{
direction = (IntPtr)Ul.SB_PAGEUP;
}
Ul.SendMessage2(this.Handle, Ul.WM_VSCROLL, direction, IntPtr.Zero);
}
public void ScrollSelectedToCenter()
{
Rectangle rect = this.GetItemRectangle(this.SelectedIndex);
int selectedOrder = (int)((rect.Y + rect.Height) / rect.Height) - 1;
int visibleItemsCount = GetVisibleCount();
int scrollCount = 0;
// определим направление
IntPtr direction = (IntPtr)Ul.SB_LINEUP;
if (selectedOrder < visibleItemsCount / 2)
{
scrollCount = visibleItemsCount / 2 - selectedOrder;
}
else
{
direction = (IntPtr)Ul.SB_LINEDOWN;
scrollCount = selectedOrder - visibleItemsCount / 2;
}
for (int i = 0; i < scrollCount; ++i)
{
Ul.SendMessage2(this.Handle, Ul.WM_VSCROLL, direction, IntPtr.Zero);
// Console.WriteLine(selectedOrder.ToString() + " -> " + scrollCount.ToString());
}
}
