/// <summary>
/// vertical table scroll
/// </summary>
/// <param name="scrollEventType">Scroll Event Type</param>
/// <param name="newPos">the new position</param>
/// <param name="oldPos">the old position</param>
/// <param name="scrollWindow">true, if we need to scroll the window right away</param>
protected override void ScrollVertically(ScrollEventType scrollEventType, int newPos, int oldPos, bool scrollWindow)
{
NativeScroll.SCROLLINFO sc = ScrollInfo(NativeScroll.SB_VERT);
int maxScroll = sc.nMax - sc.nPage + 1;
if (newPos > maxScroll)
{
newPos = maxScroll;
}
if (newPos < 0)
{
newPos = 0;
}
NativeScroll.SetScrollPos(this.Handle, NativeScroll.SB_VERT, newPos, true);
_topIndex = newPos - RecordsBeforeCurrentView;
if (scrollWindow)
{
NativeWindowCommon.RECT rc = new NativeWindowCommon.RECT();
rc.top = ClientRectangle.Top + _header.Height;
rc.left = ClientRectangle.Left;
rc.right = ClientRectangle.Right;
rc.bottom = ClientRectangle.Bottom;
NativeScroll.ScrollWindowEx(this.Handle, 0, (oldPos - newPos) * RowHeight, ref rc, (IntPtr)null, (IntPtr)null, (IntPtr)null, 0);
}
base.ScrollVertically(scrollEventType, newPos, oldPos, scrollWindow);
}
/// <summary>
/// perform horizontal scroll
/// </summary>
/// <param name="value"></param>
/// <param name="newValue"></param>
private void ScrollHorizontally(int value, int newValue)
{
NativeScroll.SCROLLINFO sc = ScrollInfo(NativeScroll.SB_HORZ);
int maxValue = sc.nMax - sc.nPage;
if (newValue < 0)
{
newValue = 0;
}
if (newValue > maxValue)
{
newValue = maxValue;
}
NativeScroll.SetScrollPos(this.Handle, NativeScroll.SB_HORZ, newValue, true);
NativeWindowCommon.RECT rc = new NativeWindowCommon.RECT();
NativeScroll.ScrollWindowEx(this.Handle, value - newValue, 0, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero,
ref rc, NativeScroll.SW_SCROLLCHILDREN | NativeScroll.SW_INVALIDATE | NativeScroll.SW_ERASE);
_corner.X = getXCorner();
}
