/// <summary>
/// 响应垂直滚动条滚动事件
/// Occurs when the Table's vertical scrollbar is scrolled
/// </summary>
/// <param name="sender">The object that Raised the event</param>
/// <param name="e">A ScrollEventArgs that contains the event data</param>
protected void OnVerticalScroll(object sender, ScrollEventArgs e)
{
int scrollVal = e.OldValue - e.NewValue;
if (scrollVal != 0)
{
Rectangle invalidateRect = new Rectangle(0, 0, this.Width - VScrollWidth, this.Height - HScrollHeight);
I3RECT scrollRect = I3RECT.FromRectangle(invalidateRect);
scrollRect.top += 1;
I3NativeMethods.ScrollWindow(this.Handle, 0, scrollVal, ref scrollRect, ref scrollRect);
if (scrollVal < 0)
{
invalidateRect.Y = invalidateRect.Bottom + scrollVal;
}
invalidateRect.Height = Math.Abs(scrollVal) + 1;
this.Invalidate(invalidateRect, false);
}
}
protected void OnHorizontalScroll(object sender, ScrollEventArgs e)
{
int scrollVal = e.OldValue - e.NewValue;
if (scrollVal != 0)
{
Rectangle invalidateRect = new Rectangle(0, 0, this.Width - VScrollWidth, this.Height - HScrollHeight);
I3RECT scrollRect = I3RECT.FromRectangle(invalidateRect);
//移动窗体的绘画区
I3NativeMethods.ScrollWindow(this.Handle, scrollVal, 0, ref scrollRect, ref scrollRect);
//计算重绘区域
if (scrollVal < 0)
{
invalidateRect.X = invalidateRect.Right + scrollVal;
}
invalidateRect.Width = Math.Abs(scrollVal) + 1;
this.Invalidate(invalidateRect, false);
}
}