void viewport_HScrollRequest(object sender, ScrollSurfaceRequestEventArgs e)
{
if (HScrollRequest != null)
{
HScrollRequest.Invoke(sender, e);
}
}
protected void RaiseScrollChangedEvents(bool needVeritcal, bool needHorizontal)
{
if (this.HasVScrollChanged)
{
VScrollRequest.Invoke(this, new ScrollSurfaceRequestEventArgs(needVeritcal));
}
if (this.HasHScrollChanged)
{
HScrollRequest.Invoke(this, new ScrollSurfaceRequestEventArgs(needHorizontal));
}
}