private void ScrollLine(ScrollElem sel)
{
sel.Viewer.Dispatcher.Invoke(DispatcherPriority.Normal,
(ParameterizedThreadStart) delegate(object objP)
{
ScrollElem e = objP as ScrollElem;
if (e == null || e.Viewer.VerticalOffset >= e.MaxToScroll)
{
return;
}
e.Viewer.LineDown();
Thread thr = new Thread(new ParameterizedThreadStart(delegate(object obj)
{
ScrollElem s = (ScrollElem)obj;
Thread.Sleep(30);
ScrollLine(s);
}));
thr.Start(e);
}, sel);
}
private bool ScrollNext(FrameworkElement fel)
{
int nMx = 0;
Visibility vis;
if (fel.Dispatcher.CheckAccess())
{
vis = fel.Visibility;
}
else
{
vis = (Visibility)fel.Dispatcher.Invoke(DispatcherPriority.Send,
(Func <FrameworkElement, Visibility>)(f => f.Visibility), fel);
}
if (vis != System.Windows.Visibility.Visible)
{
return(false);
}
PhotoControl pc = fel as PhotoControl;
if (pc != null)
{
if (pc.Dispatcher.CheckAccess())
{
return(pc.ScrollToNext());
}
else
{
return((bool)pc.Dispatcher.Invoke(DispatcherPriority.Send,
(Func <PhotoControl, bool>)(p => p.ScrollToNext()), pc));
}
}
ScrollViewer scv = fel as ScrollViewer;
if (scv == null)
{
return(false);
}
double curScr;
if (scv.Dispatcher.CheckAccess())
{
curScr = scv.VerticalOffset;
}
else
{
curScr = (double)scv.Dispatcher.Invoke(DispatcherPriority.Send,
(Func <ScrollViewer, double>)(lamArg => lamArg.VerticalOffset), scv);
}
var q = scv.Dispatcher.BeginInvoke(DispatcherPriority.Send,
(Func <ScrollViewer, double, bool>) delegate(ScrollViewer sv, double pos)
{
sv.BeginInit();
sv.PageDown();
sv.EndInit();
return(true);
}, scv, new object[] { 0.0 });
nMx = 0;
while (q.Status != DispatcherOperationStatus.Completed && nMx < 1000)
{
nMx++;
Thread.Sleep(2);
}
if (q.Status != DispatcherOperationStatus.Completed)
{
q.Abort();
return(false);
}
double maxToScroll = (double)scv.Dispatcher.Invoke(
DispatcherPriority.Send,
(Func <ScrollViewer, double>)(lamArg => lamArg.VerticalOffset), scv);
if (curScr >= maxToScroll)
{
return(false);
}
q = scv.Dispatcher.BeginInvoke(DispatcherPriority.Send,
(Func <ScrollViewer, double, bool>) delegate(ScrollViewer sv, double pos)
{
sv.ScrollToVerticalOffset(pos);
return(true);
}, scv, new object[] { curScr });
nMx = 0;
while (q.Status != DispatcherOperationStatus.Completed && nMx < 1000)
{
Thread.Sleep(2);
nMx++;
}
if (q.Status != DispatcherOperationStatus.Completed)
{
q.Abort();
return(false);
}
var se = new ScrollElem(scv, maxToScroll);
ScrollLine(se);
return(true);
}