private void OnOffsetChangeRequested(IScrollController sender, ScrollControllerOffsetChangeRequestedEventArgs e)
{
if (sender == horizontalScrollController)
{
LogMessage("CanvasScrollControllerConsumer: OnOffsetChangeRequested for HorizontalScrollController");
LogMessage("Offset=" + e.Offset + ", OffsetKind=" + e.OffsetKind + ", OffsetChangeKind=" + e.OffsetChangeKind);
switch (e.OffsetKind)
{
case ScrollerViewKind.Absolute:
{
switch (e.OffsetChangeKind)
{
case ScrollerViewChangeKind.DisableAnimation:
Canvas.SetLeft(scrolledElement, -e.Offset);
break;
}
break;
}
}
}
else if (sender == verticalScrollController)
{
LogMessage("CanvasScrollControllerConsumer: OnOffsetChangeRequested for VerticalScrollController");
LogMessage("Offset=" + e.Offset + ", OffsetKind=" + e.OffsetKind + ", OffsetChangeKind=" + e.OffsetChangeKind);
switch (e.OffsetKind)
{
case ScrollerViewKind.Absolute:
{
switch (e.OffsetChangeKind)
{
case ScrollerViewChangeKind.DisableAnimation:
Canvas.SetTop(scrolledElement, -e.Offset);
break;
}
break;
}
}
}
else
{
LogMessage("CanvasScrollControllerConsumer: OnOffsetChangeRequested for unknown sender");
}
}
private int RaiseOffsetChangeRequested(
double offset,
ScrollerViewKind offsetKind,
ScrollerViewChangeKind offsetChangeKind)
{
LogMessage("ScrollBarController: RaiseOffsetChangeRequested for Orientation=" + Orientation + " with offset =" + offset + ", offsetKind=" + offsetKind + ", offsetChangeKind=" + offsetChangeKind);
if (OffsetChangeRequested != null)
{
ScrollControllerOffsetChangeRequestedEventArgs e =
new ScrollControllerOffsetChangeRequestedEventArgs(
offset,
offsetKind,
offsetChangeKind);
OffsetChangeRequested(this, e);
if (e.ViewChangeId != -1 && !lstOffsetChangeIds.Contains(e.ViewChangeId))
{
operationsCount++;
lstOffsetChangeIds.Add(e.ViewChangeId);
}
return(e.ViewChangeId);
}
return(-1);
}
private void IScrollController_OffsetChangeRequested(IScrollController sender, ScrollControllerOffsetChangeRequestedEventArgs args)
{
try
{
if (provideViewChangeIds)
{
viewChangeId++;
args.ViewChangeId = viewChangeId;
AppendAsyncEventMessage("OffsetChangeRequested Created ViewChangeId=" + args.ViewChangeId);
lock (asyncEventReportingLock)
{
viewChangeIds.Add(args.ViewChangeId);
}
var ignored = this.Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, ProcessAsyncOperation);
}
else
{
AppendAsyncEventMessage("OffsetChangeRequested");
}
}
catch (Exception ex)
{
txtExceptionReport.Text = ex.ToString();
lstScrollBar2Events.Items.Add(ex.ToString());
}
}
