//Monitor and handle the scroll viewer
private async void ScrollViewer_ViewChanged(object sender, ScrollViewerViewChangedEventArgs e)
{
try
{
//Get current scroll item
int CurrentOffSetId = EventsScrollViewer.GetCurrentOffsetIndex(ListView_Items);
if (CurrentOffSetId < 0)
{
return;
}
//Update the current item count
AppVariables.CurrentShownItemCount = CurrentOffSetId + 1;
if (stackpanel_Header.Visibility == Visibility.Visible || AppVariables.CurrentTotalItemsCount == 0)
{
textblock_StatusCurrentItem.Text = AppVariables.CurrentShownItemCount.ToString();
}
else
{
textblock_StatusCurrentItem.Text = AppVariables.CurrentShownItemCount + "/" + AppVariables.CurrentTotalItemsCount;
}
//Update the shown item content
await EventsScrollViewer.ScrollViewerUpdateContent(ListView_Items, CurrentOffSetId);
}
catch { }
}
//Monitor and handle the scroll viewer
private async void ScrollViewer_ViewChanged(object sender, ScrollViewerViewChangedEventArgs e)
{
try
{
//Get current scroll item
VirtualizingStackPanel virtualizingStackPanel = AVFunctions.FindVisualChild <VirtualizingStackPanel>(ListView_Items);
Int32 CurrentOffSetId = (virtualizingStackPanel.Orientation == Orientation.Horizontal) ? (Int32)virtualizingStackPanel.HorizontalOffset : (Int32)virtualizingStackPanel.VerticalOffset;
//Update the current item count
textblock_StatusCurrentItem.Tag = (CurrentOffSetId + 1).ToString();
Int32 HeaderTargetSize = Convert.ToInt32(stackpanel_Header.Tag);
Int32 HeaderCurrentSize = Convert.ToInt32(stackpanel_Header.Height);
if (HeaderCurrentSize == HeaderTargetSize || AppVariables.CurrentTotalItemsCount == 0)
{
textblock_StatusCurrentItem.Text = textblock_StatusCurrentItem.Tag.ToString();
}
else
{
textblock_StatusCurrentItem.Text = textblock_StatusCurrentItem.Tag.ToString() + "/" + AppVariables.CurrentTotalItemsCount;
}
//Update the shown item content
await EventsScrollViewer.ScrollViewerUpdateContent(ListView_Items, CurrentOffSetId);
//Check if new items need to be loaded
await EventsScrollViewer.ScrollViewerAddItems(ListView_Items, CurrentOffSetId);
}
catch { }
}
