private double ComputeScrollVerticalOffset(Lyric lyrics)
{
ListViewItem item = (ListViewItem)Main_ListView.ContainerFromItem(lyrics);
if (item is null)
{
return(0);
}
var transformToVisual = item.TransformToVisual(Main_ListView);
return(transformToVisual.TransformPoint(new Point()).Y + (item.ActualHeight / 2) - (Root_Viewer.ActualHeight / 2));
}
private double GetItemPosition(ISubtitleLineUi line)
{
ListViewItem container = Main_ListView.ContainerFromItem(line) as ListViewItem;
if (container == null)
{
return(0);
}
var transform = container.TransformToVisual(Main_ListView);
Point position = transform.TransformPoint(new Point());
double result = (position.Y) + (container.ActualHeight / 2D) - (Root_ScrollViewer.ActualHeight / 2D);
return(result > 0 ? result : 0);
}