/// <summary>
/// Calculate the extent of the view based on the available size
/// </summary>
/// <param name="availableSize">available size</param>
/// <param name="itemCount">number of data items</param>
/// <returns></returns>
private System.Windows.Size CalculateExtent(System.Windows.Size availableSize, int itemCount)
{
if (PageRowBounds == null || PageRowBounds.Length == 0)
{
return(new Size(availableSize.Width, _extent.Height));
}
// we get the pdf page with the greatest width, so we know how broad the extent must be
var maxWidth = PageRowBounds.Select(f => f.Width).Max();
// we get the sum of all pdf page heights, so we know how high the extent must be
var totalHeight = PageRowBounds.Sum(f => f.Height);
return(new Size(maxWidth, totalHeight));
}
public double GetVerticalOffsetByItemIndex(int itemIndex)
{
// sum the heights of all previous pages: this is where the current y offset should be
return(PageRowBounds.Take(itemIndex).Sum(f => f.Height));
}
