/// <summary>
/// Gets the order of the layers in which they will be displayed in the layer view panel,
/// including nesting.
/// </summary>
private static void GetOCGOrder(PdfArray order, PdfLayer layer)
{
if (!layer.IsOnPanel())
{
return;
}
if (layer.GetTitle() == null)
{
order.Add(layer.GetPdfObject().GetIndirectReference());
}
IList <PdfLayer> children = layer.GetChildren();
if (children == null)
{
return;
}
PdfArray kids = new PdfArray();
if (layer.GetTitle() != null)
{
kids.Add(new PdfString(layer.GetTitle(), PdfEncodings.UNICODE_BIG));
}
foreach (PdfLayer child in children)
{
GetOCGOrder(kids, child);
}
if (kids.Size() > 0)
{
order.Add(kids);
}
}
/// <summary>Adds a new layer to the current layer membership.</summary>
/// <param name="layer">the layer to be added</param>
public virtual void AddLayer(PdfLayer layer)
{
PdfArray layers = GetPdfObject().GetAsArray(PdfName.OCGs);
if (layers == null)
{
layers = new PdfArray();
GetPdfObject().Put(PdfName.OCGs, layers);
}
layers.Add(layer.GetPdfObject());
layers.SetModified();
}
/// <summary>Adds a new operand to the current visibility expression.</summary>
/// <param name="layer">the layer operand to be added.</param>
public virtual void AddOperand(PdfLayer layer)
{
GetPdfObject().Add(layer.GetPdfObject());
GetPdfObject().SetModified();
}