/// <summary>Creates a title layer without registering it in PdfOCProperties.</summary>
/// <param name="title">the title of the layer</param>
/// <param name="document">the document this title layer belongs to</param>
/// <returns>the created layer</returns>
protected internal static iText.Kernel.Pdf.Layer.PdfLayer CreateTitleSilent(String title, PdfDocument document
) {
if (title == null) {
throw new ArgumentException("Invalid title argument");
}
iText.Kernel.Pdf.Layer.PdfLayer layer = new iText.Kernel.Pdf.Layer.PdfLayer(document);
layer.title = title;
return layer;
}
/// <summary>Adds a child layer.</summary>
/// <remarks>Adds a child layer. Nested layers can only have one parent.</remarks>
/// <param name="childLayer">the child layer</param>
public virtual void AddChild(iText.Kernel.Pdf.Layer.PdfLayer childLayer) {
if (childLayer.parent != null) {
throw new ArgumentException("Illegal argument: childLayer");
}
childLayer.parent = this;
if (children == null) {
children = new List<iText.Kernel.Pdf.Layer.PdfLayer>();
}
children.Add(childLayer);
}
/// <summary>Creates a title layer.</summary>
/// <remarks>
/// Creates a title layer. A title layer is not really a layer but a collection of layers
/// under the same title heading.
/// </remarks>
/// <param name="title">the title text</param>
/// <param name="document">the <CODE>PdfDocument</CODE></param>
/// <returns>the title layer</returns>
public static iText.Kernel.Pdf.Layer.PdfLayer CreateTitle(String title, PdfDocument document)
{
iText.Kernel.Pdf.Layer.PdfLayer layer = CreateTitleSilent(title, document);
document.GetCatalog().GetOCProperties(true).RegisterLayer(layer);
return(layer);
}