PDFlib 8 Windows COM/.NET Tutorial

Fig. 10.1
Creating a complex
page layout in logical
structure order (left)
and in visual order
(right). The right variant
uses item activation
for the first section
before continuing
fragments 4 and 6.
7
1
6
5
2 3
4
8
1
2
5
3
4 6
7
8
String optlist = "Title=Table parent=" + id_art;
id_table = p.begin_item("Table", optlist);
/* 5 create table structure and content */
p.set_text_pos(x_start_table, y_start_table);
...
p.end_item(id_table);
optlist = "Title=Insert parent=" + id_art;
id_insert = p.begin_item("P", optlist);
/* 6 create insert structure and content */
p.set_text_pos(x_start_table, y_start_table);
...
p.end_item(id_insert);
id_artifact = p.begin_item("Artifact", "");
/* 7+8 create header and footer */
p.set_text_pos(x_header, y_header);
...
p.set_text_pos(x_footer, y_footer);
...
p.end_item(id_artifact);
/* article may be continued on next page(s) */
...
p.end_item(id_art);
Generating page contents in visual order. The »logical order« approach forces the creator
to construct the page contents in logical order even if it might be easier to create it
in visual order: header, left column upper part, table, left column lower part, insert,
right column, footer. Using activate_item( ) this ordering can be implemented as follows:
/* create page layout in visual order */
id_header = p.begin_item("Artifact", "");
272 Chapter 10: PDF Versions and Standards (Edition for COM, .NET, and REALbasic)