PDFlib 8 Windows COM/.NET Tutorial

do
{
String optlist = "verticalalign=justify linespreadlimit=120%";
p.begin_page_ext(0, 0, "width=a4.width height=a4.height");
/* Fill the first column */
result = p.fit_textflow(tf, llx1, lly1, urx1, ury1, optlist);
/* Fill the second column if we have more text*/
if (!result.equals("_stop"))
result = p.fit_textflow(tf, llx2, lly2, urx2, ury2, optlist);
p.end_page_ext("");
/* "_boxfull" means we must continue because there is more text;
* "_nextpage" is interpreted as "start new column"
*/
} while (result.equals("_boxfull") || result.equals("_nextpage"));
/* Check for errors */
if (!result.equals("_stop"))
{
/* "_boxempty" happens if the box is very small and doesn't hold any text at all.
*/
if (result.equals( "_boxempty"))
throw new Exception("Error: " + p.get_errmsg());
else
{
/* Any other return value is a user exit caused by the "return" option;
* this requires dedicated code to deal with.
*/
}
}
p.delete_textflow(tf);
8.2.2 Paragraph Formatting Options
In the previous example we used default settings for the paragraphs. For example, the
default alignment is left-justified, and the leading is 100% (which equals the font size).
In order to fine-tune the paragraph formatting we can feed more options to add_
textflow( ). For example, we can indent the text 15 units from the left and 10 units from
the right margin. The first line of each paragraph should be indented by an additional
20 units. The text should be justified against both margins, and the leading increased to
140%. Finally, we’ll reduce the font size to 8 points. To achieve this, extend the option
list for add_textflow( ) as follows (see Figure 8.15):
String optlist =
"leftindent=15 rightindent=10 parindent=20 alignment=justify " +
"leading=140% fontname=Helvetica fontsize=8 encoding=unicode";
8.2.3 Inline Option Lists and Macros
The text in Figure 8.15 is not yet perfect. The headline »Have a look at our new paper
plane models!« should sit on a line of its own, should use a larger font, and should be
centered. There are several ways to achieve this.
210 Chapter 8: Text and Table Formatting (Edition for COM, .NET, and REALbasic)