OpenOffice.org OpenOffice - 3.3 Manuel d'utilisateur télécharger pdf (Page 398)

include graphics or edit the text except in the field dialog (not in the body of the

document). You also cannot format part of the text (for example, bolding one word

but not the others), but you can format the field to affect all of the field contents (for

example, bolding all of the words). You cannot include a cross-reference or other field

in the text.

Hidden text

With hidden text (a word, phrase, or sentence), you have only two choices: show or

hide. If the condition you specify is met, the text is hidden; if the condition is not met,

the text is displayed. The disadvantages are the same as for conditional text: you

cannot include graphics, edit the text in the body of the document, format part of the

text, or include a field.

Hidden paragraphs

Hidden paragraphs are like any other paragraphs, but you can specify a condition

under which the paragraph is not displayed or printed. A blank paragraph can also be

hidden—for example, if a database field has no content for the current record. This is

very useful when merging an address into a letter: if you allow two lines for the street

address and the database record uses only one line, you can prevent the blank line

from appearing in your document. You can include graphics, edit the text in the body

of the document, format any part of the text, and include fields.

Hidden sections

Hidden sections are like hidden paragraphs, but they can include more than one

paragraph—for example, a heading plus one or more paragraphs. However, a section

cannot contain less than a paragraph, so you cannot use this method for single words

or phrases. The contents of a hidden section behave just like the contents of any

other part of the document, but you can specify a condition under which the section

is not displayed or printed. In addition, you can password protect a section.

Plan your conditional content

Conditions are what programmers call logical expressions. You must formulate a

logical expression for each condition because a condition is always either true (met)

or false (not met). You can use the same condition in many places in your document,

for different types of conditional content.

To make conditional content work, you need to:

1) Choose or define a variable.

2) Define a logical expression (condition) involving the selected variable.

Choose or define a variable

You can use the following variables in your condition:

• User-defined variables

• Predefined OpenOffice.org variables, which use statistical values from the

document properties

• User data

• Database field contents—for example from your address book

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OpenOffice.org OpenOffice - 3.3 Manuel d'utilisateur Page 398