CHAPTER 8
678
Interactive Features
TABLE 8.71 Additional entries common to all fields containing variable text
KEY
TYPE
VALUE
DA
string
(Required; inheritable)
The
default appearance string
containing a sequence of valid
page-content graphics or text state operators that define such properties as the field’s
text size and color.
(Optional; inheritable)
A code specifying the form of
quadding
(justification) to be
used in displaying the text:
0
1
2
Left-justified
Centered
Right-justified
Q
integer
Default value: 0 (left-justified).
DS
text string
text string or
text stream
(Optional; PDF 1.5)
A default style string, as described in “Rich Text Strings” on page
(Optional; PDF 1.5)
A rich text string, as described in “Rich Text Strings” on page 680.
RV
The new appearance stream becomes the normal appearance (
N
) in the appear-
ance dictionary associated with the field’s widget annotation (see Table 8.19 on
plication must create one and store it in the annotation dictionary’s
AP
entry.)
In PDF 1.5, form fields that have the RichText flag set (see Table 8.77) specify for-
matting information as described in “Rich Text Strings” on page 680. For these
fields, the conventions described below are not used, and the entire annotation
appearance is regenerated each time the value is changed.
For non-rich text fields, the appearance stream—which, like all appearance
streams, is a form XObject—has the contents of its form dictionary initialized as
follows:
•
The resource dictionary (
Resources
) is created using resources from the inter-
active form dictionary’s
DR
entry (see Table 8.67); see also implementation note
•
The lower-left corner of the bounding box (
BBox
) is set to coordinates (0, 0) in
the form coordinate system. The box’s top and right coordinates are taken from