Skip to Main Content
Volume 7A: XView Programming Manual
book

Volume 7A: XView Programming Manual

by Dan Heller
October 1994
Intermediate to advanced content levelIntermediate to advanced
770 pages
22h 58m
English
O'Reilly Media, Inc.
Content preview from Volume 7A: XView Programming Manual
Figure 7-10. Sample panel with nonexclusive choices
Figure 7-10 represents a panel item that has two choices set, the first and the third. The rea-
son for this is that the panel’s value is set to 5, which is a mask that represents the first and
third bits. For example, 5 in binary is . . . 00101.* In the binary representation, the first and
third bits from the right are 1’s. This means that the first and third choices are selected. This
is how the value is interpreted on calls to xv_set() or xv_create(), and how it is re-
turned for calls to xv_get().
To get the image for a choice item’s current choice (assuming the choice item is a
Server_image choice):
Server_image image;
image = (Server_image)xv_get(item, PANEL_CHOICE_IMAGE,
xv_get(item, PANEL_VALUE));
For choice items whose
PANEL_CHOOSE_NONE value is TRUE, a PANEL_VALUE of -1 may be
set or returned, indicating that no choices are set for that item.
Setting PANEL_CHOOSE_NONE allows choice items to have no currently selected item. This
attribute is not applicable if PANEL_CHOOSE_ONE is FALSE.
7.10.3 Abbreviated Choices
Abbreviated choices are exclusive choices that either display no value or only the current
value. A menu is used to display all the choices. To implement abbreviated choice items, the
macro PANEL_CHOICE_STACK is used. This macro creates an abbreviated choice item that
displays only the current value. It is defined as:
PANEL_CHOICE, P
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Start your free trial

You might also like

Volume 6A: Motif Programming Manual

Volume 6A: Motif Programming Manual

David Brennan, Dan Heller, Paula Ferguson
Java™ Media APIs: Cross-Platform Imaging, Media, and Visualization

Java™ Media APIs: Cross-Platform Imaging, Media, and Visualization

Alejandro Terrazas, John Ostuni, Michael Barlow

Publisher Resources

ISBN: 9780937175873