LI-COR LI-6400, Manual

Page: 674 / 846

LPL Topics
Menus and Editors
23-52 Using the LI-6400
23
Figure 23-24 creates a window, and uses
STDMENU
to display the contents
of a CHAR array in that window as a menu with a menu bar. The user can
scroll through the contents, then exit using
escape
or
enter
.
The
-
and
¯
keys move the highlighted menu bar up and down. In general,
the cursor control keys defined for the standard menu function are given in
Table 5-2 on page 5-4.
What was selected?
Something very important is missing in Figure 23-24: there is no way to tell
what was selected. To do this, we must pass the
STDMENU function a Path
instead of a simple CHAR array, because STDMENU uses the Path status
registers to tell us where the cursor was when the user exits. We fix this prob-
lem in Figure 23-25 by making a Path to the menu items, then after
STD-
MENU is finished (if the user pressed enter ) we read in the selected line.
:CHAR
menuItems[] "This is item #1
This is item #2
and item #3
and 4
and 5
and 6\nand 7\nand 8\nand lastly, 9"
:FCT
Main
{
/* Make a window */
5 1 25 8 2 2 "My Menu"
WINDOW
/* Use a menu bar, and exit on esc or enter */
1 "" "\r" menuItems
STDMENU DROP
/* Cleanup the display */
1 1
DISPWIDTH DISPHEIGHT
0
WINDOW
CLEAR
}
Figure 23-24. Programming with STDMENU .
My Menu
Print
¨
Find
¨
ReFind
¨
CANCEL
¨
SELECT
This is item #1
This is item #2
and item #3
and 4
and 5
and 6