Chapter 11: Creating the User Interface
111
TI
-
89 / TI
-
92 Plus Developer Guide
Not for Distribution
Beta Version January 26, 2001
below. The numbers 0, 8, 16 represent the field indexes of the mode screen’s
dialog box.
BOOL ModeCallBack(WORD dlgId, DWORD dValue)
.
.
.
// Menu key press
if (dlgId == 20) {
WORD fkey = LO_WORD(dValue);
return fkey == KB_F1 ? 0 : fkey == KB_F2 ? 8 : fkey == KB_F3 ? 16 : -1;
}
11.4.2.8. POPUP
char *
TextPtr
, MENU *
Popup
, WORD
OptionIndex
A POPUP field defines a pop-up menu. The field is defined by a pointer to an
optional zero-terminated string used to label the pop-up, a pointer to a pop-up
MENU structure (as created by the resource compiler, for dynamic pop-ups use
HPOPUP), and the index (
OptionIndex
) into the
OptionList
passed to
Dialog
.
Note:
OptionList is a C structure, so indexes to it (like OptionIndex) are zero based. See the
Dialog
function entry point for an example.
The value stored in
OptionList
for this field is the value stored in the pop-up menu
structure as the identifier for the currently selected menu item. Default identifiers
for menus start from 1 and go up to the number of menu items in the menu. The
user may redefine these identifiers if needed. The call-back is called each time
the pop-up is modified. See section
11.4.4. Dialog Call-Backs
for a description
of the events involved.
11.4.2.9. SCROLL_REGION
WORD
x1
, WORD
y1
, WORD
Index0
, WORD
Index1
,
WORD
NumDspFields
, WORD
TotNumFields
,
WORD
FieldHeight
A scroll region defines a group of similar fields that will scroll as the user moves
through the fields. The region (using dialog box coordinates) of the dialog box
that scrolls is defined by the x and y parameters defined for all dialog fields to
specify the upper left coordinate of the scroll region along with an
x1
and
y1
field
to specify the lower right coordinate of the scroll region. The field index of the first
field that will scroll (
Index0
) followed by the index of the last field that is scrollable
(
Index1
) are specified next. These values are followed by the number of fields
that are displayed at one time (
NumDspFields
), the total number of scrollable
fields (
TotNumFields
), and finally the height in pixels of each field (
FieldHeight
).
All of the fields that are scrollable must be defined contiguously and have the
DF_SCROLLABLE bit set in their flag byte. The coordinates of the scrollable
fields are relative to the dialog box except that they may extend beyond the
To Next Page
Loading...
Need help?
General
