Chapter 9: Application Control Flow
79
TI
-
89 / TI
-
92 Plus Developer Guide
Not for Distribution
Beta Version January 26, 2001
side — Which side of the screen the application’s window occupies. An
application sharing the screen with another application in split screen
mode can tell which side of the screen it is on, either AP_SIDE_A for
the top or left side, or AP_SIDE_B for the bottom or right side.
status — A copy of many of the status flags when the event occurred. This
includes the state of the
2
,
¥
, and
¤
keyboard modifier keys,
angle mode setting, busy indicator, and so forth.
info — Event dependent information. It may specify keypress information,
string paste pointer or handle, the address of which window to repaint,
application start up information, or new mode settings.
9.3. Commands
The type of an event can be identified by the contents of the command field of
the
Event
structure. Command numbers have symbolic names defined in tiams.h.
0x001 – 0x4FF Built-in strings
Character strings are kept together in a table for ease of language
customization. The menu system uses command numbers in this
range as an index into the string table. The default event handler
converts these commands into CM_PASTE_STRING events
containing the cross-referenced string pointer.
0x500 – 0x6FF Application-specific commands
Menu choices specific to each application.
0x700 – 0x7BF System commands
OS-generated commands.
0x700 CM_NULL
Sent to the active application when there are no other events to
process. The application might use this event to take care of some
background processing or update an animated display.
0x701 CM_INIT
Sent to each application once when the calculator is reset or
batteries are inserted. This command is used principally by the
built-in applications. The CM_INSTALL command is better suited
for initializing Flash applications.
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