Texas Instruments TI-89 Developer's Guide

Appendix A: System Routines — Windows
1155
TI
-
89 / TI
-
92 Plus Developer Guide
Not for Distribution
Beta Version January 26, 2001
WinBeginPaint
Declaration:
void
WinBeginPaint
(WINDOW *
w
)
Category(ies):
Windows
Description:
Save the current screen state and sets up the screen to draw for the
current window.
WinBeginPaint
is always paired with
WinEndPaint
which
restores the screen state.
Inputs:
w
— WINDOW struct of a previously opened window.
Outputs:
None
Assumptions:
If an app has only one window then it can do a
WinBeginPaint
on its
CM_ACTIVATE message and a
WinEndPaint
on its CM_DEACTIVATE
message. If an app has multiple windows then routines that draw to
separate windows should have
WinBeginPaint
and
WinEndPaint
pairs
around them.
Side Effects:
The screen is setup to draw for this window.
Availability:
All versions of the TI
-
89 / TI
-
92 Plus.
TI
-
89 / TI
-
92 Plus
Differences:
None
See Also: WinEndPaint
Example:
CM_ACTIVATE:
EV_defaultHandler(e);
WinBeginPaint( &appW );
WinActivate( &appW );
WinStr( &appW, "Just activated\n" );
break;
case CM_DEACTIVATE:
WinEndPaint( &appW );
break;

Texas Instruments TI-89 Specifications

General

Display size (HxV)	100 x 160 mm
Memory type	639K FLASH ROM, 188K bytes RAM
Compatible operating systems	Operating System 2.09
Battery type	AAA