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program screen_demo;
{---------------------------------------------------------------------------
CncWare
(c) Copyright 2000
---------------------------------------------------------------------------
Filename..: screen_demo.pp
Programmer: Ken J. Wright
Date......: 08/24/2000
Purpose - Demonstrate Linux screen saving/restoring with oCrt.
-------------------------------<< REVISIONS >>--------------------------------
Ver | Date | Prog| Description
-------+----------+-----+----------------------------------------------------
1.00 | 08/24/00 | kjw | Initial Release.
------------------------------------------------------------------------------
}
uses ocrt;
var
i,j : integer;
pb : pnScreenBuf;
begin
For i := 1 to 24 Do Begin
TextColor(i);
For j := 1 to 79 Do Write(chr(j+32));
writeln;
End;
nGrabScreen(pb);
Write('screen stored, press a key to clear');readkey;
NormVideo;
ClrScr;
Write('press a key to restore previous screen');readkey;
nPopScreen(pb);
GotoXY(1,nMaxRows);
Write('press a key to restore to a smaller window');readkey;
ClrScr;
Window(10,5,70,20);
nPopScreen(pb);
Window(1,1,nMaxCols,nMaxRows);
GotoXY(1,nMaxRows);
Write('press a key to offset stored screen');readkey;
ClrScr;
nPopScreen(pb,5,3);
GotoXY(1,nMaxRows);
Write('press a key to restore a portion of this screen in multiple ');readkey;
nGrabScreen(pb,5,3,8,10);
ClrScr;
For i := 0 to 7 Do For j := 0 to 1 Do
nPopScreen(pb,i*10+1,j*12+1);
GotoXY(1,nMaxRows);
{ make sure to clean up! }
nReleaseScreen(pb);
end.
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