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wdemo.bas
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BASIC Source File
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1992-07-05
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9KB
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226 lines
' +----------------------------------------------------------------------+
' | |
' | BASWIZ Copyright (c) 1990-1992 Thomas G. Hanlin III |
' | |
' | The BASIC Wizard's Library |
' | |
' +----------------------------------------------------------------------+
DECLARE FUNCTION FEOF% (Handle%)
DECLARE FUNCTION FReadLn$ (BYVAL Handle%)
DECLARE SUB FDone ()
DECLARE SUB FInit (Handles%, ErrCode%)
DECLARE SUB FOpen (File$, FMode$, BufferLen%, Handle%, ErrCode%)
DECLARE SUB GetDisplay (Adapter%, Mono%)
DECLARE SUB WClear (BYVAL Handle%)
DECLARE SUB WCollapse (Handle%)
DECLARE SUB WColor (BYVAL Handle%, BYVAL Fore%, BYVAL Back%)
DECLARE SUB WCopy (BYVAL FromHandle%, BYVAL ToHandle%)
DECLARE SUB WDone ()
DECLARE SUB WExplode (Handle%)
DECLARE SUB WFixColor (BYVAL Convert%)
DECLARE SUB WFrame (BYVAL Handle%, BYVAL Frame%, BYVAL Fore%, BYVAL Back%)
DECLARE SUB WGetVSize (BYVAL Handle%, Rows%, Columns%)
DECLARE SUB WHidden (BYVAL Handle%, Hidden%)
DECLARE SUB WHide (BYVAL Handle%, BYVAL Hide%)
DECLARE SUB WInit (Rows%, Columns%, ErrCode%)
DECLARE SUB WLocate (BYVAL Handle%, BYVAL Row%, BYVAL Column%)
DECLARE SUB WOpen (Rows%, Columns%, SRow1%, SCol1%, SRow2%, SCol2%, Handle%, ErrCode%)
DECLARE SUB WPlace (BYVAL Handle%, BYVAL Row%, BYVAL Column%)
DECLARE SUB WShadow (BYVAL Handle%, Shadow$, BYVAL Fore%, BYVAL Back%)
DECLARE SUB WSize (BYVAL Handle%, BYVAL Rows%, BYVAL Columns%)
DECLARE SUB WTitle (BYVAL Handle%, Title$, BYVAL Fore%, BYVAL Back%)
DECLARE SUB WUpdate ()
DECLARE SUB WView (BYVAL Handle%, BYVAL Row%, BYVAL Column%)
DECLARE SUB WWrite (BYVAL Handle%, St$)
DECLARE SUB WWriteLn (BYVAL Handle%, St$)
DECLARE FUNCTION Center$ (St$)
DEFINT A-Z
Rows = 25: Columns = 80 ' define display size
WInit Rows, Columns, ErrCode ' initialize VWS
IF ErrCode THEN ' stop if we couldn't...
PRINT "Sorry, insufficient memory to run Demo."
END
END IF
FInit 15, ErrCode ' initialize file handler
FOpen "WDEMO.DAT", "RT", 256, TextFile, ErrCode ' open file for Read, Text
IF ErrCode THEN
PRINT "Unable to access WDEMO.DAT file."
FDone
END
END IF
IF INSTR(COMMAND$, "/B") THEN
Mono = -1
ELSE
GetDisplay Adapter, Mono
END IF
WFixColor Mono
Handle0 = 0 ' use background handle
St$ = "Demonstration of The BASIC Wizard's Library"
WWriteLn Handle0, Center$(St$)
WWriteLn Handle0, ""
St$ = "Copyright (c) 1990-1992 Thomas G. Hanlin III"
WWriteLn Handle0, Center$(St$)
WWriteLn Handle0, ""
WWriteLn Handle0, ""
DO UNTIL FEOF(TextFile) ' read text from file and
WWriteLn Handle0, FReadLn$(TextFile) ' ...print it to the
LOOP ' ...virtual screen
FDone ' terminate file handler
WLocate Handle0, 25, 1
St$ = "Press the space bar for a virtual window demonstration."
WWrite Handle0, Center$(St$)
WUpdate ' update the display
DO
LOOP UNTIL INKEY$ = " "
' ------------ This sets up the second demo screen --------------
WOpen Rows, Columns, 7, 5, 22, 45, Handle1, ErrCode
IF ErrCode THEN
PRINT "I'm sorry, there's not enough memory available!"
WDone
END
END IF
WCopy Handle0, Handle1 ' copy text to new window
WColor Handle0, 0, 2 ' recolor the background
WClear Handle0 ' clear it
WLocate Handle0, 1, 1 ' home the cursor
WWriteLn Handle0, " This is Window #0, the background screen"
WColor Handle0, 15, 2
WLocate Handle0, 14, 48
WWriteLn Handle0, "This is a slow-motion demo!"
WColor Handle0, 0, 2
WLocate Handle0, 25, 1
WWrite Handle0, Center$("Press the <ESC> key to exit")
WFrame Handle1, 2, 14, 3 ' set frame (double lines)
WTitle Handle1, " Window #1 ", 5, 3 ' set title
WExplode Handle1 ' "explode" it on
Rows2 = 10: Columns2 = 40
Row2 = 9: Col2 = 35
WOpen Rows2, Columns2, Row2, Col2, 17, 70, Handle2, ErrCode
IF ErrCode THEN
PRINT "I'm sorry, there's not enough memory available!"
WDone
END
END IF
WFrame Handle2, 1, 4, 1 ' set frame (single lines)
WTitle Handle2, " Window #2 ", 14, 1 ' set title
WShadow Handle2, CHR$(255), 8, 0 ' set shadow
WColor Handle2, 7, 1 ' set colors
WClear Handle2 ' clear to new colors
WWriteLn Handle2, "Adding virtual windows to"
WWriteLn Handle2, "your programs uses only about"
WWriteLn Handle2, "5K RAM, plus extra memory for"
WWriteLn Handle2, "each window (around 4K for a"
WWriteLn Handle2, "full 25x80 virtual screen,"
WWriteLn Handle2, "which is larger than you'll"
WWriteLn Handle2, "need for most windows)."
WWriteLn Handle2, ""
WWriteLn Handle2, ""
WWrite Handle2, " Look Ma, No Hands!"
WExplode Handle2 ' "explode" it on
St$ = "Just a little BASIC Wizardry..." ' a tiny one-line window!
Rows = 1: Columns = LEN(St$) + 1
WOpen Rows, Columns, 3, 38, 3, 37 + LEN(St$), Handle3, ErrCode
IF ErrCode THEN
PRINT "I'm sorry, there's not enough memory available!"
WDone
END
END IF
WColor Handle3, 15, 4 ' set color
WWrite Handle3, St$ ' no <CR><LF> or it scrolls
WOpen 2, 10, 16, 14, 17, 23, Handle4, ErrCode
IF ErrCode THEN
PRINT "I'm sorry, there's not enough memory available!"
WDone
END
END IF
WFrame Handle4, 1, 0, 7 ' set frame (single lines)
WColor Handle4, 0, 7 ' set colors
WClear Handle4 ' clear to new colors
WHide Handle4, 1 ' hide the window
WWriteLn Handle4, " Windows"
WWrite Handle4, " Can HIDE"
WUpdate ' pop on the micro windows
' ------------- The second screen is on- let's animate it! ------------
Counter1H = 0 ' for Window #1
Direction1H = 1
Counter1V = 0
Direction1V = 0
Counter2A = 0 ' for Window #2
Counter2B = 0
Direction2 = 1
DO
' The following four statements do the main work. The rest mostly -----
' calculates the information for the next step in the animation. -------
WView Handle1, 1 + Counter1V, 1 + Counter1H ' set viewport
WPlace Handle2, Row2 - Counter2B, Col2 + Counter2B ' screen pos'n
WSize Handle2, Rows2 - Counter2B, Columns2 - Counter2B * 2 ' window size
WUpdate ' display it
Counter2A = Counter2A + 1
IF (Counter2A AND 1) = 0 THEN
Counter2A = 0
Counter2B = Counter2B + Direction2
IF Counter2B < 1 OR Counter2B > 5 THEN
Direction2 = -Direction2
END IF
END IF
Counter1H = Counter1H + Direction1H
Counter1V = Counter1V + Direction1V
IF Counter1H < 0 THEN
Counter1H = 0
Direction1H = 0
Direction1V = -1
ELSEIF Counter1H > 39 THEN
Counter1H = 39
Direction1H = 0
Direction1V = 1
ELSEIF Counter1V < 0 THEN
Counter1V = 0
Direction1V = 0
Direction1H = 1
WHidden Handle4, Hidden
WHide Handle4, NOT Hidden
ELSEIF Counter1V > 9 THEN
Counter1V = 9
Direction1V = 0
Direction1H = -1
END IF
DEF SEG = 0 ' delay a while so we can see
t = PEEK(&H46C) ' what's going on
WHILE t = PEEK(&H46C): WEND
t = PEEK(&H46C)
WHILE t = PEEK(&H46C): WEND
LOOP UNTIL INKEY$ = CHR$(27) ' continue until <ESC> is pressed
' -------------- All done, time to terminate and exit -----------------
WCollapse Handle3 ' collapse windows in mixed order
WCollapse Handle1
WCollapse Handle2
WCollapse Handle4
WDone ' terminate VWS
junk& = SETMEM(999999) ' give QB its memory back
END
FUNCTION Center$ (St$) ' ------ used for centering lines on the screen
WGetVSize 0, Rows, Columns ' get size of display
IF LEN(St$) > Columns THEN
Center$ = LEFT$(St$, Columns) ' truncate if string is too long
ELSE
Center$ = SPACE$((Columns - LEN(St$) + 1) \ 2) + St$ ' center it
END IF
END FUNCTION