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139 lines
3.9 KiB
Markdown
139 lines
3.9 KiB
Markdown
The [_FULLSCREEN](_FULLSCREEN) statement attempts to make the program window fullscreen.
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## Syntax
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> [_FULLSCREEN](_FULLSCREEN) [*_STRETCH | _SQUAREPIXELS| _OFF*][, *_SMOOTH*]
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## Parameter(s)
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* _STRETCH default first choice attempts to mimic QBasic's full screens if possible. [_FULLSCREEN (function)](_FULLSCREEN-(function)) returns 1.
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* _SQUAREPIXELS alternate choice enlarges the pixels into squares on some monitors. [_FULLSCREEN (function)](_FULLSCREEN-(function)) returns 2
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* _OFF turns _FULLSCREEN off after full screen has been enabled. [_FULLSCREEN (function)](_FULLSCREEN-(function)) returns 0.
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* Second optional parameter *_SMOOTH* applies anti-aliasing to the stretched screen.
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## Description
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* **Set the [SCREEN](SCREEN) mode and text [WIDTH](WIDTH) when necessary first.** Otherwise there may be desktop view issues.
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* _FULLSCREEN with no parameters chooses _STRETCH or _SQUAREPIXELS (prioritizes _STRETCH to mimic QBasic if possible)
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* **Check the fullscreen mode with the [_FULLSCREEN (function)](_FULLSCREEN-(function)) function in your programs when a method is required.
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* It is advisable to get [INPUT](INPUT) from the user to confirm that fullscreen was completed or there were possible monitor incompatibilities.
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* If fullscreen is **not confirmed** with a [_FULLSCREEN (function)](_FULLSCREEN-(function)) return **greater than 0**, then disable with **_FULLSCREEN _OFF**.
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* **NOTE:** _FULLSCREEN can also be affected by custom [_FONT](_FONT) size settings and make program screens too large.
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## Example(s)
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Setting the screen mode first prevents enlargement of the desktop before the program window is set:
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```vb
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SCREEN 12
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_FULLSCREEN
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IF _FULLSCREEN = 0 THEN _FULLSCREEN _OFF 'check that a full screen mode initialized
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LINE (100, 100)-(500, 400), 13, BF
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```
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How fonts and _FULLSCREEN affect the program's window size.
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```vb
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SCREEN 0
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DO
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PRINT
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LINE INPUT "Enter MODE 1) ENLARGE WINDOW 2) FULL _SQUAREPIXELS 3) FULL _STRETCH: ", WMODE$
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PRINT
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IF WMODE$ = "1" THEN INPUT "SIZE 1 TO 9: ", ENLARGE%
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SELECT CASE ENLARGE%
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CASE 1, 2, 3, 4, 5: STYLE$ = "MONOSPACE, BOLD"
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CASE 6, 7, 8, 9: STYLE$ = "MONOSPACE"
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CASE ELSE: STYLE$ = "MONOSPACE"
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END SELECT
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SELECT CASE WMODE$
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CASE "1"
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full = _FULLSCREEN
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IF full > 0 THEN _FULLSCREEN _OFF
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f& = _LOADFONT("c:\windows\fonts\lucon.ttf", 13 + ENLARGE%, STYLE$)
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_FONT f&
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CASE "2"
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_FULLSCREEN _SQUAREPIXELS
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full = _FULLSCREEN
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IF full = 0 THEN GOSUB FCHECK
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CASE "3"
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_FULLSCREEN _STRETCH
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full = _FULLSCREEN
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IF full = 0 THEN GOSUB FCHECK
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END SELECT
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mode = _FULLSCREEN
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PRINT
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PRINT "_FULLSCREEN mode ="; mode,
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PRINT "PRESS ESC TO END OR ENTER TO CONTINUE..."
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DO: SLEEP: B$ = INKEY$: LOOP UNTIL B$ = CHR$(13) OR B$ = CHR$(27)
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GOSUB ClearFont
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LOOP UNTIL B$ = CHR$(27)
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ClearFont
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END
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FCHECK:
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Z3 = timer
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DO
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IF TIMER < Z3 THEN Z3 = Z3 - TIMER
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IF TIMER - Z3 > 4 THEN EXIT DO
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LOOP
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full = _FULLSCREEN
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IF full = 0 THEN _FULLSCREEN _OFF: SOUND 100, .75
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RETURN
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ClearFont:
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IF f& > 0 THEN
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_FONT 16 'select inbuilt 8x16 default font
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_FREEFONT f&
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END IF
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RETURN
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```
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Testing all fullscreen methods.
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```vb
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PRINT "Hello, world!"
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PRINT "Hit 1 for windowed mode;
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PRINT " 2 for _STRETCH"
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PRINT " 3 for _SQUAREPIXELS"
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PRINT " 4 for _STRETCH, _SMOOTH"
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PRINT " 5 for _SQUAREPIXELS, _SMOOTH"
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DO
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k$ = INKEY$
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SELECT CASE VAL(k$)
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CASE 1
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_FULLSCREEN _OFF
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CASE 2
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_FULLSCREEN _STRETCH
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CASE 3
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_FULLSCREEN _SQUAREPIXELS
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CASE 4
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_FULLSCREEN _STRETCH, _SMOOTH
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CASE 5
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_FULLSCREEN _SQUAREPIXELS, _SMOOTH
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END SELECT
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_LIMIT 30
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LOOP UNTIL _EXIT
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SYSTEM
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```
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## See Also
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* [_FULLSCREEN (function)](_FULLSCREEN-(function))
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* [_ALLOWFULLSCREEN](_ALLOWFULLSCREEN)
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* [_FONT](_FONT), [SCREEN](SCREEN)
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* [_SCREENIMAGE](_SCREENIMAGE)
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* [_SCREENMOVE](_SCREENMOVE), [_SCREENX](_SCREENX), [_SCREENY](_SCREENY)
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