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https://github.com/QB64-Phoenix-Edition/QB64pe.git
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6e01fc8dce
Added new _STRCMP and _STRICMP commands for quick string comparisons. Cleaned up QB64 to finish removing the QUI (quick user insert) code and folders. Altered UCASE and LCASE routines to be faster in some situations for us.
51 lines
2.3 KiB
Plaintext
51 lines
2.3 KiB
Plaintext
The {{KW|_PRINTWIDTH}} function returns the width in pixels of the [[_FONT]] or text [[STRING|string]] that a program will print.
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{{PageSyntax}}
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:{{Parameter|pixel_width}} = {{KW|_PRINTWIDTH}}({{Parameter|text_to_print$}}[, {{Parameter|destination_handle&}}])
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{{PageDescription}}
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* {{Parameter|text_to_print$}} is any literal or variable [[STRING]] value.
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* If the {{Parameter|destination_handle&}} is omitted, the current destination image or screen page is used.
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* Useful to find the width of the font print [[STRING|string]] before actually printing it.
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* Can be used with '''variable''' width fonts or '''no font''' at all unlike [[_FONTWIDTH]] which requires MONOSPACE fonts only.
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* '''_PRINTWIDTH cannot be used in SCREEN 0!'''
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''Example:'' SUB returns font or screen mode's text block size using _PRINTWIDTH and [[_FONTHEIGHT]] without a handle parameter.
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{{CodeStart}} '' ''
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{{Cl|DO}}
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{{Cl|INPUT}} "Enter Screen mode 1, 2 or 7 to 13: ", scr$
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mode% = {{Cl|VAL}}(scr$)
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{{Cl|LOOP}} {{Cl|UNTIL}} mode% > 0
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{{Cl|SCREEN (statement)|SCREEN}} mode%
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{{Cl|INPUT}} "Enter first name of TTF font to use or hit enter for text size: ", TTFont$
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{{Cl|IF}} {{Cl|LEN}}(TTFont$) {{Cl|THEN}} {{Cl|INPUT (file mode)|INPUT}} "Enter font height: ", hi$
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height& = {{Cl|VAL}}(hi$)
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{{Cl|IF}} height& > 0 {{Cl|THEN}} {{Cl|_FONT}} {{Cl|_LOADFONT}}("C:\Windows\Fonts\" + TTFont$ + ".ttf", height&, style$)
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TextSize wide&, high& 'get the font or current screen mode's text block pixel size
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{{Cl|_PRINTSTRING}} (20, 100), {{Cl|CHR$}}(1) + {{Cl|STR$}}(wide&) + " X" + {{Cl|STR$}}(high&) + " " + {{Cl|CHR$}}(2)
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{{Cl|END}}
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{{Cl|SUB}} TextSize (TextWidth&, TextHeight&)
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TextWidth& = {{Cl|_PRINTWIDTH}}("W") 'measure width of one font or text character
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TextHeight& = {{Cl|_FONTHEIGHT}} 'can measure normal text block heights also
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{{Cl|END SUB}} '' ''
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{{CodeEnd}}
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{{small|Code by Ted Weissgerber}}
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<center>'''Note:''' The SUB procedure does not need the font handle for font sizes after [[_FONT]] enables one.</center>
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{{PageSeeAlso}}
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* [[_FONTWIDTH]], [[_FONTHEIGHT]]
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* [[_NEWIMAGE]], [[_LOADFONT]]
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* [[_PRINTSTRING]], [[_FONT]]
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* [[Text Using Graphics]] (Demo)
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{{PageNavigation}} |