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https://github.com/QB64-Phoenix-Edition/QB64pe.git
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59 lines
2.1 KiB
Plaintext
59 lines
2.1 KiB
Plaintext
{{DISPLAYTITLE:_FONTHEIGHT}}
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The [[_FONTHEIGHT]] function returns the font height of a font handle created by [[_LOADFONT]].
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{{PageSyntax}}
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:{{Parameter|pixelHeight%}} = [[_FONTHEIGHT]][({{Parameter|fontHandle&}})]
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{{PageDescription}}
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* Returns the height of the last font used if a handle is not designated.
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* If no font is set it returns the current screen mode's text block height.
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{{PageExamples}}
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''Example:'' Finding the [[_FONT|font]] or text block size of printed [[STRING|string]] characters in graphic [[SCREEN]] modes.
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{{CodeStart}} '' ''
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DO
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{{Cl|INPUT}} "Enter Screen mode 1, 2 or 7 to 13 or 256, 32 for {{Cl|_NEWIMAGE}}: ", scr$
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mode% = {{Cl|VAL}}(scr$)
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{{Cl|LOOP}} {{Cl|UNTIL}} mode% > 0
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{{Cl|SELECT CASE}} mode%
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{{Cl|CASE}} 1, 2, 7 {{Cl|TO}} 13: {{Cl|SCREEN}} mode%
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{{Cl|CASE}} 256, 32: {{Cl|SCREEN}} {{Cl|_NEWIMAGE}}(800, 600, mode%)
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{{Cl|CASE ELSE}}: {{Cl|PRINT}} "Invalid mode selected!": {{Cl|END}}
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{{Cl|END SELECT}}
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{{Cl|INPUT}} "Enter first name of TTF font to use or hit enter for text block size: ", TTFont$
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{{Cl|IF...THEN|IF}} {{Cl|LEN}}(TTFont$) {{Cl|THEN}} {{Cl|INPUT}} "Enter font height: ", hi$
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height& = {{Cl|VAL}}(hi$)
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{{Cl|IF...THEN|IF}} height& > 0 {{Cl|THEN}}
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fnt& = {{Cl|_LOADFONT}}("C:\Windows\Fonts\" + TTFont$ + ".ttf", height&, style$)
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{{Cl|IF...THEN|IF}} fnt& <= 0 {{Cl|THEN}} {{Cl|PRINT}} "Invalid Font handle!": {{Cl|END}}
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{{Cl|_FONT}} fnt&
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{{Cl|END IF}}
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TextSize wide&, high& 'get the font or current screen mode's text block pixel size
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{{Cl|_PRINTSTRING}} (20, 100), "Block size = " + {{Cl|CHR$}}(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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{{PageSeeAlso}}
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* [[_FONTWIDTH]], [[_FONT]]
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* [[_PRINTWIDTH]], [[_PRINTSTRING]]
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* [[SCREEN]], [[_LOADFONT]]
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* [[Text Using Graphics]] (Demo)
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{{PageNavigation}}
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