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86 lines
3.8 KiB
Plaintext
86 lines
3.8 KiB
Plaintext
{{DISPLAYTITLE:_PRINTSTRING}}
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The [[_PRINTSTRING]] statement prints text [[STRING|strings]] using graphic column and row coordinate positions.
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{{PageSyntax}}
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: [[_PRINTSTRING]]({{Parameter|column}}, {{Parameter|row}}), {{Parameter|textExpression$}}[, {{Parameter|imageHandle&}}]
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{{PageParameters}}
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* {{Parameter|column}} and {{Parameter|row}} are [[INTEGER]] or [[LONG]] starting PIXEL (graphic) column and row coordinates to set text or custom fonts.
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* {{Parameter|textExpression$}} is any literal or variable [[STRING|string]] value of text to be displayed.
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* {{Parameter|imageHandle&}} is the optional image or destination to use. Zero designates current [[SCREEN (statement)|SCREEN]] page.
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{{PageDescription}}
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* The starting coordinate sets the top left corner of the text to be printed. Use [[_FONTHEIGHT]] to calculate that text or [[_FONT|font]] position
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* The [[_FONT]] size can affect the [[SCREEN (statement)|screen]] and row heights.
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** Custom fonts are not required. [[_PRINTSTRING]] can print all [[ASCII]] characters.
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* [[_PRINTWIDTH]] can be used to determine how wide a text print will be so that the screen width is not exceeded.
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* If the {{Parameter|imageHandle&}} is omitted, the current image, page or screen destination is used.
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* Can use the current font alpha blending with a designated image background. See the [[_RGBA]] function example.
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* Use the [[_PRINTMODE]] statement before printing to set how the background is rendered.
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** Use the [[_PRINTMODE (function)]] to find the current _PRINTMODE setting.
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* In SCREEN 0 (text only), [[_PRINTSTRING]] works as one-line replacement for '''LOCATE x, y: PRINT text$''', without changing the current cursor position.
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{{PageExamples}}
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''Example 1:'' Printing those unprintable [[ASCII]] control characters is no longer a problem.
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{{CodeStart}} '' ''
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{{Cl|SCREEN}} {{Cl|_NEWIMAGE}}(800, 600, 256)
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{{Cl|FOR...NEXT|FOR}} code = 0 {{Cl|TO}} 31
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chrstr$ = chrstr$ + {{Cl|CHR$}}(code) + {{Cl|SPACE$}}(1)
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{{Cl|NEXT}}
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{{Cl|_FONT}} {{Cl|_LOADFONT}}("C:\Windows\Fonts\Cour.ttf", 20, "MONOSPACE") 'select monospace font
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{{Cl|_PRINTSTRING}} (0, 16), chrstr$
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{{Cl|END}} '' ''
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{{CodeEnd}}
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{{OutputStart}}
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☺ ☻ ♥ ♦ ♣ ♠ • ◘ ○ ◙ ♂ ♀ ♪ ♫ ☼ ► ◄ ↕ ‼ ¶ § ▬ ↨ ↑ ↓ → ← ∟ ↔ ▲ ▼
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{{OutputEnd}}
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''Example 2:'' Rotating a text string around a graphic object.
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{{CodeStart}} '' ''
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{{Cl|SCREEN (statement)|SCREEN}} 12 '' ''
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{{Cl|DIM}} row {{Cl|AS}} {{Cl|INTEGER}}, cnt {{Cl|AS}} {{Cl|INTEGER}}, cstart {{Cl|AS}} {{Cl|SINGLE}}, cend {{Cl|AS}} {{Cl|SINGLE}}
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{{Cl|DIM}} xrot {{Cl|AS}} {{Cl|INTEGER}}, yrot {{Cl|AS}} {{Cl|INTEGER}}, scale {{Cl|AS}} {{Cl|INTEGER}}
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' {{Cl|_FULLSCREEN}} 'full screen optional
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cstart = 0: cend = 8 * {{Cl|ATN}}(1)
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xrot = 6: yrot = 60: scale = 4
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row = 1
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{{Cl|CIRCLE}} (320, 240), 15, 9: {{Cl|PAINT}} {{Cl|STEP}}(0, 0), 9
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{{Cl|DO}}
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{{Cl|FOR...NEXT|FOR}} i = cstart {{Cl|TO}} cend {{Cl|STEP}} .04
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x = 300 + (scale * 40 - (row * xrot)) * {{Cl|COS}}(i)
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y = 200 + (scale * 40 - (row * yrot)) * {{Cl|SIN}}(i)
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cnt = cnt + 1
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{{Cl|COLOR}} 7: {{Cl|_PRINTSTRING}} (x, y), "HELLO WORLD!", 0 'display
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{{Cl|IF}} cnt = {{Cl|LEN}}(text$) * 8 {{Cl|THEN}} cnt = 0: {{Cl|EXIT DO}}
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{{Cl|_DISPLAY}}
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{{Cl|COLOR}} 0: {{Cl|_PRINTSTRING}} (x, y), "HELLO WORLD!", 0 'erase
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{{Cl|_DELAY}} 0.02
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{{Cl|NEXT}}
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{{Cl|LOOP}} {{Cl|UNTIL}} {{Cl|INKEY$}} = {{Cl|CHR$}}(27) 'escape key exit
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{{Cl|COLOR}} 15
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{{Cl|END}} '' ''
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{{CodeEnd}}
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{{small|Adapted from code by Unseen Machine}}
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{{PageSeeAlso}}
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* [[_NEWIMAGE]], [[_PRINTWIDTH]], [[_PRINTMODE]]
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* [[_CONTROLCHR]] {{text|(turns [[ASCII]] control characters OFF or ON)}}
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* [[_FONT]], [[_LOADFONT]], [[_FONTHEIGHT]], [[_FONTWIDTH]]
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* [[_SCREENIMAGE]], [[_SCREENPRINT]]
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* [[Text Using Graphics]]
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{{PageNavigation}}
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