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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.
48 lines
2 KiB
Plaintext
48 lines
2 KiB
Plaintext
The {{KW|WINDOW}} graphics statement defines the coordinate dimensions of the current graphics viewport.
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{{PageSyntax}}
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:{{KW|WINDOW}} [[SCREEN] (x1, y1)-(x2,y2)]
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{{PageDescription}}
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* The statement allows a program to create a custom graphic coordinate system independent of the [[SCREEN (statement)|SCREEN]] mode used.
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* The coordinate values are defined as [[SINGLE]] precision values.
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* If the SCREEN option is used, row values increase from top to bottom. Negative coordinates can be used to the screen center.
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* If the SCREEN option is not used, row coordinates use the Cartesian system with highest row at top to lowest row at bottom.
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* A [[VIEW]] statement can change the viewport area.
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* All subsequent graphics statements will use the new coordinate system.
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* If no statement parameters are used, the viewport area is disabled.
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* Use [[CLS]] or [[CLS|CLS 1]] to clear the active WINDOW view port area.
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* [[RUN]] or a [[SCREEN (statement)|SCREEN]] statement will also disable the window viewport.
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* Note: '''QB64''' can create a custom sized window using [[_NEWIMAGE]].
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''Example:'' Using a WINDOW to amplify circle sizes. [[PMAP]] finds the corresponding WINDOW co-ordinates.
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{{CodeStart}}
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{{Cl|SCREEN}} 12
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{{Cl|WINDOW}} (0, 0)-(10, 10) 'uses Cartesian row co-ordinates
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{{Cl|PRINT}} "Click mouse to place a circle. Hit enter for next color."
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{{Cl|FOR...NEXT|FOR}} clr = 1 {{Cl|TO}} 15
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{{Cl|DO}}
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{{Cl|DO}}
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{{Cl|IF...THEN|IF}} {{Cl|_MOUSEBUTTON}}(1) {{Cl|THEN}}
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x! = {{Cl|PMAP}}({{Cl|_MOUSEX}}, 2) ' Convert mouse screen co-ordinates to window co-ordinates.
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y! = {{Cl|PMAP}}({{Cl|_MOUSEY}}, 3)
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{{Cl|CIRCLE}} (x!, y!), .2, clr
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{{Cl|PAINT}} {{Cl|STEP}}(0, 0), clr
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{{Cl|END IF}}
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{{Cl|LOOP}} {{Cl|WHILE}} {{Cl|_MOUSEINPUT}}
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{{Cl|LOOP}} {{Cl|UNTIL}} {{Cl|INKEY$}} = {{Cl|CHR$}}(13)
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{{Cl|NEXT}} '' ''
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{{CodeEnd}}
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{{PageSeeAlso}}
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* [[PMAP]]
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* [[VIEW]] {{text|(graphics view port)}}
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* [[VIEW PRINT]] {{text|(text view port)}}
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* [[_NEWIMAGE]], [[_LOADIMAGE]]
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{{PageNavigation}} |