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45 lines
1.9 KiB
Markdown
45 lines
1.9 KiB
Markdown
The **VIEW** statement creates a graphics view port area by defining the coordinate limits to be viewed.
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## Syntax
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> **VIEW** [SCREEN] (column1, row1)-(column2, row2)[, color][, border](SCREEN] (column1, row1)-(column2, row2)[, color][, border)]
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* When the SCREEN option is used, all coordinates are absolute and only graphics within the viewport area are plotted.
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* When the SCREEN option is not used, all coordinates are relative to the view port with the values of column1 and row1 being automatically added before plotting the point.
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* Coordinate values are for the top left and bottom right values of a box area of the screen mode used.
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* The color parameter specifies a background fill color for the area. None when omitted.
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* Border requires any valid color attribute to draw a line around the VIEW area if there is room for it.
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* VIEW without any parameters disables the previous viewport. [RUN](RUN) and [SCREEN](SCREEN) can also disable any VIEW port.
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* [CLS](CLS) or [CLS](CLS) clears the active graphics VIEW port area only. Disable a viewport before attempting to clear the entire screen!
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* **Note: QB64 [RUN](RUN) statements will not close [VIEW PRINT](VIEW-PRINT), [VIEW](VIEW) or [WINDOW](WINDOW) view ports presently!**
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## Example(s)
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Using SCREEN option with absolute screen coordinates.
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```vb
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SCREEN 12
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VIEW SCREEN (200, 200)-(400, 400), 1, 9 ' blue BG with light blue border
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CIRCLE (220, 220), 20, 11 ' using the actual screen coordinates
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```
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Using coordinates relative to the viewport box area.
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```vb
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SCREEN 12
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VIEW (200, 200)-(400, 400), 1, 9
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CIRCLE (20, 20), 20, 11 ' using coordinates inside of the viewport
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```
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> *Explanation:* The relative coordinates are automatically adjusted to place the object correctly. Any values outside of the box's area will not be displayed. Both examples should display the same screen image.
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## See Also
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* [VIEW PRINT](VIEW-PRINT) (text view port)
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* [WINDOW](WINDOW) (window view port)
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* [SCREEN](SCREEN), [CLS](CLS)
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