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| Graphics.HGL.Draw.Monad | | Portability | non-portable (requires concurrency) | | Stability | provisional | | Maintainer | libraries@haskell.org |
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| Description |
| The Draw monad, with graphical objects as a special case.
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| Synopsis |
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| Documentation |
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| type Graphic = Draw () |
| An abstract representation of an image.
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| data Draw a |
| Monad for sequential construction of images.
|  Instances | |
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| ioToDraw :: IO a -> Draw a |
| Embed an IO action in a drawing action.
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| bracket |
| :: Draw a | a pre-operation, whose value is passed to the
other two components.
| | -> (a -> Draw b) | a post-operation, to be performed on exit from
the bracket, whether normal or by an exception.
| | -> (a -> Draw c) | the drawing action inside the bracket.
| | -> Draw c | | | Wrap a drawing action in initialization and finalization actions.
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| bracket_ |
| :: Draw a | a pre-operation, whose value is passed to the
other two components.
| | -> (a -> Draw b) | a post-operation, to be performed on exit from
the bracket, whether normal or by an exception.
| | -> Draw c | the drawing action inside the bracket.
| | -> Draw c | | | A variant of bracket in which the inner drawing action does not
use the result of the pre-operation.
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| Produced by Haddock version 0.8 |
