|
| Graphics.HGL.Draw.Monad | | Portability | non-portable (requires concurrency) | | Stability | provisional | | Maintainer | libraries@haskell.org |
|
|
|
|
|
| Description |
| The Draw monad, with graphical objects as a special case.
|
|
| Synopsis |
|
|
|
| Documentation |
|
| type Graphic = Draw () |
| An abstract representation of an image.
|
|
| data Draw a |
| Monad for sequential construction of images.
|  Instances | |
|
|
| ioToDraw :: IO a -> Draw a |
| Embed an IO action in a drawing action.
|
|
| 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.
|
|
|
| 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.
|
|
|
| Produced by Haddock version 0.7 |
