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353 :: Graphics Module Usage

• pux0r3 (orginal) [2014-02-02T20:59:08+01:00] view original

  Brief: I'm introducing myself to Nimrod, and am confused about this part of the graphics module documentation:

  template withEvents(surf: PSurface; event: expr; actions: stmt): stmt {.

  immediate.}

  Simple template which creates an event loop. Event is the name of the variable containing the TEvent object.

  If anyone can point to examples where this template (or graphics module usage in general exists) it would be greatly appreciated.

  Background: I'm looking into learning the Nimrod language and, as a game developer, am doing it by creating a game. Please excuse my incredibly basic questions as I spin up on the language. The language is newer than I'm used to experimenting with, if I'm failing to grok something in the basic introduction feel free to just throw me back at that.

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• gradha (orginal) [2014-02-02T21:17:12+01:00] view original

  Unfortunately many modules still lack proper public documentation. However, many of them include a trailing when isMainModule section usually for testing purposes. The graphics module contains a full example, including the use of withEvents. See if reading that helps.

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• pux0r3 (orginal) [2014-02-02T21:21:40+01:00] view original

  Thanks a lot, I'd just been browsing that module's source on GitHub and it's helped.

  For anyone following in my footsteps:

  https://github.com/Araq/Nimrod/blob/devel/lib/impure/graphics.nim

  http://nimrod-lang.org/tut2.html#statement-macros

  both helped. Basic code to throw up a window is:

  
  import graphics, sdl
  
  var surface: graphics.PSurface = newScreenSurface(640, 480)
  withEvents(surface, event):
    case event.kind
    of sdl.QUITEV:
      break
    else: nil
  Run

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