easiest way to plot x,y graphically during run-time?

[Peter Pearson]

On Thu, 04 Jun 2009 03:29:42 -0500, Nick Craig-Wood wrote:
[snip]
> Here is a demo with pygame...
[snip]

And just for completeness, here is a demo with PyGUI, written
in similar style.  (I'm a PyGUI newbie, so constructive criticism
would be appreciated.)

from GUI import Window, View, application, Color, Task
from random import randrange

class Brownian( View ):

  def __init__( self, **kwargs ):
    View.__init__( self, **kwargs )
    width, height = self.size
    self.dots = [ (randrange(width), randrange(height))
                  for _ in range( 100 ) ]

  def step( self ):
    self.dots = [ (dot[0]+randrange(-1,2), dot[1]+randrange(-1,2))
                  for dot in self.dots ]
    self.invalidate()
    
  def draw( self, canvas, rectangle ):
    canvas.set_backcolor( Color( 0, 0, 0 ) )
    canvas.set_forecolor( Color( 0.3, 0.85, 0.25 ) )
    radius = 10
    canvas.erase_rect( rectangle )
    for dot in self.dots:
      canvas.stroke_oval( ( dot[0]-radius, dot[1]-radius,
                            dot[0]+radius, dot[1]+radius ) )


def main():

  size = 640, 480
  win = Window( size = size, title = "A test of PyGUI" )
  b = Brownian( size = size )
  win.add( b )
  win.show()
  t = Task( b.step, interval = 0.02, repeat = True, start = True )
  application().run()
  
if __name__ == "__main__":
    main()


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