Re: Inter script updates

[Hans Breuer <hans breuer org>]

At 07.05.2009 14:46, Philip Cavaco wrote:
> Hello,
>
> I want to put this question out there before diving into the code. I am
> trying to write a python script which can update the active_display
> multiple times within the same script. Basically an animation.
>
> I have been experimenting with the different update methods
> (add_update_all, update_connectitons, update_extends, flush) at
> different levels (dia, dia.active_display(), dia.active_display().diagram).
>
> Does anyone have suggestions on how I can get this working?
Given that display drawing is done in idle update your blinking needs allow
idle to happen. Updated script attached.

        Hans


-------- Hans "at" Breuer "dot" Org -----------
Tell me what you need, and I'll tell you how to
get along without it.                -- Dilbert

import dia
import time
import gobject

class Blinker :
        def __init__ (self, d, e, i) :
                self.repeats = i
                self.dia = d
                self.ell = e
        def blink (self) :
                n = self.repeats
                self.repeats -= 1
                # requeue this handler 
                if n % 2 == 0 :
                        self.ell.properties['fill_colour'] = "red"
                else :
                        self.ell.properties['fill_colour'] = "white"
                self.dia.add_update_all()
                self.dia.flush()
                
                return n > 0
        
def main(data,flags):
    """
    
    Arguments:
    - `data`:
    - `flags`:
    """
    d= dia.active_display().diagram
    layer = d.data.active_layer
    objects = layer.objects
    #find an ellipse object
    ellipse = None
    for obj in objects:
        if obj.type.name == "Standard - Ellipse":
            ellipse = obj
            break
    if not ellipse:
        #no ellipse was found don't do anything
        return
  
    b = Blinker(d, ellipse, 10)
    gobject.timeout_add(250, b.blink)

dia.register_action("Blinker","Blinker",
                    "/DisplayMenu/Dialogs/DialogsExtensionStart",
                    main)