Looping action while button is pushed in Glade

HaydenLovett · 12-17-2008, 04:02 PM

I have written a script that runs with a glade gui. When a button in glade is pushed I need it to run a piece of code, pause for 3 seconds and run it again in an on going loop until the button is pushed again. So the button is just an on/off control.

I can get it to run the code with out any problems but i cannot get it to stop when the button is pushed again.

I have simplified the code for here,

Code:

from pylab import *
import sys
import datetime
import os
import time

import pygtk
pygtk.require("2.0")
import gtk
import gtk.glade


###############################################################################
# End of Imports 



record = 0
view = 0

class gui:

	def __init__(self):
		global record
		global view
				
               

		
                #Set the Glade file
                self.gladefile = "graph4a.glade"  
                self.wTree = gtk.glade.XML(self.gladefile) 
              
                #Create our dictionay and connect it
                dic = { "on_record_toggled" : self.record_toggle,
                        "on_window1_destroy" : gtk.main_quit }
                
		self.wTree.signal_autoconnect(dic)



		
        def record_toggle(self, widget):
		global record
		if (record == 1):
			print "Record is turned off"
			record = 0                        
						    
                else:
                        print "Record is turned on" 
			record = 1
			os.system("perl modbus3c.pl")   #These 2 lines need to be continually looped
			time.sleep(3)			#whenever the record button is toggled on
							#until it is toggled off again
	

if __name__ == "__main__":
        hwg = gui()
        gtk.main()

scheidel21 · 12-18-2008, 01:23 AM

I have not really used glade and this may be grasping at straws but is the process that is started backgrounded because is it possible the execution time of the application going a lot longer than you think? Also are you by chance creating an endless loop. really the code to exit the loop needs to be in the loop itself. i.e.

Code:

While btnToggleTXT = "Record On"
   run(process)
   wait 3
   if btnToggleTXT = "Record Off" then
      exit while
   end if
End while

This isn't in any real programming language, but you get the logic behind it. The loop continues forever unless the exit criteria is met. In your scenario you might put a test in after the pause to test if the variable record is still 1 and if it is no longer 1 then you can exit your loop., However, does the application you are calling exit after it finishes too, if it continues to run then you may have to call code to kill the application or exit it. Just some ideas I may be wrong, as a matter of fact I don't see a loop in your code anywhere so it would seem to me you start execution but never end it. I wish I could help you more, but I don't know that much about perl or glade. Let us know if you get it figured out.