[pygtk] passing arguments to functions

[Le Boulanger Yann]

Christopher Spears wrote:
> I am trying to create a GUI in glade that will allow
> me to convert temperatures.  Here is the code for the
> backend:
> 
> #!/usr/bin/env python
> 
> import sys
> try:
>  	import pygtk
>   	pygtk.require("2.0")
> except:
>   	pass
> try:
> 	import gtk
>   	import gtk.glade
> except:
> 	sys.exit(1)
> 
> class convertTempGUI:
> 	"""A GUI to convert temperatures"""
> 		
> 	def on_mainWindow_delete(self, widget, event):
> 		#print "I made it vanish!"
> 		gtk.main_quit()
> 		
> 	def convert_to_celsius(self, temp):
> 		return (temp - 32)/1.8
> 		
> 	def convert_to_fahrenheit(self, temp):
> 		return temp * 1.8 + 32
> 		
> 	def print_temp(self, widget, entry, rb1):
> 		temp = float(entry.get_text())
> 		if rb1.get_active():
> 			val = '%.2f C' % self.convert_to_celsius(temp)
> 		else:
> 			val = '%.2f F' % self.convert_to_fahrenheit(temp)
> 		print "Degrees temp: ", val
> 		
> 
> 	def __init__(self):
> 		
> 		#Set the Glade file
> 		self.gladefile = "convertempgui.glade"
> 	        self.wTree = gtk.glade.XML(self.gladefile) 
> 		
> 		#Create our dictionay and connect it
> 		dic = { "on_mainWindow_delete_event" :
> self.on_mainWindow_delete,
> 			"on_entry1_activate" : (self.print_temp, entry1,
> rb1)  }
> 		self.wTree.signal_autoconnect(dic)
> 
> if __name__ == "__main__":
> 	cTG = convertTempGUI()
> 	main = gtk.main()
> 
> However when I run the code, I get the following error
> message:
> 
> io at io-station-1 ./converTempGUI 111> python
> convertTemp01.py
> Traceback (most recent call last):
>   File "convertTemp01.py", line 49, in ?
>     cTG = convertTempGUI()
>   File "convertTemp01.py", line 44, in __init__
>     dic = { "on_mainWindow_delete_event" :
> self.on_mainWindow_delete,
> NameError: global name 'entry1' is not defined
> 
> Obviously, entry1 needs to be defined in order for the
> error message to go away.  However, I am confused
> about what to do next.  Originally, I hard coded the
> GUI with this script:
> 
> #!/usr/bin/python
> 
> import pygtk
> pygtk.require('2.0')
> import gtk
> 	
> class Conversion_GUI:
> 	def get_text(self, widget, entry):
> 		entry_text = entry.get_text()
> 		temp = float(entry_text)
> 		return temp
> 		
> 	def convert_to_celsius(self, temp):
> 		return (temp - 32)/1.8
> 		
> 	def convert_to_fahrenheit(self, temp):
> 		return temp * 1.8 + 32
> 		
> 	def print_temp(self, widget, entry, rb1):
> 		temp = float(entry.get_text())
> 		if rb1.get_active():
> 			val = '%.2f C' % self.convert_to_celsius(temp)
> 		else:
> 			val = '%.2f F' % self.convert_to_fahrenheit(temp)
> 		print "Degrees temp: ", val
> 		
> 		
> 	def __init__(self):
> 		self.temp = 0
> 		
> 		self.window = gtk.Window(gtk.WINDOW_TOPLEVEL)
> 		self.window.connect("destroy", lambda w:
> gtk.main_quit())
> 		self.window.set_title("Convert Temperatures")
> 		self.window.set_default_size(200,100)
> 		
> 		entry = gtk.Entry()
> 		entry.set_max_length(10)
> 		entry.set_text("0")
> 		label = gtk.Label("Enter Temp: ")
> 		label.set_justify(gtk.JUSTIFY_LEFT)
> 		entry.show()
> 		label.show()
> 		
> 		rb1 = gtk.RadioButton(None, "Fahrenheit")
> 		rb2 = gtk.RadioButton(rb1,"Celsius")
> 		rb1.show()
> 		rb2.show()
> 		
> 		box1 = gtk.VBox(False, 0)
> 		box2 = gtk.HBox(False, 0)
> 		box2.pack_start(rb1, False, False, 0)
> 		box2.pack_start(rb2, False, False, 0)
> 		box1.pack_start(box2, False, False, 0)
> 		
> 		box3 = gtk.HBox(False, 0)
> 		self.window.add(box1)
> 		
> 		box3.pack_start(label, False, False, 0)
> 		box3.pack_start(entry, True, True, 0)
> 		box1.pack_start(box3, False, False, 0)
> 		
> 		entry.connect("activate", self.print_temp, entry,
> rb1)
> 		quit_button = gtk.Button("Quit")
> 		quit_button.connect("clicked", lambda
> w:gtk.main_quit())
> 		convert_button = gtk.Button("Convert")
> 		convert_button.connect("clicked", self.print_temp,
> entry, rb1)
> 		convert_button.show()
> 		quit_button.show()
> 		
> 		box3.pack_start(convert_button, False, False, 0)
> 		box3.pack_start(quit_button, False, True, 0)
> 		
> 		box3.show()
> 		box2.show()
> 		box1.show()
> 		self.window.show()
> 		
> 	def main(self):
> 		gtk.main()
> 		return 0
> 	
> if __name__ == '__main__':
> 	convert = Conversion_GUI()
> 	convert.main()
> 
> 
> Is there a way for me to somehow extract entry1 from
> the glade file?  I would normally check the docs, but
> the PyGTK site seems to be down.
> _______________________________________________
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> Read the PyGTK FAQ: http://www.async.com.br/faq/pygtk/
> 

what you need is:

entry1 = self.wTree.get_widget("entry1")

but even that is not needed: the first argument that will be send to the
callback (what is called widget in your code [def print_temp(self,
widget, entry, rb1):]) will be the entry.

hope that's clear enough

Yann