Tkinter button events

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March 11th, 2004, 02:21 PM

xlordt

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Tkinter button events

Im tring to to create this little practice program that ... when you click on OK button another button shows up but it does not seem to be working or i dont know how to do it right.. any ideas?

Code:

from Tkinter import *

class GUI:

      def __init__ (self, master):

          frame = Frame(master)
          frame.pack()

          self.label = Label(frame,{"text":"This is just a test program"})
          self.label.pack()

          self.button = Button(frame)
          self.button.configure(text="OK",background="blue",foreground="white",command=self.buttonClick(frame));
          self.button.pack(side=LEFT)


      def buttonClick(self,master):

          self.button1 = Button(master,text="Click")
          self.button1.pack(side=LEFT)




if __name__ == "__main__":

   root = Tk()
   root_gui = GUI(root)
   root.mainloop()

March 11th, 2004, 03:33 PM

Grim Archon

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You were close....
You have to give your Tkinter button a reference to the function that is to be called - so just it's name not the complete thing

In which case you need to track the main root window so you can hang buttons on it. The easiest way is to use an instance variable like self.master. This restriction is a major reason why most Tkinter programs are base around classes.

Code:

from Tkinter import*

class GUI: 

      def __init__(self, master): 

          self.master = master
          frame = Frame(self.master)
          frame.pack()

          self.label = Label(frame, {"text": "This is just a test program"})
          self.label.pack()

          self.button = Button(frame)
          self.button.configure(text = "OK", background = "blue", 
                foreground = "white", command = self.buttonClick); 
          self.button.pack(side = LEFT)


      def buttonClick(self): 

          self.button1 = Button(self.master, text = "Click")
          self.button1.pack(side = LEFT)




if __name__ == "__main__": 
   root = Tk()
   root_gui = GUI(root)
   root.mainloop()

Grim

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March 11th, 2004, 03:42 PM

Grim Archon

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BTW out of interest, what text editor are you using? Your tabs are 3 chars and not 4. Not a problem if you only write your own stuff but it might get messy if you try pick-a-mix coding

March 11th, 2004, 03:45 PM

xlordt

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hehe nice.. good thing i was close

for now on i will just something like.. what you did

Code:

self.master = master

im using context on windows.. do you have anything better? as im looking fro a better text editor.. btw how did you add them colors to your code tags

March 11th, 2004, 05:18 PM

rebbit

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you could also use a lambda function, if you want to avoid creating too many instance variables (though the root window is pretty much always one you will want to give your entire class access to).

Code:

Button(self, text="Test", command=lambda: self.somefunction(somevariable))

March 11th, 2004, 05:57 PM

Boceifus

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Code:

print 'I think he used his py2html'
print 'You can find it :'

Here

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March 11th, 2004, 06:25 PM

Grim Archon

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You don't have to like my colours but if you use IDLE you might recognise them

. PHP's built in colouriser is

. I wanted something like it but that could generate more or less any markup. The GUI layout is a bit Mickey Mouse but I'm working on it, in fact I'm planning a complete re-work of most of the code

I prefer TextPad as an editor but I do use IDLE a lot.

Grim

Tkinter button events

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