Re: update of elements in GUI
In article 24dc97b3-a8b5-4638-9cf5-a397f1eae...@q16g2000prf.googlegroups.com, Jah_Alarm jah.al...@gmail.com wrote: hi, I've already asked this question but so far the progress has been small. I'm running Tkinter. I have some elements on the screen (Labels, most importantly) which content has to be updated every iteration of the algorithm run, e.g. Iteration = [i] for i in range(n), n=100. I'm using the update_idletasks() command in the function itself after the variable.set(...) command. The variable type is IntVar(), and the mistake I'm getting is 'IntVar instance has no attribute 'update_idletasks'. No updates are displayed, of course. You have to call update_idletasks on a Tkinter *widget*, not a variable. You can call it on your window (Tk or Toplevel instance) or on your label for example. This way, it should work. Without the GUI the algorithm (it's a genetic algorithm) is working fine, but I need to make it available to other people via GUI cheers, Alex -- http://mail.python.org/mailman/listinfo/python-list
Re: update of elements in GUI
thanks. The thing is, the objects actually get updated without this command, but when I run the GUI outside of python shell (i.e. in command prompt as python filename.py or compile it to .exe file) the objects do not get updated. I tried Label(mainframe,textvariable=var).grid(column=1,row=1).update_idletasks() and mainframe.update_idletasks() but it still doesn't work. On Aug 17, 7:19 pm, Eric Brunel eric.bru...@pragmadev.nospam.com wrote: In article 24dc97b3-a8b5-4638-9cf5-a397f1eae...@q16g2000prf.googlegroups.com, Jah_Alarm jah.al...@gmail.com wrote: hi, I've already asked this question but so far the progress has been small. I'm running Tkinter. I have some elements on the screen (Labels, most importantly) which content has to be updated every iteration of the algorithm run, e.g. Iteration = [i] for i in range(n), n=100. I'm using the update_idletasks() command in the function itself after the variable.set(...) command. The variable type is IntVar(), and the mistake I'm getting is 'IntVar instance has no attribute 'update_idletasks'. No updates are displayed, of course. You have to call update_idletasks on a Tkinter *widget*, not a variable. You can call it on your window (Tk or Toplevel instance) or on your label for example. This way, it should work. Without the GUI the algorithm (it's a genetic algorithm) is working fine, but I need to make it available to other people via GUI cheers, Alex -- http://mail.python.org/mailman/listinfo/python-list
Re: update of elements in GUI
In MATLAB this command is drawnow, just in case On Aug 17, 9:49 pm, Jah_Alarm jah.al...@gmail.com wrote: thanks. The thing is, the objects actually get updated without this command, but when I run the GUI outside of python shell (i.e. in command prompt as python filename.py or compile it to .exe file) the objects do not get updated. I tried Label(mainframe,textvariable=var).grid(column=1,row=1).update_idletasks() and mainframe.update_idletasks() but it still doesn't work. On Aug 17, 7:19 pm, Eric Brunel eric.bru...@pragmadev.nospam.com wrote: In article 24dc97b3-a8b5-4638-9cf5-a397f1eae...@q16g2000prf.googlegroups.com, Jah_Alarm jah.al...@gmail.com wrote: hi, I've already asked this question but so far the progress has been small. I'm running Tkinter. I have some elements on the screen (Labels, most importantly) which content has to be updated every iteration of the algorithm run, e.g. Iteration = [i] for i in range(n), n=100. I'm using the update_idletasks() command in the function itself after the variable.set(...) command. The variable type is IntVar(), and the mistake I'm getting is 'IntVar instance has no attribute 'update_idletasks'. No updates are displayed, of course. You have to call update_idletasks on a Tkinter *widget*, not a variable. You can call it on your window (Tk or Toplevel instance) or on your label for example. This way, it should work. Without the GUI the algorithm (it's a genetic algorithm) is working fine, but I need to make it available to other people via GUI cheers, Alex -- http://mail.python.org/mailman/listinfo/python-list
Re: update of elements in GUI
(Top-post corrected; please don't do that, it makes messages very hard to read via usenet) In article 26c363c8-11d7-49b9-a1c1-251ab5ff9...@p22g2000pre.googlegroups.com, Jah_Alarm jah.al...@gmail.com wrote: On Aug 17, 7:19 pm, Eric Brunel eric.bru...@pragmadev.nospam.com wrote: You have to call update_idletasks on a Tkinter *widget*, not a variable. You can call it on your window (Tk or Toplevel instance) or on your label for example. This way, it should work. thanks. The thing is, the objects actually get updated without this command, but when I run the GUI outside of python shell (i.e. in command prompt as python filename.py or compile it to .exe file) the objects do not get updated. I tried Label(mainframe,textvariable=var).grid(column=1,row=1).update_idletasks() and mainframe.update_idletasks() but it still doesn't work. I think you're really misunderstanding something here: the call to update_idletasks is a one shot call to the GUI to basically tell it to refresh itself. So each time you change anything that should be displayed, you have to call that method again, or your changes will only be seen when the control returns to the GUI, which is basically at the end of your processing. The fact that it works when you're doing it interactively is normal. In this mode, you don't have a GUI event loop running, so the GUI updates itself all the time automatically. This is never true in programs you run the 'normal' way, i.e via: python filename.py And by the way, Label().grid().update_idletasks() had no chance to work anyway: the grid method doesn't return anything, so you're trying to call the update_idletasks method on None here HTH - Eric - -- http://mail.python.org/mailman/listinfo/python-list
Re: update of elements in GUI
On Aug 16, 9:07 pm, Jah_Alarm jah.al...@gmail.com wrote: hi, I've already asked this question but so far the progress has been small. I'm running Tkinter. I have some elements on the screen (Labels, most importantly) which content has to be updated every iteration of the algorithm run, e.g. Iteration = [i] for i in range(n), n=100. I'm using the update_idletasks() command in the function itself after the variable.set(...) command. The variable type is IntVar(), and the mistake I'm getting is 'IntVar instance has no attribute 'update_idletasks'. No updates are displayed, of course. Without the GUI the algorithm (it's a genetic algorithm) is working fine, but I need to make it available to other people via GUI cheers, Alex This program I had lying around and it will hopefully make things clearer. The integer under the second label (i.e. the 3rd label) increases by on every time you click the Print Contents button. The variable associated with the second label and the entry box update as you change the entry box's contents, all with no calls to update_idletasks(). class EntryTest: shows using the same StringVar in the second list box and in the entry box def __init__(self): self.top = Tkinter.Tk() self.top.title(Test of Entry) self.top.geometry(200x150+10+10) self.str_1 = Tkinter.StringVar() label_lit = Tkinter.StringVar() self.int_lit = Tkinter.IntVar() label_1 = Tkinter.Label(self.top, textvariable = label_lit ) label_1.pack() label_lit.set( Test of Label) label_2 = Tkinter.Label(self.top, textvariable = self.str_1 ) label_2.pack() label_3 = Tkinter.Label(self.top, textvariable = self.int_lit ) label_3.pack() self.int_lit.set(0) entry_1 = Tkinter.Entry(self.top, textvariable=self.str_1) entry_1.pack() self.str_1.set( Entry Initial Value ) print_button = Tkinter.Button(self.top, text='PRINT CONTENTS', command=self.getit, bg='blue', fg='white' ) print_button.pack(fill=Tkinter.X, expand=1) exit_button= Tkinter.Button(self.top, text='EXIT', command=self.top.quit, bg='red', fg='white' ) exit_button.pack(fill=Tkinter.X, expand=1) entry_1.focus_set() self.top.mainloop() ##- def getit(self) : print getit: variable passed =, self.str_1.get() x = self.int_lit.get() self.int_lit.set(x+1) ##=== if __main__ == __name__ : ET=EntryTest() print under __main__ =, ET.str_1.get() -- http://mail.python.org/mailman/listinfo/python-list
Re: update of elements in GUI
On Aug 16, 9:07 pm, Jah_Alarm jah.al...@gmail.com wrote: I have some elements on the screen (Labels, most importantly) which content has to be updated every iteration of the algorithm The variable type is IntVar() You would use int_var_name.set(some_number) -- http://mail.python.org/mailman/listinfo/python-list
