tkinter resize question

nickgeovanis at gmail.com nickgeovanis at gmail.com
Sat Jul 18 00:42:34 CEST 2015


On Friday, July 17, 2015 at 2:52:56 PM UTC-5, Russell Owen wrote:
> On 7/17/15 12:17 PM, nickgeovanis at gmail.com wrote:
> > On Friday, July 17, 2015 at 1:53:19 PM UTC-5, nickge... at gmail.com wrote:
> >> Resizing a tkinter window which contains a frame which contains a button widget, will not change the current size of the window, frame or button as recorded in their height and width attributes (at least not if they are resizable). What is the correct way to detect their current size?
> >
> > Ok, partially answering my own question:
> > The geometry of the window will change (win.geometry()), but the changes do not appear to "propagate" to the retrieved width/height of the child widgets, frames, etc. Or am I incorrect with this?
> 
> I'm not seeing it. If I try the following script I see that resizing the 
> widget does update frame.winfo_width() and winfo_height. (I also see 
> that the requested width and height are ignored; you can omit those).
> 
> -- Russell
> 
> 
> #!/usr/bin/env python
> import Tkinter
> root = Tkinter.Tk()
> 
> frame = Tkinter.Frame(root, width=100, height=50)
> frame.pack(expand=True, fill="both")
> def doReport(*args):
>      print "frame actual    width=%s, height=%s" % (frame.winfo_width(), 
> frame.winfo_height())
>      print "frame requested width=%s, height=%s" % 
> (frame.winfo_reqwidth(), frame.winfo_reqheight())
> button = Tkinter.Button(frame, text="Report", command=doReport)
> button.pack()
> 
> root.mainloop()

So my mistake was, rather than calling frame.winfo_height() or winfo_width() as you've done, instead checking frame["width"] and frame["height"]. Which retain their original values regardless of actual size AFAICS. If you do the same on the button, I think you'll find the same (non?)issue. 

I don't think I've seen the "winfo_optioname()" construct in the python-side doc. For example Sec 25.1.6.1 "Setting Options" in the tkinter chapter of the standard python Library Reference doesn't mention it or anything syntactically similar. I'm sure the usual disclaimer "see the tcl/tk docs" applies, but this seems more than a detail to me. Thanks for your help...Nick


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