Mailman 3 January 2019 - Tkinter-discuss

Anaconda
by bob Jan. 23, 2019

Jan. 23, 2019

I have Anaconda 3 with Python 2 and 3 environments on a MacBook running High Sierra. One section of a program creates rectangles on a canvas (plotting GPS data points). Binding <Button-1> to a rectangle works fine (displays info about the point when clicked), but binding to <Button-3> doesn't work (it should "zap" the point out of the list and redraw the plot). The function for zapping never gets called, and there's no errors in the Terminal/xterm. It doesn't work with the Python 2 or 3 environment. Tcl/Tk versions are 8.6/8.6 in both environments. Shift-clicking, control-clicking, shift-control-clicking on the canvas or created items seems fine. Just this <Button-3> deal doesn't. The same code runs fine in an Anaconda Python 3 environment in CentOS (using VMWare). A Python package we make for our programs on the Mac (and one for Linux) with Python 2.7.9 Tcl/Tk 8.6/8.6 which starts XQuartz on a Mac when we start a Tkinter program is fine (it's what some are trying to replace with this whole Anaconda stuff). Python 3 on Win10 works fine. There is some old chatter about anaconda/conda Tkinter not being great on Macs on the net, but I've never seen a solution to get Anaconda to use a different Tcl/Tk library. The Anaconda Tkinter looks like junk. Apple's Tcl/Tk/Tkinter has never worked/looked well. Anyone seen this <Button-3> business? Any ideas? Thanks! Bob

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ttk.Label unicode characters
by Ben Jan. 21, 2019

Jan. 21, 2019

Hi, Is there any way to make a Label display every Unicode character, or are we just stuck until Tcl/Tk fully supports all of unicode? Here's my example code: import tkinter as tk from tkinter import ttk root = tk.Tk() ttk.Label(root, text='Test \U0001d306 String').grid(row=0, column=0) root.mainloop() And the exception: _tkinter.TclError: character U+1d306 is above the range (U+0000-U+FFFF) allowed by Tcl System: Linux, Python 3.6.7, Tk 8.6 Is there anything I can do to be able to display that character? Thanks for any pointers. -Ben

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Scrollbar for thumbnails
by Mario St-Gelais Jan. 11, 2019

Jan. 11, 2019

I am having a terrible time wrapping this under my head. What is missing here to have the scrollbar working. Everything is displayed fine. But the slider of the scrollbar is full length. i.e. same height as outerframe. which is same size as the canvas. def setup(self): c = 0 r = 0 outer_frame = Frame(self, bg='red', padx=2, pady=2) outer_frame.pack() scrollbar = Scrollbar(outer_frame) scrollbar.pack( side = RIGHT, fill=Y ) canvas = Canvas(outer_frame, height=100, scrollregion=(0,0,300,300), yscrollcommand=scrollbar.set) canvas.pack(side=LEFT, expand=YES, fill=BOTH) scrollbar.config(command=canvas.yview) for f in os.listdir(self.thumbnail_folder): fpath = os.path.join(self.thumbnail_folder, f) photo = PhotoImage(file=fpath) photo_frame = Frame(canvas, bg='white', padx=2, pady=2) lbl_photo = Label(photo_frame, image=photo, text=f) lbl_photo.bind("<ButtonRelease-1>",self.photo_click) lbl_photo.image=photo lbl_photo.pack() lbl_name = Label(photo_frame, text=f.split('.')[0]) lbl_name.bind("<ButtonRelease-1>",self.photo_click) lbl_name.pack() photo_frame.grid(row=r, column=c) if c > 2: c = 0 r = r + 1 else: c = c + 1 Regards Mario St-Gelais

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how do I pass variables when binding to a widget?
by Chris Roy-Smith Jan. 10, 2019

Jan. 10, 2019

Hi System: Linux, Python Version: 3.6.7 I am trying to learn how to bind to a widget, and process the contents of the bound widget here is my attempt at code: #! /usr/bin/python3 from tkinter import * import datetime def NewAge(start): print(start) futureAge = start + 5 calculated.delete(0,END) calculated.insert(0,futureAge) master=Tk() Label(master, text='present age').grid(row=0, column=0) Label(master, text='age in 5 years').grid(row=1, column=0) first=Entry(master) first.grid(row=0, column=1) calculated = Entry(master) calculated.grid(row=1, column=1) first.bind("<Return>", NewAge(first.get())) Button(master, text='exit', command=master.destroy).grid(row=3, column=0) master.mainloop() I get the following traceback: Traceback (most recent call last): File "./bind.py", line 19, in <module> first.bind("<Return>", NewAge(first.get())) File "./bind.py", line 7, in NewAge futureAge = start + 5 TypeError: must be str, not int All hints & help greatly appreciated. regards, Chris Roy-Smith

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