Mailman 3 January 2013 - Tkinter-discuss

Control position of Tkinter common dialogs?
by python＠bdurham.com Dec. 9, 2016

Dec. 9, 2016

Python 2.7 under Windows: How can we control the position of Tkinter's common dialogs? Here's what we've discovered: * Certain common dialogs always open up relative to their parent window * Certain common dialogs always open up centered on the user's desktop * All common dialogs appear to ignore the optional parent= parameter Questions: * How can we force a dialog to open up relative to its parent window? * How can we force a dialog to open up centered on the user's desktop? Background: import tkColorChooser as colorchooser import tkFileDialog as filedialog import tkMessageBox as messagebox # always open up relative to parent windows fileOpen = filedialog.askopenfilename() fileOpens = filedialog.askopenfilenames() fileSaveAs = filedialog.asksaveasfilename() color = colorchooser.askcolor() # always open up centered on desktop folderOpen = filedialog.askdirectory() messagebox.askquestion() Malcolm

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Entry Labels - .get()
by Blackpanda Feb. 1, 2013

Feb. 1, 2013

Hi, I'm relatively new to Python and am building a GUI using Tkinter. As part of the GUI I have a form ("frm2") which has a number of enrty labels ("self.ent"). These are placed in the form using a double loop (see below). I also have a button which I want to return all the entries. The button is linked (i.e. using command=self.GetValues) to a function which uses self.entVar.get() to try and get all the entries but this only gives me the last entry. Any suggestions how I can get all the entries when the button is pressed? frm2 = LabelFrame(cnv, text="Portfolio Weights:", font=("Calibri", 12), width=150) #Frame contents for i in range(0, len(Assets_Text)): labi = Label(frm2, width=30, text=Assets_Text[i], anchor='w') labi.grid(row=i+5, column=0, sticky='we') for j in range(0, self.entry2Variable.get()): lab2 = Label(frm2, text="Portfolio %d" % (j+1), width=10, font=("Calibri", 10)) lab2.grid(row=4, column=j+1) self.entVar = IntVar() self.ent = Entry(frm2, width=10, textvariable=self.entVar) self.ent.grid(row=i+5, column=j+1) self.entVar.set(0.00) -- View this message in context: http://python.6.n6.nabble.com/Entry-Labels-get-tp5004179.html Sent from the Python - tkinter-discuss mailing list archive at Nabble.com.

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Tkinter (python 3) and Sql-Alchemy
by Russell Adams Jan. 29, 2013

Jan. 29, 2013

I've hit a wall trying to make a fairly simple tkinter form oriented application using SQL-Alchemy in keeping the tkinter widgets and the sql-alchemy objects in synchronization. Google searches haven't provided any benefit, so I turn to the mailing list. Does anyone have any code samples, best practices, or could recommend other open source programs that use tkinter and sql-alchemy that correctly demonstrate how to work with the pair? The issues I've been having are typically due to implicit string conversions, input validation, converting strings back to the sql data type (date, datetime, boolean, integer, decimal.decimal), and synchronizing updates to the screen vs updates to the sql-a object. I've tried a few methods now, including using Variables (ie: IntVar, StringVar, etc), tracing those variables, and now I'm working through creating a class which would inherit from Variable but perform the type conversions. Oddly enough session management has been a breeze. Code is at: https://code.launchpad.net/~rladams/+junk/TERT Thanks. ------------------------------------------------------------------ Russell Adams RLAdams(a)AdamsInfoServ.com PGP Key ID: 0x1160DCB3 http://www.adamsinfoserv.com/ Fingerprint: 1723 D8CA 4280 1EC9 557F 66E8 1154 E018 1160 DCB3

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StringVar fails to honor None
by Russell Adams Jan. 18, 2013

Jan. 18, 2013

Found this while reverting a data entry form to database values (ie: Undo), all my fields became "None". Set changes None to a string, creating with value= doesn't. Seems inconsistent, is this intentional or to be expected? -- #!/usr/bin/env python3 from tkinter import * from tkinter import ttk import tkinter.font as tkFont root = Tk() print("Creating a stringvar") derp=StringVar(value=None) print("Derp was created with value of None, it's value is '{}'.".format(derp.get())) print("Now setting derp to None again") derp.set(None) print("Derp was set to None, it's value is '{}'.".format(derp.get())) assert derp.get() == '' ------------------------------------------------------------------ Russell Adams RLAdams(a)AdamsInfoServ.com PGP Key ID: 0x1160DCB3 http://www.adamsinfoserv.com/ Fingerprint: 1723 D8CA 4280 1EC9 557F 66E8 1154 E018 1160 DCB3

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itemcget question
by GKalman Jan. 13, 2013

Jan. 13, 2013

In the short sample code below I have two print statements, each of which contains *"itemcget()" * The first print statement works OK. It accesses the "fill" option and returns "red" The second print statements generates an error-message. My intent is to print (or in general access) one of the coordinates of the oval (in this example, designated as x1). *In general my question is:* How to access the coordinates in a *canvas. create_oval(x1,y1,x2,y2, options...*) statement? #==================== SAMPLE CODE ==================================== from Tkinter import * class Appr: def __init__(self,root): self.c = Canvas(root, width=500, height=500) self.c.pack(fill=BOTH, expand=YES) x1=10 self.oval=self.c.create_oval(x1,10,20,20,fill="red",tags='red') self.c.tag_bind('red', '<Button-1>', self.startDoIt) def startDoIt(self,event): widget = event.widget self.startx, self.starty = widget.winfo_pointerxy() print widget.itemcget(self.oval,"fill") print widget.itemcget(self.oval, x1) raw_input() #=========== MAIN ==== root=Tk() app=Ap(root) root.mainloop() -- View this message in context: http://python.6.n6.nabble.com/itemcget-question-tp5002250.html Sent from the Python - tkinter-discuss mailing list archive at Nabble.com.

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TkInter won't update display on OS X if delay is too small
by Leon Maurer Jan. 12, 2013

Jan. 12, 2013

Howdy, I'm running in to a problem where TkInter won't update the interface on OS X. I've filed a bug (http://bugs.python.org/issue16941), but it was suggested that I also send the message here, in case you have some thoughts about what to do -- either a fix or a workaround. Here's a small piece of code which has the problem: https://mywebspace.wisc.edu/lnmaurer/web/updatebug/bugtest.py The program is simple -- basically a big canvas with a some text in the middle that counts up. Here's a short quick-time movie showing the problem with that code: https://mywebspace.wisc.edu/lnmaurer/web/updatebug/updatebug.mov The screen-cast has three parts. First, it shows the program working as it should. Then, I add a simple background image to the canvas (a black rectangle), and the interface refuses to refresh at all; I get a spinning beach ball wheel (although the cursor appears as the usual black arrow in the screen-cast). Finally I increase the delay between updates, and the interface again refreshes as it should. The middle case, where the interface becomes totally unresponsive, is a bug. I haven't been able to reproduce this problem under Linux or Windows; I've only run in to it on OS X. Also, the size of the canvas and image matters; if I make them small enough, the interface won't freeze up. I first ran in to this problem on a more complicated program with a more complex interface http://lnmaurer.github.com/Interference-Inference-Interface/ so -- if you can't reproduce the problem with the simple code -- you may be able to reproduce it with that more complex code. Computer and software information: OS X 10.6.8 Python 2.7.3 ActiveTcl 8.5.13 PIL 1.1.7 MacBookPro5,5 w/ 2.26GHz Core 2 Duo (So it's a machine that's kind of slow by today's standards. Maybe faster machines won't run in to this problem, but this machine doesn't have the problem when running Windows or Linux.) Thanks. -Leon

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No menu displayed.
by François laforgia Jan. 10, 2013

Jan. 10, 2013

Hi all, I'm a beginner in Tkinter development and I have a problem w/ the menus under Mac OS. I would like to build a GUI w/ menus but when I run the program on MAC OS Lion everything is ok but no menus are displayed in my window. I tried to run the same program w/ the same Python version on a Ubuntu 12.04 and this time the menus are correctly displayed. I also noticed that IDLE doesn't display the menus either. I'm not stuck as I can continue to code on my Linux but at the end this program will have to run mainly on Mac OS and at this time I can't provide it as it is. I had a look at the known issue on the Python website but nothing seems related to this problem. It is also possible I do something wrong but I can't find what. Please can you help me to troubleshoot this issue ? My configuration is the following: Mac Book Pro 2.4GHz Core i5 / 4GB RAM Mac OS X 10.7.5 Python 2.7.3 (the one provided w/ Mac OS) I believe TK is ver. 8.5 but I don't know how to verify it. I attached to this email the test case I used to confirm the issue. Best regards, Francois.

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tkinter wiki (temporarily) offline
by Jeff Epler Jan. 10, 2013

Jan. 10, 2013

I read today that the python.org wiki (running an unspecified version of moinmoin) was compromised in December http://pyfound.blogspot.com/2013/01/wikipythonorg-compromised.html As a result, I am disabling the tkinter wiki temporarily while I investigate how to obtain a fixed version for Ubuntu 10.04 LTS. I apologize for the inconvenience. Jeff

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