Mailman 3 January 2009 - Tkinter-discuss

Possibly n00bish question about ImageTk
by Barnesdesdes Feb. 10, 2009

Feb. 10, 2009

I've been trying to make a program which will import a png file and display it inside a frame. It actually works when I just run the code, but if I try to abstract the exact same code into a function, it fails. In the code below, if I just run it, it works. However, if I comment out the lines between "root=Tkinter.Tk()" and "moo(root)" and comment in "moo(root)", it no longer works. Instead of displaying the image, it just displays a gray frame of the correct size. Does anyone have any insights about what I'm doing wrong? import Image, ImageTk, Tkinter def moo(master): img = Image.open('plotfig.png') f = Tkinter.Frame(master, width=800, height=600) pi = ImageTk.PhotoImage(img) t = Tkinter.Label(f, image=pi) f.pack() t.place(x=0, y=0, width=800, height=600) t.pack() root = Tkinter.Tk() img = Image.open('plotfig.png') f = Tkinter.Frame(root, width=800, height=600) pi = ImageTk.PhotoImage(img) t = Tkinter.Label(f, image=pi) f.pack() t.place(x=0, y=0, width=800, height=600) t.pack() #moo(root) root.mainloop() Thanks very much. Alan -- View this message in context: http://www.nabble.com/Possibly-n00bish-question-about-ImageTk-tf3990201.htm… Sent from the Python - tkinter-discuss mailing list archive at Nabble.com.

3 2

Running system calls through TKinter
by AbsoluteMatt Jan. 31, 2009

Jan. 31, 2009

Hi All, I have been writing a little app in python/tkinter to allow non technical users at my office setup/restore manipulate Oracle databases. I am using cx_Oracle plugin as well. The app works fine at the moment, doing everything I want it to. However when it comes to importing a db I am just using imp.exe and dpimp.exe basically making external system calls to run it. I know this is not ideal and I should probably be using popen etc, but I am not to sure on how to get it working. I tried a while ago and it broke more than it fixed so I paniced and went back to good old command prompt method. I want to be able to view the output of an oracle import in realtime, anyone that has seen imp/exp knows that when running on command line you can see the tables importing as they import line by line. Ideally I would like to have a "process" tab on my tkinter app rather than a seperate DOS prompt running the command, where you can see this execution. I cant remember exactly what I tried before, but I think it involved using popen and stdout and then printing stdout. However when I did it like this it used to print out output in bulk blocks not nicely one line at a time. So.... Is there anyway to embed a command window inside a tkinter window, or does anyone know a way of outputting system calls in to a tkinter window in realtime, one line at a time. I think I have explained my problem really badly, so sorry. I have searched online and all I seem to get is the same use popen. Maybe I don't understand the popen stuff well enough, but its time for another shot. This little DOS prompt by the side of my app is getting on my nerves. Any Suggestions?, Im lost! Many Thanks, Matt -- View this message in context: http://www.nabble.com/Running-system-calls-through-TKinter-tp21747662p21747… Sent from the Python - tkinter-discuss mailing list archive at Nabble.com.

2 3

Re: [Tkinter-discuss] How to set a constant in lambda
by david.giesen＠kodak.com Jan. 29, 2009

Jan. 29, 2009

With lambda, you need to set the value of the variable at the time the lambda is created, or else the variable is grabbed from the environment at the time the lambda runs. You can do this by using the variable as a default argument. In your case, change: XT.append(Button(T,text="Viola:New Tab",command=lambda:switch_tabs(whoopsie)) to XT.append(Button(T,text="Viola:New Tab",command=lambda x=Whoopsie:switch_tabs(x)) ought to do it. Dave David J. Giesen | Research Scientist | FPEG US Display OLED Materials R+D | Eastman Kodak Company | 2/83/KRL MC02216 | Rochester, NY 14650 | david.giesen(a)kodak.com | 1-585-588-0480 Office | www.kodak.com > From: vtcodger <donaldkenney(a)gmail.com> > > I came across a problem that probably has a simple, clever, answer -- but it > is eluding me. I was trying to create a set of tab buttons on a Tkinter > page using Buttons. These are created dynamically when the user loads a > file. I don't know in advance how many files will get opened, so I want to > have a variable number of tabs. > > So we have a Frame T; and an array of tabs XT[]; and a function > switch_tabs(n) that will handle the details of switching the data base, > titles, etc. I compute the tab number: > > Whoopsie = len(XT) > > And I create a new Button: > > XT.append(Button(T,text="Viola:New Tab",command=lambda: > switch_tabs(whoopsie)) > > It all works fine except for this one minor detail. Whoopsie can't be a > constant because I don't know in advance what constant to use. And if > whoopsie is a variable, it apparently is evaluated at execution time, and > will have the then current value of whoopsie, not the value I wanted to set > at creation time. I tried everything I could think of including > copy.copy(whoopsie) to get a constant set so that switch_tabs could know > which tab to switch to. > > Couldn't do it. I was starting to look at tracing back through stack frames > when it came to me that RadioButtons unlike generic Buttons have a > variable-value attribute pair that behaves as I desire. So this > manifestation of the problem is worked around. But I expect that I'll see > this problem again in some other guise. > > Am I missing something? Probably something simple? What? > --

2 2

event_generate question
by Allen Taylor Jan. 29, 2009

Jan. 29, 2009

I'm trying to generate some events in Tkinter but it doesn't seem to be working the way I expected. Here's an example of what I'm trying to do... def click(): print 'click' from Tkinter import * top=Tk() b=Button(top, text='Hit me', command=click) b.event_generate('<Button-1>', x=0, y=0) b.event_generate('<ButtonRelease-1>', x=0, y=0) The appearance of the button changes after the <Button-1> event (to depressed), and again after the <ButtonRelease-1> event (to normal again), but the associated button command (the click function) is not called. If I bind a function for the event to the button using the bind method, it gets called, but I really need the associated command to get called too. Also, I tried doing this with a Pmw.ScrolledListBox with an associated dblclickcommand, so I tried to generate <Double-Button-1> and <Double-ButtonRelease-1> events, but to my surprise, I received the following error message for both cases: _tkinter.TclError: Double or Triple modifier not allowed These problems are getting in the way of my attempt to automate GUI testing with Tk. Am I missing something? (Ok, I really don't need the first case, because I can simple call the button's invoke method. But in the second case, the associated action is only invoked via the double click action.) Allen B. Taylor MDA 9445 Airport Road Brampton, ON L6S 4J3 905-790-2800 ext. 4350 allen.taylor(a)mdacorporation.com

2 3

ANN: Ttk wrapper 0.3
by Guilherme Polo Jan. 28, 2009

Jan. 28, 2009

Hello, pyttk 0.3 has just been released! It is available at http://pypi.python.org/pypi/pyttk/0.3 This release was supposed to have happened several weeks ago but I ended up delaying it a lot, but well, finally it is here. This one includes bug fixes, backward incompatible changes, improvements and what not. Nothing really radical, but the changes are there. For a full complete list of changes be sure to read http://gpolo.ath.cx:81/posts/pyttk-03-released/ (if I haven't forgotten anything). What is this wrapper for ? -------------------------------- This wrapper provides classes to allow using the Tk themed widget set, which has been included in Tk 8.5 but can be used with earlier versions if you have Tile installed. Ttk is based on a revised and enhanced version of TIP #48 (http://tip.tcl.tk/48) specified style engine. What is Ttk ? ---------------- The basic idea of ttk is to separate, to the extent possible, the code implementing a widget's behavior from the code implementing its appearance. Widget class bindings are primarily responsible for maintaining the widget state and invoking callbacks, all aspects of the widgets appearance lies at Themes. More informations ----------------------- http://gpolo.ath.cx:81/projects/pyttk/ http://gpolo.ath.cx:81/posts/pyttk-03-released/ Thanks everyone who have been using and supporting the module, -- -- Guilherme H. Polo Goncalves

1 0

How to set a constant in lambda
by vtcodger Jan. 27, 2009

Jan. 27, 2009

I came across a problem that probably has a simple, clever, answer -- but it is eluding me. I was trying to create a set of tab buttons on a Tkinter page using Buttons. These are created dynamically when the user loads a file. I don't know in advance how many files will get opened, so I want to have a variable number of tabs. So we have a Frame T; and an array of tabs XT[]; and a function switch_tabs(n) that will handle the details of switching the data base, titles, etc. I compute the tab number: Whoopsie = len(XT) And I create a new Button: XT.append(Button(T,text="Viola:New Tab",command=lambda: switch_tabs(whoopsie)) It all works fine except for this one minor detail. Whoopsie can't be a constant because I don't know in advance what constant to use. And if whoopsie is a variable, it apparently is evaluated at execution time, and will have the then current value of whoopsie, not the value I wanted to set at creation time. I tried everything I could think of including copy.copy(whoopsie) to get a constant set so that switch_tabs could know which tab to switch to. Couldn't do it. I was starting to look at tracing back through stack frames when it came to me that RadioButtons unlike generic Buttons have a variable-value attribute pair that behaves as I desire. So this manifestation of the problem is worked around. But I expect that I'll see this problem again in some other guise. Am I missing something? Probably something simple? What? -- View this message in context: http://www.nabble.com/How-to-set-a-constant-in-lambda-tp21689312p21689312.h… Sent from the Python - tkinter-discuss mailing list archive at Nabble.com.

2 1

Basic Tkinter help
by Ru-D Jan. 22, 2009

Jan. 22, 2009

I am relatively new to Tkinter and am finding some simple problems difficult to understand/rectify The following code displays two windows; my maximised application window and a small window called Tk: from Tkinter import * class APP(Toplevel): def __init__(self, master): Toplevel.__init__(self, master) self.master = master root = Tk() app = APP(root) app.state("zoomed") app.title("Title") root.mainloop() I can fix this by inserting the line root.withdraw() after root = Tk() but this seems like a clumsy solution to me. Could someone please help me understand why two windows are being made and suggest a better way to do this. Thanks, Ru-D -- View this message in context: http://www.nabble.com/Basic-Tkinter-help-tp21593746p21593746.html Sent from the Python - tkinter-discuss mailing list archive at Nabble.com.

2 1

Basic Tkinter help
by Ru-D Jan. 22, 2009

Jan. 22, 2009

I am relatively new to Tkinter and am finding some simple problems difficult to understand/rectify The following code displays two windows; my maximised application window and a small window called Tk: from Tkinter import * class APP(Toplevel): def __init__(self, master): Toplevel.__init__(self, master) self.master = master root = Tk() app = APP(root) app.state("zoomed") app.title("Title") root.mainloop() I can fix this by inserting the line root.withdraw() after root = Tk() but this seems like a clumsy solution to me. Could someone please help me understand why two windows are being made and suggest a better way to do this. Thanks, Ru-D -- View this message in context: http://www.nabble.com/Basic-Tkinter-help-tp21593741p21593741.html Sent from the Python - tkinter-discuss mailing list archive at Nabble.com.

1 0

Basic Tkinter help
by Ru-D Jan. 22, 2009

Jan. 22, 2009

I am relatively new to Tkinter and am finding some simple problems difficult to understand/rectify The following code displays two windows; my maximised application window and a small window called Tk: from Tkinter import * class APP(Toplevel): def __init__(self, master): Toplevel.__init__(self, master) self.master = master root = Tk() app = APP(root) app.state("zoomed") app.title("Title") root.mainloop() I can fix this by inserting the line root.withdraw() after root = Tk() but this seems like a clumsy solution to me. Could someone please help me understand why two windows are being made Ru-D -- View this message in context: http://www.nabble.com/Basic-Tkinter-help-tp21593735p21593735.html Sent from the Python - tkinter-discuss mailing list archive at Nabble.com.

1 0

tkinter wiki migrated to a new machine
by Jeff Epler Jan. 17, 2009

Jan. 17, 2009

.. and a newer version of moin. please let me know if you discover any problems. thanks, Jeff

2 1