Mailman 3 April 2004 - Tkinter-discuss

Inserting a unicode zero-width nonbreaking space into a Text widget, from Tkinter, on a Mac
by Kenneth McDonald Nov. 3, 2004

Nov. 3, 2004

As the subject says, I am attempting to insert a particular unicode character (\ufeff) into a Text widget, from Python. This is not quite working correctly, and I'm not sure if the problem is between Python and Tcl, or is a problem of OS X not properly knowing the character. This character is supposed to be a 0-width space, and using Python's unicodedata.name function confirms that feff is in fact the proper unicode sequence. The character is construction using a one-character python string: zws = u"\ufeff" And then passed to Text's insert command. Unfortunately, what shows up on screen is a complex (perhaps Chinese) asian ideograph. "Python in a Nutshell" indicates that all communication between Tkinter and Tk is in unicode, so I had hoped this would transfer correctly. Not sure if I need to do some conversion or not...could there be a conflict between a straight Unicode (16-bit) representation and a UTF-8 representation? Or do I need to do an OS setting to make sure the OS and the internal representation are on the same wavelength? Thanks, Ken

5 6

Widget collection project
by Michael Lange May 6, 2004

May 6, 2004

Hello everyone, a recent thread on comp.lang.python suggested to create a central place to collect Tkinter "mega" widgets people wrote; I thought that the Tkinter wiki might be a good place for that. My idea was that many people might have written widgets that are nice, but not "full-featured", so that it would be cool if you could simply add features by editing the source code on the wiki page (or maybe fix a bug); on the other hand you could just copy & paste the code into your application without having to download and install some package. Before I start with that I thought I'd ask what you folks think, is this really a good idea? Best regards Michael

2 1

Graying out and disabling widgets
by Chris Nethery April 30, 2004

April 30, 2004

Hello everyone. I have once again come up with an issue I cannot seem to resolve, although I would have thought it simple. I am trying to "gray out" and disable widgets when they lose focus. To that end, the code works. The problem is...it takes two mouse clicks on the widget to facilitate the method. To illustrate this, type anything in the entry field and hit enter...so far, so good...now select an item from the combobox...that enables the combobox but does not populate the combobox's entry with the item--the item must be selected a second time in order for this to happen. I have included the code for your perusal... Any ideas? Thanking you in advance, Chris Nethery ############################################ from Tkinter import * import Pmw root = Tk() root.title('Graying out and disabling') #root.wm_geometry("1015x705") Pmw.initialise(root) class GrayOutAndDisableMethod: def __init__(self, root): Frame1 = Frame(root, borderwidth=2, width=1015, height=705) Frame1.pack(fill='both', expand=1, padx=5, pady=5) Frame1.place(relx=0.01, rely=0.01, anchor=NW) Frame2 = Frame(Frame1, borderwidth=2, width=300, height=18) self.ConstantEntryField = Pmw.EntryField(Frame2, labelpos=W, labelmargin=30, label_text='1) Input stuff:', command = self.constantValue) self.ConstantEntryField.pack(fill=X, expand=1, padx=5, pady=5) Frame2.pack(fill='both', expand=1, padx=5, pady=5) Frame2.place(relx=0.01, rely=0.08, anchor=NW) Frame3 = Frame(Frame1, borderwidth=2, width=300, height=18) MapComboItems = ('', 'item1', 'item2', 'item3', 'item4', 'item5', 'item6', 'item7', 'item8', 'item9', 'item10') self.MapComboBox = Pmw.ComboBox(Frame3, history=0, listheight=150, label_text='2) Select stuff:', labelmargin=24, labelpos='w', selectioncommand=self.mapSelection, scrolledlist_items=MapComboItems) self.MapComboBox.pack(side='right', anchor='w', fill='x', expand=1, padx=5, pady=5) Frame3.pack(fill='both', expand=1, padx=5, pady=5) Frame3.place(relx=0.01, rely=0.14, anchor=NW) def constantValue(self): if self.ConstantEntryField.get() == '' or None: self.ConstantEntryField.component('entry').config(state='normal') self.MapComboBox.component('entry').config(state='normal') self.MapComboBox.component('listbox').config(state='normal') else: self.ConstantEntryField.component('entry').config(state='normal') self.MapComboBox.component('entry').config(state='disabled') self.MapComboBox.component('listbox').config(state='disabled') def mapSelection(self, event): if self.MapComboBox.get() != '' or None: self.MapComboBox.component('entry').config(state='normal') self.MapComboBox.component('listbox').config(state='normal') self.ConstantEntryField.clear() self.ConstantEntryField.component('entry').config(state='disabled') else: self.MapComboBox.component('entry').config(state='normal') self.MapComboBox.component('listbox').config(state='normal') self.ConstantEntryField.component('entry').config(state='normal') nbn = GrayOutAndDisableMethod(root) root.mainloop() ###############################################

1 0

Re: Re: Graphing package for Tkinter? (Fredrik Lundh)
by Kenneth McDonald April 22, 2004

April 22, 2004

Fred, I did download and install wck and wckgraph. I'd love to play with wck, it looks really nice! Too many toys, too little time, hopefully in the next month or so... If you have need/use for a "semi-batch-driven" Python graphing facility (with Tk as an optional backend for viewing and simple manipulation), check out matplotlib.sourceforge.net. Very nice output, quite a bit of capability, though the Python OO API is a little clunky at the moment (but the project is aware of that, and working on it.) Posted to the mailing list in case others might be interested in matplotlib. Thanks, Ken

1 0

Re: Graphing package for Tkinter?
by Kenneth McDonald April 21, 2004

April 21, 2004

On Apr 16, 2004, at 11:04 AM, tkinter-discuss-request(a)python.org wrote: >> Given that there is no evidence that BLT's graph widget will be >> available on Mac OS X anytime soon (I might have a shot, but >> doubt I could do it), could anyone recommend a nice graphing >> widget that wraps a Canvas in a Python library? > > what specific requirements do you have? > > - graph types > - is print support required? > - mac only, or other platforms required? > - can you build C extensions for your target platform(s), or > do you need a pure Python extension? (or ready-made > packages for all platforms) As it turns out, some kind soul sent me a BLT package hacked so that the graph works under OS X. However, this is an interesting enough topic to me that I'm still curious as to what other options might exist. Fred put up a good list of questions, so here are the answers: 1) My main need is to support i) both log and linear scales, ii) overlaying multiple graphs (i.e. with potentially different y-axes). Of course, I need standard things such as being able to label axes, etc., but not much else in the way of special needs. 2) Print support is always nice, but is not required. 3) Crossplatform support (or at least potential) is highly desirable. 4) C extensions are fine. If an extension has a decent set of makefiles, I can generally get it to compile, but not always--I still have no idea if Qt and PyKDE are actually correctly installed on my system or not :-) Thanks, Ken

2 2

Automagically calling functions
by Batista, Facundo April 21, 2004

April 21, 2004

I'm using Radiobutton: rb_var = IntVar() Radiobutton(master, text="foo", variable=rb_var, value=1, command=function1) Radiobutton(master, text="bar", variable=rb_var, value=2, command=function2) So, the user chooses whatever he/she wants and Radiobutton automatically calls the corresponding function. But then, when creating the dialog again, I read the config and want to put the Radiobutton in the same state the user left it. So, I do: rb_var.set(previous_state) The issue is that this last step don't automatically call the corresponding function. I want Radiobutton to trigger function1 if I do rb_var.set(1), for exmaple. There's a way? Thank you! . Facundo

1 0

Python GUI wrapper for a long operation
by Oleg A. Paraschenko April 21, 2004

April 21, 2004

Hello, maybe of some interest: A complete Python Tkinter sample application for a long operation http://uucode.com/texts/pylongopgui/pyguiapp.html A complete Python Tkinter application demonstrates one of the ways to implement a GUI wrapper for a long operation. The long operation works in a separated thread without frozing a GUI. A progress bar visializes a progress in calculations. A notification widget displays log messages. User can cancel the operation. Log messages are stored in a viewable history buffer. Please beware that documentation describes how things are done, but does not explain why. It is so because some advanceed knowledge is assumed: * threads, * master-view-controller pattern (it is partially used in the code), * logging in a log4j style. Regards, Oleg

1 0

RE: [Tkinter-discuss] Listbox selection issue
by Batista, Facundo April 20, 2004

April 20, 2004

#- I can hardly believe that, I wrote a little test app and #- double clicking works fine here: #- #- ###########file test.py############################################ #- #!/usr/bin/env python #- from Tkinter import * #- #- class Test(Tk): #- def __init__(self): #- Tk.__init__(self) #- l = Listbox(self) #- l.pack() #- l.insert('end', 'line 1') #- l.insert('end', 'line 2') #- l.insert('end', 'line 3') #- l.bind('<1>', self.dummy) #- l.bind('<Double-Button-1>', self.test) #- #- def dummy(self, event): #- return 'break' #- #- def test(self, event): #- print 'hello' #- #- if __name__ == '__main__': #- t = Test() #- t.mainloop() #- #- ############################################################# #- ######### #- #- At least on my box (Python2.2/Tk8.3) the listbox behaves #- just like I expected. #- What does the function you bound to #- '<Double-Button-1>'-events look like, maybe this #- one is the problem here? The issue here is that when you click in an item, it does not get colored (or remarked, or selected, or however it says). Why that happens? . Facundo

3 3

RE: [Tkinter-discuss] Listbox selection issue
by Batista, Facundo April 17, 2004

April 17, 2004

#- #- ... #- self.listbox.bind("<Button-1>", self.noIr) #- ... #- #- def noIr(self, evento): #- '''Dummy function to stop a mouse-click from selecting #- a listbox item.''' #- return "break" #- #- I hope this helps No. Was told about this out-of-list. The issue is this ways neither works double-click. . Facundo

2 1

ANN: updated reference pages
by Fredrik Lundh April 16, 2004

April 16, 2004

Just fyi, I've updated the reference pages in the effbot.org draft edition of my "an introduction to tkinter". This includes documentation for the new Spinbox, LabelFrame and PanedWindow widgets. http://effbot.org/zone/tkinter-toc.htm (under "class references") </F>

1 0