Mailman 3 May 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

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Switching focus between different application
by corrado clementi May 31, 2004

May 31, 2004

Hello I've two python applications running on a Windows system (either Win2000 or WinXp); they both use Tkinter as graphical toolkit. I need to switch the focus between the two, but I'm not able to find a way; I've tried all the focus_force, grab_set, .. but they all seem to work only inside a single application. Is there any way to force the focus to a single application? Or something like the Alt-Tab to move the focus to the desired application? I've tried trapping the WM_TAKE_FOCUS protocol, but it does not seem to be implemented under Windows. I also tried trapping the keyboard event from one application and send it to the other, using then an event_generate, but it looks like without the focus the event is not generated. Any suggestion is welcome. Corrado Clementi

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problem loading images
by leon May 31, 2004

May 31, 2004

On a debian unstable with python2.3 and python2.3-imaging-tk 1.1.4-3, python2.3-tk 2.3.4-1 I get this behaviour... >>> from Tkinter import * >>> from PIL import Image, ImageTk >>> img = Image.open('image.gif') >>> root = Tk() >>> button2 = Button(root, image=img) Traceback (most recent call last): File "<stdin>", line 1, in ? File "/usr/lib/python2.3/lib-tk/Tkinter.py", line 1906, in __init__ Widget.__init__(self, master, 'button', cnf, kw) File "/usr/lib/python2.3/lib-tk/Tkinter.py", line 1835, in __init__ self.tk.call( _tkinter.TclError: image "<PIL.JpegImagePlugin.JpegImageFile instance at 0x40f2998c>" doesn't exist >>> img <PIL.JpegImagePlugin.JpegImageFile instance at 0x40f2998c> it seems there is an istance, but it can't be seen by tk.call(). ?? quite confused about this. any ideas? leon. -- www.lilik.it/users/leonardo 0C5F B8DE 3136 1506 96D0 1806 7674 D513 A66E 7854

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Tkinter under SMP
by Douglas S. Blank May 26, 2004

May 26, 2004

Hello tkinter-discuss, I'm new to this list, but have a question: I seem to have a lot of problems running tkinter under a particular Linux (RedHat 9), PC computer, which happens to have two processors. Could this be the problem? The problem specifically is that I get very strange Tk errors, like: attempt to apply int(): None but every time it is a different error. I never have any problems (like these) on any other (non-SMP) machine. If this is a problem, is there a known work-around, or plans to fix it? Thanks! -Doug

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Removing widgets
by Roland Hedberg May 25, 2004

May 25, 2004

Hi! I'm a complete newbie on tkinter so I can only hope that this is the right forum for this question. Anyway, I have the following problem: In one part of my main window ( the local definition part), I want to insert labels and entry window pairs. Which labels are printed are dependent on which entry that has been choosen in a listbox in another part of the main window. The pairs are added to a frame that are packed into the main frame. The snippet that does the pairs looks like this: i = 0 for lab in labels: l = Label(local, text=lab+":") l.grid(row=i) self.lab.append(l) e = Entry(local) e.grid(row=i, column=1) self.ent.append(e) i += 1 If another entry from the list is choosen then the labels and accompaning entry windows should change. Noticable is that the number of label/entry pairs differs between different choices in the listbox and that the length of the labels also varies. So what I want to do is to clear the local definition frame of the main window when a new listentry are choosen and then write the new pairs. Preferrably without having the frame size change, but that is secondary at present. My problem is that I am unable to 'clear' the frame, I can't get rid of the labels I once have written (or the entries for that matter). I can overwrite them but that only 'works' if all the labels are of the same length which they aren't. I've tried to use destroy and forget but to no avail. Anyone who knows how to do this ? -- Roland

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Pmw, Blt and graphs
by corrado clementi May 18, 2004

May 18, 2004

Hello I'm using Pmw.Blt to create some financial graph; I would like to use two different colors in the plot area, below the line and over the line. I know how to set the background color but I haven't found out a way to perform the above task. Can anyone help me? Thanks in advance corrado

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Advertisement for "Tcl-URL!"
by Cameron Laird May 17, 2004

May 17, 2004

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Re: Tkinter-discuss Digest, Vol 3, Issue 7
by EuGèNe Van den Bulke May 14, 2004

May 14, 2004

Thanks Jeff, it fixed it ... I am sorry about the stupid spelling mistake in the font name :( My apology for the inconvenience. >I think the problem may be as simple as picking the right font for the >Text widget. > >Try using font=("Courier", 12) instead. > >There's probably no font called "courrier" on your system (there wasn't >on mine) so Tk chooses a "platform-specific default font". On my >system, it was an incredibly ugly but fixed-width font. On yours, it >must be some proportional-spaced font. > >Jeff Eugene

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Tkinter, multithreading and Windows
by corrado clementi May 14, 2004

May 14, 2004

Hello I'm writing a kiosk application showing some html tables in one frame and an horizontal ticker in a different frame; each frame has its own thread dealing with its widgets and its data.The application works without any problem under Linux; on Windows the same application dies almost immediately, not being able to update the screen (it hangs on calls to Tkinter methods). How can I deal with these 2 frames updating independently one from the other without hanging the application? Shall I run the update() method each time I use a graphic method? I also tried running two different applications, one for displaying the tables and one dealing with the ticker: in this case I have no longer hangs but how can I move the keyboard focus from one application to the other? Thanks Corrado

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text doesn't look the same in IDLE/console and in Text widget
by EuGèNe Van den Bulke May 14, 2004

May 14, 2004

Hi, I am pretty new to Python and Tkinter and can't find an answer to an annoying problem I am encountering with the Text widget. I can line things up pretty well in the console or IDLE but in a Text widget I can't ... and don't understand why (I have tried many different fonts but it doens't make any difference). A small program is better than a long explanation : ----- from Tkinter import * root=Tk() display=Text(root,font=("courrier", 12)) display.pack() #the type of string I want to display content="%-6s (%6s) %6s\n" % ('micron','rpi','future') content+="%6i (%6i) %6i\n" %(15,178,3) content+="%6i (%6i) %6i\n" %(15,7,13) #output to the console that looks the way I want it to look print content #output to the Text widget that doesn't :( display.insert(END,content) root.mainloop() ----- Thanks for your help, Eugene

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