Mailman 3 July 2006 - Tkinter-discuss

Framed
by Cam Nov. 28, 2006

Nov. 28, 2006

Hello list, The following little test program works as expected. But if you change the line marked "----- Here ----" so it reads: self.Frame2 = Pmw.ScrolledFrame(self) then it blows up on an error deep inside Tkinter when attempting to create the button mentioned on the following line. All I wanted to do was trade a Frame for a ScrolledFrame. I'm stumped as to why it blows up. Anybody out there know? Thanks Cam ps I realize that in this example Frame2 is redundant. I encountered the problem in a larger case. To generate the example shown below I stripped out pretty much everything that wasn't necessary to demonstrate the problem. - - - - - import Pmw from Tkinter import * class Test(Frame): def __init__(self,Master=None,**kw): apply(Frame.__init__,(self,Master),kw) self.Frame2 = Frame(self) #<---- HERE ---- self.Frame2.pack(side='left') self.Button1 = Button(self.Frame2) self.Button1.pack(side='top') Root = Tk() Pmw.initialise(Root) App = Test(Root) App.pack(expand='yes',fill='both') Root.geometry('640x480+10+10') Root.mainloop()

4 5

MouseWheel bug in cygwin
by Vasilis Vlachoudis July 27, 2006

July 27, 2006

Hi All, The following program works nicely with windows Python, but it crashes with no any information under cygwin Regards Vasilis from Tkinter import * root = Tk() canvas = Canvas(root) canvas.pack(side=TOP, expand=YES, fill=BOTH) for i in range(1000): canvas.create_text(10, i*20, text="Hello world %d" % (i), anchor=NW) def wheel(event): print "wheel" canvas.yview(SCROLL, -event.delta//120, UNITS) canvas.focus_set() canvas.bind('<MouseWheel>', wheel) #canvas.bind('<4>', lambda e : canvas.yview(SCROLL, -1, UNITS)) #canvas.bind('<5>', lambda e : canvas.yview(SCROLL, 1, UNITS)) root.mainloop()

1 0

slow moving on Canvas
by Pavel Kosina July 23, 2006

July 23, 2006

I got two similar programs- one in Livewires and one in Tkinter. Just moving the player on a canvas. Why is that one in Tkinter so slow? What did I miss? Livewires is based on Tkinter, so it should be the same. I looked at the code of Livewires, tried something, but no success. Maybe its because of sleeping part in event handler in Tkinter, that is somehow (how?) bypassed in Livewires by magic tkinter.dooneevent(tkinter.DONT_WAIT). Neither this worked with me. Could anyone help? Both programs attached. -- geon Pavel Kosina

1 0

Tkinter DnD - Drag and Drop
by Michael Foord July 19, 2006

July 19, 2006

Hello all, There is a Tcl/Tk package called tkDnD with a Python wrapper called TkinterDnD, which allow drag and drop operations with a Tkinter GUI. http://sourceforge.net/projects/tkdnd http://www.8ung.at/klappnase/TkinterDnD/TkinterDnD.html This should allow you to create callbacks for files dropped onto Tkinter windows, something I am keen to do. It looks like the TkinterDnD package is designed to be used with the older version 1 of tkDnD. It also looks like this doesn't work with Python 2.4. I can get the tkDnD package (v1) installed into the Tcl package that comes with Python (for Windows XP SP2). The TkinterDnD demo runs, and icons appear when you drag files over the windows. However the callbacks don't happen. Does anyone have any success in getting any combination of these packages working with Python 2.4 and windows ? All the best, Fuzzyman http://www.voidspace.org.uk/python/index.shtml

2 4

Tkinter DnD - Drag and Drop
by Michael Foord July 13, 2006

July 13, 2006

Hello all, There is a Tcl/Tk package called tkDnD with a Python wrapper called TkinterDnD, which allow drag and drop operations with a Tkinter GUI. http://sourceforge.net/projects/tkdnd http://www.8ung.at/klappnase/TkinterDnD/TkinterDnD.html This should allow you to create callbacks for files dropped onto Tkinter windows, something I am keen to do. It looks like the TkinterDnD package is designed to be used with the older version 1 of tkDnD. It also looks like this doesn't work with Python 2.4. I can get the tkDnD package (v1) installed into the Tcl package that comes with Python (for Windows XP SP2). The TkinterDnD demo runs, and icons appear when you drag files over the windows. However the callbacks don't happen. Does anyone have any success in getting any combination of these packages working with Python 2.4 and windows ? All the best, Fuzzyman http://www.voidspace.org.uk/python/index.shtml

1 0

System Font Size
by Fuzzyman July 13, 2006

July 13, 2006

Hello all, I'm creating a windows application, with a Tkinter GUI. I currently happily set the font sizes using tuples ``font=("name", "size", "weight")``. (or something like that.) I use a couple of different sizes for titles, subtitles, body text and buttons. I would like to detect the system font size, so that I can respond to this. (In case the user has specified larger fonts). Does anyone know how I can do this ? Oh, and while I'm on the subject, does anyone know of a pure Python combobox other than the Pmw one ? The Pmw one is fine, it just means distributing the Pmw extension with my application, and if I could replace this with a single file I would. All the best, Fuzzyman http://www.voidspace.org.uk/python/index.shtml

5 6

Tix.Grid wrapper
by Michael Lange July 12, 2006

July 12, 2006

Hi all, just for fun I wrote a wrapper for the Tix.Grid and Tix.ScrolledGrid widgets. You can find it at: www.8ung.at/klappnase/TixGrid/TixGrid.html . The zip-file includes a short test script with code examples and most of the methods and options are documented in the source. Although some of the tixGrid commands seem to have no effect (and due to the poor tix documentation I could not figure out the use of some commands) it may be not too bad at least for simple table display tasks. If anyone has a use for it, it would be nice, if you would report your experience with it here. Maybe after some more testing it could be something to contribute. Regards Michael

1 0

Tkinter Menu
by Michael Foord July 11, 2006

July 11, 2006

Hello all, I want to dynamically re-arrange menus. If I store a reference to the top level menubar instance or the children cascades, how can I access members of the menu ? I would like to remove certain entries and then replace them 'in place' with others. I can currently do this by destroying the whole menubar and replacing it with a new one, but this seems over the top. All the best, Fuzzyman http://www.voidspace.org.uk/python/index.shtml

4 6

Tkinter TopLevel transparency
by Metz, Bobby W, WWCS July 6, 2006

July 6, 2006

All, Looking for help on making my toplevel window backgrounds opaque or transparent. I've seen sparse mention of setting the alpha property of the toplevel, but the only other mention I've seen in any documentation has to do with canvas widgets. I'm running python 2.4 and the toplevel returns an error when I try to set the alpha param. >>> from Tkinter import * >>> root = Tk() >>> root.wm_attributes('-alpha', 0.5) Traceback (most recent call last): File "<pyshell#6>", line 1, in ? root.wm_attributes('alpha', 0.5) File "c:\python24\lib\lib-tk\Tkinter.py", line 1386, in wm_attributes return self.tk.call(args) TclError: wrong # args: should be "wm attributes window ?-disabled ?bool?? ?-toolwindow ?bool?? ?-topmost ?bool??" I first saw this referenced on effbot.org and was hoping to use it. http://effbot.org/tkinterbook/wm.htm In Win32 programming I know this is a two step process but haven't found any equiv documentation for Tkinter and using the Python win32 modules doesn't work as seen here for Notepad. import win32con import win32api import win32gui import winxpgui # Notepad window handle hWND = 1050292 # Prep the window for transparency...creates buffer of some sort in Windows win32gui.SetWindowLong (hWND, win32con.GWL_EXSTYLE, win32gui.GetWindowLong (hWND, win32con.GWL_EXSTYLE ) | win32con.WS_EX_LAYERED ) # Get the window background color bgColor = win32api.GetSysColor(win32con.COLOR_WINDOW) r = bgColor & 0xFF g = (bgColor & 0x0000FF00) >> 8 b = (bgColor & 0x00FF0000) >> 16 # Re-compute the RGB value to pass to the SetLayeredWindowAttributes function winxpgui.SetLayeredWindowAttributes(hWND, win32api.RGB(r, g, b), 50, win32con.LWA_COLORKEY|win32con.LWA_ALPHA) Any pointers would be greatly appreciated! Thanks, Bobby

1 0

PataPata as a Tkinter-based GUI designer
by Paul D. Fernhout July 6, 2006

July 6, 2006

Version 0.2.02 of PataPata has just been released on SourceForge. PataPata is an experiment about making a live Python object environment of Prototypes and Morphs. It is intended mainly to support building educational simulations and other microworlds for informal "constructivist" education and "unschooling". It has previously been discussed on the edusig list, but perhaps some people here might also find it of interest for the Tkinter-related aspects. The primary GUI interface is currently written in TK/Tkinter, and supports interactively building TK-related projects (though only ones under the GPL for now). My focus on Tkinter at this point is mainly for easy installability, although the value of the TK library has been growing on me as I use it more. Almost two years ago, Eric Brunel posted this comment on Tkinter GUI building: http://www.codecomments.com/archive284-2004-10-305528.html and I think the PataPata approach might potentially address the issues he raises there on the need for better Tkinter GUI designer which can support a wide range of widgets for multiple TK-related libraries. Basically, as part of a larger effort to bring some of the more dynamic qualities of Self and Squeak to Python, PataPata brings "prototypes" with "properties" (beyond the Python properties) to Python programming. This makes it easier to wrap arbitrary GUI components, whether existing Tkinter widgets, adding pure TCL/TK widgets (an example for that is included in the latest 0.2.02 for a combobox and tablelist), or, theoretically (as I haven't tried it yet), addign widgets from PMW, Tix, BWidgets, and so on. Or, in theory, and not at the same time as using TK widgets, even widgets from WX, GTK, or whatever could be wrapped. PataPata had an earlier and simpler WX GUI which has not been kept up-to-date, but used the same wrapping approach, providing some hopes for cross-platform GUIs. I know there are many efforts related to that kind of support already (AnyGUI, PyUI, etc.), of course, though I think they come at it from a different perspective, and their widgets could also in theory be wrapped in PataPata as well. Another included example wraps an "xturtle" widget (an advanced version of a 2D turtle by Gregor Lingl as a sophisticated library using Tkinter). There is still no way around doing some hand-coding wrapping work for each widget, but PataPata provides at least a framework for doing that work and for being able to get started with it easily to do some simple wrapping of a widget, and then add more wrapping as more functionality is needed. There is limited PythonCard compatibility as well, as I chose to use PythonCard naming conventions for access to many features of the Tkinter widgets. This limited compatibility may make it somewhat easier to port some simple PythonCard applications to Tkinter, though it still takes a bunch of work (one example of doing this for the PythonCard sample "conversions" is included) and many PythonCard widgets are not yet supported. But you can at least take a PythonCard resource file and convert it to PataPata if all the widgets types used are supported, as a start to then doing hand coding for the rest of the functionality (which is a tribute to PythonCard's modular design). Now there may well be other approaches to the issues Eric Brunel brought up, so this isn't to say PataPata is intended primarily to solve these issues, just that in addition to its main purpose of bringing to Python the notion of Prototypes and Morphs (that Squeak and Self have to varying degrees), PataPata also provides an approach to handling those other issues, which may be of interest to Tkinter users. Here is the project web site: http://sourceforge.net/projects/patapata/ Screenshots: http://sourceforge.net/project/screenshots.php?group_id=165910 A homepage with links to more information (including screencasts by Francois Schnell): http://patapata.sourceforge.net/ I had to resolve a few tricky Tkinter-related issues in the process, and the archives of this list were very useful, thanks. :-) Anyway, PataPata is still very much an experiment and work in progress, so this isn't intended to convince you to move all your Tkinter work in it, just to mention it as something being played with at the moment. There remain lots of things to do for it and lots of ways it can be improved (and probably some bugs too, of course. :-) --Paul Fernhout

1 0