Mailman 3 April 2005 - Tkinter-discuss

Hooking into custom Tcl/Tk Widgets
by David King May 13, 2005

May 13, 2005

Hi Folks: I am looking to make a custom Tcl/Tk widget available in Tkinter. It is written in C/C++ and does graphics rendering of some custom astronomical data formats. It has previously been driven stand-alone from a C++ program, without benefit of python (i.e., the Tcl/Tk interpreter and its event loop are currently created / run from the top level of a C++ program). I now want to do most of the fancier control GUI creation from python/Tkinter, and embed the widget within that. I will need somehow to send the widget various custom commands to control it from python. Probably even harder, I will need to hook callbacks into various custom 'events' generated by the widget, and process them in python. Guidance / doc pointers covering any of these issues will be welcome. Direct replies preferred (in addition group postings if useful to the general group). Regrard, dk

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more control over truncating long strings in Labels?
by Russell E. Owen April 29, 2005

April 29, 2005

I'd was wondering if there was some fairly easy way to display text in a Label such that it is is anchored on the west (short strings are against the left edge), but too-long strings are truncated on the left. This would be useful for displaying very long path names. It might be even nicer to truncate the text in the middle, replacing the excess text with ..., but truncating on the left would be fine. I fear the only way is to use font metrics (using a tkFont object from the tkFont module) and iteratively try to figure out what length of string will fit. If so, it sounds messy. Hope I'm missing something. -- Russell

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Test mail please ignore
by Vedanta Barooah April 22, 2005

April 22, 2005

-- *~:~*~:~*~:~*~:~*~:~*~:~*~:~*~:~*~:~*~:~* Vedanta Barooah YM! - vedanta2006

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Re: [Tkinter-discuss] Re: tkinter pmw notebook
by dimitri pater April 21, 2005

April 21, 2005

Hello, here is a little test app for the "lowercommand" of the notebook: # test app auto refresh pages of a notebook import Tkinter import Pmw import time class Notebook: def __init__(self, parent): # Create and pack the NoteBook. notebook = Pmw.NoteBook(parent, lowercommand=self.timePlease) notebook.pack(fill = 'both', expand = 1, padx = 10, pady = 10) # Add the "Hello" page to the notebook. page = notebook.add('Appearance') notebook.tab('Appearance').focus_set() # Add the "Now" page to the notebook. page = notebook.add('Now') self.timeframe = Tkinter.Frame(page) self.timeframe.pack(side="bottom", fill="x", anchor="nw", pady=5, padx=5) notebook.setnaturalsize() def timePlease(self, Now): while True: try: self.nowtime.destroy() break except AttributeError: break t = time.strftime("%Y-%m-%d %H:%M:%S",time.localtime(time.time())) self.nowtime = Tkinter.Label(self.timeframe, text=t, pady=15, padx=15) self.nowtime.pack() if __name__ == '__main__': root = Tkinter.Tk() geometry = '400x400+0+0' root.geometry(geometry) root.title('Demo notebook refresh') root.deiconify() Pmw.initialise(root) GUI = Notebook(root) root.mainloop() -- Please visit dimitri's website: www.serpia.com <http://www.serpia.com>

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Thanks
by Marco Aschwanden April 21, 2005

April 21, 2005

Thanks for the link. I will further investigate on it. I found no solution for it that is why I proceeded with my sketched idea... and it works smoother than I thought. Anyhow, thanks for your input. Marco -- Using Opera's revolutionary e-mail client: http://www.opera.com/m2/

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wckgraph double y-axis
by dimitri pater April 20, 2005

April 20, 2005

Hello again, inspired by your great help (and eager to help if I can in posts to come), I have another question that concerns the (very nice) wckgraph package by Fredrik Lundh. I want to "merge" to graphs, they share the x-axis so I need y-axis1 and y-axis2 in one graph. Is this possible? This is how I create the two graphs: self.barCanvas2 = Tkinter.Canvas(self.outputFr2) self.barCanvas2.pack(fill="both", expand=1) bar1 = wckgraph.GraphWidget(self.barCanvas2) bar1.pack(fill="both", expand=1) ydata = [] for i in range(len(fg.data)): x = int(fg.data[i][1]) ydata.append(x) xdata = range(len(fg.data)) data = xdata, ydata bar1.add(wckgraph.Axes(data)) bar1.add(wckgraph.BarGraph(data, barwidth=0.3)) # ShoeSize bar self.barCanvas3 = Tkinter.Canvas(self.outputFr3) self.barCanvas3.pack(fill="both", expand=1) bar2 = wckgraph.GraphWidget(self.barCanvas3) bar2.pack(fill="both", expand=1) ydata2 = [] for i in range(len(fg.data)): x = int(fg.data[i][2]) ydata2.append(x) #xdata2 = range(len(fg.data)) data2 = xdata, ydata2 bar2.add(wckgraph.Axes(data2)) bar2.add(wckgraph.ScatterGraph(data2)) Looks very nice, but how can I merge them into one graph? I have read something about add(layer) but I am not sure if this is the way to do this. Thanks, Dimitri -- Please visit dimitri's website: www.serpia.com <http://www.serpia.com>

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tkinter pmw notebook
by dimitri pater April 20, 2005

April 20, 2005

Hello, does anybody knows how to automatically refresh the content of a page of a notebook? I have been trying several things, no success. Pseudo code: class Notebook: def __init__(self, parent): page = notebook.add('Project') page = notebook.add('Database') b = Tkinter.Button(self.frame2, text='Refresh', width=25, underline=0, command=self.refreshDB) b.pack(side="left", padx=2, pady=2) def refreshDB(self): Now, I use a button on the second page of the notebook, but what I really want is to automatically refresh the page when the user clicks the "Database" tab. Thanks in advance! Dimitri --

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Okay, this one really has me baffled --KeyboardInterrupt signal not working!
by Jared Cohen April 20, 2005

April 20, 2005

Well, I tried your suggestion, but no dice. The problem is that the system command I'm calling, immediately forks several other processes which actually do the work; the initial process seems to be just a dummy. But I can't get the PIDs of those child processes, so I can't kill them from inside the program. In fact, the os.kill() method doesn't even seem to work on the initial, dummy process. I don't think this route is going to pan out. Thanks anyway, though. However, as I said previously, if I physically go into the terminal window and hit Ctrl-C, the interrupt signal works. What I need is some way to do that from inside my program; that is, to send the interrupt signal directly to the controlling terminal. Any ideas?

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Tix failures:: _tkinter.TclError: invalid command name "tixNoteBook"
by Steven Reddie April 20, 2005

April 20, 2005

Hi, I'm having trouble getting Tix to work (appologies if the Tkinter list isn't the correct place for Tix issues). I'm guessing that it's a configuration problem, however I get the exact same failures with Cygwin's Python and the python.org Windows Python, on multiple machines. Here is a session using the python.org Windows Python 2.4: Python 2.4 (#60, Nov 30 2004, 11:49:19) [MSC v.1310 32 bit (Intel)] on win32 Type "help", "copyright", "credits" or "license" for more information. >>> import Tkinter >>> import Tix >>> Tix.Grid() <Tix.Grid instance at 0x009D5DF0> >>> Tix.NoteBook() Traceback (most recent call last): File "<stdin>", line 1, in ? File "C:\Program Files\Python24\lib\lib-tk\Tix.py", line 1138, in __init__ TixWidget.__init__(self,master,'tixNoteBook', ['options'], cnf, kw) File "C:\Program Files\Python24\lib\lib-tk\Tix.py", line 307, in __init__ self.tk.call(widgetName, self._w, *extra) _tkinter.TclError: invalid command name "tixNoteBook" The path includes "C:\Program Files\Python24" and "C:\Program Files\Python24\DLLs" so I'm assuming the issue isn't that tix8184.dll couldn't be found, and since Tkinter is working elsewhere I'm assuming that the issue isn't that tcl isn't configured properly, but maybe it hasn't been configured for tix? When using Cygwin's Python the results are identical (except for the instance address and path to Tix.py); this is for Python 2.4 on the same machine and 2.3 on another machine. I've found various posts (about: _tkinter.TclError: invalid command name "???????") but none have helped. Any help would be much appreciated. Regards, Steven

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realtime resizing
by Marco Aschwanden April 20, 2005

April 20, 2005

Hi I am laying out widgets on a canvas. I would like to be able to resize this widget on runtime as follows: 1. The cursor changes close to the edges of the widget (or when exiting) into an appropiate "resizing"-cursor. 2. When the user clicks now on the widget he may resize the widget (<B1-Motion>). How would I do that? Here are my thoughts: The only way I can think of cheating around: 1. Place the the widget XYZ into a frame. 2. Pad widget XYZ with 1-2 pixels within the frame. 3. When entering the surrounding frame, the "resizing"-cursor is set depending on the exit/entry point. 4. When the user clicks now <B1-Motion> it will resize the widget XYZ. The extra frame and the extra padding space disturbs me. I would like to define all "events" on the widget. Any suggestions? I found none so far. Thanks for any hints, Cheers, Marco

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