Mailman 3 November 2006 - Tkinter-discuss

Re: [Tkinter-discuss] How to dettach a Toplevel
by Sorin Schwimmer Jan. 4, 2007

Jan. 4, 2007

Hi Michael, I see your point, but this is not what I am looking for. What I'm trying to achieve goes on the following lines: the user has a GUI and works. A daemon (I'm on Linux) receives a message for the user, so it pops-up a little notification symbol (there is actualy a bit more inter-process communication, but it is not relevant for the GUI part). If the user checks right away what's going on, then the pop-up dissapears. But (s)he may decide to check later, and even decide to close the application; the symbol needs to stay there. My symbol is not intrusive, is a little undecorated window, the size of the "close", "restore", and "minimise" buttons, and I place it close to them. It is on a red background, so it attracts attention, but the user can work with it there without problems. That's why I need to "dettach" it. Thanks anyway for your suggestion, Sorin ____________________________________________________________________________________ Do you Yahoo!? Everyone is raving about the all-new Yahoo! Mail beta. http://new.mail.yahoo.com

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Re: [Tkinter-discuss] How to dettach a Toplevel
by Sorin Schwimmer Nov. 30, 2006

Nov. 30, 2006

Mainloop is included. Basically, the daemon starts a thread that waits for KDE, and does its job in the main thread. The function that is started looks like this: def inittk(): global rtk while True: sleep(60) try: rtk=Tk(screenName=':0.0') except: continue break rtk.mainloop() I omitted labels, entries, the undecoration, withdrawal... but I guess you have the idea of what I try to accomplish. The only thing that goes to my mind is that I start mainloop, but then, as the function and the thread are going out of scope, they take mainloop with them. Pointers are welcomed... Thanks, Sorin ____________________________________________________________________________________ Do you Yahoo!? Everyone is raving about the all-new Yahoo! Mail beta. http://new.mail.yahoo.com

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Re: [Tkinter-discuss] How to dettach a Toplevel
by Sorin Schwimmer Nov. 30, 2006

Nov. 30, 2006

After hitting "send" with John's answer I saw Matthias question. So here is my next answer: Yes, it is a daemon "a la carte". It forks, os.setsid, forks, redirects sys.stdin and sys.stdout to /dev/null. The code resides in /etc/init.d and dependencies are taken care of. But I don't think this should be a problem because the following works from the Python prompt, as root, in screen 1, targeting screen 7 (where my KDE loads) which is under <regular user> control: <code> >>> import sys >>> from Tkinter import * >>> sys.stdout=open('/dev/null','w') >>> r=Tk(screenName=':0.0') >>> Label(r,text='Gutten Tag!').grid() </code> My daemon does all kind of other things, and it does them well; my only issue is when I have to break its silence and inform the user, in GUI, about issues that (s)he may need to take action. My preferred approach was the one described here, my alternative was the dettached Toplevel described in my first posting; I can't make none to work. Thanks for suggestions, Sorin __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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Re: [Tkinter-discuss] How to dettach a Toplevel
by mkieverpy＠tlink.de Nov. 30, 2006

Nov. 30, 2006

Sorin Schwimmer wrote: >Hi Michael, While the two toplevel solution will work nicely, I'm not sure how would I close the main >application (at one point I want to be able to do so). As for the other suggestion, that was my first >approach, but it doesn't work. I don't know why, and sometime I'll have to find out, as I'll need later in >my project. What happens is that when the users logs in (no authentication required) I have a small >script in KDE Autostart to issue an xhost local:root allowing the daemon to show his stuff. The daemon >waits until KDE is up and running and xhost was executed, then it does a root=Tk(screenName=':0.0') >Nothing comes on. If I fire up a Python interpreter and do the things manualy, it works flawless: I have a >graphic window controlled by root, can populate it, withdraw it, iconify it, destroy it... It proves that from >an X server standpoint things are set correctly, but my daemon does something wrong (it may be that >the window is created and destroyed immediately, I don't know). Thanks for your ideas, and give me >more if possible Sorin Do you use a normal process or really a daemon? When using a daemon it might have something to do with the restricted process environment which prevents python/tcl from starting or something like that. Try to get easy things to work first, like create an empty file from python in a place where everybody is allowed to. Hope this helps, Matthias Kievernagel (mkiever.at.web.dot.de)

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Re: [Tkinter-discuss] How to dettach a Toplevel
by Sorin Schwimmer Nov. 30, 2006

Nov. 30, 2006

Hi Michael, While the two toplevel solution will work nicely, I'm not sure how would I close the main application (at one point I want to be able to do so). As for the other suggestion, that was my first approach, but it doesn't work. I don't know why, and sometime I'll have to find out, as I'll need later in my project. What happens is that when the users logs in (no authentication required) I have a small script in KDE Autostart to issue an xhost local:root allowing the daemon to show his stuff. The daemon waits until KDE is up and running and xhost was executed, then it does a root=Tk(screenName=':0.0') Nothing comes on. If I fire up a Python interpreter and do the things manualy, it works flawless: I have a graphic window controlled by root, can populate it, withdraw it, iconify it, destroy it... It proves that from an X server standpoint things are set correctly, but my daemon does something wrong (it may be that the window is created and destroyed immediately, I don't know). Thanks for your ideas, and give me more if possible Sorin __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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How to dettach a Toplevel
by Sorin Schwimmer Nov. 28, 2006

Nov. 28, 2006

Hi, If I have: <code> from Tkinter import * root=Tk() tl=Toplevel() root.mainloop() </code> and then close the root window, it will take tl with it. Is there a way to keep tl alive after root dies? Thanks, Sorin ____________________________________________________________________________________ Yahoo! Music Unlimited Access over 1 million songs. http://music.yahoo.com/unlimited

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A small fix for NoteBook in Tix
by Sorin Schwimmer Nov. 28, 2006

Nov. 28, 2006

Problem: <code> >>> from Tix import * >>> root=Tk() >>> nb=NoteBook(root) >>> nb.add('pg_1', label='pg 1') >>> nb.pages() Traceback (most recent call last): File "<stdin>", line 1, in ? File "/usr/local/lib/python2.4/lib-tk/Tix.py", line 1160, in pages ret.append(self.subwidget(x)) File "/usr/local/lib/python2.4/lib-tk/Tix.py", line 337, in subwidget raise TclError, "Subwidget " + name + " not child of " + self._name _tkinter.TclError: Subwidget p not child of -1211878740 </code> Visiting Tix.py I found at line 1155 the following function: <code> def pages(self): # Can't call subwidgets_all directly because we don't want .nbframe names = self.tk.split(self.tk.call(self._w, 'pages')) ret = [] for x in names: ret.append(self.subwidget(x)) return ret </code> The issue is that, for only one tab "names" is a string (the name of the tab), while for 2 or more it is a tuple of names of tabs. For an empty NoteBook, "names" is an empty string. The for loop in the case of one tab will go through the letters of the tab's name, and that is where subwidget fails. Resolution: <code> def pages(self): # Can't call subwidgets_all directly because we don't want .nbframe names = self.tk.split(self.tk.call(self._w, 'pages')) ret = [] if names and type(names) == type('a'): # sxn # 1 tab gives a string ret.append(self.subwidget(names)) # sxn # else: # sxn # 2+ tabs give a tuple for x in names: ret.append(self.subwidget(x)) return ret </code> I am on Linux, Python 2.4.2, Tcl/Tk 8.4, Tix 8.2 Sorin ____________________________________________________________________________________ Yahoo! Music Unlimited Access over 1 million songs. http://music.yahoo.com/unlimited

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Re: [Tkinter-discuss] Stumped
by Sorin Schwimmer Nov. 28, 2006

Nov. 28, 2006

I never tried Bob's Greschke idea of using update() in a callback, because of this reason: http://www.pythonware.com/library/tkinter/introduction/x9374-event-processi… Sorin __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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Re: [Tkinter-discuss] Stumped
by Sorin Schwimmer Nov. 28, 2006

Nov. 28, 2006

Add in your functions, first statement after def global CancelNow This way everybody refers *the same* flag. I would normally move your second-last statement (CancelNow = False) just below imports. De-stumped? Sorin ____________________________________________________________________________________ Do you Yahoo!? Everyone is raving about the all-new Yahoo! Mail beta. http://new.mail.yahoo.com

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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()

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