Mailman 3 February 2016 - Tkinter-discuss

Control position of Tkinter common dialogs?
by python＠bdurham.com Dec. 9, 2016

Dec. 9, 2016

Python 2.7 under Windows: How can we control the position of Tkinter's common dialogs? Here's what we've discovered: * Certain common dialogs always open up relative to their parent window * Certain common dialogs always open up centered on the user's desktop * All common dialogs appear to ignore the optional parent= parameter Questions: * How can we force a dialog to open up relative to its parent window? * How can we force a dialog to open up centered on the user's desktop? Background: import tkColorChooser as colorchooser import tkFileDialog as filedialog import tkMessageBox as messagebox # always open up relative to parent windows fileOpen = filedialog.askopenfilename() fileOpens = filedialog.askopenfilenames() fileSaveAs = filedialog.asksaveasfilename() color = colorchooser.askcolor() # always open up centered on desktop folderOpen = filedialog.askdirectory() messagebox.askquestion() Malcolm

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Transferring tags from one Text() to another
by Bob Greschke Feb. 14, 2016

Feb. 14, 2016

I write stuff to a Text() and some words and lines are different colors or are links (binds) using Tags. I can Text().get(0.0, END), get all of the text, then insert that in another Text() to make a copy, but how do I get/transfer the other "formatting" info? The binds aren't real important, but the different colored text would be nice. Thanks! Bob

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Debugging non-zero exit code
by Reinis Danne Feb. 7, 2016

Feb. 7, 2016

Hi! I'm trying to debug why BKChem prints '0' and exits with exit code 1. As far as I can tell that is not directly in the app. I tried to debug it with gdb, but it tried (and failed) to start the app again after I have pressed the close button, so I didn't get any useful info out of it. How could I debug this issue? The application setup code is in bkchem.py and the main class is in main.py. To test: $ git clone https://gitlab.com/bkchem/bkchem.git $ cd bkchem $ git submodule init $ git submodule update $ python bkchem/bkchem.py Should work with Python 2 and 3. Any tips how to deal with this would be appreciated. Also it would be great if someone could review the tkinter setup sequence. Reinis

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Moving object on page leaves afterimage on Python 3 but not on 2
by Reinis Danne Feb. 5, 2016

Feb. 5, 2016

Hi! I'm porting a chemistry drawing program BKChem [1] to Python 3 using the shared codebase between versions 2 and 3. It is working fine on Python 2, but if I run it with Python 3 I have an issue with redrawing the page. The issue is that if I move an object by mouse then it leaves an image of the object in the old place while moving the object to the new place (Python 3). There is no such afterimage with Python 2. Similar effect can be achieved if object is deleted or its creation is undoed - object is removed, but lines remain. It seems that text is updated correctly, only bonds (lines) have the issue. Any ideas where the bug might be and how to debug it? As far as I understand the moving of the object and updating the drawing is up to tkinter or the underlying tk. It could be an issue with the app losing track of the object, but in that case it wouldn't create new lines (if I drag and drop an object several times, several afterimages remain, but not 100% of the time; usually the very first move works, but later ones produce the afterimages). So I think it is a lower level issue. To test: $ git clone https://gitlab.com/bkchem/bkchem.git $ cd bkchem $ git submodule init $ git submodule update $ python3 bkchem/bkchem.py Regards, Reinis [1] https://gitlab.com/bkchem/bkchem

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