Mailman 3 September 2011 - 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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ttk.Notebook - how to bind to tab events (tab caption has focus or mouseover)
by python＠bdurham.com May 9, 2012

May 9, 2012

I'm using the ttk.Notebook widget. What object do I bind to capture events related to specific tabs? I would like to trap when a tab caption gets keyboard focus ('<FocusIn>') and when the mouse pointer is over a specific tab caption ('<Enter>'). I can trap mouse clicks on tabs (<Button-1>, <Button-3>), but I can't find a way to determine what tab a user clicked on in the case of a right click. Thank you, Malcolm

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embedding in Tkinter
by Alessandro Magni Sept. 7, 2011

Sept. 7, 2011

> On 06/09/11 22:24, Alessandro Magni wrote: > > Hi everybody, > > I hope somebody here can give me a hand - I'm not so expert in GUI programming. > > I tried - in a Tkinter program I'm writing - to embed a terminal > > (linux here) in the main window - the program is a simple wiki, and I > > believe it's useful to have a small terminal handy... > > Optionally, I would like also to be able to let my program interact > > with the terminal - at a minimum I'd like to read the current working > > directory, and to set it. > I've modified your little example above with some success: > > from Tkinter import * > import os > > root = Tk() > termf = Frame(root, height=200, width=400) > termf.pack(fill=BOTH, expand=YES) > wid = termf.winfo_id() > os.system('xterm -into %d -geometry 400x200 -e /root/.bashrc&' % wid) > > root.mainloop() . . > Alessandro, when you write "Optionally, I would like also to be > able to let my program interact with the terminal - at a minimum > I'd like to read the current working directory, and to set it" > and "... it doesn't work", I am unsure of your meaning. John > answered what I understand of your question about Tkinter coding > well; do you also want help communicating between the xterm's > $SHELL and the Python application, or do you have what you need > for that aspect, already? John, Cameron, thank you so much for your help... I feel a bit stupid, what was happening was a problem in the launch of xterm (I mistakenly wrote an option), Tkinter works flawlessly... Anyway I'm glad we talked about it since the general mood on stackoverflow was - as I said - that a) it was a very complex problem and b) you could not hope to solve it with such a joke as Tkinter. Serve them right! I answered them with your help, let's see if they can do it in so few lines with pyGTK :-) Anyway I'm still working on the interaction between the program and the terminal: I dont know if it can be done internally by python, but I found this program http://www.thrysoee.dk/xtermcontrol/ that could help, I'm working on it... thank you again alessandro

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Programmatic control of a ttk combobox
by Trevor J Christensen Sept. 7, 2011

Sept. 7, 2011

How could/would one programmatically open/close a ttk combobox (i.e. present/hide the list of values) without requiring the user to click on combobox down arrow? In other words, I want to programmatically change focus (from where ever it is) to the combobox and have the combobox list of values displayed (just as if I had clicked on the combobox down arrow control). I fiddled around with setting state (['pressed'] and ['focus']) but didn't succeed accomplishing this. Trevor

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embedding in Tkinter
by Alessandro Magni Sept. 7, 2011

Sept. 7, 2011

Hi everybody, I hope somebody here can give me a hand - I'm not so expert in GUI programming. I tried - in a Tkinter program I'm writing - to embed a terminal (linux here) in the main window - the program is a simple wiki, and I believe it's useful to have a small terminal handy... Optionally, I would like also to be able to let my program interact with the terminal - at a minimum I'd like to read the current working directory, and to set it. I tried asking about it on stackoverflow, but without much results (apart from some suggestions about pyGTK being the wave of the future, of course...) I don't know if it is really impossible - but at least I was able to do it in the past with Perl/Tk, so maybe it can be replicated here. The code I used then was something like: $frame3=$mw->Frame(); $cv=$frame3->Canvas()->pack(-expand => 1, -fill => 'both'); my $xtermContainer = $cv->Frame(-container => 1); # this Frame is needed for including the xterm in Tk::Canvas my $xtid = $xtermContainer->id(); my ($xtId) = sprintf hex $xtid; # converting the id from HEX to decimal as xterm requires a decimal Id my $dcontitem = $cv->createWindow($xtermWidth/2,$xtermHeight/2, -window => $xtermContainer, -width => $xtermWidth, -height => $xtermHeight, -state => 'normal'); system("xterm -into $xtId -fn $fontname -geometry $geometry +sb -bg black -fg white -e ./xtermjob.pl &"); (...hoping no python purist wants to shoot me in the head for showing perl in a python mailing list :-) I tried using a code similar to the following, but it doesnt work... termf = Frame(root) termf.pack(side=BOTTOM, fill=X) id=termf.winfo_id() os.system("xterm -into %d -e /root/.bashrc &" % id); Does somebody here have an experience with this problem? Thanks a lot! alessandro

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Re: [Tkinter-discuss] scrolled canvas ,strange problem
by 守株待兔 Sept. 5, 2011

Sept. 5, 2011

i want to save my phote in computer,so i add canvas.postscript(file="mystock.eps") there is a file named mystock.eps,but nothing in it!I want to know how to save my canvas as an image file. ------------------ Original ------------------ From: "johnmc"<johnmc(a)velseis.com>; Date: Sun, Sep 4, 2011 11:26 AM To: "contro opinion"<contropinion(a)gmail.com>; "John McMonagle"<jmcmonagle(a)velseis.com>; "Tkinter-discuss"<tkinter-discuss(a)python.org>; Subject: Re: [Tkinter-discuss] scrolled canvas ,strange problem On Sat, 3 Sep 2011 17:31:24 +0800, contro opinion wrote > i have written a program in tkinter to draw stock graph,there are two > strange thing i can't understand > the attachment is 'AAU' data file(attachment 1).when you download it > ,please save it in /tmp/AAU > there is a scrolled canvas in it , > > 1.strang long line,please see my attachment. > i have see my data ,my formulation ,no wrong,but the line is so long!! > I haven't analysed it thoroughly, but your horizontal scale for the data does not match the horizontal scale for your labels or motion reporting. The "long line" you see actually matches the data on line 1089 in your data file. The date on this line is 2007-02-27. > 2.there is no motion event reaction in the right of canvas,only > motion event reaction in the left of canvas. The IS a motion event throughout the entire canvas. Again, your problem seems to be with your horizontal scale. The far right coordinate is 5710, yet you only report the motion to 2764, the upper limit of self.xsqueen. > 3.i have round function ,but the output is still more fractions than 2. Whether you round a float or not has no impact on how it is displayed as a string. You need to use the appropriate string formatting. If you want two decimal places try the following format: %.2f rather than %f. The rounding will also be properly handled by the string formatting, so there will be no need to use the round function. Regards, John -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. _______________________________________________ Tkinter-discuss mailing list Tkinter-discuss(a)python.org http://mail.python.org/mailman/listinfo/tkinter-discuss

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scrolled canvas ,strange problem
by contro opinion Sept. 4, 2011

Sept. 4, 2011

i have written a program in tkinter to draw stock graph,there are two strange thing i can't understand the attachment is 'AAU' data file(attachment 1).when you download it ,please save it in /tmp/AAU there is a scrolled canvas in it , 1.strang long line,please see my attachment. i have see my data ,my formulation ,no wrong,but the line is so long!! 2.there is no motion event reaction in the right of canvas,only motion event reaction in the left of canvas. 3.i have round function ,but the output is still more fractions than 2. ------------------ 原始邮件 ------------------ *发件人:* "John McMonagle"<jmcmonagle(a)velseis.com>; *发送时间:* 2011年9月2日(星期五) 中午1:48 *收件人:* "1248283536"<1248283536(a)qq.com>; *抄送:* "Tkinter-discuss"<tkinter-discuss(a)python.org>; *主题:* Re: [Tkinter-discuss] tkinter and cursor On 02/09/11 13:59, 守株待兔 wrote: > > you can get a figure with the program, when you move mouse on the canvas (figure),you can see the coordinate on the right corner , i want to make it in tkinter,there is no "move click in the canvas" event in tkinter,how to make it in tkinter?? > You can use the "<Motion>" event. You also should be converting the event.x and event.y to canvas coordinates. This is especially important when your canvas also includes scrollbars. So, using your code from previous posts, from the myprint function onwards, def myprint(event): # convert the event coordinates to canvas coordinates x = canvas.canvasx(event.x) y = canvas.canvasy(event.y) # find the poistion in the top right corner of your canvas widget # less a little bit so as to see the displayed text cx = canvas.winfo_width() - 10 cy = 10 # delete previous displayed text canvas.delete('coords') # display the coordinates canvas.create_text(cx,cy,anchor=E, text='%d,%d' % (x,y), tags='coords') canvas.bind("<Motion>", myprint) root.mainloop() This will display the canvas coordinate in the top right corner of the canvas widget. Suggested reading on Canvas: http://effbot.org/tkinterbook/canvas.htm Suggested reading on events: http://effbot.org/tkinterbook/tkinter-events-and-bindings.htm Regarsd, John -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.

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scrolled canvas , strange problem, i find something
by contro opinion Sept. 4, 2011

Sept. 4, 2011

in my program,i want to draw line which date is ['2008-06-02','2008-06-03','2008-06-04','2008-06-05','2008-06-06','2008-06-09','2008-06-10'] please see the code line draw 130 ,what i get is (please see the attachment) 2010-12-15, it is so strange thing?? i can't understand please download the data (AAU),save it in "/tmp" and run the draw code,you can see.

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scrolled canvas ,strange problem
by contro opinion Sept. 3, 2011

Sept. 3, 2011

i have written a program in tkinter to draw stock graph,there are two strange thing i can't understand the attachment is 'AAU' data file(attachment 1).when you download it ,please save it in /tmp/AAU there is a scrolled canvas in it , 1.strang long line,please see my attachment. i have see my data ,my formulation ,no wrong,but the line is so long!! 2.there is no motion event reaction in the right of canvas,only motion event reaction in the left of canvas. 3.i have round function ,but the output is still more fractions than 2.

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tkinter and cursor
by 守株待兔 Sept. 2, 2011

Sept. 2, 2011

from matplotlib.widgets import Cursor import numpy as np import matplotlib.pyplot as plt fig = plt.figure(figsize=(8, 6)) ax = fig.add_subplot(111, axisbg='#FFFFCC') x, y = 4*(np.random.rand(2, 100)-.5) ax.plot(x, y, 'o') ax.set_xlim(-2, 2) ax.set_ylim(-2, 2) # set useblit = True on gtkagg for enhanced performance cursor = Cursor(ax, useblit=True, color='red', linewidth=2 ) plt.show() you can get a figure with the program, when you move mouse on the canvas (figure),you can see the coordinate on the right corner , i want to make it in tkinter,there is no "move click in the canvas" event in tkinter,how to make it in tkinter??

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