On 6/11/2017 10:06 PM, jf...@ms4.hinet.net wrote:
I had donwload wdiget-tour-py3.tar.gz examples from this site:
http://www.hullsvle.ch/moodle/mod/resource/view.php?id=6697
and run one of its scripts canvasruler.py, I get stange result.
First, when I run it in the cmd box, although I get a message in the box,
but everything else is fine. The GUI works correctly.
D:\Temp\widget-tour-py3>python canvasruler.py
can't invoke "event" command: application has been destroyed
while executing
"event generate $w <<ThemeChanged>>"
(procedure "ttk::ThemeChanged" line 6)
invoked from within
"ttk::ThemeChanged"
I have seen this too. It is not specific to any python/tkinter code,
but is specific to exiting with some things destroyed and something not.
This must be coming from tcl or tk, not python or tkinter.
Second, I try to find out where is this message comes from. I insert
a statement "import pdb; pdb.set_trace()" at the source line 33:
33 import pdb; pdb.set_trace()
34 #
35 # Note : to execute the Tk command, I need to create a Toplevel window
36 # I guess I could use the toplevel create in widget.py, buth then this
37 # module would not run stand-alone
38 #
39 temp = Tk()
40 STIPPLE_BITMAP = temp.tk.eval(
41 'image create bitmap @%s' % STIPPLE_BITMAP_FILE )
42 ## Now I can delete the spurious window
43 temp.destroy()
44
45
46 TAB_NORMAL_STYLE = {'fill':'black', 'stipple':''}
47 TAB_INRANGE_STYLE = {'fill':'green', 'stipple':''}
48 TAB_OUTOFRANGE_STYLE = {'fill':'red', 'stipple':STIPPLE_BITMAP}
49
50
51 class RulerCanvas (Canvas):
and run this script under interpreter, it stops at the point correctly and
I can step through to reach the line 51 without seeing that message appear.
D:\Temp\widget-tour-py3>python
Python 3.4.4 (v3.4.4:737efcadf5a6, Dec 20 2015, 19:28:18) [MSC v.1600 32
bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import canvasruler
> d:\work\python\widget-tour-py3\canvasruler.py(39)<module>()
-> temp = Tk()
(Pdb) next
> d:\work\python\widget-tour-py3\canvasruler.py(40)<module>()
-> STIPPLE_BITMAP = temp.tk.eval(
(Pdb) until 51
> d:\work\python\widget-tour-py3\canvasruler.py(51)<module>()
-> class RulerCanvas (Canvas):
(Pdb)
Third, I moved the set_trace() to line 50 and run again. This time I saw that
message appears in the cmd box.
D:\Temp\widget-tour-py3>python
Python 3.4.4 (v3.4.4:737efcadf5a6, Dec 20 2015, 19:28:18) [MSC v.1600 32
bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import canvasruler
> d:\work\python\widget-tour-py3\canvasruler.py(51)<module>()
-> class RulerCanvas (Canvas):
(Pdb) can't invoke "event" command: application has been destroyed
while executing
"event generate $w <<ThemeChanged>>"
(procedure "ttk::ThemeChanged" line 6)
invoked from within
"ttk::ThemeChanged"
(Pdb) list
46 TAB_NORMAL_STYLE = {'fill':'black', 'stipple':''}
47 TAB_INRANGE_STYLE = {'fill':'green', 'stipple':''}
48 TAB_OUTOFRANGE_STYLE = {'fill':'red', 'stipple':STIPPLE_BITMAP}
49
50 import pdb; pdb.set_trace()
51 -> class RulerCanvas (Canvas):
52
53 def __init__(self, master ):
54 Canvas.__init__(self, master, width=200+RULER_LENGTH,
height=100 )
55 self.draw_ruler()
56 self.draw_well()
(Pdb)
My problem is why the difference? and how to find out where that message comes
from?
PS. I also run this test under a Win8.1/64bit machine, get the same result.
PSS. I had scan files in the whole example directory and found there is
no any file using ttk module.
Right. I got this with IDLE tests before using ttk. Good luck tracing
this to its origin.
--
Terry Jan Reedy
--
https://mail.python.org/mailman/listinfo/python-list
