Jim,
I have checked your "cumulative" tutorial code on my computer, and I think
I know where the problem is. I was able to replicate the described
misbehavior and then to make a few corrections that restore nominal
functionality of the program both in Spyder and when run from the command
line.
The key observation is that your code does not work properly in Spyder
either: run it and look at the effect of checking/unchecking the toggle
menu item to make sure that there is none.
I think there are two issues with your code that are responsible for this
misbehavior, both in the definition of the toggle event handler. First, you
omitted parentheses in your calls to self.menuBar() method that returns the
app's menu bar object (if it has already been created, which is the case
here). Your calls self.statusBar.showMessage() and
self.statusBar.clearMessage() might do something weird and are unlikely to
have the intended effect. Second, you use methods showMessage() and
clearMessage() of the statusBar() object instead of show() and hide()
methods recommended by the tutorial. Adding parentheses and restoring the
tutorial-recommended methods - self.statusBar().show() and
self.statusBar().hide() - sufficed to make the program behave properly both
in Spyder and when run from the command line on my computer.
In fact, I would think of doing this check menu item exercise more along
line with the tutorial because their way looks more transparent to me. They
introduce self.statusbar reference to the self.statusBar() object upon its
creation (note 'b'/'B' alternation in the two identifiers), and then
operate with this reference, which eliminates subsequent calls to
statusBar() method and makes the code overall clearer and safer.
So, I think here are a couple of better changes to your code that have the
program work properly:
# constructor, replaces self.statusBar().showMessage('Ready')
self.statusbar = self.statusBar() #creates self.statusbar reference to
fresh new self.statusBar() object
self.statusbar.showMessage('Ready')
# toggle handler definition, replaces your initial code
if state:
self.statusbar.show()
else:
self.statusbar.hide()
The bottom line is that Spyder appears to be innocent with respect to this
issue. :)
Konstantin
On Sun, Aug 27, 2017 at 6:43 PM, jimmott via spyder <
[email protected]> wrote:
[...]
> def toggleMenu(self, state):
> if state:
> self.statusBar.showMessage()
> else:
> self.statusBar.clearMessage()
>
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