Re: Trouble calling method from one class to another class

John, thank you for those comments. I've looked at the __init__ docs and
have adjusted accordingly.

One comment re the TreeCtrl __init__: I see in some examples I have looked
at that they don't include all the parameters and their code runs without
giving any errors. For example, this website:
https://www.geeksforgeeks.org/wxpython-treectrl/

I don't understand why their codding example runs without error as they
have omitted the style, validator and name. In any event, I followed your
advice and patterned my __init__ after the options shown in the docs.
However, I did make one exception: I omitted the TreeCtrl validator
argument as I don't think I need it in the __init__. The line seems to
execute OK without and I still am not sure it's optional as the __init__
docs show it in there. So I guess it is optional? Geeksforgeeks omitted
three of the arguments and I didn't get any errors when I ran their example
code.

I'm attaching pyCode4.py as the update with my changes (based on your
comments).

> At this point I stopped because the GUI opened and I'm not sure what you
are trying to d.
At this point, I am just trying to execute the file without getting the
error: AttributeError: type object 'CoreFrame' has no attribute 'tab_num'
on line 78.
Then I want to click on any tree node just to fire the add_tab_page()
method and see that a new tab page is created.


On Sat, Apr 24, 2021 at 3:43 PM john fabiani <[email protected]> wrote:

> Take my advise with a smile because I am NOT the best programmer.  But, I
> have to say this is some very confusing code pxCore2.py.  I believe you do
> not have a handle on how OOP works within python. Also you copied code
> directly out of the wxPython demo but lacked the understanding of what was
> being presented.  And I bet this is causing confusion and is also not
> allowing you to move forward.
>
> When you define a class, you don't normally create an instance of the
> class within the definition of the class.
>
> self._MyTreeCtrl = MyTreeCtrl is in the __init__ method of MyTreeCtrl.
>
> so comment out "self._MyTreeCtrl = MyTreeCtrl"
>
> I believe with wxPython 4.x the super() is used.
>
> so
>
> wx.TreeCtrl.__init__(self, parent, id, position, size, style)
>
> is now
>
> super().__init__(parent, id = id, pos= position, size = size, style=style)
>
> You can review the what is needed to init wx.TreeCtrl by looking at the
> method in the source code.  In this case there are two signatures:
>
>  TreeCtrl()
>
> or  TreeCtrl(parent, id=ID_ANY, pos=DefaultPosition, size=DefaultSize,
> style=TR_DEFAULT_STYLE, validator=DefaultValidator, name=TreeCtrlNameStr)
>
> Therefore, depending on your needs you could just use:
>
> super().__init__()
>
> At this point I stopped because the GUI opened and I'm not sure what you
> are trying to do.  If it is to list a directory there is a widget called
> 'FileDialog'.
>
> Johnf
>
>
>
>
>
> On 4/24/21 10:01 AM, RF wrote:
>
>
> I'm attaching my small demo test app. I'm having a heck of a time figuring
> out how to call add_tab_page() from the MyTreeCtrl class. This should
> happen when I just click on a tree node. While this doesn't seem to make
> any sense, what I plan to do with this action is open a new notebook tab
> and load in the filename into the new tab. But I have to get past this
> first: being able to call the add_tab_page() from the MyTreeCtrl class.
>
> I'm fairly sure I'm missing something small here.
>
> Thank you for any help.
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-- 
Ralph Freshour

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