[Tutor] Is this a "Class" problem?

[Adrian Greyling]

Thanks for the response Jeff, although your answer has spawned another
question or two!  In your answer, you showed that the attribute "
MySecondFrame.text_ctrl_2" doesn't exist and to correct that, you suggested
the code below.  (What I understand from your response is that I can't
reference the original object, but I must create an instance of it.  Is that
right??)

    def MainToSecond(self, event): # wxGlade: MyMainFrame.<event_handler>

        m = MySecondFrame(self)
        m.Show()

        m.text_ctrl_2.SetValue("This text was generated from the 'MainFrame'
window")

Here's where I get fuzzy...  Let's say I've got a "frame_1" object
that opens a new "frame_2" object.  As you've suggested above, I'll use "m"
to create an instance of a frame object.  Now frame_2 opens a "dialog_1'"
which asks for information that is sent back to 'frame_2'. How do I
reference 'frame_2' in this case?  Especially when frame_2 hasn't been
closed and has just been waiting behind dialog_1 until dialog_1 closes.
When I try to reference it again as "m = frame_2(self)" from a new function
definition, aren't I creating a brand new frame_2 object that has "blank"
attributes, so to speak?

I'm sure I've made things clear as mud, but hopefully with my blathering,
someone will undertand my utter confusion!

Thanks everyone!
Adrian





On Mon, Aug 18, 2008 at 3:29 PM, Jeff Younker <jeff at drinktomi.com> wrote:

>   On Aug 18, 2008, at 9:13 AM, Adrian Greyling wrote:
>
>      def MainToSecond(self, event): # wxGlade: MyMainFrame.<event_handler>
>         MySecondFrame(self).Show()
>         MySecondFrame.text_ctrl_2.SetValue("This text was generated from
> the 'MainFrame' window")
>
>
> The expression MySecondFrame(self) creates a new object.  It
> initializes the new object by calling the MySecondFrame's __init__
> method.
>
>  class MySecondFrame(wx.Frame):
>      def __init__(self, *args, **kwds):
>         # begin wxGlade: MySecondFrame.__init__
> ...
>
>         self.text_ctrl_2 = wx.TextCtrl(self, -1, "",
> style=wx.TE_MULTILINE)
> ...
>
>
>
>  The __init__ method calls sets the variable text_ctrl_2 in the object
> m.
>
> Your function MainToSecond is trying to get the attribute
> MySecondFrame.text_ctrl_2.
> This attribute does not exist.  You want to get the attribute
> m.text_ctrl_2.  So, the method
> should be:
>
>      def MainToSecond(self, event): # wxGlade: MyMainFrame.<event_handler>
>         m = MySecondFrame(self)
>         m.Show()
>         m.text_ctrl_2.SetValue("This text was generated from the
> 'MainFrame' window")
>
>
> Also, method and function names should always start with a lower case
> letter: always
> mainToSecond and never MainToSecond
>
> -jeff
>
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