[Pythoncard-users] childWindow args

[Kevin A. <al...@ya...>]

I'm still not sure on the best way to deal with the
desire to pass args to a child window, but I would
like to propose one possible solution as well as
clarify some of the issues surrounding child windows.

As a test, I duplicated the minimal source and
resource and added the following test code.

    def on_initialize(self, event):
        print "child initialize"
    
    def postInit(self, a, b):
        print "postInit"
        print a, b

I modified the minimal sample by adding a button and
the following code to create the child window as well
as call an additional method once the other events
have fired by using wx.CallAfter.

    def on_btn_mouseClick(self, event):
        print "mouseClick"
        self.myChild = model.childWindow(self,
minchild.Minimal)
        wx.CallAfter(self.myChild.postInit, "hello",
2)

This appears to work as expected, but may not be what
Liam and others are looking for. I'll let them reply
with their current solutions and what they want.

model.childWindow is just a convenience function.

PythonCard does not use __init__ in user code since
that can be a dangerous place for user code as you
might try and access or modify controls or methods
that have not finished initializing in
wxWidgets/wxPython. Thus the initialize event has been
the way of doing initialization and the "event" is
supposed to fire after all other wx initialization is
done and the underlying control or window has
"settled", so it is safe to do whatever manipulations
you need. Furthermore, initialize is an event in an
attempt to be more consistent, but that means it only
has one argument, "event", just like all the other
events.

In the case of the childWindow function, the
initialize event that fires is disconnected from the
function call. Even if *args and **kwargs arguments
were used in the childWindow function I couldn't pass
them to initialize in a clean way. Making a separate
method call that you have control over when it happens
in relation to other events seems like the simplest
solution. Given that this might be a common need,
maybe we should have a PythonCard alias for
wx.CallAfter?

Additional thoughts? I can dig into this issue more
next week.

ka


		
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