Problem Assigning members to XRC objects

Hi,

 

I'm successfully loading an XRC file that contains subclass entries. The
relevant classes contain member variables for elements within the XRC file,
such as: 

 

class SampleNotebookPage: public wxPanel

{

       wxDECLARE_DYNAMIC_CLASS(SampleNotebookPage);

 

public:

       SampleNotebookPage ();

 

       // Creation

       bool Create()

{

       tcAttributeValue = XRCCTRL(*this, "AttributeValue", wxTextCtrl);

tcAttributeValue->Connect(wxEVT_TEXT,
wxTextEventHandler(EBrailleRequiredMetaPage::OnTextChange));

.

};

       ~ SampleNotebookPage ();

.

wxTextCtrl * tcAttributeVallue;

}

 

I successfully initialize such members when I create an instance of the
class. However, though the handlers fire correctly, trying to reference one
of my member variables within the handler leads to exceptions. Here's an
example:

 

void EBrailleRequiredMetaPage::OnTextChange(wxCommandEvent& event)

{

              int id = event.GetId();

 

              if (id == XRCID("tcAttributeValue"))

       {

                      tcAttributeValue= XRCCTRL(*this, "tcAttributeValue",
wxTextCtrl);

                      

// Assertion here:

       if (tcAttributeValue->GetValue().Trim().IsEmpty())

       {

              .

       }

       else

       {

.

       }

       }

}

 

If I try to access the member directly:

 

tcTitle->GetValue();

 

I get an exception.

 

What am I missing here, as I thought I was following all of the examples
I've found.

 

Many thanks in advance.

 

Tim

 

 

 

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