[wxFileDialog] Adding controls

[Mario Figueiredo]

Hello all,

One of the things I would like to offer my users was a slightly altered
wxFileDialog under the Windows implementation. On my case I would need this
new class to include an extra wxTextCtrl and code the functionality to go
with it.

Creating a new dialog where I insert a wxGenericDirCtrl is not to my liking
since this radically alters the dialog aspect. I would prefer, as seen on
some applications, the exact same look and feel of the standard wxFileDialog
under Windows, but with an added element; the aforementioned wxTextCtrl at
the bottom of the window.

Can I reach this functionality with the help of wxWidgets object framework
or do I have to go deeper?

In case you are wondering, the text control would optionally accept a
checksum and the file to be opened would be validated against this checksum
on wxID_OK. Private member variables and their public assessors would reveal
the result of the validation routine:

TheNewFileDialog foo( /*...*/);

if (foo.ShowModal() =3D=3D wxID_OK) {
    if ( foo.Crc() && foo.IsValid() ) {
        /*...*/
    } else {
        /*...*/
    }
}
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