[albatross-users] Oh, and another tricky one.. :)

[Andrew McNamara]

>I have a UserPage object which has a form for various
>actions etc and also has an image.
>
>If I set the form settings and then hit the 'submit' button,
>it calls the UserPage's page_process and decodes the form
>inputs and then calls it again for the img.
>
>The image doesnt get the form changes, but if I make the
>UserPage set a state variable with the form info, then 
>the UserPage/image call has access to the info.
>
>So it all works fine!! :^)

I had a similar problem with a frame based application. I did briefly
try using the RandomPage mixin, but eventually went back to having one
class for all frames (the frame URL simply includes a argument such as
"?detail=1").

The result isn't all it could be. I'm trying to think of a better
alternative.

>Thanks and sorry for the bandwidth. 

No problems there.

>(Now, I just need to change the Content-type type... :)

We have a suped-up version of the popview demo application that understands
MIME. It's capable of displaying images inline, and this requires setting
headers. To do this, I added some methods to the Context object:

    class PopviewAppContext(AppContext,
                            NameRecorderMixin,
                            SessionFileContextMixin,
                            logMixin.LogMixin):

        def __init__(self, app):
            AppContext.__init__(self, app)
            NameRecorderMixin.__init__(self)
            SessionFileContextMixin.__init__(self)
            self.set_mimetype()
            self.set_mimedisposition()

        def write_headers(self):
            SessionFileContextMixin.write_headers(self)
            self.request.write_header('Pragma', 'no-cache')
            self.request.write_header('Content-Type', self.mimetype)
            self.request.write_header('Content-Disposition', 
                                      self.mimedisposition)

        def set_mimetype(self, type = 'text/html'):
            self.mimetype = type

        def set_mimedisposition(self, disposition = 'inline', filename = None):
            if filename:
                self.mimedisposition = '%s; filename="%s"' % \
                    (disposition, filename.replace('_', '-'))
            else:
                self.mimedisposition = disposition


-- 
Andrew McNamara, Senior Developer, Object Craft
http://www.object-craft.com.au/