Re: Re: How to implement a dropdownlist in CherryPy where selected item is returned as argument appended to current URL?

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Jibun no Kage wrote:
> Below is a link that illustrates my point about how more than just=20
> straight HTML is used...
> https://css-tricks.com/unobtrusive-page-changer/

I disagree violently.=C2=A0 The drop-down list in that example is nothing b=
ut=20
pure HTML.=C2=A0 When the submit button is clicked, it sends a URL back to=
=20
the server.=C2=A0 The acts on the URL just like it does for every other=20
request.=C2=A0 What do you see as special in that example?

I also have to disagree with the wording on that page.=C2=A0 What he calls=
=20
the "obtrusive way" is handled entirely in the browser. Everything takes=20
place locally, with no additional network traffic.=C2=A0 What he calls the=
=20
"unobtrusive way" requires an extra and totally unnecessary round-trip=20
back to the web server, just so it can send a header to force the=20
browser to do the exact same thing that one line of Javascript was doing.


> No one, that I have seen so far, appears to do a drop down list with=20
> just straight HTML, that responds on selection completion of an item,=20
> which is what I was looking for.

The straight HTML example you cited does not do that, either.=C2=A0 It=20
requires the user to click the "submit" button.=C2=A0 The modified version =
at=20
the bottom is using Javascipt plus jQuery plus that extra server=20
round-trip to accomplish what the first example did with a single line=20
of code.=C2=A0 The final product there is worse than the original example i=
n=20
every conceivable way.=C2=A0 It requires more Javascript code on the page, =
it=20
requires you to load jQuery in the page, and it requires an extra server=20
round-trip.=C2=A0 I can't tell what they were trying to prove here, but the=
y=20
failed to do so.


> Clearly, CherryPy has no native hook or method to do this, per the=20
> past discussion thus far.

And neither does PHP.


> This reliance on Java or PHP as the above link references, provides=20
> the event logic.

You do understand that Java and Javascript are not related in any way,=20
don't you?=C2=A0 The page you cited shows three lines of PHP running on the=
=20
server.=C2=A0 ALL of the other code there is Javascript that gets sent with=
=20
the HTML and executed in the browser, and would be present regardless of=20
the language used on the server. Do you understand that the chunk of=20
code that starts "$(function() {" is Javascript and not PHP?

If you are looking for the CherryPy equivalent to the three lines of PHP=20
code on that page, that's easy enough:

 =C2=A0=C2=A0=C2=A0 @cherrypy.expose
 =C2=A0=C2=A0=C2=A0 def number( self, nav=3DNone ):
 =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 if nav:
 =C2=A0 =C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 cherrypy.response=
.headers['Location'] =3D nav


> Our project design is 100% python and within the CherryPy=20
> environment.=C2=A0 To add just one drop down list... we have to add an=20
> additional language?=C2=A0 Be it Java, PHP, or whatever, It appears that =
is=20
> the case.

No, I think you are confused about which code is running where.

--=20
Tim Roberts, [email protected]
Providenza & Boekelheide, Inc.


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