Re: [pmapper-users] dynamic legend, forcing refresh on pmapper 2.1.1

[Keith B. <kbo...@gm...>]

Hi Armin,

I had read through that thread on the list, and am in the same spot
Stephan got to with defGroupList not defined, and as I looked at
resolving my issue, it seemed I was essentially going through the
steps of completely reloading the map. That's when I got discouraged
and thought I'd check with the list..I was hoping someone on the list
had gotten all the way through to a solution they were happy with.

Of course it's my problem, and I have to solve it, I was just hoping
someone might have a flash of insight :) My understanding of the
legend code is rather muddled.

thank for the pointer though,
-Keith


On 12/4/06, Armin Burger <arm...@gm...> wrote:
> Keith
>
> try to use as a starting point this topic from the mailing list:
>
> http://www.mail-archive.com/pma...@li.../msg00494.html
>
> There is an attached PHP script for adding layers dynamically and the
> explanations for it is in a mail later in that posting. They are
> hopefully possible to understand.
>
> armin
>
> Keith Boyle wrote:
> > Sorry for my delayed response, and as always thank you for the reply.
> > I should have been more complete in describing what I'm up to, dynamic
> > legends is too vague. Please forgive me if the following is too
> > detailed:
> >
> > I'm implementing user created layers in postgres/postgis, allowing the
> > user to create certain combinations of existing layers
> > (intersections), distance envelopes (buffers) around selected classes
> > of selected layers, and even uploading some basic data to create new
> > points/shapes.
> >
> > I've set up two tables for describing layers, a 'layers' table and a
> > 'classes' table that are read after the map file is read. Then through
> > php/mapscript I'm adding the layers to the map created by the map
> > file.
> >
> > All this I'm making progress on, but getting the legend to show the
> > new layers I've added via mapscript is really eluding me. For now, I'm
> > reloading the entire map.phtml page after the user creates a new
> > layer. This works but seems very 'heavy handed' and not very elegant.
> > If there is a better way, I'd love to go that path instead.
> >
> > Please let me know if you have any suggestions or pointers, I've dug
> > through the code base but haven't found a solution to my issue that
> > behaves well...
> >
> > again, as always, many thanks Armin for a great baseline from which to
> > build!
> > -Keith
> >
> >
> > On 12/1/06, Armin Burger <arm...@gm...> wrote:
> >> what do you mean exactly with 'dynamic legends'?
> >>
> >> In the current implementation you have the possibility to combine both
> >> TOC and legend, typically in a foldable tree structure. Then the
> >> legend icons are never updated. Or you swap between TOC and legedn
> >> view, then the legend just shows the icons of the visible layers.
> >>
> >> *Real* dynamic legends with displaying only the icons of visible
> >> classes on the current map extent are something I would like to have
> >> but this would require a base function available via Mapscript.
> >>
> >> armin
> >
>