[feature] add map to admin's change list (WIP - DO NOT MERGE)

[olivierdalang]

Hi,

This PR allows to display a map at top of admin's change list of LeafletGeoAdmins.

It's a quick draft and I'm new to Django, so it's not ready for merge and needs review.

Please let me know what you think.

Features

• single click : user can select entries both on the map and on the list (synced)
• double click : opens the entry's change page.

How it works

It works by setting LeafletGeoAdmin's change_list_template to a custom template which features a map before the list.
The map knows which field to use to display the features thanks to a new list_geom_field parameter on LeafletGeoAdmin. By default, it's set to None, in which case no map is displayed.

How to use

class MyAdmin(LeafletGeoAdmin):
    ...
    list_geom_field = 'mygeomfieldname'
    ...

To do

• Test without grappelli
• Add a visible message when not all entities are show (pagination)
• Allow click to work when show for a raw foreign key lookup
• Cleanup the selection hack (so that it works with select all for instance)
• Allow to completely replace the change list
• Support of labels, popups, etc.
• Customise click events
• One day : display inlines as a map too
• One day : allow to edit in place

[leplatrem]

Since this is a rather radical change, I would do another admin class instead, at least the time to stabilize the whole thing

[kosner]

Hi,
This file "admin_list_leaflet" haven’t in the commit and templatetags. Where does it come from? I am interested in this feature, it’s a good idea.
Thanks

[olivierdalang]

Hi,
I'm not sure anymore (didn't look at it for some time), maybe it was a mistake ? did you try to remove that line ?

[kosner]

I just doing the test,

• I with an error : 'admin_list_leaflet' is not a valid tag library: Template library admin_list_leaflet not found, tried
• Without no menus and no layer