DeveloperGuidelines

= GIS Module =

== How to add a new Layer type ==

=== Model ===
{{{models/_gis.py}}}
{{{
gis_layer_types=['newlayertype','...']

# Provide layer-specific options in it's own table:
db.define_table('gis_layer_newlayertype',
				SQLField('modified_on','datetime',default=now),
				SQLField('layer',length=64),
				SQLField('field'))
db.gis_layer_newlayertype.layer.requires=IS_IN_DB(db,'gis_layer.uuid','gis_layer.name')
}}}

=== Controller ===
{{{controllers/gis.py}}}
{{{
def update_layer():
    # If form needs populating:
    elif type=="newlayertype":
        field = [""]
        subtype=0
        options_subtype = [""]
        key=0
    form=FORM(
        INPUT(_name="field"), # Could also be a SELECT
    )
    if form.accepts(request.vars,session,keepvalues=True):
        elif type_new=="newlayertype":
            db(db['gis_layer_%s' % type_new].layer==t2.id).select()[0].update_record(
    		field=form.vars.field
    	    )

def map_service_catalogue():
    form=FORM(
        INPUT(_name="field"), # Could also be a SELECT
    )
    if form.accepts(request.vars,session,keepvalues=True):
        elif type_new=="newlayertype":
            db['gis_layer_%s' % type_new].insert(
                layer=id,
                field=form.vars.field
            )
}}}
If loading custom JS files when the new Layer is active:
{{{
def map_viewing_client():
}}}
=== View ===
{{{views/gis/map_service_catalogue.html}}}
{{{
<tr><td><label>{{=T("field_label")}}</label></td>
<td><input name="field" type="text" value="" />
{{if form.errors.field:}}<div class="error">{{=form.errors.field}}</div>{{pass}}</td></tr>
}}}
{{{static/scripts/gis_layers.js}}}
{{{

}}}
{{{views/gis/map_viewing_client.html}}}


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DeveloperGuidelines