leaflet.styledlayercontrol

Leaflet.StyledLayerControl
===================

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A Leaflet plugin that implements the management and control of layers by organization into categories or groups. The StyledLayerControl class extends the original L.control.layers control.
The plugin uses HTML5 and CSS3 to style the presentation in a modern way.
The initial ideas were based in the plugin: Leaflet.Groupedlayercontrol

!preview

Tested with Leaflet 0.7.3

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- Organization of the layers into groups or categories. The layers can be an overlay or basemap
- Groups may appear initially expanded or not
- Groups can be opened exclusively
- A layer can be defined as removable
- The main container control behaves responsively, automatically adjusting the vertical resizing the map and the screen

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- A map using StyledLeafletControl - not exclusive group select
- A map using StyledLeafletControl with exclusive group select

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1 - Create the reference to Leaflet
``javascript


`

2 - Insert references to styledLayerControl.css and styledLayerControl.js
`javascript


`

3 - Define your layers (base maps and overlays)
`javascript

// Google layers
var g_roadmap = new L.Google('ROADMAP');
var g_satellite = new L.Google('SATELLITE');
var g_terrain = new L.Google('TERRAIN');

// OSM layers
var osmUrl='http://{s}.tile.osm.org/{z}/{x}/{y}.png';
var osmAttrib='Map data © OpenStreetMap contributors';
var osm = new L.TileLayer(osmUrl, {attribution: osmAttrib});

// ... more Base Maps

// Sao Paulo Soybeans Plant
var soybeans_sp = new L.LayerGroup();
L.marker([-22, -49.80]).addTo(soybeans_sp),
L.marker([-23, -49.10]).addTo(soybeans_sp),
L.marker([-21, -49.50]).addTo(soybeans_sp);

// Rio de Janeiro Corn Plant
var corn_rj = new L.LayerGroup();
L.marker([-22, -43.20]).addTo(corn_rj),
L.marker([-23, -43.50]).addTo(corn_rj);

// ... more Overlays
`

4 - Create the Leaflet Map Object and add the layer that will be default basemap
`javascript
var map = L.map('map', {
center: [-16, -54],
zoom: 4
});

map.addLayer(g_roadmap);
`

5 - Define structure of groups and layers of basemap
`javascript
var baseMaps = [
{
groupName : "Google Base Maps",
expanded : true,
layers : {
"Satellite" : g_satellite,
"Road Map" : g_roadmap,
"Terreno" : g_terrain
}
}, {
groupName : "OSM Base Maps",
layers : {
"OpenStreetMaps" : osm
}
}, {
groupName : "Bing Base Maps",
layers : {
"Satellite" : bing1,
"Road" : bing2
}
}
];
`

5 - Define structure of groups and layers of overlays
`javascript
var overlays = [
{
groupName : "Sao Paulo",
expanded : true,
layers : {
"Soybeans Plant" : soybeans_sp,
"Corn Plant" : corn_sp
}
}, {
groupName : "Rio de Janeiro",
expanded : true,
layers : {
"Bean Plant" : bean_rj,
"Corn Plant" : corn_rj,
"Rice Plant" : rice_rj
}
}, {
groupName : "Belo Horizonte",
layers : {
"Sugar Cane Plant" : sugar_bh,
"Corn Plant" : corn_bh
}
}
];
`

6 - Declare which layers can be deleted and visible (create the removable property with true in the options StyledLayerControl that can be created in the layer object).
Each layer declared as removable = true will show an icon to delete the user to remove the layer
`javascript
soybeans_sp.StyledLayerControl = {
removable : true,
visible : false
}
// ... more layers
`

7 - Define the options for StyledLayerControl
- container_width - define the main container width - the default is automatic width
- container_maxHeight - define the max height to the main container - the default is automatic depending of map and screen height
- group_maxHeight - define the max height space of group container - the default is 100px
- exclusive - define that the opened group is exclusive

- All the properties are optional
- You can also include all properties available under "Options" of control L.control.layers in the same list

`javascript
var options = {
container_width : "300px",
container_maxHeight : "350px",
group_maxHeight : "80px",
exclusive : false
};
`

8 - Create the StyledLayerControl
`javascript
var control = L.Control.styledLayerControl(baseMaps, overlays, options);
map.addControl(control);
`

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- To add a new base layer dynamically, simply use addBaseLayer and declare that the group layer will belong.
Also note that to add a new group, simply specify a group name that does not exist yet, and a new group will be created.
`javascript
control.addBaseLayer( bing1, "Bing Satellite", {groupName : "Bing Maps", expanded: true} );
control.addBaseLayer( bing2, "Bing Road", {groupName : "Bing Maps"} );
`

- To add a new overlay layer dynamically, simply declare the group that de layer will belong.
`javascript
control.addOverlay( corn_bh, "Corn Plant", {groupName : "Belo Horizonte"} );
`

- To remove a layer dynamically, specify the instance variable of the layer using the method removeLayer. (the method ignore the removable property of layers )
`javascript
control.removeLayer( corn_sp );
`

- To remove a group, specify the name of the group in the removeGroup method.
By doing so all layers belonging to the group will also be excluded
`javascript
control.removeGroup( "Rio de Janeiro");
`

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- To force select a layer dynamically, simply use selectLayer function like this :
`javascript
control.selectLayer( corn_sp );
`

- So.. to un-select the layer :
`javascript
control.unSelectLayer( corn_sp );
`

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- To force select all layer of a group, use like this :
`javascript
control.selectGroup( "Rio de Janeiro" );
`

- So.. to un-select the all layer of group :
`javascript
control.unSelectGroup( "Rio de Janeiro" );
``

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This work is licensed under a Creative Commons Attribution 3.0 Unported License.