Leaflet Control Layers extended with support groups and icons
Copyright Stefano Cudini
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Tested in Leaflet v1.6.x
Demo:
opengeo.tech/maps/leaflet-panel-layers
Source code:
Use Cases:
- Interactive tool by researchers from the Australian Antarctic Division
- EnviroMap by EnvironSensing
- Leaflet Control Search (Official demos)
- Pine Interactive Map
Options
| Option | Default | Description |
|---|---|---|
| compact | false | panel height minor of map height |
| collapsed | false | panel collapsed at startup |
| autoZIndex | true | set zindex layer by order definition |
| collapsibleGroups | false | groups of layers is collapsible by button |
| groupCheckboxes | false | adds a checkbox to the group title to de-/select all layers in the group |
| selectorGroup | false | select all layer of a group |
| buildItem | null | function that return row item html node(or html string) |
| title | '' | title of panel |
| className | '' | additional class name for panel |
| position | 'topright' | position of control |
Events
| Event | Data | Description |
|---|---|---|
| 'panel:selected' | {layerDef} | fired after moved and show markerLocation |
| 'panel:unselected' | {} | fired after control was expanded |
Methods
| Method | Arguments | Description |
|---|---|---|
| addBaseLayer() | layerDef,group,collapsed | add new layer item definition to panel as baselayers |
| addOverlay() | 'Text message' | add new layer item definition to panel as overlay |
| removeLayer() | 'Text searched' | remove layer item from panel |
| configToControlLayers() | 'Text searched' | convert config from Control.PanelLayers to Control.Layers |
Usage
Panel Item Definition formats
{ name: "Bar", icon: iconByName('bar'), layer: L.geoJson(Bar, {pointToLayer: featureToMarker }) }
definition in JSON format permit to store simply the configuration type contains a Leaflet method in this case L.geoJson() args is the arguments passed to the method: L.geoJson(river)
{ layer: { type: "geoJson", args: [ river ] }, }
definition of a group
{ group: "Title Group", collapsed: true, layers: [ ...other items... ] }
Multiple active layers with icons
var baseLayers = [ { active: true, name: "OpenStreetMap", layer: L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png') } ]; var overLayers = [ { name: "Drinking Water", icon: '<i class="icon icon-water"></i>', layer: L.geoJson(WaterGeoJSON) }, { active: true, name: "Parking", icon: '<i class="icon icon-parking"></i>', layer: L.geoJson(ParkingGeoJSON) } ]; map.addControl( new L.Control.PanelLayers(baseLayers, overLayers) );
Build panel layers from pure JSON Config
var panelJsonConfig = { "baselayers": [ { "active": true, "name": "Open Cycle Map", "layer": { "type": "tileLayer", "args": [ "https://{s}.tile.opencyclemap.org/cycle/{z}/{x}/{y}.png" ] } }, { "name": "Landscape", "layer": { "type": "tileLayer", "args": [ "https://{s}.tile3.opencyclemap.org/landscape/{z}/{x}/{y}.png" ] } }, { "name": "Transports", "layer": { "type": "tileLayer", "args": [ "https://{s}.tile2.opencyclemap.org/transport/{z}/{x}/{y}.png" ] } } ], "overlayers": [ { "name": "Terrain", "layer": { "type": "tileLayer", "args": [ "https://toolserver.org/~cmarqu/hill/{z}/{x}/{y}.png", { "opacity": 0.5 } ] } } ] }; L.control.panelLayers(panelJsonConfig.baseLayers, panelJsonConfig.overLayers).addTo(map);
Grouping of layers
L.control.panelLayers( [ { name: "Open Street Map", layer: osmLayer }, { group: "Walking layers", layers: [ { name: "Open Cycle Map", layer: L.tileLayer('https://{s}.tile.opencyclemap.org/cycle/{z}/{x}/{y}.png') }, { name: "Hiking", layer: L.tileLayer("https://toolserver.org/tiles/hikebike/{z}/{x}/{y}.png") } ] }, { group: "Road layers", layers: [ { name: "Transports", layer: L.tileLayer("https://{s}.tile2.opencyclemap.org/transport/{z}/{x}/{y}.png") } ] } ], {collapsibleGroups: true} ).addTo(map);
Collapse some layers' groups
L.control.panelLayers([ { name: "Open Street Map", layer: osmLayer }, { group: "Walking layers", layers: [ { name: "Open Cycle Map", layer: L.tileLayer('https://{s}.tile.opencyclemap.org/cycle/{z}/{x}/{y}.png') }, { name: "Hiking", layer: L.tileLayer("https://toolserver.org/tiles/hikebike/{z}/{x}/{y}.png") } ] }, { group: "Road layers", collapsed: true, layers: [ { name: "Transports", layer: L.tileLayer("https://{s}.tile2.opencyclemap.org/transport/{z}/{x}/{y}.png") } ] } ]).addTo(map);
Add layers dynamically at runtime
var panel = L.control.panelLayers(); $.getJSON('some/url/path.geojson', function(data){ panel.addOverlay({ name: "Drinking Water", icon: '<i class="icon icon-water"></i>', layer: L.geoJson(data) }); });
Build
This plugin support Grunt for building process. Therefore the deployment require NPM installed in your system. After you've made sure to have npm working, run this in command line:
npm install grunt
