Awesome

Leaflet Panel Layers

Leaflet Control Layers extended with support groups and icons

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Tested in Leaflet v1.6.x

Demo:

opengeo.tech/maps/leaflet-panel-layers

Source code:

Github

Use Cases:

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