leaflet-multicontrol

L.multiControl

Leaflet plugin to implements layers control with multiple functionality such as opacity, color, bringToFront, bringToBack, zoomToLayer, delete and legend.

DEMO

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Requirements

• Leaflet
• Font Awesome

This plugin require font awesome library to display icons in buttons.

Install

NPM

npm i leaflet-multicontrol

Supported features

• L.marker
• L.polygon
• L.GeoJSON

If you want to add support to specific feature please let me know in an issue or pull request.

Usage Example

An easy way to implement layers control with multiple functionality. This plugin detects layer properties and will displays buttons (inputs) depend on it.

Create features

const marker = L.marker([51.5, -0.09]).addTo(map);
const marker2 = L.marker([51.51, -0.09]);
const marker3 = L.marker([51.52, -0.09]);
const polygon = L.polygon([[51.51, -0.1],[51.5, -0.08],[51.53, -0.07],[51.50, -0.06]], {color: '#FF0000'}).addTo(map);
const polygon2 = L.polygon([[51.51, -0.1],[51.5, -0.08],[51.53, -0.07],[51.50, -0.06]], {color: '#0122FF'}).addTo(map);

const mylines = [{
    "type": "LineString",
    "coordinates": [[-0.1,51.51], [-0.07,51.53]]
}, {
    "type": "LineString",
    "coordinates": [[-0.1,51.5], [-0.07,51.50]]
}];
const geojson = L.geoJSON(null).addTo(map);
geojson.addData(mylines);

const states = [{
    "type": "Feature",
    "properties": {"party": "Republican"},
    "geometry": {
        "type": "Polygon",
        "coordinates": [[
            [-104.05, 48.99],
            [-97.22,  48.98],
            [-96.58,  45.94],
            [-104.03, 45.94],
            [-104.05, 48.99]
        ]]
    }
}, {
    "type": "Feature",
    "properties": {"party": "Democrat"},
    "geometry": {
        "type": "Polygon",
        "coordinates": [[
            [-109.05, 41.00],
            [-102.06, 40.99],
            [-102.03, 36.99],
            [-109.04, 36.99],
            [-109.05, 41.00]
        ]]
    }
}, {
    "type": "Feature",
    "properties": {"party": "Democrat"},
    "geometry": {
        "type": "Polygon",
        "coordinates": [[
            [-109.05, 41.00],
            [-102.06, 40.99],
            [-102.03, 36.99],
            [-109.04, 36.99],
            [-109.05, 41.00]
        ]]
    }
}];

const geojsonStates = L.geoJSON(states, {style: function(state) {
    return (state.properties.party === 'Republican') 
            ? {fillColor:'red', color:'red', opacity:1, legendLabel: state.properties.party} : {fillColor:'blue', color:'blue', opacity:1, legendLabel: state.properties.party}
}}).addTo(map);

Implements

const overlays = [
    {name: 'Marker', layer: marker},
    {name: 'Marker2', layer: marker2},
    {name: 'polygon', layer: polygon},
    {name: 'polygon2', layer: polygon2},
    {name: 'geojson', layer: geojson},
    {name: 'geojsonStates', layer: geojsonStates},
];

const legend = L.multiControl(overlays, {position:'topright', label: 'Control de capas'}).addTo(map);

Note: If you have a geojson with classification representation (such as example "geojsonStates") and you want visualize it in legend, you should add "legendLabel" property in L.path config that are included in style function.

L.multiControl receives two arguments:

• The first is an array of overlays objects
• The second is an object with control options

Overlay config

Property	Type	Required	Description
name	String	true	Name of the layer.
layer	Leaflet layer	true	A leaflet layer included in Supported features

Options

Option	Type	Default	Description
position	String	'topright'	Position of the control. Options: leaflet control positions
label	String	'Layer Control'	Label that will be display in the header

Methods

Method	Description
toggle()	Method to collapse / expand the control
addOverlay(overlay config)	Method to add Overlay into control

Rules

• Layers names must be unique