leaflet-draw

Vector drawing plugin for Leaflet

npm install leaflet-draw
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Important

Leaflet.draw 0.2.3+ requires Leaflet 0.7 or higher.

Leaflet.draw

Adds support for drawing and editing vectors and markers on Leaflet maps. Check out the demo.

Upgrading from Leaflet.draw 0.1

Leaflet.draw 0.2.0 changes a LOT of things from 0.1. Please see BREAKING CHANGES for how to upgrade.

Table of Contents

Using the plugin
Advanced Options
Common tasks
Thanks

Using the plugin

The default state for the control is the draw toolbar just below the zoom control. This will allow map users to draw vectors and markers. Please note the edit toolbar is not enabled by default.

To add the draw toolbar set the option drawControl: true in the map options.

// create a map in the "map" div, set the view to a given place and zoom
var map = L.map('map', {drawControl: true}).setView([51.505, -0.09], 13);

// add an OpenStreetMap tile layer
L.tileLayer('http://{s}.tile.osm.org/{z}/{x}/{y}.png', {
    attribution: '&copy; <a href="http://osm.org/copyright">OpenStreetMap</a> contributors'
}).addTo(map);

Adding the edit toolbar

To use the edit toolbar you must initialise the Leaflet.draw control and manually add it to the map.

// create a map in the "map" div, set the view to a given place and zoom
var map = L.map('map').setView([51.505, -0.09], 13);

// add an OpenStreetMap tile layer
L.tileLayer('http://{s}.tile.osm.org/{z}/{x}/{y}.png', {
    attribution: '&copy; <a href="http://osm.org/copyright">OpenStreetMap</a> contributors'
}).addTo(map);

// Initialise the FeatureGroup to store editable layers
var drawnItems = new L.FeatureGroup();
map.addLayer(drawnItems);

// Initialise the draw control and pass it the FeatureGroup of editable layers
var drawControl = new L.Control.Draw({
    edit: {
        featureGroup: drawnItems
    }
});
map.addControl(drawControl);

The key here is the featureGroup option. This tells the plugin which FeatureGroup contains the layers that should be editable.

Events

Once you have successfully added the Leaflet.draw plugin to your map you will want to respond to the different actions users can initiate. The following events will be triggered on the map:

draw:created

Property Type Description
layer Polyline/Polygon/Rectangle/Circle/Marker Layer that was just created.
layerType String The type of layer this is. One of: polyline, polygon, rectangle, circle, marker

Triggered when a new vector or marker has been created.

map.on('draw:created', function (e) {
    var type = e.layerType,
        layer = e.layer;

    if (type === 'marker') {
        // Do marker specific actions
    }

    // Do whatever else you need to. (save to db, add to map etc)
    map.addLayer(layer);
});

draw:edited

Property Type Description
layers LayerGroup List of all layers just edited on the map.

Triggered when layers in the FeatureGroup, initialised with the plugin, have been edited and saved.

map.on('draw:edited', function (e) {
    var layers = e.layers;
    layers.eachLayer(function (layer) {
        //do whatever you want, most likely save back to db
    });
});

draw:deleted

Triggered when layers have been removed (and saved) from the FeatureGroup.

Property Type Description
layers LayerGroup List of all layers just removed from the map.

draw:drawstart

Triggered when the user has chosen to draw a particular vector or marker.

Property Type Description
layerType String The type of layer this is. One of: polyline, polygon, rectangle, circle, marker

draw:drawstop

Triggered when the user has finished a particular vector or marker.

Property Type Description
layerType String The type of layer this is. One of: polyline, polygon, rectangle, circle, marker

draw:editstart

Triggered when the user starts edit mode by clicking the edit tool button.

Property Type Description
handler String The type of edit this is. One of: edit

draw:editstop

Triggered when the user has finshed editing (edit mode) and saves edits.

Property Type Description
handler String The type of edit this is. One of: edit

draw:deletestart

Triggered when the user starts remove mode by clicking the remove tool button.

Property Type Description
handler String The type of edit this is. One of: remove

draw:deletestop

Triggered when the user has finished removing shapes (remove mode) and saves.

Property Type Description
handler String The type of edit this is. One of: remove

Advanced options

You can configure the plugin by using the different options listed here.

Control.Draw

These options make up the root object that is used when initialising the Leaflet.draw control.

Option Type Default Description
position String 'topleft' The initial position of the control (one of the map corners). See control positions.
draw DrawOptions {} The options used to configure the draw toolbar.
edit EditOptions false The options used to configure the edit toolbar.

DrawOptions

These options will allow you to configure the draw toolbar and its handlers.

Option Type Default Description
polyline PolylineOptions { } Polyline draw handler options. Set to false to disable handler.
polygon PolygonOptions { } Polygon draw handler options. Set to false to disable handler.
rectangle RectangleOptions { } Rectangle draw handler options. Set to false to disable handler.
circle CircleOptions { } Circle draw handler options. Set to false to disable handler.
marker MarkerOptions { } Marker draw handler options. Set to false to disable handler.

Draw handler options

The following options will allow you to configure the individual draw handlers.

PolylineOptions

Polyline and Polygon drawing handlers take the same options.

Option Type Default Description
allowIntersection Bool true Determines if line segments can cross.
drawError Object See code Configuration options for the error that displays if an intersection is detected.
guidelineDistance Number 20 Distance in pixels between each guide dash.
shapeOptions Leaflet Polyline options See code The options used when drawing the polyline/polygon on the map.
metric Bool true Determines which measurement system (metric or imperial) is used.
zIndexOffset Number 2000 This should be a high number to ensure that you can draw over all other layers on the map.
repeatMode Bool false Determines if the draw tool remains enabled after drawing a shape.

PolygonOptions

Polygon options include all of the Polyline options plus the option to show the approximate area.

Option Type Default Description
showArea Bool false Show the area of the drawn polygon in m², ha or km². The area is only approximate and become less accurate the larger the polygon is.

RectangleOptions

Option Type Default Description
shapeOptions Leaflet Path options See code The options used when drawing the rectangle on the map.
repeatMode Bool false Determines if the draw tool remains enabled after drawing a shape.

CircleOptions

Option Type Default Description
shapeOptions Leaflet Path options See code The options used when drawing the circle on the map.
repeatMode Bool false Determines if the draw tool remains enabled after drawing a shape.

MarkerOptions

Option Type Default Description
icon Leaflet Icon L.Icon.Default() The icon displayed when drawing a marker.
zIndexOffset Number 2000 This should be a high number to ensure that you can draw over all other layers on the map.
repeatMode Bool false Determines if the draw tool remains enabled after drawing a shape.

EditOptions

These options will allow you to configure the draw toolbar and its handlers.

Option Type Default Description
featureGroup Leaflet FeatureGroup null This is the FeatureGroup that stores all editable shapes. THIS IS REQUIRED FOR THE EDIT TOOLBAR TO WORK
edit EditHandlerOptions { } Edit handler options. Set to false to disable handler.
remove DeleteHandlerOptions { } Delete handler options. Set to false to disable handler.

EditHandlerOptions

Option Type Default Description
selectedPathOptions Leaflet Path options See code The path options for how the layers will look while in edit mode. If this is set to null the editable path options will not be set.

DeleteHandlerOptions

Option Type Default Description

Customizing language and text in Leaflet.draw

Leaflet.draw uses the L.drawLocal configuration object to set any text used in the plugin. Customizing this will allow support for changing the text or supporting another language.

See Leaflet.draw.js for the default strings.

E.g.

// Set the button title text for the polygon button
L.drawLocal.draw.toolbar.buttons.polygon = 'Draw a sexy polygon!';

// Set the tooltip start text for the rectangle
L.drawLocal.draw.handlers.rectangle.tooltip.start = 'Not telling...';

Common tasks

The following examples outline some common tasks.

Example Leaflet.draw config

The following example will show you how to:

  1. Change the position of the control's toolbar.
  2. Customize the styles of a vector layer.
  3. Use a custom marker.
  4. Disable the delete functionality.
var cloudmadeUrl = 'http://{s}.tile.cloudmade.com/BC9A493B41014CAABB98F0471D759707/997/256/{z}/{x}/{y}.png',
    cloudmade = new L.TileLayer(cloudmadeUrl, {maxZoom: 18}),
    map = new L.Map('map', {layers: [cloudmade], center: new L.LatLng(-37.7772, 175.2756), zoom: 15 });

var editableLayers = new L.FeatureGroup();
map.addLayer(editableLayers);

var MyCustomMarker = L.Icon.extend({
    options: {
        shadowUrl: null,
        iconAnchor: new L.Point(12, 12),
        iconSize: new L.Point(24, 24),
        iconUrl: 'link/to/image.png'
    }
});

var options = {
    position: 'topright',
    draw: {
        polyline: {
            shapeOptions: {
                color: '#f357a1',
                weight: 10
            }
        },
        polygon: {
            allowIntersection: false, // Restricts shapes to simple polygons
            drawError: {
                color: '#e1e100', // Color the shape will turn when intersects
                message: '<strong>Oh snap!<strong> you can\'t draw that!' // Message that will show when intersect
            },
            shapeOptions: {
                color: '#bada55'
            }
        },
        circle: false, // Turns off this drawing tool
        rectangle: {
            shapeOptions: {
                clickable: false
            }
        },
        marker: {
            icon: new MyCustomMarker()
        }
    },
    edit: {
        featureGroup: editableLayers, //REQUIRED!!
        remove: false
    }
};

var drawControl = new L.Control.Draw(options);
map.addControl(drawControl);

map.on('draw:created', function (e) {
    var type = e.layerType,
        layer = e.layer;

    if (type === 'marker') {
        layer.bindPopup('A popup!');
    }

    drawnItems.addLayer(layer);
});

Disabling a toolbar

If you do not want a particular toolbar in your app you can turn it off by setting the toolbar to false.

var drawControl = new L.Control.Draw({
    draw: false,
    edit: {
        featureGroup: editableLayers
    }
});

Disabling a toolbar item

If you want to turn off a particular toolbar item, set it to false. The following disables drawing polygons and markers. It also turns off the ability to edit layers.

var drawControl = new L.Control.Draw({
    draw: {
        polygon: false,
        marker: false
    },
    edit: {
        featureGroup: editableLayers,
        edit: false
    }
});

Changing a drawing handlers options

You can change a draw handlers options after initialisation by using the setDrawingOptions method on the Leaflet.draw control.

E.g. to change the colour of the rectangle:

drawControl.setDrawingOptions({
    rectangle: {
        shapeOptions: {
            color: '#0000FF'
        }
    }
});

Creating a custom build

If you only require certain handlers (and not the UI), you may wish to create a custom build. You can generate the relevant jake command using the build html file.

See edit handlers example which uses only the edit handlers.

Thanks

Thanks so much to @brunob, @tnightingale, and @shramov. I got a lot of ideas from their Leaflet plugins.

All the contributors and issue reporters of this plugin rock. Thanks for tidying up my mess and keeping the plugin on track.

The icons used for some of the toolbar buttons are either from http://glyphicons.com/ or inspired by them. <3 Glyphicons!

Finally, @mourner is the man! Thanks for dedicating so much of your time to create the gosh darn best JavaScript mapping library around.

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