Created
April 2, 2012 23:51
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Numbered Markers in Leaflet (JS Mapping)
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.leaflet-div-icon { | |
background: transparent; | |
border: none; | |
} | |
.leaflet-marker-icon .number{ | |
position: relative; | |
top: -37px; | |
font-size: 12px; | |
width: 25px; | |
text-align: center; | |
} |
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L.NumberedDivIcon = L.Icon.extend({ | |
options: { | |
// EDIT THIS TO POINT TO THE FILE AT http://www.charliecroom.com/marker_hole.png (or your own marker) | |
iconUrl: '<%= image_path("leaflet/marker_hole.png") %>', | |
number: '', | |
shadowUrl: null, | |
iconSize: new L.Point(25, 41), | |
iconAnchor: new L.Point(13, 41), | |
popupAnchor: new L.Point(0, -33), | |
/* | |
iconAnchor: (Point) | |
popupAnchor: (Point) | |
*/ | |
className: 'leaflet-div-icon' | |
}, | |
createIcon: function () { | |
var div = document.createElement('div'); | |
var img = this._createImg(this.options['iconUrl']); | |
var numdiv = document.createElement('div'); | |
numdiv.setAttribute ( "class", "number" ); | |
numdiv.innerHTML = this.options['number'] || ''; | |
div.appendChild ( img ); | |
div.appendChild ( numdiv ); | |
this._setIconStyles(div, 'icon'); | |
return div; | |
}, | |
//you could change this to add a shadow like in the normal marker if you really wanted | |
createShadow: function () { | |
return null; | |
} | |
}); |
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//Make sure you downloaded the image file in numbered_markers.js | |
//Note that the text could also be letters instead of numbers if that's more appropriate | |
var marker = new L.Marker(new L.LatLng(0, 0), { | |
icon: new L.NumberedDivIcon({number: '1'}) | |
}); |
excellent and thank you for sharing
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Thanks. FYI, I'm finding the .number div element for the number text introduces an issue meeting WCAG 2.0 success criteria:
The "background behind the text" in this case is transparent, and only the loaded icon image provides contrast for the text.
Do you have any suggestion?