<!DOCTYPE html>
<html>
<head>
<title>Add an area</title>
<script src="js/jquery.min.js"></script>
<link rel="stylesheet" href="css/leaflet.css" />
<script src="js/leaflet.js"></script>
</head>
<body>
<div id="map" style="width: 600px; height: 400px"></div><br />
<input type="button" onclick="drawArea();" value="Draw an area" /> <input type="button" onclick="resetArea();" value="Clear map" /><br />
<p>To add an area point click on the map. To remove an area point click on it again.</p>
<form action="addareadb.php" method="post">
<h1>Add a new area</h1>
<table cellpadding="5" cellspacing="0" border="0">
<tbody>
<tr align="left" valign="top">
<td align="left" valign="top">Area name</td>
<td align="left" valign="top"><input type="text" name="area" /></td>
</tr>
<tr align="left" valign="top">
<td align="left" valign="top">Geographic locations</td>
<td align="left" valign="top"><textarea id="geo" name="geo"></textarea>
<br /><input type="button" onclick="getGeoPoints();" value="Collect points" /></td>
</tr>
<tr align="left" valign="top">
<td align="left" valign="top">Keywords</td>
<td align="left" valign="top"><textarea name="keywords"></textarea></td>
</tr>
<tr align="left" valign="top">
<td align="left" valign="top"></td>
<td align="left" valign="top"><input type="submit" value="Save"></td>
</tr>
</tbody>
</table>
</form>
<script>
var map = L.map('map').setView([51.505, -0.09], 13);
var polygon;
var draggableAreaMarkers = new Array();
L.tileLayer( 'https://api.mapbox.com/styles/v1/mapbox/streets-v10/tiles/{z}/{x}/{y}?access_token=pk.eyJ1IjoibWVnYTYzODIiLCJhIjoiY2ozbXpsZHgxMDAzNjJxbndweDQ4am5mZyJ9.uHEjtQhnIuva7f6pAfrdTw', {
maxZoom: 18,
attribution: 'Map data © <a href="http://openstreetmap.org/"> OpenStreetMap </a> contributors, ' +
'<a href="http://creativecommons.org/"> CC-BY-SA </a>, ' +
'Imagery ? <a href="http://mapbox.com"> Mapbox </a>',
id: 'examples.map-i875mjb7'
}).addTo(map);
function resetArea() {
if(polygon != null) {
map.removeLayer( polygon );
}
for(i=0; i < draggableAreaMarkers.length; i++) {
map.removeLayer( draggableAreaMarkers[i] );
}
draggableAreaMarkers = new Array();
}
function addMarkerAreaPoint(latLng) {
var areaMarker = L.marker( [latLng.lat, latLng.lng], { draggable: true, zIndexOffset: 900 }).addTo(map);
areaMarker.arrayId = draggableAreaMarkers.length;
areaMarker.on('click', function() {
map.removeLayer( draggableAreaMarkers[ this.arrayId ]);
draggableAreaMarkers[ this.arrayId ] = "";
});
draggableAreaMarkers.push( areaMarker );
}
function drawArea() {
if(polygon != null) {
map.removeLayer( polygon );
}
var latLngAreas = new Array();
for(i=0; i < draggableAreaMarkers.length; i++) {
if(draggableAreaMarkers[ i ]!="") {
latLngAreas.push( L.latLng( draggableAreaMarkers[ i ].getLatLng().lat, draggableAreaMarkers[ i ].getLatLng().lng));
}
}
if(latLngAreas.length > 1) {
// create a blue polygon from an array of LatLng points
polygon = L.polygon( latLngAreas, {color: 'blue'}).addTo(map);
}
if(polygon != null) {
// zoom the map to the polygon
map.fitBounds( polygon.getBounds() );
}
}
function getGeoPoints() {
var points = new Array();
for(var i=0; i < draggableAreaMarkers.length; i++) {
if(draggableAreaMarkers[i] != "") {
points[i] = draggableAreaMarkers[ i ].getLatLng().lng + "," + draggableAreaMarkers[ i ].getLatLng().lat;
}
}
$('#geo').val(points.join(','));
}
$( document ).ready(function() {
map.on('click', function(e) {
addMarkerAreaPoint( e.latlng);
});
});
</script>
</body>
</html>
|
Download
