I use leaflet-angular-directive, i successfully display objects in table and map, although i achieved filtering through searching input only affect geojson objects in table.
My aim: make filtering through searching input affect geojson objects in table and map.
My Module
var AppMapDirectory = angular.module('DirectoryAppMap', ['ngResource', 'leaflet- directive']);
My Factory
AppMapDirectory.factory("Directory", function($resource) {
return $resource("json/result.json", {}, {
get: {
method: "GET",
cache: true
}
});
});
My Controller
AppMapDirectory.controller("DirectoryMapList", function($scope, Directory) {
Directory.get(function(data) {
$scope.hf_directory = data.features;
function onEachFeature(feature, layer) {
layer.bindPopup("<b>Wardname:</b> " + feature.properties.name +
"<br><b>Category:" + feature.properties.category + "");
}
angular.extend($scope, {
geojson: {
data: $scope.hf_directory,
onEachFeature: onEachFeature
}
});
});
angular.extend($scope, {
defaults: {
tileLayer: "https://dnv9my2eseobd.cloudfront.net/v3/foursquare.map-ikj05elx/{z}/{x}/{y}.png",
maxZoom: 14,
minZoom: 3
},
center: {
lat: 8.1238,
lng: 11.8777,
zoom: 2
}
});
});
My Template
<div ng-app="DirectoryAppMap" ng-controller="DirectoryMapList">
<ul>
<li><input ng-model="search.properties.name" placeholder="Name" ></li>
<li><input ng-model="search.properties.category" placeholder="Category"></li>
</ul>
<table>
<thead>
<tr>
<th>Name</th>
<th>Category</th>
</tr>
</thead>
<tbody>
<tr ng-repeat="hf in hf_directory| filter:search">
<td>{{ hf.properties.name }}</td>
<td>{{ hf.properties.category }}</td>
</tr>
</tbody>
</table>
<div leaflet id="map" center="center" defaults="defaults" geojson="geojson">
</div>
</div>
Maybe somebody could show me right direction so I know what I am doing wrong, I tried to bind search to leaflet on many different ways but without success, actually i think that it is not something that should be done on template side? But rather in options for geojson like filter? Is this the right thing to do now?
I used ng-repeat directive but then i had thousands of maps, maybe it is possible to use ng-repeat and still have only one map?
Here's an example of how to reflect searchresults in the geojson dataset, i've commented the code througout to explain some things since it's a rather large piece and understanding works best by example i think. So here it goes:
Controller HTML:
<leaflet geojson="geojson"></leaflet>
<input ng-model="search" />
<select multiple>
<option ng-repeat="feature in geojson.data.features">
{{feature.properties.NAME}}
</option>
</select>
Controller JS:
angular.module('app').controller('controller', [
'$scope',
'$http',
'$filter',
function ($scope, $http, $filter) {
// Declare empty search model
$scope.search = '';
// Declare empty geojson object
$scope.geojson = {};
// Fetch GeoJSON dataset
$http.get('stations.geojson').success(function (data) {
// Assign source data to scope
$scope.data = data;
// Assign same data to the geojson object
$scope.geojson.data = data;
});
// Start watching the search model
$scope.$watch('search', function (newVal, oldVal) {
// Watch gets fired on scope initialization and when empty so differentiate:
if (newVal !== oldVal && newVal !== '') {
// Has searchvalue, apply sourcedata, propertyname and searchstring to filter
// and assign return value of filter to geojson
$scope.geojson.data = $filter('filter')($scope.data, 'NAME', newVal);
} else {
// Search has been initialized or emptied, assign sourcedata to geojsonobject
$scope.geojson.data = $scope.data;
}
});
}
]);
Filter JS:
angular.module('app').filter('filter', [function() {
return function(geojson, searchProperty, searchValue) {
// Declare empty GeoJSON object to store found matches
var matches = {'type': 'FeatureCollection', 'features': []};
// Loop over source features
angular.forEach(geojson.features, function(featureObject, featureKey) {
// Make sure that the assigned searchproperty exists
if (featureObject.properties.hasOwnProperty(searchProperty)) {
// Source propertyvalue as lowercase;
var property = featureObject.properties[searchProperty].toLowerCase();
// Search propertyvalue as lowercase;
var search = searchValue.toLowerCase();
// Check if searchvalue exists in sourcevalue
if (property.indexOf(search) > -1) {
// Found match, push to new GeoJSON object
matches.features.push(featureObject);
}
}
});
// return GeoJSON object
return matches;
};
}]);
Hope that helps, here's a working example on Plunker: http://plnkr.co/edit/z02JyuGE0Y8EDrhOqzoQ?p=preview
After discussion in the comments about filtering on multiple properties i thought it might be handy to add that in an example, so assuming the geojson has a NAME and a LINE property:
Multiple inputs:
<input ng-model="search.NAME" />
<input ng-model="search.LINE" />
Change search property in scope to an object:
$scope.search = {
'NAME': '',
'LINE': ''
};
Modified watch function:
$scope.$watch('search', function (newVal, oldVal) {
// Protect against firing on initialization
if (!angular.equals(newVal, oldVal)) {
// Create copy of the sourcedata
var geojson = angular.copy($scope.data);
// Loop over search object
angular.forEach(newVal, function (value, property) {
// Only execute if value isn't empty
if (value !== '') {
// Apply filter and assign return data
geojson = $filter('filter')(geojson, property, value);
}
});
// Assign filtered geojson to geojson in scope
$scope.geojson.data = geojson;
// On initialization
} else {
// Assign unfiltered source data to geojson in scope
$scope.geojson.data = $scope.data;
}
// Enable deep watch because we're watching an object
}, true);
Here's the updated example on Plunker: http://plnkr.co/edit/OOx5DebtKXBfYqJ2Da3a?p=preview
