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Leaflet Choropleth チュートリアルがあれば、特定のマップ エリアでクリック イベントをエミュレートする必要があります。clickOnMapItem(itemId)例：次のコードで定義されたマップエリアをクリックするような関数が必要です

{"type":"Feature","id":"05","properties":{"name":"Arkansas","density":56.43},"geometry":{"type":"Polygon","coordinates":[...}

ここで、「id」:「05」はクリックする必要がある ID です

私のコードの残りの部分は、例のとおりです。

状態-data.js:

var statesData = {"type":"FeatureCollection","features":[
{"type":"Feature","id":"01","properties":{"name":"Alabama","density":94.65},"geometry":{"type":"Polygon","coordinates":[[[-87.359 and so on

html:

...ヘッダー省略

<!-- language:lang-html -->
    <body>
        <div id="map"></div>

        <script src="dist/leaflet.js"></script>

        <script type="text/javascript" src="us-states.js"></script>
        <script type="text/javascript" src="http://code.jquery.com/jquery-latest.min.js"></script>
        <script type="text/javascript">

            var map = L.map('map').setView([37.8, -96], 4);

            var cloudmade = L.tileLayer('http://{s}.tile.cloudmade.com/{key}/{styleId}/256/{z}/{x}/{y}.png', {
                attribution: 'Map data &copy; 2011 OpenStreetMap contributors, Imagery &copy; 2011 CloudMade',
                key: 'BC9A493B41014CAABB98F0471D759707',
                styleId: 22677
            }).addTo(map);


            // control that shows state info on hover
            var info = L.control();

            info.onAdd = function (map) {
                this._div = L.DomUtil.create('div', 'info');
                this.update();
                return this._div;
            };

            info.update = function (props) {
                this._div.innerHTML = '<h4>US Population Density</h4>' +  (props ?
                    '<b>' + props.name + '</b><br />' + props.density + ' people / mi<sup>2</sup>'
                    : 'Hover over a state');
            };

            info.addTo(map);


            // get color depending on population density value
            function getColor(d) {
                return d > 1000 ? '#800026' :
                       d > 500  ? '#BD0026' :
                       d > 200  ? '#E31A1C' :
                       d > 100  ? '#FC4E2A' :
                       d > 50   ? '#FD8D3C' :
                       d > 20   ? '#FEB24C' :
                       d > 10   ? '#FED976' :
                                  '#FFEDA0';
            }

            function style(feature) {
                return {
                    weight: 2,
                    opacity: 1,
                    color: 'white',
                    dashArray: '3',
                    fillOpacity: 0.7,
                    fillColor: getColor(feature.properties.density)
                };
            }
            //ON HOVER HANDLER
            function highlightFeature(e) {
                var layer = e.target;
                layer.setStyle({
                    weight: 5,
                    color: '#666',
                    dashArray: '',
                    fillOpacity: 0.7
                });

                if (!L.Browser.ie && !L.Browser.opera) {
                    layer.bringToFront();
                }

                info.update(layer.feature.properties);
            }

            var geojson;

            function resetHighlight(e) {
                geojson.resetStyle(e.target);
                info.update();
            }

            function zoomToFeature(e) {

                map.fitBounds(e.target.getBounds());
            }
            //setting click handlers
            function onEachFeature(feature, layer) {

                layer.on({
                    mouseover: highlightFeature,
                    mouseout: resetHighlight,
                    click: zoomToFeature
                });
            }

            geojson = L.geoJson(statesData, {
                style: style,
                onEachFeature: onEachFeature
            }).addTo(map);

            map.attributionControl.addAttribution('Population data &copy; <a href="http://census.gov/">US Census Bureau</a>');


            var legend = L.control({position: 'bottomright'});

            legend.onAdd = function (map) {

                var div = L.DomUtil.create('div', 'info legend'),
                    grades = [0, 10, 20, 50, 100, 200, 500, 1000],
                    labels = [],
                    from, to;

                for (var i = 0; i < grades.length; i++) {
                    from = grades[i];
                    to = grades[i + 1];

                    labels.push(
                        '<i style="background:' + getColor(from + 1) + '"></i> ' +
                        from + (to ? '&ndash;' + to : '+'));
                }

                div.innerHTML = labels.join('<br>');
                return div;
            };

            legend.addTo(map);


        </script>
    </body>

前もって感謝します！

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3 に答える 3