[英]Given the following Leaflet.Draw example on Plunker, how would I catch the rectangle created event and action on it?
Plunker示例: 帶有OSM映射的Leaflet Draw插件
var osmUrl = 'http://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png',
osmAttrib = '© <a href="http://openstreetmap.org/copyright">OpenStreetMap</a> contributors',
osm = L.tileLayer(osmUrl, { maxZoom: 18, attribution: osmAttrib });
var map = new L.Map('leaflet', { layers: [osm], center: new L.LatLng(52.105289405897, 5.2629891004852425), zoom: 13 });
console.log('map ready');
var drawnItems = new L.FeatureGroup();
var coords = [new L.latLng(51.2, 4.5), new L.latLng(51.2, 4.6), new L.latLng(51.2, 4.9)];
var poly = new L.Polyline(coords, {
color: 'blue',
opacity: 1,
weight: 5
});
drawnItems.addLayer(poly);
map.addLayer(drawnItems);
var drawControl = new L.Control.Draw({
draw: {
position: 'right',
polygon: {
title: 'Polygon',
allowIntersection: false,
drawError: {
color: '#b00b00',
timeout: 1000
},
shapeOptions: {
color: '#bada55'
},
showArea: true
},
polyline: {
metric: false
},
circle: {
shapeOptions: {
color: '#662d91'
}
}
},
edit: {
featureGroup: drawnItems
}
});
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);
console.log('adding layer', layer, drawnItems);
});
我需要捕獲一個創建的矩形,並最終從其坐標中生成一個文件,但是現在,我試圖弄清楚如何捕獲事件並將矩形坐標輸出到控制台。
原諒我,仍然步入Javascript。 謝謝
-編輯-因此,我看到了如何將此事件記錄到控制台,但是我不清楚如何從事件訪問緯度/經度信息。
map.on('draw:rectangle-created', function (e) {
console.log(e.rectangle-created);
});
只需使用draw:created
事件並檢查type是否為矩形:
map.on('draw:created', function (e) {
var type = e.layerType,
layer = e.layer;
if (type === 'rectangle') {
// It's a rectangle, do stuff
console.log(layer.getLatLngs());
}
drawnItems.addLayer(layer);
console.log('adding layer', layer, drawnItems);
});
您可以通過調用getLatLngs
方法來訪問矩形的坐標。 它返回L.LatLng
對象的數組:
rectangle.getLatLngs().forEach(function (latlng) {
console.log(latlng.lat); //latitude
console.log(latlng.lng); //longitude
});
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