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173 lines
7.9 KiB
173 lines
7.9 KiB
(function(factory, window){
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"use strict";
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if (typeof define === 'function' && define.amd) {
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define(['leaflet'], factory);
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} else if (typeof exports === 'object') {
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module.exports = factory(require('leaflet'));
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}
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if (typeof window !== 'undefined' && window.L) {
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window.L.Ruler = factory(L);
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}
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}(function (L) {
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"use strict";
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L.Control.Ruler = L.Control.extend({
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options: {
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position: 'topright',
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circleMarker: {
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color: 'red',
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radius: 2
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},
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lineStyle: {
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color: 'red',
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dashArray: '1,6'
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},
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lengthUnit: {
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display: 'km',
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decimal: 2,
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factor: null,
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label: '距离:'
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},
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angleUnit: {
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display: '°',
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decimal: 2,
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factor: null,
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label: '方位:'
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}
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},
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onAdd: function(map) {
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this._map = map;
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this._container = L.DomUtil.create('div', 'leaflet-bar');
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this._container.classList.add('leaflet-ruler');
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L.DomEvent.disableClickPropagation(this._container);
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L.DomEvent.on(this._container, 'click', this._toggleMeasure, this);
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this._choice = false;
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this._defaultCursor = this._map._container.style.cursor;
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this._allLayers = L.layerGroup();
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return this._container;
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},
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onRemove: function() {
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L.DomEvent.off(this._container, 'click', this._toggleMeasure, this);
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},
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_toggleMeasure: function() {
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this._choice = !this._choice;
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this._clickedLatLong = null;
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this._clickedPoints = [];
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this._totalLength = 0;
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if (this._choice){
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this._map.doubleClickZoom.disable();
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L.DomEvent.on(this._map._container, 'keydown', this._escape, this);
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L.DomEvent.on(this._map._container, 'dblclick', this._closePath, this);
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this._container.classList.add("leaflet-ruler-clicked");
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this._clickCount = 0;
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this._tempLine = L.featureGroup().addTo(this._allLayers);
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this._tempPoint = L.featureGroup().addTo(this._allLayers);
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this._pointLayer = L.featureGroup().addTo(this._allLayers);
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this._polylineLayer = L.featureGroup().addTo(this._allLayers);
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this._allLayers.addTo(this._map);
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this._map._container.style.cursor = 'crosshair';
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this._map.on('click', this._clicked, this);
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this._map.on('mousemove', this._moving, this);
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}
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else {
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this._map.doubleClickZoom.enable();
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L.DomEvent.off(this._map._container, 'keydown', this._escape, this);
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L.DomEvent.off(this._map._container, 'dblclick', this._closePath, this);
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this._container.classList.remove("leaflet-ruler-clicked");
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this._map.removeLayer(this._allLayers);
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this._allLayers = L.layerGroup();
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this._map._container.style.cursor = this._defaultCursor;
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this._map.off('click', this._clicked, this);
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this._map.off('mousemove', this._moving, this);
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}
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},
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_clicked: function(e) {
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this._clickedLatLong = e.latlng;
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this._clickedPoints.push(this._clickedLatLong);
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L.circleMarker(this._clickedLatLong, this.options.circleMarker).addTo(this._pointLayer);
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if(this._clickCount > 0 && !e.latlng.equals(this._clickedPoints[this._clickedPoints.length - 2])){
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if (this._movingLatLong){
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L.polyline([this._clickedPoints[this._clickCount-1], this._movingLatLong], this.options.lineStyle).addTo(this._polylineLayer);
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}
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var text;
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this._totalLength += this._result.Distance;
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if (this._clickCount > 1){
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text = '<b>' + this.options.angleUnit.label + '</b> ' + this._result.Bearing.toFixed(this.options.angleUnit.decimal) + ' ' + this.options.angleUnit.display + '<br><b>' + this.options.lengthUnit.label + '</b> ' + this._totalLength.toFixed(this.options.lengthUnit.decimal) + ' ' + this.options.lengthUnit.display;
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}
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else {
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text = '<b>' + this.options.angleUnit.label + '</b> ' + this._result.Bearing.toFixed(this.options.angleUnit.decimal) + ' ' + this.options.angleUnit.display + '<br><b>' + this.options.lengthUnit.label + '</b> ' + this._result.Distance.toFixed(this.options.lengthUnit.decimal) + ' ' + this.options.lengthUnit.display;
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}
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L.circleMarker(this._clickedLatLong, this.options.circleMarker).bindTooltip(text, {permanent: true, className: 'result-tooltip'}).addTo(this._pointLayer).openTooltip();
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}
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this._clickCount++;
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},
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_moving: function(e) {
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if (this._clickedLatLong){
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L.DomEvent.off(this._container, 'click', this._toggleMeasure, this);
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this._movingLatLong = e.latlng;
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if (this._tempLine){
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this._map.removeLayer(this._tempLine);
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this._map.removeLayer(this._tempPoint);
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}
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var text;
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this._addedLength = 0;
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this._tempLine = L.featureGroup();
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this._tempPoint = L.featureGroup();
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this._tempLine.addTo(this._map);
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this._tempPoint.addTo(this._map);
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this._calculateBearingAndDistance();
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this._addedLength = this._result.Distance + this._totalLength;
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L.polyline([this._clickedLatLong, this._movingLatLong], this.options.lineStyle).addTo(this._tempLine);
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if (this._clickCount > 1){
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text = '<b>' + this.options.angleUnit.label + '</b> ' + this._result.Bearing.toFixed(this.options.angleUnit.decimal) + ' ' + this.options.angleUnit.display + '<br><b>' + this.options.lengthUnit.label + '</b> ' + this._addedLength.toFixed(this.options.lengthUnit.decimal) + ' ' + this.options.lengthUnit.display + '<br><div class="plus-length">(+' + this._result.Distance.toFixed(this.options.lengthUnit.decimal) + ')</div>';
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}
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else {
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text = '<b>' + this.options.angleUnit.label + '</b> ' + this._result.Bearing.toFixed(this.options.angleUnit.decimal) + ' ' + this.options.angleUnit.display + '<br><b>' + this.options.lengthUnit.label + '</b> ' + this._result.Distance.toFixed(this.options.lengthUnit.decimal) + ' ' + this.options.lengthUnit.display;
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}
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L.circleMarker(this._movingLatLong, this.options.circleMarker).bindTooltip(text, {sticky: true, offset: L.point(0, -40) ,className: 'moving-tooltip'}).addTo(this._tempPoint).openTooltip();
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}
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},
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_escape: function(e) {
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if (e.keyCode === 27){
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if (this._clickCount > 0){
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this._closePath();
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}
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else {
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this._choice = true;
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this._toggleMeasure();
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}
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}
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},
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_calculateBearingAndDistance: function() {
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var f1 = this._clickedLatLong.lat, l1 = this._clickedLatLong.lng, f2 = this._movingLatLong.lat, l2 = this._movingLatLong.lng;
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var toRadian = Math.PI / 180;
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// haversine formula
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// bearing
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var y = Math.sin((l2-l1)*toRadian) * Math.cos(f2*toRadian);
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var x = Math.cos(f1*toRadian)*Math.sin(f2*toRadian) - Math.sin(f1*toRadian)*Math.cos(f2*toRadian)*Math.cos((l2-l1)*toRadian);
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var brng = Math.atan2(y, x)*((this.options.angleUnit.factor ? this.options.angleUnit.factor/2 : 180)/Math.PI);
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brng += brng < 0 ? (this.options.angleUnit.factor ? this.options.angleUnit.factor : 360) : 0;
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// distance
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var R = this.options.lengthUnit.factor ? 6371 * this.options.lengthUnit.factor : 6371; // kilometres
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var deltaF = (f2 - f1)*toRadian;
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var deltaL = (l2 - l1)*toRadian;
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var a = Math.sin(deltaF/2) * Math.sin(deltaF/2) + Math.cos(f1*toRadian) * Math.cos(f2*toRadian) * Math.sin(deltaL/2) * Math.sin(deltaL/2);
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var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a));
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var distance = R * c;
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this._result = {
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Bearing: brng,
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Distance: distance
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};
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},
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_closePath: function() {
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this._map.removeLayer(this._tempLine);
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this._map.removeLayer(this._tempPoint);
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this._choice = false;
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L.DomEvent.on(this._container, 'click', this._toggleMeasure, this);
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this._toggleMeasure();
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}
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});
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L.control.ruler = function(options) {
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return new L.Control.Ruler(options);
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};
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}, window));
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