336 lines
10 KiB
JavaScript
336 lines
10 KiB
JavaScript
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/*
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* @Author: hisense.wuhongjian
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* @Date: 2022-03-22 14:40:05
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* @LastEditors: hisense.wuhongjian
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* @LastEditTime: 2022-03-22 14:40:05
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* @Description: 告诉大家这是什么
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*/
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(function(factory, window) {
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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.tooltipLayout = factory(L);
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}
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})(function(L) {
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var TooltipLayout = {};
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// global variables
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let map;
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let markerList = []; // all markers here
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let polylineList = []; // all polylines here
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// events
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let _onPolylineCreated = null; // will be called after polyline has been created
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function initialize(leafletMap, onPolylineCreated) {
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map = leafletMap;
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polylineList = [];
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//default style
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if (onPolylineCreated) {
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_onPolylineCreated = onPolylineCreated;
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} else {
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_onPolylineCreated = ply => {
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ply.setStyle({
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color: '#90A4AE'
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});
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};
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}
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setRandomPos(map);
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layoutByForce();
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setEdgePosition();
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drawLine(map);
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// event registrations
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map.on('zoomstart', function() {
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removeAllPolyline(map);
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});
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map.on('zoomend', function() {
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setRandomPos(map);
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layoutByForce();
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setEdgePosition();
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drawLine(map);
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});
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map.on('dragend', function() {
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removeAllPolyline(map);
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setRandomPos(map);
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layoutByForce();
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setEdgePosition();
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drawLine(map);
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});
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map.on('resize', function() {
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removeAllPolyline(map);
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setRandomPos(map);
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layoutByForce();
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setEdgePosition();
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drawLine(map);
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});
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}
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function resetMarker(marker) {
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var name = marker.getTooltip().getContent();
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var options = marker.getTooltip().options;
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marker.unbindTooltip();
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marker.bindTooltip(name, {
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pane: options.pane,
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offset: options.offset,
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classname: 'heading',
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permanent: true,
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interactive: true,
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direction: 'left',
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sticky: 'none',
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opacity: options.opacity
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});
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markerList.push(marker);
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}
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function getMarkers() {
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return markerList;
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}
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function getLine(marker) {
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return marker.__ply;
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}
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function removeAllPolyline(map) {
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var i;
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for (i = 0; i < polylineList.length; i++) {
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map.removeLayer(polylineList[i]);
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}
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polylineList = [];
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}
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/**
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* Draw lines between markers and tooltips
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* @param map leaflet map
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*/
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function drawLine(map) {
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removeAllPolyline(map);
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for (var i = 0; i < markerList.length; i++) {
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var marker = markerList[i];
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var markerDom = marker._icon;
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var markerPosition = getPosition(markerDom);
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var label = marker.getTooltip();
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var labelDom = label._container;
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var labelPosition = getPosition(labelDom);
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var x1 = labelPosition.x;
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var y1 = labelPosition.y;
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var x = markerPosition.x;
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var y = markerPosition.y;
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x1 -= 5;
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y1 += 2;
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if (x1 - x !== 0 || y1 - y !== 0) {
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if (x1 + labelDom.offsetWidth < markerPosition.x) {
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x1 += labelDom.offsetWidth;
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}
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if (y1 + labelDom.offsetHeight < markerPosition.y) {
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y1 += labelDom.offsetHeight;
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}
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var lineDest = L.point(x1, y1);
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var destLatLng = map.layerPointToLatLng(lineDest);
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setTimeout(
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((marker, destLatLng) => () => {
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let ply = L.polyline([marker.getLatLng(), destLatLng]);
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_onPolylineCreated && _onPolylineCreated(ply);
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marker.__ply = ply;
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polylineList.push(ply);
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ply.addTo(map);
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})(marker, destLatLng),
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0
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);
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}
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}
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}
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function setRandomPos() {
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for (var i = 0; i < markerList.length; i++) {
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var marker = markerList[i];
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var label = marker.getTooltip();
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var labelDom = label._container;
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var markerDom = marker._icon;
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var markerPosition = getPosition(markerDom);
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// var angle = Math.floor(Math.random() * 19 + 1) * 2 * Math.PI / 20;
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var angle = ((2 * Math.PI) / 6) * i;
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var x = markerPosition.x;
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var y = markerPosition.y;
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var dest = L.point(
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Math.ceil(x + 50 * Math.sin(angle)),
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Math.ceil(y + 50 * Math.cos(angle))
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);
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L.DomUtil.setPosition(labelDom, dest);
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}
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}
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function scaleTo(a, b) {
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return L.point(a.x * b.x, a.y * b.y);
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}
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function normalize(a) {
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var l = a.distanceTo(L.point(0, 0));
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if (l === 0) {
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return a;
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}
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return L.point(a.x / l, a.y / l);
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}
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function fa(x, k) {
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return (x * x) / k;
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}
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function fr(x, k) {
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return (k * k) / x;
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}
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/**
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* get position form el.style.transform
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*/
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function getPosition(el) {
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var translateString = el.style.transform
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.split('(')[1]
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.split(')')[0]
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.split(',');
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return L.point(parseInt(translateString[0]), parseInt(translateString[1]));
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}
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/**
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* t is the temperature in the system
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*/
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function computePositionStep(t) {
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var area = (window.innerWidth * window.innerHeight) / 10;
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var k = Math.sqrt(area / markerList.length);
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var dpos = L.point(0, 0);
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var v_pos;
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var v;
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var i;
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for (i = 0; i < markerList.length; i++) {
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v = markerList[i];
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// get position of label v
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v.disp = L.point(0, 0);
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v_pos = getPosition(v.getTooltip()._container);
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// compute gravitational force
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for (var j = 0; j < markerList.length; j++) {
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var u = markerList[j];
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if (i !== j) {
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var u_pos = getPosition(u.getTooltip()._container);
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dpos = v_pos.subtract(u_pos);
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if (dpos !== 0) {
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v.disp = v.disp.add(
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normalize(dpos).multiplyBy(fr(dpos.distanceTo(L.point(0, 0)), k))
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);
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}
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}
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}
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}
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// compute force between marker and tooltip
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for (i = 0; i < markerList.length; i++) {
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v = markerList[i];
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v_pos = getPosition(v.getTooltip()._container);
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dpos = v_pos.subtract(getPosition(v._icon));
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v.disp = v.disp.subtract(
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normalize(dpos).multiplyBy(fa(dpos.distanceTo(L.point(0, 0)), k))
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);
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}
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// calculate layout
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for (i = 0; i < markerList.length; i++) {
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var disp = markerList[i].disp;
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var p = getPosition(markerList[i].getTooltip()._container);
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var d = scaleTo(
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normalize(disp),
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L.point(Math.min(Math.abs(disp.x), t), Math.min(Math.abs(disp.y), t))
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);
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p = p.add(d);
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p = L.point(Math.ceil(p.x), Math.ceil(p.y));
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L.DomUtil.setTransform(markerList[i].getTooltip()._container, p);
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}
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}
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function layoutByForce() {
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var start = Math.ceil(window.innerWidth / 10);
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var times = 50;
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var t;
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for (var i = 0; i < times; i += 1) {
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t = start * (1 - i / (times - 1));
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computePositionStep(t);
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}
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for (i = 0; i < markerList.length; i++) {
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var disp = markerList[i].disp;
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var p = getPosition(markerList[i].getTooltip()._container);
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var width = markerList[i].getTooltip()._container.offsetWidth;
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var height = markerList[i].getTooltip()._container.offsetHeight;
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p = L.point(Math.ceil(p.x - width / 2), Math.ceil(p.y - height / 2));
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L.DomUtil.setTransform(markerList[i].getTooltip()._container, p);
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}
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}
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function setEdgePosition() {
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var bounds = map.getBounds();
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var northWest = map.latLngToLayerPoint(bounds.getNorthWest());
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var southEast = map.latLngToLayerPoint(bounds.getSouthEast());
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for (let i = 0; i < markerList.length; i++) {
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var tooltip = getPosition(markerList[i].getTooltip()._container);
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var marker = getPosition(markerList[i]._icon);
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var width = markerList[i].getTooltip()._container.offsetWidth;
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var height = markerList[i].getTooltip()._container.offsetHeight;
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var isEdge = false;
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if (marker.x > northWest.x && tooltip.x < northWest.x) {
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tooltip.x = northWest.x;
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isEdge = true;
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} else if (marker.x < southEast.x && tooltip.x > southEast.x - width) {
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tooltip.x = southEast.x - width;
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isEdge = true;
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}
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if (marker.y > northWest.y && tooltip.y < northWest.y) {
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tooltip.y = northWest.y;
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isEdge = true;
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} else if (marker.y < southEast.y && tooltip.y > southEast.y - height) {
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tooltip.y = southEast.y - height;
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isEdge = true;
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}
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if (!isEdge) {
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if (marker.x < northWest.x && tooltip.x > northWest.x - width) {
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tooltip.x = northWest.x - width;
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} else if (marker.x > southEast.x && tooltip.x < southEast.x) {
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tooltip.x = southEast.x;
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}
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if (marker.y < northWest.y && tooltip.y > northWest.y - height) {
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tooltip.y = northWest.y - height;
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} else if (marker.y > southEast.y && tooltip.y < southEast.y) {
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tooltip.y = southEast.y;
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}
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}
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L.DomUtil.setTransform(markerList[i].getTooltip()._container, tooltip);
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}
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}
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TooltipLayout['initialize'] = initialize;
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TooltipLayout['resetMarker'] = resetMarker;
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TooltipLayout['getMarkers'] = getMarkers;
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TooltipLayout['getLine'] = getLine;
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TooltipLayout['removeAllPolyline'] = removeAllPolyline;
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return TooltipLayout;
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}, window);
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