leaflet热力图(三)：鼠标悬浮显示热力数据

[mwjuan]

在上一节的基础上，增加鼠标悬浮显示热力值的功能

let point = [lat,lng];
var tooltip = window.RUNTIME.L.tooltip({
      direction: 'top', //悬浮框显示位置，top：坐标点上方，bottom：下，left：左，right：右
      opacity: 0.8,  //悬浮框透明度
      className: 'leaflet-label'   //css样式文件中的名称，用来自定义悬浮框样式
})
tooltip.setContent(`人数：${p.length}人`);   //显示内容
tooltip.setLatLng(new window.RUNTIME.L.LatLng(point[0], point[1]));  //设置悬浮坐标位置
				
//将tooltip添加到map中
window.RUNTIME.L.tooltip(tooltip, map);
//响应鼠标滑入滑出事件
map.on('mouseover', e => {
       map.openTooltip(tooltip);  //显示tooltip
})

map.on('mouseout', e => {
	map.closeTooltip(tooltip); //关闭tooltip
})

修改引入的leaflet.css文件，将默认样式(悬浮框中的三角形)改为与自定义相匹配的样式

/* required styles */

.leaflet-pane,
.leaflet-tile,
.leaflet-marker-icon,
.leaflet-marker-shadow,
.leaflet-tile-container,
.leaflet-pane>svg,
.leaflet-pane>canvas,
.leaflet-zoom-box,
.leaflet-image-layer,
.leaflet-layer {
	position: absolute;
	left: 0;
	top: 0;
}

.leaflet-container {
	overflow: hidden;
}

.leaflet-tile,
.leaflet-marker-icon,
.leaflet-marker-shadow {
	-webkit-user-select: none;
	-moz-user-select: none;
	user-select: none;
	-webkit-user-drag: none;
}

/* Safari renders non-retina tile on retina better with this, but Chrome is worse */
.leaflet-safari .leaflet-tile {
	image-rendering: -webkit-optimize-contrast;
}

/* hack that prevents hw layers "stretching" when loading new tiles */
.leaflet-safari .leaflet-tile-container {
	width: 1600px;
	height: 1600px;
	-webkit-transform-origin: 0 0;
}

.leaflet-marker-icon,
.leaflet-marker-shadow {
	display: block;
}

/* .leaflet-container svg: reset svg max-width decleration shipped in Joomla! (joomla.org) 3.x */
/* .leaflet-container img: map is broken in FF if you have max-width: 100% on tiles */
.leaflet-container .leaflet-overlay-pane svg,
.leaflet-container .leaflet-marker-pane img,
.leaflet-container .leaflet-shadow-pane img,
.leaflet-container .leaflet-tile-pane img,
.leaflet-container img.leaflet-image-layer {
	max-width: none !important;
}

.leaflet-container.leaflet-touch-zoom {
	-ms-touch-action: pan-x pan-y;
	touch-action: pan-x pan-y;
}

.leaflet-container.leaflet-touch-drag {
	-ms-touch-action: pinch-zoom;
}

.leaflet-container.leaflet-touch-drag.leaflet-touch-zoom {
	-ms-touch-action: none;
	touch-action: none;
}

.leaflet-tile {
	filter: inherit;
	visibility: hidden;
}

.leaflet-tile-loaded {
	visibility: inherit;
}

.leaflet-zoom-box {
	width: 0;
	height: 0;
	-moz-box-sizing: border-box;
	box-sizing: border-box;
	z-index: 800;
}

/* workaround for https://bugzilla.mozilla.org/show_bug.cgi?id=888319 */
.leaflet-overlay-pane svg {
	-moz-user-select: none;
}

.leaflet-pane {
	z-index: 400;
}

.leaflet-tile-pane {
	z-index: 200;
}

.leaflet-overlay-pane {
	z-index: 400;
}

.leaflet-shadow-pane {
	z-index: 500;
}

.leaflet-marker-pane {
	z-index: 600;
}

.leaflet-tooltip-pane {
	z-index: 650;
}

.leaflet-popup-pane {
	z-index: 700;
}

.leaflet-map-pane canvas {
	z-index: 100;
}

.leaflet-map-pane svg {
	z-index: 200;
}

.leaflet-vml-shape {
	width: 1px;
	height: 1px;
}

.lvml {
	behavior: url(#default#VML);
	display: inline-block;
	position: absolute;
}


/* control positioning */

.leaflet-control {
	position: relative;
	z-index: 800;
	pointer-events: visiblePainted;
	/* IE 9-10 doesn't have auto */
	pointer-events: auto;
}

.leaflet-top,
.leaflet-bottom {
	position: absolute;
	z-index: 1000;
	pointer-events: none;
}

.leaflet-top {
	top: 0;
}

.leaflet-right {
	right: 0;
}

.leaflet-bottom {
	bottom: 0;
}

.leaflet-left {
	left: 0;
}

.leaflet-control {
	float: left;
	clear: both;
}

.leaflet-right .leaflet-control {
	float: right;
}

.leaflet-top .leaflet-control {
	margin-top: 10px;
}

.leaflet-bottom .leaflet-control {
	margin-bottom: 10px;
}

.leaflet-left .leaflet-control {
	margin-left: 10px;
}

.leaflet-right .leaflet-control {
	margin-right: 10px;
}


/* zoom and fade animations */

.leaflet-fade-anim .leaflet-tile {
	will-change: opacity;
}

.leaflet-fade-anim .leaflet-popup {
	opacity: 0;
	-webkit-transition: opacity 0.2s linear;
	-moz-transition: opacity 0.2s linear;
	-o-transition: opacity 0.2s linear;
	transition: opacity 0.2s linear;
}

.leaflet-fade-anim .leaflet-map-pane .leaflet-popup {
	opacity: 1;
}

.leaflet-zoom-animated {
	-webkit-transform-origin: 0 0;
	-ms-transform-origin: 0 0;
	transform-origin: 0 0;
}

.leaflet-zoom-anim .leaflet-zoom-animated {
	will-change: transform;
}

.leaflet-zoom-anim .leaflet-zoom-animated {
	-webkit-transition: -webkit-transform 0.25s cubic-bezier(0, 0, 0.25, 1);
	-moz-transition: -moz-transform 0.25s cubic-bezier(0, 0, 0.25, 1);
	-o-transition: -o-transform 0.25s cubic-bezier(0, 0, 0.25, 1);
	transition: transform 0.25s cubic-bezier(0, 0, 0.25, 1);
}

.leaflet-zoom-anim .leaflet-tile,
.leaflet-pan-anim .leaflet-tile {
	-webkit-transition: none;
	-moz-transition: none;
	-o-transition: none;
	transition: none;
}

.leaflet-zoom-anim .leaflet-zoom-hide {
	visibility: hidden;
}


/* cursors */

.leaflet-interactive {
	cursor: pointer;
}

.leaflet-grab {
	cursor: -webkit-grab;
	cursor: -moz-grab;
}

.leaflet-crosshair,
.leaflet-crosshair .leaflet-interactive {
	cursor: crosshair;
}

.leaflet-popup-pane,
.leaflet-control {
	cursor: auto;
}

.leaflet-dragging .leaflet-grab,
.leaflet-dragging .leaflet-grab .leaflet-interactive,
.leaflet-dragging .leaflet-marker-draggable {
	cursor: move;
	cursor: -webkit-grabbing;
	cursor: -moz-grabbing;
}

/* marker & overlays interactivity */
.leaflet-marker-icon,
.leaflet-marker-shadow,
.leaflet-image-layer,
.leaflet-pane>svg path,
.leaflet-tile-container {
	pointer-events: none;
}

.leaflet-marker-icon.leaflet-interactive,
.leaflet-image-layer.leaflet-interactive,
.leaflet-pane>svg path.leaflet-interactive {
	pointer-events: visiblePainted;
	/* IE 9-10 doesn't have auto */
	pointer-events: auto;
}

/* visual tweaks */

.leaflet-container {
	background: #ddd;
	outline: 0;
}

.leaflet-container a {
	color: #0078A8;
}

.leaflet-container a.leaflet-active {
	outline: 2px solid orange;
}

.leaflet-zoom-box {
	border: 2px dotted #38f;
	background: rgba(255, 255, 255, 0.5);
}


/* general typography */
.leaflet-container {
	font: 12px/1.5 "Helvetica Neue", Arial, Helvetica, sans-serif;
}


/* general toolbar styles */

.leaflet-bar {
	box-shadow: 0 1px 5px rgba(0, 0, 0, 0.65);
	border-radius: 4px;
}

.leaflet-bar a,
.leaflet-bar a:hover {
	background-color: #fff;
	border-bottom: 1px solid #ccc;
	width: 26px;
	height: 26px;
	line-height: 26px;
	display: block;
	text-align: center;
	text-decoration: none;
	color: black;
}

.leaflet-bar a,
.leaflet-control-layers-toggle {
	background-position: 50% 50%;
	background-repeat: no-repeat;
	display: block;
}

.leaflet-bar a:hover {
	background-color: #f4f4f4;
}

.leaflet-bar a:first-child {
	border-top-left-radius: 4px;
	border-top-right-radius: 4px;
}

.leaflet-bar a:last-child {
	border-bottom-left-radius: 4px;
	border-bottom-right-radius: 4px;
	border-bottom: none;
}

.leaflet-bar a.leaflet-disabled {
	cursor: default;
	background-color: #f4f4f4;
	color: #bbb;
}

.leaflet-touch .leaflet-bar a {
	width: 30px;
	height: 30px;
	line-height: 30px;
}


/* zoom control */

.leaflet-control-zoom-in,
.leaflet-control-zoom-out {
	font: bold 18px 'Lucida Console', Monaco, monospace;
	text-indent: 1px;
}

.leaflet-control-zoom-out {
	font-size: 20px;
}

.leaflet-touch .leaflet-control-zoom-in {
	font-size: 22px;
}

.leaflet-touch .leaflet-control-zoom-out {
	font-size: 24px;
}


/* layers control */

.leaflet-control-layers {
	box-shadow: 0 1px 5px rgba(0, 0, 0, 0.4);
	background: #fff;
	border-radius: 5px;
}

.leaflet-control-layers-toggle {
	background-image: url(images/layers.png);
	width: 36px;
	height: 36px;
}

.leaflet-retina .leaflet-control-layers-toggle {
	background-image: url(images/layers-2x.png);
	background-size: 26px 26px;
}

.leaflet-touch .leaflet-control-layers-toggle {
	width: 44px;
	height: 44px;
}

.leaflet-control-layers .leaflet-control-layers-list,
.leaflet-control-layers-expanded .leaflet-control-layers-toggle {
	display: none;
}

.leaflet-control-layers-expanded .leaflet-control-layers-list {
	display: block;
	position: relative;
}

.leaflet-control-layers-expanded {
	padding: 6px 10px 6px 6px;
	color: #333;
	background: #fff;
}

.leaflet-control-layers-scrollbar {
	overflow-y: scroll;
	padding-right: 5px;
}

.leaflet-control-layers-selector {
	margin-top: 2px;
	position: relative;
	top: 1px;
}

.leaflet-control-layers label {
	display: block;
}

.leaflet-control-layers-separator {
	height: 0;
	border-top: 1px solid #ddd;
	margin: 5px -10px 5px -6px;
}

/* Default icon URLs */
.leaflet-default-icon-path {
	background-image: url(images/marker-icon.png);
}


/* attribution and scale controls */

.leaflet-container .leaflet-control-attribution {
	background: #fff;
	background: rgba(255, 255, 255, 0.7);
	margin: 0;
}

.leaflet-control-attribution,
.leaflet-control-scale-line {
	padding: 0 5px;
	color: #333;
}

.leaflet-control-attribution a {
	text-decoration: none;
}

.leaflet-control-attribution a:hover {
	text-decoration: underline;
}

.leaflet-container .leaflet-control-attribution,
.leaflet-container .leaflet-control-scale {
	font-size: 11px;
}

.leaflet-left .leaflet-control-scale {
	margin-left: 5px;
}

.leaflet-bottom .leaflet-control-scale {
	margin-bottom: 5px;
}

.leaflet-control-scale-line {
	border: 2px solid #777;
	border-top: none;
	line-height: 1.1;
	padding: 2px 5px 1px;
	font-size: 11px;
	white-space: nowrap;
	overflow: hidden;
	-moz-box-sizing: border-box;
	box-sizing: border-box;

	background: #fff;
	background: rgba(255, 255, 255, 0.5);
}

.leaflet-control-scale-line:not(:first-child) {
	border-top: 2px solid #777;
	border-bottom: none;
	margin-top: -2px;
}

.leaflet-control-scale-line:not(:first-child):not(:last-child) {
	border-bottom: 2px solid #777;
}

.leaflet-touch .leaflet-control-attribution,
.leaflet-touch .leaflet-control-layers,
.leaflet-touch .leaflet-bar {
	box-shadow: none;
}

.leaflet-touch .leaflet-control-layers,
.leaflet-touch .leaflet-bar {
	border: 2px solid rgba(0, 0, 0, 0.2);
	background-clip: padding-box;
}


/* popup */

.leaflet-popup {
	position: absolute;
	text-align: center;
	margin-bottom: 20px;
}

.leaflet-popup-content-wrapper {
	padding: 1px;
	text-align: left;
	border-radius: 12px;
}

.leaflet-popup-content {
	margin: 13px 19px;
	line-height: 1.4;
}

.leaflet-popup-content p {
	margin: 18px 0;
}

.leaflet-popup-tip-container {
	width: 40px;
	height: 20px;
	position: absolute;
	left: 50%;
	margin-left: -20px;
	overflow: hidden;
	pointer-events: none;
}

.leaflet-popup-tip {
	width: 17px;
	height: 17px;
	padding: 1px;

	margin: -10px auto 0;

	-webkit-transform: rotate(45deg);
	-moz-transform: rotate(45deg);
	-ms-transform: rotate(45deg);
	-o-transform: rotate(45deg);
	transform: rotate(45deg);
}

.leaflet-popup-content-wrapper,
.leaflet-popup-tip {
	background: white;
	color: #333;
	box-shadow: 0 3px 14px rgba(0, 0, 0, 0.4);
}

.leaflet-container a.leaflet-popup-close-button {
	position: absolute;
	top: 0;
	right: 0;
	padding: 4px 4px 0 0;
	border: none;
	text-align: center;
	width: 18px;
	height: 14px;
	font: 16px/14px Tahoma, Verdana, sans-serif;
	color: #c3c3c3;
	text-decoration: none;
	font-weight: bold;
	background: transparent;
}

.leaflet-container a.leaflet-popup-close-button:hover {
	color: #999;
}

.leaflet-popup-scrolled {
	overflow: auto;
	border-bottom: 1px solid #ddd;
	border-top: 1px solid #ddd;
}

.leaflet-oldie .leaflet-popup-content-wrapper {
	zoom: 1;
}

.leaflet-oldie .leaflet-popup-tip {
	width: 24px;
	margin: 0 auto;

	-ms-filter: "progid:DXImageTransform.Microsoft.Matrix(M11=0.70710678, M12=0.70710678, M21=-0.70710678, M22=0.70710678)";
	filter: progid:DXImageTransform.Microsoft.Matrix(M11=0.70710678, M12=0.70710678, M21=-0.70710678, M22=0.70710678);
}

.leaflet-oldie .leaflet-popup-tip-container {
	margin-top: -1px;
}

.leaflet-oldie .leaflet-control-zoom,
.leaflet-oldie .leaflet-control-layers,
.leaflet-oldie .leaflet-popup-content-wrapper,
.leaflet-oldie .leaflet-popup-tip {
	border: 1px solid #999;
}


/* div icon */

.leaflet-div-icon {
	background: #fff;
	border: 1px solid #666;
}


/* Tooltip */
/* Base styles for the element that has a tooltip */
.leaflet-tooltip {
	position: absolute;
	padding: 6px;
	background-color: #fff;
	border: 1px solid #fff;
	border-radius: 3px;
	color: #222;
	white-space: nowrap;
	-webkit-user-select: none;
	-moz-user-select: none;
	-ms-user-select: none;
	user-select: none;
	pointer-events: none;
	box-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
}

.leaflet-tooltip.leaflet-clickable {
	cursor: pointer;
	pointer-events: auto;
}

.leaflet-tooltip-top:before,
.leaflet-tooltip-bottom:before,
.leaflet-tooltip-left:before,
.leaflet-tooltip-right:before {
	position: absolute;
	pointer-events: none;
	border: 6px solid transparent;
	background: transparent;
	content: "";
}

/* Directions */

.leaflet-tooltip-bottom {
	margin-top: 6px;
}

.leaflet-tooltip-top {
	margin-top: -6px;
}

.leaflet-tooltip-bottom:before,
.leaflet-tooltip-top:before {
	left: 50%;
	margin-left: -6px;
}

.leaflet-tooltip-top:before {
	bottom: 0;
	margin-bottom: -12px;
	border-top-color: rgba(0, 0, 0, 0.6);
}

.leaflet-tooltip-bottom:before {
	top: 0;
	margin-top: -12px;
	margin-left: -6px;
	border-bottom-color: rgba(0, 0, 0, 0.6);
	opacity: 0.8;
}

.leaflet-tooltip-left {
	margin-left: -6px;
}

.leaflet-tooltip-right {
	margin-left: 6px;
}

.leaflet-tooltip-left:before,
.leaflet-tooltip-right:before {
	top: 50%;
	margin-top: -6px;
}

.leaflet-tooltip-left:before {
	right: 0;
	margin-right: -12px;
	border-left-color: rgba(0, 0, 0, 0.6);
	opacity: 0.8;
}

.leaflet-tooltip-right:before {
	left: 0;
	margin-left: -12px;
	border-right-color: rgba(0, 0, 0, 0.6);
	opacity: 0.8;
}

实现效果

参考：
leafletjs
leaflet_demo