[英]The mouseover event for D3.js does not work in Leaflet
我使用Leaflet繪制GeoJSON地圖。
2.使用D3在svg中創建一個節點
3.將鼠標懸停事件綁定到節點,但它不會生效
宣傳單版本:1.5.1 D3.js v5瀏覽器(帶版本):Chrome 75.0.3770.80 OS /平台(帶版本):Windows 10
<div id="mapDiv"></div>
<script>
var style = {
color: "#586a77",
opacity: 1,
weight: 1.5,
fillColor: "#323c48",
fillOpacity: .8
}
var mymap = L.map("mapDiv", {
center: [33.027088, 109.467773],
zoom: 4,
zoomControl: false,
attributionControl: false,
minZoom: 1,
maxZoom: 18
})
// 用d3讀取地圖geojson數據
d3.json("data/geojson/world.json")
.then((data) => {
L.geoJSON(data, {
style: style
}).addTo(mymap);
var svg = d3.select("#mapDiv").select("svg");
var d_plane =
"M59.79,12.92C62.42,9.4,64,5.75,64,3.15a3.62,3.62,0,0,0-.49-2,1.6,1.6,0,0,0-.29-.37,1.68,1.68,0,0,0-.34-.27,3.56,3.56,0,0,0-2-.51c-2.6,0-6.25,1.58-9.77,4.21-2.84,2.13-5.69,5.12-9.62,9.27L39.34,15.7l-7.62-2.28,0,0a1.71,1.71,0,0,0,0-2.41L30.36,9.61a1.71,1.71,0,0,0-1.21-.5,1.68,1.68,0,0,0-1.21.5l-2.06,2.06-1.09-.33a1.71,1.71,0,0,0-.14-2.25L23.27,7.7a1.71,1.71,0,0,0-1.21-.5,1.67,1.67,0,0,0-1.2.5L19,9.59,11.21,7.27a1.94,1.94,0,0,0-.55-.08,2.05,2.05,0,0,0-1.43.58L6.5,10.5A1.61,1.61,0,0,0,6,11.62,1.56,1.56,0,0,0,6.85,13l16.3,9.11a2.84,2.84,0,0,1,.4.3l4.65,4.65C23.85,31.66,20,36.09,17,40L16.15,41,3.54,39.86H3.32a2.33,2.33,0,0,0-1.56.65L.49,41.76A1.58,1.58,0,0,0,0,42.89a1.55,1.55,0,0,0,.92,1.43l8.87,4.21a2.07,2.07,0,0,1,.34.24l.74.73a5.38,5.38,0,0,0-.35,1.71,2.24,2.24,0,0,0,.62,1.63l0,0h0a2.25,2.25,0,0,0,1.63.61,5.43,5.43,0,0,0,1.69-.35l.75.75a2,2,0,0,1,.23.33l4.2,8.85a1.57,1.57,0,0,0,1.41.93h0a1.58,1.58,0,0,0,1.12-.47l1.3-1.31a2.32,2.32,0,0,0,.62-1.56c0-.07,0-.13,0-.16L23,47.85,24,47c3.86-3,8.3-6.9,12.87-11.24l4.65,4.66a2.49,2.49,0,0,1,.3.4L51,57.13a1.58,1.58,0,0,0,2.54.37l2.74-2.74a2.08,2.08,0,0,0,.56-1.43,2,2,0,0,0-.07-.54L54.41,45l1.89-1.89a1.71,1.71,0,0,0,0-2.41l-1.39-1.38a1.71,1.71,0,0,0-2.25-.14l-.32-1.09,2.06-2.06a1.72,1.72,0,0,0,.5-1.21,1.69,1.69,0,0,0-.5-1.2L53,32.27a1.71,1.71,0,0,0-2.42,0h0L48.3,24.65l2.25-2.14C54.68,18.59,57.67,15.76,59.79,12.92Z"
var plane = svg.append("g").attr("id", "plane").attr("fill", "#108ee9").attr("stroke-width", 1).attr('height',
10).attr('width', 10)
plane.append("path").attr("d", d_plane)
function mouseOver(d) {
console.log("mouseOver");
}
function mouseOut() {
console.log("mouseOut");
}
d3.select("#plane").on("mouseover", mouseOver).on("mouseout", mouseOut);
})
</script>
我的完整示例代碼是https://github.com/liruifengv/leaflet/blob/master/test.html
正如在這個問題中所解釋的,Leaflet將pointer-events
CSS屬性設置為none
應該接收鼠標/觸摸/指針事件的HTML元素。 Leaflet明確地為SVG容器做了這樣的事情 :
// makes it possible to click through svg root; we'll reset it back in individual paths
this._container.setAttribute('pointer-events', 'none');
為了使特定path
接收鼠標/觸摸/指針事件, Leaflet通過添加CSS類來重置特定路徑中的CSS屬性 :
if (layer.options.interactive) {
DomUtil.addClass(path, 'leaflet-interactive');
}
當然,Leaflet的CSS規則中有一個匹配位 :
.leaflet-pane > svg path.leaflet-interactive,
svg.leaflet-image-layer.leaflet-interactive path {
pointer-events: visiblePainted; /* IE 9-10 doesn't have auto */
pointer-events: auto;
}
因此,解決問題的一種方法是重置路徑的pointer-events
CSS屬性,如:
plane.append("path").attr("d", d_plane).attr("style", "pointer-events: auto;");
或者設置它的CSS類,如:
plane.append("path").attr("d", d_plane).attr("class", "leaflet-interactive");
重要說明: pointer-events
CSS屬性與pointer-events
SVG屬性不同 。 其pointer-events
CSS屬性設置為none
的SVG路徑將忽略其pointer-events
SVG屬性的值。
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