Jquery 如何指定一个“；主动的；单张地图的区域？_Jquery_Openstreetmap_Leaflet

Jquery 如何指定一个“；主动的；单张地图的区域？

jquery leaflet

Jquery 如何指定一个“；主动的；单张地图的区域？,jquery,openstreetmap,leaflet,Jquery,Openstreetmap,Leaflet,请考虑：我有一个map div，可以在页面加载时扩展到全尺寸，还有一个半透明的div覆盖了它的底部。在美学上，我真的很喜欢底部div与后面的贴图的外观，但我需要使其成为透明div未覆盖的区域是“活动”区域也就是说，当地图计算标记和多边形的边界并设置其视图时，它计算的是该暴露区域，而不是整个地图本身。人们似乎认为这是可能的，但我正在努力实现小提琴上的代码如下： // JavaScript var map = L.map('map', { center: [51.505, -0.09], zo

请考虑：

我有一个map div，可以在页面加载时扩展到全尺寸，还有一个半透明的div覆盖了它的底部。在美学上，我真的很喜欢底部div与后面的贴图的外观，但我需要使其成为透明div未覆盖的区域是“活动”区域

也就是说，当地图计算标记和多边形的边界并设置其视图时，它计算的是该暴露区域，而不是整个地图本身。人们似乎认为这是可能的，但我正在努力实现

小提琴上的代码如下：

// JavaScript
var map = L.map('map', { center: [51.505, -0.09], zoom: 13 });
osm = L.tileLayer('http://{s}.tile.osm.org/{z}/{x}/{y}.png', {});
map.addLayer(osm);

function initMap() {
  $('#map').css({"height": $(window).height() + "px"});
  map.setView(map.getCenter(),map.getZoom());
}

var id;
$(window).resize(function() {
  clearTimeout(id);

  id = setTimeout(initMap, 500);
});

$('#map').css({"height": $(window).height() + "px"});
  map.setView(map.getCenter(),map.getZoom());

xxx

多亏了传单频道的@moiner，我被引导到这个Github问题线程，特别是以下评论：

它定义用于偏移地图中心的混合：

MapCenterOffsetMixin = {
    UIOffset: [550, 0], // x, y
    getBounds: function(){
        var a=this.getPixelBounds(),
            b=this.unproject(new L.Point(a.min.x+this.UIOffset[0],a.max.y+this.UIOffset[1]), this._zoom,!0),
            c=this.unproject(new L.Point(a.max.x,a.min.y),this._zoom,!0);
            return new L.LatLngBounds(b,c)
    },
    _latLngToNewLayerPoint: function (latlng, newZoom, newCenter) {
        var targetPoint = this.project(newCenter, newCenter).subtract([this.UIOffset[0]/2, this.UIOffset[1]/2]),
            newCenter = this.unproject(targetPoint, newZoom);
        var topLeft = this._getNewTopLeftPoint(newCenter, newZoom).add(this._getMapPanePos());
        return this.project(latlng, newZoom)._subtract(topLeft);
    },
    _getCenterLayerPoint: function () {
        return this.containerPointToLayerPoint(this.getSize().divideBy(2).add([this.UIOffset[0]/2, this.UIOffset[1]/2]));
    },
    _resetView: function (a, b, c, d) {
        var e = this._zoom !== b;
        // Change the center
        var targetPoint = this.project(a, b).subtract([this.UIOffset[0] / 2, this.UIOffset[1]/2]),
            a = this.unproject(targetPoint, b);
        d || (this.fire("movestart"), e && this.fire("zoomstart")), this._zoom = b, this._initialTopLeftPoint = this._getNewTopLeftPoint(a);
        if (!c) L.DomUtil.setPosition(this._mapPane, new L.Point(0, 0));
        else {
            var f = L.DomUtil.getPosition(this._mapPane);
            this._initialTopLeftPoint._add(f)
        }
        this._tileLayersToLoad = this._tileLayersNum, this.fire("viewreset", {
            hard: !c
        }), this.fire("move"), (e || d) && this.fire("zoomend"), this.fire("moveend"), this._loaded || (this._loaded = !0, this.fire("load"))
    }
}

L.Map.include(MapCenterOffsetMixin);

这对我很有效

<!-- HTML --->
<!DOCTYPE html>
<body>
    <div id="header"></div>
    <div id="map"></div>

    <div id="otherstuff">xxx</div>
</body>

MapCenterOffsetMixin = {
    UIOffset: [550, 0], // x, y
    getBounds: function(){
        var a=this.getPixelBounds(),
            b=this.unproject(new L.Point(a.min.x+this.UIOffset[0],a.max.y+this.UIOffset[1]), this._zoom,!0),
            c=this.unproject(new L.Point(a.max.x,a.min.y),this._zoom,!0);
            return new L.LatLngBounds(b,c)
    },
    _latLngToNewLayerPoint: function (latlng, newZoom, newCenter) {
        var targetPoint = this.project(newCenter, newCenter).subtract([this.UIOffset[0]/2, this.UIOffset[1]/2]),
            newCenter = this.unproject(targetPoint, newZoom);
        var topLeft = this._getNewTopLeftPoint(newCenter, newZoom).add(this._getMapPanePos());
        return this.project(latlng, newZoom)._subtract(topLeft);
    },
    _getCenterLayerPoint: function () {
        return this.containerPointToLayerPoint(this.getSize().divideBy(2).add([this.UIOffset[0]/2, this.UIOffset[1]/2]));
    },
    _resetView: function (a, b, c, d) {
        var e = this._zoom !== b;
        // Change the center
        var targetPoint = this.project(a, b).subtract([this.UIOffset[0] / 2, this.UIOffset[1]/2]),
            a = this.unproject(targetPoint, b);
        d || (this.fire("movestart"), e && this.fire("zoomstart")), this._zoom = b, this._initialTopLeftPoint = this._getNewTopLeftPoint(a);
        if (!c) L.DomUtil.setPosition(this._mapPane, new L.Point(0, 0));
        else {
            var f = L.DomUtil.getPosition(this._mapPane);
            this._initialTopLeftPoint._add(f)
        }
        this._tileLayersToLoad = this._tileLayersNum, this.fire("viewreset", {
            hard: !c
        }), this.fire("move"), (e || d) && this.fire("zoomend"), this.fire("moveend"), this._loaded || (this._loaded = !0, this.fire("load"))
    }
}

L.Map.include(MapCenterOffsetMixin);