我正在使用使用传单插件的应用程序Beta_Here,所有库都是本地的,除了少数(css相关)
直播申请
第一个视图:此应用程序从用户获取输入并设置距离 相应的计算公式......
第二视图:输入输入例如9后,将加载第二个视图 在哪里我们可以绘制形状......
简介
我已经设置了将加载两个图像覆盖(图层)和脚本的脚本 我们可以从右上角切换它们,我们可以绘制或测量 左下角....
问题
当我们在图像上绘制形状或放置标记时,控件几乎可以工作 完美,但当我们切换图层时,就会出现问题.... 所有形状都去背景或(似乎它们消失了)
主要问题
我们如何将图纸和标记绑定到特定的 layer(imageoverlay)如果有方法,我们可以看到绘图 不与图像绑定,而是与地图容器绑定.....(请原谅我,如果你 觉得我做的事情很愚蠢,因为我的知识有限 关于图层所以我在这里提出了我的问题....
如果有人知道如何解决这个问题,请帮助或 任何形式的参考将不胜感激...感谢您的时间
工作脚本
var map = L.map('map', {
minZoom: 1,
maxZoom: 4,
center: [0, 0],
zoom: 0,
crs: L.CRS.Simple
});
// dimensions of the image
var w = 3200,
h = 1900,
mainurl = 'assets/img/isbimg.jpg';
childurl = 'assets/img/fjmap.png';
// calculate the edges of the image, in coordinate space
var southWest = map.unproject([0, h], map.getMaxZoom() - 1);
var northEast = map.unproject([w, 0], map.getMaxZoom() - 1);
var bounds = new L.LatLngBounds(southWest, northEast);
var featureGroup = L.featureGroup().addTo(map);
var drawControl = new L.Control.Draw({
edit: {
featureGroup: featureGroup
},
draw: {
polygon: true,
polyline: true,
rectangle: true,
circle: true,
marker: true
}
}).addTo(map);
map.on('draw:created', showPolygonArea);
map.on('draw:edited', showPolygonAreaEdited);
// add the image overlay,so that it covers the entire map
L.control.layers({
Main: L.imageOverlay(mainurl, bounds),
Child: L.imageOverlay(childurl, bounds)
}, null, { collapsed: false }).addTo(map);
L.control.nanomeasure({ nanometersPerPixel: 10000 }).addTo(map);
// tell leaflet that the map is exactly as big as the image
map.setMaxBounds(bounds);
L.tileLayer({
attribution: '<a href="http://smartminds.co">SmartMinds</a>',
maxZoom: 18
}).addTo(map);
//polygon area customization
function showPolygonAreaEdited(e) {
e.layers.eachLayer(function (layer) {
showPolygonArea({ layer: layer });
});
}
function showPolygonArea(e) {
var userInputCustom = prompt("Please enter image name : choose between a to f");
featureGroup.addLayer(e.layer);
e.layer.bindPopup("<div style='width:200px;height:200px;background-image: url(assets/img/" + userInputCustom + ".png);background-size: 195px 195px;;background-repeat: no-repeat;'></div>");
e.layer.openPopup();
}
});
答案 0 :(得分:1)
我会将FeatureGroup
和ImageOverlay
对包含在L.LayerGroup
中。然后,您可以在这些组之间切换。然后,您可以跟踪当前选定的组,并将您的功能添加到该组的功能层。我可以通过评论更好地解释它:
基本地图,没什么特别的:
var map = L.map('map', {
'center': [0, 0],
'zoom': 1,
'layers': [
L.tileLayer('http://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
'attribution': 'Map data © OpenStreetMap contributors'
})
]
});
// Bounds for the map and imageoverlays
var bounds = L.latLngBounds([[40.712216, -74.22655],[40.773941, -74.12544]]);
// Set bounds on the map
map.fitBounds(bounds);
分组部分:
// New layergroup, note it's not added to the map yet
var layerGroup = new L.LayerGroup(),
imageOverlayUrl = 'https://placeholdit.imgix.net/~text?txtsize=33&txt=Overlay 1&w=294&h=238',
// New imageoverlay added to the layergroup
imageOverlay = new L.ImageOverlay(imageOverlayUrl, bounds).addTo(layerGroup),
// New featuregroup added to the layergroup
featureGroup = new L.FeatureGroup().addTo(layerGroup);
// Second layergroup not added to the map yet
var layerGroup2 = new L.LayerGroup(),
imageOverlayUrl2 = 'https://placeholdit.imgix.net/~text?txtsize=33&txt=Overlay 2&w=294&h=238',
// New imageoverlay added to the second layergroup
imageOverlay2 = new L.imageOverlay(imageOverlayUrl2, bounds).addTo(layerGroup2),
// New featuregroup added to the second layergroup
featureGroup2 = new L.FeatureGroup().addTo(layerGroup2);
将两个图层组添加为底层图层的默认drawcontrol和layercontrol:
var layerControl = new L.control.layers({
'Group 1': layerGroup,
'Group 2': layerGroup2
}).addTo(map);
var drawControl = new L.Control.Draw().addTo(map);
这是神奇发生的地方;):
// Variable to hold the selected layergroup's featuregroup.
var currentFeatureGroup;
// Catch the layer change event
map.on('baselayerchange', function (layersControlEvent) {
// Loop over the layers contained in the current group
layersControlEvent.layer.eachLayer(function (layer) {
// If it's the imageoverlay make sure it's in the background
if (layer instanceof L.ImageOverlay) {
layer.bringToBack();
// If not then it's the featuregroup, reference with variable.
} else {
currentFeatureGroup = layer;
}
});
});
// Catch draw created event
map.on('draw:created', function (e) {
// Store created feature into the current featuregroup
currentFeatureGroup.addLayer(e.layer);
});
就是这样。非常基本只是作为一个例子,但它做你想要它做的事情。一个真正的实现看起来会有所不同,错误处理是因为例如当你绘制并且没有选择底层/覆盖时它会失败等。这是一个关于Plunker的工作示例:http://plnkr.co/edit/6cGceX?p=preview