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var normalstyles = {
'Point': [new ol.style.Style({
image: new ol.style.Circle({
fill: new ol.style.Fill({
color: 'rgba(255,255,255,0)'
}),
stroke: new ol.style.Stroke({
color: 'rgba(0,0,0,1)'
}),
radius: 5
})
})],
'Polygon': [new ol.style.Style({
fill: new ol.style.Fill({
color: 'rgba(255,255,255,0)'
}),
stroke: new ol.style.Stroke({
width: 1,
color: 'rgba(255,255,0,0)'
})
})]
};
var geoJSON = new ol.layer.Image({
title: 'buildings',
source: new ol.source.ImageVector({
source: new ol.source.Vector({
url: 'data/geojson',
format: new ol.format.GeoJSON({
defaultDataProjection :'EPSG:4326',
projection: 'EPSG:3857'
})
}),
style: function(feature, resolution){
var geom = feature.getGeometry().getType();
return normalstyles[geom];
}
})
});
var highlightstyles = {
'Point': [new ol.style.Style({
image: new ol.style.Circle({
fill: new ol.style.Fill({
color: 'rgba(255,0,0,0.1)'
}),
stroke: new ol.style.Stroke({
color: '#f00'
}),
radius: 5
})
})],
'Polygon': [new ol.style.Style({
fill: new ol.style.Fill({
color: 'rgba(255,0,0,0.1)'
}),
stroke: new ol.style.Stroke({
color: '#f00',
width: 1
})
})]
};
var map = new ol.Map({
layers: [new ol.layer.Tile({ source: new ol.source.OSM()}), geoJSON],
target: document.getElementById('map'),
view: new ol.View({
center: center,
zoom: 15
})
});
var featureOverlay = new ol.layer.Vector({
source: new ol.source.Vector(),
map: map,
style: function(feature, resolution){
var geom = feature.getGeometry().getType();
return highlightstyles[geom];
}
});
var highlight;
var displayFeatureInfo = function(pixel) {
var feature = map.forEachFeatureAtPixel(pixel, function(feature) {
return feature;
});
if (feature !== highlight) {
if (highlight) {
featureOverlay.getSource().removeFeature(highlight);
}
if (feature) {
featureOverlay.getSource().addFeature(feature);
}
highlight = feature;
}
};
这是我的代码。它基本上显示了geojson中的信息,并为鼠标悬停效果提供了一个亮点。 [This is what it looks like when it is idle] [This is what it looks like when I mouseover the polygon]Openlayers 3点被多边形覆盖
对于点多面之外,当我鼠标悬停它代表该点的圆形,我可以得到高光效果。但是,那些在多边形内部的点是无法到达的。它们被多边形覆盖。
关于如何让那些圆代表未被多边形覆盖的点的任何想法?
更新:
现在我改变了我的代码,这和点越来越突出。但是,多边形不能再显示高光。任何想法?
var displayFeatureInfo = function(pixel) {
var featurePoint = map.forEachFeatureAtPixel(pixel, function(feature) {
if (feature.getGeometry().getType() != 'Point') return feature;
});
var featurePolygon = map.forEachFeatureAtPixel(pixel, function(feature) {
if (feature.getGeometry().getType() != 'Polygon') return feature;
});
if (featurePoint !== highlight) {
if (highlight) {
featureOverlay.getSource().removeFeature(highlight);
}
if (featurePoint) {
featureOverlay.getSource().addFeature(featurePoint);
}
highlight = featurePoint;
}
if (featurePolygon !== highlight) {
if (highlight) {
featureOverlay.getSource().removeFeature(highlight);
}
if (featurePolygon) {
featureOverlay.getSource().addFeature(featurePolygon);
}
highlight = featurePolygon;
}
};
感谢您的建议!你的方法虽然不完美,我更新了这个问题。你可以看一下吗? – Zoff
nvm我想通了。非常感谢你! – Zoff
@Zoff抱歉,我以前看不到你的评论(时区差异) –