78 lines
1.8 KiB
JavaScript
78 lines
1.8 KiB
JavaScript
goog.require('ol.Feature');
|
|
goog.require('ol.Map');
|
|
goog.require('ol.Overlay');
|
|
goog.require('ol.RendererHint');
|
|
goog.require('ol.View2D');
|
|
goog.require('ol.geom.Point');
|
|
goog.require('ol.layer.Vector');
|
|
goog.require('ol.shape');
|
|
goog.require('ol.source.Vector');
|
|
goog.require('ol.style.Fill');
|
|
goog.require('ol.style.Stroke');
|
|
goog.require('ol.style.Style');
|
|
|
|
|
|
var count = 20000;
|
|
var features = new Array(count);
|
|
var e = 18000000;
|
|
for (var i = 0; i < count; ++i) {
|
|
features[i] = new ol.Feature({
|
|
'geometry': new ol.geom.Point(
|
|
[2 * e * Math.random() - e, 2 * e * Math.random() - e]),
|
|
'i': i,
|
|
'size': i % 2 ? 10 : 20
|
|
});
|
|
}
|
|
|
|
var styles = {
|
|
'10': [new ol.style.Style({
|
|
image: ol.shape.renderCircle(5,
|
|
new ol.style.Fill({color: '#666666'}),
|
|
new ol.style.Stroke({color: '#bada55', width: 1}))
|
|
})],
|
|
'20': [new ol.style.Style({
|
|
image: ol.shape.renderCircle(10,
|
|
new ol.style.Fill({color: '#666666'}),
|
|
new ol.style.Stroke({color: '#bada55', width: 1}))
|
|
})]
|
|
};
|
|
|
|
var vector = new ol.layer.Vector({
|
|
source: new ol.source.Vector({
|
|
features: features
|
|
}),
|
|
styleFunction: function(feature, resolution) {
|
|
return styles[feature.get('size')];
|
|
}
|
|
});
|
|
|
|
var popup = new ol.Overlay({
|
|
element: document.getElementById('popup')
|
|
});
|
|
|
|
var map = new ol.Map({
|
|
layers: [vector],
|
|
renderer: ol.RendererHint.CANVAS,
|
|
target: document.getElementById('map'),
|
|
view: new ol.View2D({
|
|
center: [0, 0],
|
|
zoom: 2
|
|
}),
|
|
overlays: [popup]
|
|
});
|
|
|
|
$(map.getViewport()).on('mousemove', function(e) {
|
|
var pixel = map.getEventPixel(e.originalEvent);
|
|
|
|
var hit = false;
|
|
map.forEachFeatureAtPixel(pixel, function(feature) {
|
|
hit = true;
|
|
});
|
|
|
|
if (hit) {
|
|
map.getTarget().style.cursor = 'pointer';
|
|
} else {
|
|
map.getTarget().style.cursor = '';
|
|
}
|
|
});
|