Files
openlayers/examples/vector-layer.js
2013-12-16 12:29:57 +01:00

95 lines
2.0 KiB
JavaScript

goog.require('ol.Map');
goog.require('ol.RendererHint');
goog.require('ol.View2D');
goog.require('ol.layer.Tile');
goog.require('ol.layer.Vector');
goog.require('ol.source.GeoJSON');
goog.require('ol.source.MapQuestOpenAerial');
goog.require('ol.style.Fill');
goog.require('ol.style.Stroke');
goog.require('ol.style.Style');
var styleArray = [new ol.style.Style({
fill: new ol.style.Fill({
color: 'rgba(255, 255, 255, 0.6)'
}),
stroke: new ol.style.Stroke({
color: '#319FD3',
width: 1
})
})];
var vectorLayer = new ol.layer.Vector({
source: new ol.source.GeoJSON({
url: 'data/countries.geojson'
}),
styleFunction: function(feature, resolution) {
return styleArray;
}
});
var map = new ol.Map({
layers: [
new ol.layer.Tile({
source: new ol.source.MapQuestOpenAerial()
}),
vectorLayer
],
renderer: ol.RendererHint.CANVAS,
target: 'map',
view: new ol.View2D({
center: [0, 0],
zoom: 1
})
});
var highlight;
var displayFeatureInfo = function(pixel) {
var oldHighlight = highlight;
var feature = map.forEachFeatureAtPixel(pixel, function(feature, layer) {
return feature;
});
var info = document.getElementById('info');
if (feature) {
info.innerHTML = feature.getId() + ': ' + feature.get('name');
} else {
info.innerHTML = ' ';
}
highlight = feature;
if (highlight !== oldHighlight) {
map.requestRenderFrame();
}
};
$(map.getViewport()).on('mousemove', function(evt) {
var pixel = map.getEventPixel(evt.originalEvent);
displayFeatureInfo(pixel);
});
map.on('singleclick', function(evt) {
var pixel = evt.getPixel();
displayFeatureInfo(pixel);
});
var highlightStyle = new ol.style.Style({
stroke: new ol.style.Stroke({
color: '#f00',
width: 1
}),
fill: new ol.style.Fill({
color: 'rgba(255,0,0,0.1)'
})
});
map.on('postcompose', function(evt) {
if (highlight) {
var render = evt.getRender();
render.drawFeature(highlight, highlightStyle);
}
});