Example of using the Select interaction.
Choose between Single-click
, Click
, Hover
and Alt+Click
as the event type for selection in the combobox below. When using Single-click
or Click
you can hold do Shift
key to toggle the feature in the selection.
Note: when Single-click
is used double-clicks won't select features. This in contrast to Click
, where a double-click will both select the feature and zoom the map (because of the DoubleClickZoom
interaction). Note that Single-click
is less responsive than Click
because of the delay it uses to detect double-clicks.
In this example, a listener is registered for the Select interaction's select
event in order to update the selection status below.
<!DOCTYPE html>
<html>
<head>
<title>Select features example</title>
<script src="https://code.jquery.com/jquery-1.11.2.min.js"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="http://openlayers.org/en/v3.9.0/css/ol.css" type="text/css">
<script src="http://openlayers.org/en/v3.9.0/build/ol.js"></script>
</head>
<body>
<div class="container-fluid">
<div class="row-fluid">
<div class="span12">
<div id="map" class="map"></div>
</div>
</div>
</div>
<script>
var raster = new ol.layer.Tile({
source: new ol.source.MapQuest({layer: 'sat'})
});
var vector = new ol.layer.Vector({
source: new ol.source.Vector({
url: 'data/geojson/countries.geojson',
format: new ol.format.GeoJSON()
})
});
var map = new ol.Map({
layers: [raster, vector],
target: 'map',
view: new ol.View({
center: [0, 0],
zoom: 2
})
});
var select = null; // ref to currently selected interaction
// select interaction working on "singleclick"
var selectSingleClick = new ol.interaction.Select();
// select interaction working on "click"
var selectClick = new ol.interaction.Select({
condition: ol.events.condition.click
});
// select interaction working on "pointermove"
var selectPointerMove = new ol.interaction.Select({
condition: ol.events.condition.pointerMove
});
var selectAltClick = new ol.interaction.Select({
condition: function(mapBrowserEvent) {
return ol.events.condition.click(mapBrowserEvent) &&
ol.events.condition.altKeyOnly(mapBrowserEvent);
}
});
var selectElement = document.getElementById('type');
var changeInteraction = function() {
if (select !== null) {
map.removeInteraction(select);
}
var value = selectElement.value;
if (value == 'singleclick') {
select = selectSingleClick;
} else if (value == 'click') {
select = selectClick;
} else if (value == 'pointermove') {
select = selectPointerMove;
} else if (value == 'altclick') {
select = selectAltClick;
} else {
select = null;
}
if (select !== null) {
map.addInteraction(select);
select.on('select', function(e) {
$('#status').html(' ' + e.target.getFeatures().getLength() +
' selected features (last operation selected ' + e.selected.length +
' and deselected ' + e.deselected.length + ' features)');
});
}
};
/**
* onchange callback on the select element.
*/
selectElement.onchange = changeInteraction;
changeInteraction();
</script>
</body>
</html>