Select features example

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.

select, vector

Related API documentation:

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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');

/**
 * onchange callback on the select element.
 */
selectElement.onchange = changeInteraction;
changeInteraction();

<!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('&nbsp;' + 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>