OpenLayers 3 – Obtaining Pixel from Right-Click Event

openlayers

In the 'click' event with the left mouse button I have the variable 'pixel' (an array with x and y), which can be used by 'forEachFeatureAtPixel':

map.forEachFeatureAtPixel(event.pixel, function (feature, layer) {})

In contrast, in the event "contextmenu" is not there at all and I cannot use the function "forEachFeatureAtPixel". How can I do this?

Best Answer

Found the solution! We can you can use getEventPixel function to obtain Pixel.

map.getEventPixel(event)

So this is the code that gets all the features on that spot:

map.forEachFeatureAtPixel(map.getEventPixel(event), function (feature, layer) {})

Related Solutions

[GIS] Stop OpenLayers 3 map firing click event after dragging

I had the same issue, with a click event firing when dragging a map, when using:

map.getViewport().addEventListener('click', function);

I have changed this to use the ol3 event 'singleclick', the singleclick has a small delay to ensure it is not triggered by a drag or doubleclick:

map.on('singleclick', function(evt){
  var coordinate = evt.coordinate;
  var pixel = evt.pixel;
}

This way also provides more useful parameters on the event.

Source: ol3-dev discussion

OpenLayers 3 – How to Get Only Modified Feature

I guess you pass all the features to the modify interaction. That is why it returns all of them (If you dont provide your code I can only guess). You can always use a select interaction and then pass the selected feature to modify interction. For your case you may iterate through your features and check for the revision, each time a feature is modified, its version number will be incremented.

So do something like this

var modifiedFeatures;
modify.on('modifyend', function(e) {
    var features = e.features.getArray();
    console.log(features.length);
    for (var i = 0; i < features.length; i++) {
        var rev = features[i].getRevision();
        if (rev > 1) {
            console.log("feature with revision:" + rev + " has been modified");
            modifiedFeatures.push(features[i]);
        }
    }
});

check this fiddle.

Best Answer

Related Solutions

[GIS] Stop OpenLayers 3 map firing click event after dragging

OpenLayers 3 – How to Get Only Modified Feature

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