event to lock cluster when zooming (prevent update)

[henrikmaa]

Describe the solution you'd like A function to freeze the deflate at a certain zoom level. Preventing any updates to the deflating/clustering until you unlock the layers again.

Describe alternatives you've considered L.markercluster has a sub plugin for this: https://github.com/ghybs/Leaflet.MarkerCluster.Freezable I could not make it work because I could not get access to L.markerClusterGroup

Additional context https://ghybs.github.io/Leaflet.MarkerCluster.Freezable/examples/mcg-freezable.html?leaflet=1.3.1&leaflet.markercluster=1.3.0&leaflet.markercluster.freezable=1.0.0 freezeAtZoom()

[oliverroick]

Hi @henrikmaa,

I need to think about this a little when I have time.

Just to make sure I understand what you're after, you're looking to add freezing functionality directly to Leaflet.Deflate and not to run Leaflet.MarkerCluster.Freezable with Leaflet.Deflate. Basically adding two methods to L.Deflate:

• freezeAtZoom
• unfreeze

And out of curiosity, what is the use case for this?

[henrikmaa]

Hi, not need to add freezing to Leaflet.deflate, my issue was that i did not get access to Leaflet.markerClusterGroup using Leaflet.Deflate. That prevented me to use the freezeAtZoom etc..

The reason I need this is because im editing a SINGLE object using leaflet-geoman. And when you are editing an object and perform a zoom (in or out) the markercluster fires some events to recluster, which then enables edit for ALL OBJECTS. I have managed to get that problem fixed using only leaflet markerCluster and not using Leaflet.Deflate, but now I cant get PolyLines to cluster. Making it possible to use the Leaflet.MarkerCluster Freezable with leaflet.Deflate would solve all my problems.

[oliverroick]

Hi @henrikmaa,

I've just published a beta that should make Leaflet.Deflate work with Leaflet.MarkerCluster.Freezable. It introduces layer injection, that means, you can now inject the layer used to display deflated features on the map, which allows you to control that layer outside of L.deflate.

You can install the beta using npm install Leaflet.Deflate@next

There is an example for markercluster.freezable in the branch I'm working on.

You basically have to instantiate a L.markerClusterGroup and then pass it as the markerLayer option into L.deflate:

var map = L.map("map").setView([51.550406, -0.140765], 16);

L.tileLayer('http://{s}.tile.osm.org/{z}/{x}/{y}.png', {
  attribution: '&copy; <a href="http://osm.org/copyright">OpenStreetMap</a> contributors'
}).addTo(map);

var layer = L.markerClusterGroup();
var features = L.deflate({minSize: 20, markerLayer: layer});
features.addTo(map);

// add all your features

layer.freezeAtZoom(15);

Let me know how this works for you. If this is ok, I can make a full release soon.

[oliverroick]

The changes have been released with 1.4.0. Closing the ticket.