[REQ] Official Leaflet Wisej Control or some advice tutorial to create it


Can i request official wisej control?, or some advice/tutorial/guideline to start to create a wisej leaflet advanced control (events-properties, methods…) for :
Has a great plugins to integrate too, would be amazing to have some samples with plugins to start with wisej control, personally i was using googlemaps/ajax/aspnet some time ago with some plugins like markercluster…, but leaflet markercluster plugin is a winner, smooth animations, small js file…

For reference here are some samples for leaflet markercluster plugin, has cluster feature, events like marker click to zoom pan and declutter, dinamic cluster/declustering … try change zoom…

You can using leaflet too, with openstreetmap provider to avoid some polices and save some cost like others (googlemaps…)

Thanks in advance!

  • Tom Van den Eynde
    I’d love to see a Leaflet component as well. Is it hard to create one myself (without being a Javascript wizard)?
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Does anyone know why OnWidgetEvent(WidgetEventArgs e) reports 0,0 instead of coordinates, works with same event in VsCode?

The repository / source code can be found at: https://github.com/Opzet/WjLeaflet

This works in js

      map.on('click', function(e) {
      } );

but calling the same via WidgetEvent return dynamic is faulty?

 protected override void OnWidgetEvent(WidgetEventArgs e)
            switch (e.Type)
                case "click":  //Mapclick
                case "rightclick":
                    // latlng 
                    OnMapClick(new MapMouseEventArgs(e));

LeafletjsMap -> LeafletMap.cs

        /// <summary>
        /// Fired when the user clicks on the map or a marker.
        /// </summary>
        public event MapMouseEventHandler MapClick
            add { base.AddHandler(nameof(MapClick), value); }
            remove { base.RemoveHandler(nameof(MapClick), value); }

Wired up

this.leafletMap1.MapClick` += new LeafletjsMaps.MapMouseEventHandler(this.leafletMap1_MapClick);

Line 60: frmWjLeafletjs.cs

// C# Event -> reports co ordinates 0,0 ?

        private void leafletMap1_MapClick(object sender, MapMouseEventArgs e)
            // To Do : MapMouseEventArgs not bubbling up, always shows as Lat:0 , Lon:0 ?
            // Works in VsCode?

            if (e.Marker == null)
                AlertBox.Show("You clicked location: " + e.Location.ToString());
  • David
    • David
    • Feb 6, 2023 - 9:06 am
    Works now.. :) Implemented -> map. On(“click”, this._onMapClick.bind(this)); //Js – > this.map.on(‘click’, function(e) { alert(“Location is: ” + e.latlng); }); in startup.js see https://github.com/Opzet/WjLeaflet
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Hello Wisej Community,

I’ve created a Github repository for a Wisej LeafletJS widget called WjLeaflet. This widget provides advanced control features such as events, properties, and methods.

The repository can be found at: https://github.com/Opzet/WjLeaflet

I would greatly appreciate it if the Wisej community could review the repository and contribute to help implement the full feature set of LeafletJS from Wisej C#.

Thank you for your time and support!


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You’ll need to create a Widget. (see https://docs.wisej.com/docs/controls/content/widget )

I would recommend following the Leaflet Quick Start Guide when you are trying to figure out what Javascript you need to write to get a simple implementation of Leaflet.

A similar question was recently asked, about implementing a different JavaScript widget (Lottie Web Player). It’s a very similar process to implement Leaflet. For Leaflet, you will need a different Javascript source code file. (For Leaflet, I believe it is “https://unpkg.com/leaflet@1.9.3/dist/leaflet.js”). Additionally, the Javascript to initialize the component will look a little different.

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