[Python] Add a button to jump to location on the map

Discussão em 'Python' iniciado por Stack, Março 26, 2025.

  1. Stack

    Stack Membro Participativo

    I have a folium.Map, and I'd like to add buttons in the exported HTML file, so that when I click on them, it would change the view to the locations selected.

    Here is the Python code to generate the HTML map, with two buttons:

    import folium

    m = folium.Map(location=[48.8566, 2.3522], zoom_start=10)

    # Add buttons to jump to Paris and London
    buttons_html = """
    <div style="position: fixed; top: 10px; left: 50px; z-index: 1000;">
    <button onclick="jumpToCity(48.8566, 2.3522, 12)">Paris</button>
    <button onclick="jumpToCity(51.5074, -0.1278, 12)">London</button>
    </div>
    <script>
    function jumpToCity(lat, lng, zoom) {
    var map = document.querySelector('.leaflet-container')._leaflet_map;
    map.setView([lat, lng], zoom);
    }
    </script>
    """

    m.get_root().html.add_child(folium.Element(buttons_html))
    m.save('output.html')


    After some digging, in the generated HTML file, I found that the object of the map is generated with a name composed of a hash that changes every time I run the code:

    var map_931983127ff2ad4bbeb40856ea0710c9 = L.map(
    "map_931983127ff2ad4bbeb40856ea0710c9",
    {
    center: [48.8566, 2.3522],
    crs: L.CRS.EPSG3857,
    zoom: 10,
    zoomControl: true,
    preferCanvas: false,
    }
    );


    If I manually change the command map.setView(...) to map_931983127ff2ad4bbeb40856ea0710c9.setView(...) in the HTML, the buttons work well.

    Is there a way to set this automatically? A solution (but an ugly one) would be to include in the Python a small script after the export that would update the HTML file (using regexp or something like that).

    Continue reading...

Compartilhe esta Página