enhanced leaflet support

[WolfgangFahl]

see http://nicesrt.bitplan.com and https://github.com/WolfgangFahl/nicesrt for an enhanced leaflet support https://github.com/WolfgangFahl/nicesrt/blob/main/nicesrt/leaflet.py based on https://github.com/zauberzeug/nicegui/blob/main/examples/map/leaflet.py it add set_zoom_level and draw_path functions for a start.

[rodja]

Thanks for sharing @WolfgangFahl. Very interesting. We are also working on a map component because of some requirements from a few of our robot projects.

[WolfgangFahl]

@rodja - I'd also need read access - how can i get e.g. the zoomlevel back via javascript? I'd love te get a layout similar to https://cycle.travel/map/journey/466345 with map and 2D/3D display

[falkoschindler]

Can't you hold props like zoomlevel in Python? So you don't need to read it back from the client, but simply return it in a Python property or method.

[WolfgangFahl]

The problem is that the code uses javascript functions that modify the zoomlevel. Currently only manual adjusting the slider to the same zoomlevel somewhat helps but that's IMHO only and ugly workaround. Generally methods should of course have return types. Even if the set of possible types would be limited e.g. only string or string/int/float/date that would already be helpful. Would this be a feature request with a new ticket?

[falkoschindler]

Yes, but why not keeping track of the current zoom level in Python like this:

def set_zoom_level(self, zoom_level: int):
    self.zoom_level = zoom_level
    self.run_method("set_zoom_level", zoom_level)

def get_zoom_level(self) -> int:
    return self.zoom_level

Apart from that you're suggesting to add return values to Element.run_method(...)? Sure, that would probably be a useful feature and deserves its own ticket.

[WolfgangFahl]

@falkoschindler I do already keep track the zoom level set by nicetrack as suggested. So we only need the feature request.

[WolfgangFahl]

see #1471