Clicked point¶

This notebook demonstrates how you can access the coordinate of the most recent click on a Lonboard map and update a set of widgets to display the x and y coordinates using the ipywidgets.observe method.

In [ ]:

from typing import Tuple

import ipywidgets as widgets

from lonboard import Map

## Create a Lonboard map and two widgets to display the coordinate
m = Map(layers=[])
clicked_x_display = widgets.FloatText(description="last clicked x:")
clicked_y_display = widgets.FloatText(description="last clicked y:")


def on_map_click(coordinate: Tuple[float, float]) -> None:
    x, y = coordinate
    clicked_x_display.value = x
    clicked_y_display.value = y


m.on_click(on_map_click)

## show the widgets
widgets.VBox(
    [
        m,
        clicked_x_display,
        clicked_y_display,
    ],
)

from typing import Tuple import ipywidgets as widgets from lonboard import Map ## Create a Lonboard map and two widgets to display the coordinate m = Map(layers=[]) clicked_x_display = widgets.FloatText(description="last clicked x:") clicked_y_display = widgets.FloatText(description="last clicked y:") def on_map_click(coordinate: Tuple[float, float]) -> None: x, y = coordinate clicked_x_display.value = x clicked_y_display.value = y m.on_click(on_map_click) ## show the widgets widgets.VBox( [ m, clicked_x_display, clicked_y_display, ], )