def mk_map_region_selector(height='600px', **kwargs):
from ipyleaflet import Map, WidgetControl, FullScreenControl, DrawControl
from ipywidgets.widgets import Layout, Button, HTML
from types import SimpleNamespace
state = SimpleNamespace(selection=None, bounds=None, done=False)
btn_done = Button(description='done', layout=Layout(width='5em'))
btn_done.style.button_color = 'green'
btn_done.disabled = True
html_info = HTML(
layout=Layout(flex='1 0 20em', width='20em', height='3em'))
def update_info(txt):
html_info.value = '<pre style="color:grey">' + txt + '</pre>'
m = Map(**kwargs) if len(kwargs) else Map(zoom=2)
m.scroll_wheel_zoom = True
m.layout.height = height
widgets = [
WidgetControl(widget=btn_done, position='topright'),
WidgetControl(widget=html_info, position='bottomleft'),
]
for w in widgets:
m.add_control(w)
draw = DrawControl()
draw.circle = {}
draw.polyline = {}
draw.circlemarker = {}
shape_opts = {
"fillColor": "#fca45d",
"color": "#000000",
"fillOpacity": 0.1
}
draw.rectangle = {"shapeOptions": shape_opts}
poly_opts = {"shapeOptions": dict(**shape_opts)}
poly_opts["shapeOptions"]["original"] = dict(**shape_opts)
poly_opts["shapeOptions"]["editing"] = dict(**shape_opts)
draw.polygon = poly_opts
draw.edit = True
draw.remove = True
m.add_control(draw)
m.add_control(FullScreenControl())
def on_done(btn):
state.done = True
btn_done.disabled = True
m.remove_control(draw)
for w in widgets:
m.remove_control(w)
def bounds_handler(event):
(lat1, lon1), (lat2, lon2) = event['new']
txt = 'lat: [{:.{n}f}, {:.{n}f}]\nlon: [{:.{n}f}, {:.{n}f}]'.format(
lat1, lat2, lon1, lon2, n=4)
update_info(txt)
state.bounds = dict(lat=(lat1, lat2), lon=(lon1, lon2))
def on_draw(event):
v = event['new']
action = event['name']
if action == 'last_draw':
state.selection = v['geometry']
elif action == 'last_action' and v == 'deleted':
state.selection = None
btn_done.disabled = state.selection is None
draw.observe(on_draw)
m.observe(bounds_handler, ('bounds', ))
btn_done.on_click(on_done)
return m, state
def mk_map_region_selector(map=None, height="600px", **kwargs):
from ipyleaflet import Map, WidgetControl, FullScreenControl, DrawControl
from ipywidgets.widgets import Layout, Button, HTML
from types import SimpleNamespace
state = SimpleNamespace(selection=None, bounds=None, done=False)
btn_done = Button(description="done", layout=Layout(width="5em"))
btn_done.style.button_color = "green"
btn_done.disabled = True
html_info = HTML(layout=Layout(flex="1 0 20em", width="20em", height="3em"))
def update_info(txt):
html_info.value = '<pre style="color:grey">' + txt + "</pre>"
def render_bounds(bounds):
(lat1, lon1), (lat2, lon2) = bounds
txt = "lat: [{:.{n}f}, {:.{n}f}]\nlon: [{:.{n}f}, {:.{n}f}]".format(
lat1, lat2, lon1, lon2, n=4
)
update_info(txt)
if map is None:
m = Map(**kwargs) if len(kwargs) else Map(zoom=2)
m.scroll_wheel_zoom = True
m.layout.height = height
else:
m = map
render_bounds(m.bounds)
widgets = [
WidgetControl(widget=btn_done, position="topright"),
WidgetControl(widget=html_info, position="bottomleft"),
]
for w in widgets:
m.add_control(w)
draw = DrawControl()
draw.circle = {}
draw.polyline = {}
draw.circlemarker = {}
shape_opts = {"fillColor": "#fca45d", "color": "#000000", "fillOpacity": 0.1}
draw.rectangle = {"shapeOptions": shape_opts, "metric": ["km", "m"]}
poly_opts = {"shapeOptions": dict(**shape_opts)}
poly_opts["shapeOptions"]["original"] = dict(**shape_opts)
poly_opts["shapeOptions"]["editing"] = dict(**shape_opts)
draw.polygon = poly_opts
draw.edit = True
draw.remove = True
m.add_control(draw)
m.add_control(FullScreenControl())
def on_done(btn):
state.done = True
btn_done.disabled = True
m.remove_control(draw)
for w in widgets:
m.remove_control(w)
def bounds_handler(event):
bounds = event["new"]
render_bounds(bounds)
(lat1, lon1), (lat2, lon2) = bounds
state.bounds = dict(lat=(lat1, lat2), lon=(lon1, lon2))
def on_draw(event):
v = event["new"]
action = event["name"]
if action == "last_draw":
state.selection = v["geometry"]
elif action == "last_action" and v == "deleted":
state.selection = None
btn_done.disabled = state.selection is None
draw.observe(on_draw)
m.observe(bounds_handler, ("bounds",))
btn_done.on_click(on_done)
return m, state
