def get_latlon_at(self, x, y, zoom=None):
"""Return the current :class:`Coordinate` within the (x, y) widget
coordinate.
"""
if zoom is None:
zoom = self._zoom
vx, vy = self.viewport_pos
return Coordinate(lat=self.map_source.get_lat(zoom, y + vy),
lon=self.map_source.get_lon(zoom, x + vx))
def do_update(self, dt):
zoom = self._zoom
self.lon = self.map_source.get_lon(zoom, (self.center_x - self._scatter.x)/self.scale - self.delta_x)
self.lat = self.map_source.get_lat(zoom, (self.center_y - self._scatter.y)/self.scale - self.delta_y)
for layer in self._layers:
layer.reposition()
self.dispatch("on_map_relocated", zoom, Coordinate(self.lon, self.lat))
if self._need_redraw_full:
self._need_redraw_full = False
self.move_tiles_to_background()
self.load_visible_tiles()
else:
self.load_visible_tiles()