def __init__(self, *args, **kwargs):
super(MapBrowser, self).__init__(**kwargs)
mapview = MapView(lat=50.6394,
lon=3.057,
zoom=8,
cache_dir="cache")
self.add_widget(mapview)
mapview.add_widget(MapMarker(lat=50.6394, lon=3.057))
mapview.add_widget(MapMarker(lat=-33.867, lon=151.206))
top_bar = Toolbar(pos_hint={'top': 1})
def center_on(lat, lon, instance):
mapview.center_on(lat, lon)
label_lat.text = "Latitude: {}".format(mapview.lat)
label_lon.text = "Longitude: {}".format(mapview.lon)
btn_lille = Button(text="Move to Lille, France")
btn_lille.bind(on_release=partial(center_on, 50.6394, 3.057))
top_bar.add_widget(btn_lille)
btn_sydney = Button(text="Move to Sydney, Autralia")
btn_sydney.bind(on_release=partial(center_on, -33.867, 151.206))
top_bar.add_widget(btn_sydney)
spinner_src = Spinner(text="mapnik", values=MapSource.providers.keys())
def set_source(instance, selected_text):
mapview.map_source = selected_text
spinner_src.bind(text=set_source)
top_bar.add_widget(spinner_src)
bottom_bar = Toolbar()
label_lon = Label(text="Longitude: {}".format(mapview.lon))
label_lat = Label(text="Latitude: {}".format(mapview.lat))
bottom_bar.add_widget(label_lon)
bottom_bar.add_widget(label_lat)
self.add_widget(top_bar)
self.add_widget(bottom_bar)
class ShowMap(BoxLayout):
def __init__(self, *args, **kwargs):
super(ShowMap, self).__init__(**kwargs)
points = JsonStore("points_of_interest.json")
self.view = MapView(lat=points["center"]['lat'],
lon=points["center"]['lon'],
zoom=15,
cache_dir="cache")
# Add Route
layer = GeoJsonMapLayer(source="route.json")
self.view.add_layer(layer)
# Add User
user_marker = MapMarker(lat=points["center"]['lat'],
lon=points["center"]['lon'],
source='assets/icon_user.png')
self.view.add_widget(user_marker)
# Add Icons
self.icons = MapIcons(width='60sp')
def zoom_in(instance):
print('Zoom In:', self.view.zoom)
if self.view.zoom == 19:
return
self.view.zoom += 1
self.icons.btn_zoom_in.bind(on_press=zoom_in)
def zoom_out(instance):
print('Zoom Out:', self.view.zoom)
if self.view.zoom == 1:
return
self.view.zoom -= 1
self.icons.btn_zoom_out.bind(on_press=zoom_out)
def center_on(instance):
print('Center On:', user_marker.lat, user_marker.lon)
self.view.center_on(user_marker.lat, user_marker.lon)
self.icons.btn_center_on.bind(on_press=center_on)
self.view.add_widget(self.icons)
for point in points["list"]:
bubble = Bubble(orientation='vertical', background_image=point['image'])
map_marker = MapMarkerPopup(id="marker",
lat=point['lat'],
lon=point['lon'],
source='assets/icon_marker.png')
map_marker.add_widget(bubble)
self.view.add_marker(map_marker)
self.add_widget(self.view)
### Begin Close Bubble ###
def close_bubbles(arg, touch):
for c in self.view.children:
for cc in c.children:
if cc.id == 'marker':
if len(cc.children) and cc.is_open:
cc.is_open = False
cc.refresh_open_status()
self.view.children[-1].bind(on_touch_up=close_bubbles)
### End Close Bubble ###
def on_size(self, *args):
if self.view:
self.icons.pos = (self.width - self.icons.width, (self.height - self.icons.height)/2.)
class ISSScreen(Screen):
def __init__(self, **kwargs):
super(ISSScreen, self).__init__(**kwargs)
# Set the path for the folder
self.path = os.path.dirname(os.path.abspath(__file__))
# Set the path for local images
self.imagefolder = os.path.join(self.path, "images")
# Ephem calculates the position using the Two Line Element data
# We need to make sure we have up to date info
tle = self.get_TLE()
# Create an iss object from which we can get positional data
self.iss = ephem.readtle(*tle)
# Run the calculations
self.iss.compute()
# Get positon of iss and place a marker there
lat, lon = self.get_loc()
self.marker = MapMarker(lat=lat, lon=lon)
# Create a value to check when we last drew ISS path
self.last_path_update = 0
# Create the path icon
self.path_icon = os.path.join(self.imagefolder, "dot.png")
# Create the world map
self.map = MapView(id="mpv", lat=0, lon=0, zoom=1, scale=1.5)
x, y = self.map.get_window_xy_from(0, 0, 1)
self.map.scale_at(1.2, x, y)
# Add the ISS marker to the map and draw the map on the screen
self.map.add_widget(self.marker)
self.add_widget(self.map)
# Add a new layer for the path
self.mmlayer = MarkerMapLayer()
self.draw_iss_path()
self.timer = None
def on_enter(self):
self.timer = Clock.schedule_interval(self.update, 1)
def on_leave(self):
Clock.unschedule(self.timer)
def utcnow(self):
return (datetime.utcnow() - datetime(1970, 1, 1)).total_seconds()
def draw_iss_path(self):
# Path is drawn every 5 mins
if self.utcnow() - self.last_path_update > 30:
try:
self.map.remove_layer(self.mmlayer)
except:
pass
self.mmlayer = MarkerMapLayer()
# Create markers showing the ISS's position every 5 mins
for i in range(20):
lat, lon = self.get_loc(datetime.now() + timedelta(0, i * 300))
self.mmlayer.add_widget(
MapMarker(lat=lat, lon=lon, source=self.path_icon))
# Update the flag so we know when next update should be run
self.last_path_update = self.utcnow()
# Add the layer and call the reposition function otherwise the
# markers don't show otherwise!
self.map.add_layer(self.mmlayer)
self.mmlayer.reposition()
def get_TLE(self):
# Set some flags
need_update = False
# Set our data source and the name of the object we're tracking
source = "http://www.celestrak.com/NORAD/elements/stations.txt"
ISS = "ISS (ZARYA)"
# Get the current time
utc_now = self.utcnow()
# Set the name of our file to store data
data = os.path.join(self.path, "iss_tle.json")
# Try loading old data
try:
with open(data, "r") as savefile:
saved = json.load(savefile)
# If we can't create a dummy dict
except IOError:
saved = {"updated": 0}
# If old data is more than an hour hold, let's check for an update
if utc_now - saved["updated"] > 3600:
need_update = True
# If we don't have any TLE data then we need an update
if not saved.get("tle"):
need_update = True
if need_update:
# Load the TLE data
raw = requests.get(source).text
# Split the data into a neat list
all_sats = [sat.strip() for sat in raw.split("\n")]
# Find the ISS and grab the whole TLE (three lines)
iss_index = all_sats.index(ISS)
iss_tle = all_sats[iss_index:iss_index + 3]
# Prepare a dict to save our data
new_tle = {"updated": utc_now, "tle": iss_tle}
# Save it
with open(data, "w") as savefile:
json.dump(new_tle, savefile, indent=4)
# ephem needs strings not unicode
return [str(x) for x in iss_tle]
else:
# return the saved data (as strings)
return [str(x) for x in saved["tle"]]
def update(self, *args):
# Update the ISS with newest TLE
self.iss = ephem.readtle(*self.get_TLE())
# Get the position and update marker
lat, lon = self.get_loc()
self.marker.lat = lat
self.marker.lon = lon
self.map.remove_widget(self.marker)
self.map.add_widget(self.marker)
# Check if the path needs redrawing
self.draw_iss_path()
def get_loc(self, dt=None):
# We can get the location for a specific time as well
if dt is None:
self.iss.compute()
else:
self.iss.compute(dt)
# Convert the ephem data into something that the map can use
lat = float(self.iss.sublat / ephem.degree)
lon = float(self.iss.sublong / ephem.degree)
return lat, lon
class ISSScreen(Screen):
def __init__(self, **kwargs):
super(ISSScreen, self).__init__(**kwargs)
# Set the path for the folder
self.path = os.path.dirname(os.path.abspath(__file__))
# Set the path for local images
self.imagefolder = os.path.join(self.path, "images")
# Ephem calculates the position using the Two Line Element data
# We need to make sure we have up to date info
tle = self.get_TLE()
# Create an iss object from which we can get positional data
self.iss = ephem.readtle(*tle)
# Run the calculations
self.iss.compute()
# Get positon of iss and place a marker there
lat, lon = self.get_loc()
self.marker = MapMarker(lat=lat, lon=lon)
# Create a value to check when we last drew ISS path
self.last_path_update = 0
# Create the path icon
self.path_icon = os.path.join(self.imagefolder, "dot.png")
# Create the world map
self.map = MapView(id="mpv",lat=0, lon=0, zoom=1, scale=1.5)
x, y = self.map.get_window_xy_from(0,0,1)
self.map.scale_at(1.2, x, y)
# Add the ISS marker to the map and draw the map on the screen
self.map.add_widget(self.marker)
self.add_widget(self.map)
# Add a new layer for the path
self.mmlayer = MarkerMapLayer()
self.draw_iss_path()
self.timer = None
def on_enter(self):
self.timer = Clock.schedule_interval(self.update, 1)
def on_leave(self):
Clock.unschedule(self.timer)
def utcnow(self):
return (datetime.utcnow() - datetime(1970,1,1)).total_seconds()
def draw_iss_path(self):
# Path is drawn every 5 mins
if self.utcnow() - self.last_path_update > 30:
try:
self.map.remove_layer(self.mmlayer)
except:
pass
self.mmlayer = MarkerMapLayer()
# Create markers showing the ISS's position every 5 mins
for i in range(20):
lat, lon = self.get_loc(datetime.now() + timedelta(0, i * 300))
self.mmlayer.add_widget(MapMarker(lat=lat,
lon=lon,
source=self.path_icon))
# Update the flag so we know when next update should be run
self.last_path_update = self.utcnow()
# Add the layer and call the reposition function otherwise the
# markers don't show otherwise!
self.map.add_layer(self.mmlayer)
self.mmlayer.reposition()
def get_TLE(self):
# Set some flags
need_update = False
# Set our data source and the name of the object we're tracking
source = "http://www.celestrak.com/NORAD/elements/stations.txt"
ISS = "ISS (ZARYA)"
# Get the current time
utc_now = self.utcnow()
# Set the name of our file to store data
data = os.path.join(self.path, "iss_tle.json")
# Try loading old data
try:
with open(data, "r") as savefile:
saved = json.load(savefile)
# If we can't create a dummy dict
except IOError:
saved = {"updated": 0}
# If old data is more than an hour hold, let's check for an update
if utc_now - saved["updated"] > 3600:
need_update = True
# If we don't have any TLE data then we need an update
if not saved.get("tle"):
need_update = True
if need_update:
# Load the TLE data
raw = requests.get(source).text
# Split the data into a neat list
all_sats = [sat.strip() for sat in raw.split("\n")]
# Find the ISS and grab the whole TLE (three lines)
iss_index = all_sats.index(ISS)
iss_tle = all_sats[iss_index:iss_index + 3]
# Prepare a dict to save our data
new_tle = {"updated": utc_now,
"tle": iss_tle}
# Save it
with open(data, "w") as savefile:
json.dump(new_tle, savefile, indent=4)
# ephem needs strings not unicode
return [str(x) for x in iss_tle]
else:
# return the saved data (as strings)
return [str(x) for x in saved["tle"]]
def update(self, *args):
# Update the ISS with newest TLE
self.iss = ephem.readtle(*self.get_TLE())
# Get the position and update marker
lat, lon = self.get_loc()
self.marker.lat = lat
self.marker.lon = lon
self.map.remove_widget(self.marker)
self.map.add_widget(self.marker)
# Check if the path needs redrawing
self.draw_iss_path()
def get_loc(self, dt=None):
# We can get the location for a specific time as well
if dt is None:
self.iss.compute()
else:
self.iss.compute(dt)
# Convert the ephem data into something that the map can use
lat = float(self.iss.sublat / ephem.degree)
lon = float(self.iss.sublong / ephem.degree)
return lat, lon
