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 Main(App):
height = 720
width = (height/16) * 9
Window.size = (width,height)
def build(self):
self.itu_lat = 55.6593807
self.itu_lon = 12.5910774
self.obs_dic = None
self.old_time = 0.0
self.weatherbox = AnchorLayout(anchor_x = 'center', anchor_y = 'bottom')
self.Layout = RelativeLayout()
self.mapview = MapView(zoom=11, lat=self.itu_lat, lon=self.itu_lon)
mapview = self.mapview
self.Layout.add_widget(mapview)
# add map layer
self.jsonmap = GeoJsonMapLayer(source='5_mile_airport.json')
self.mapview.add_layer(self.jsonmap)
self.overlay = AnchorLayout(anchor_x='right', anchor_y='top')
lowerLeft = AnchorLayout(anchor_x='left', anchor_y='bottom')
self.lowerLeftStack = StackLayout(orientation='lr-bt',size_hint=(0.15,0.15))
lowerLeft.add_widget(self.lowerLeftStack)
btnre = Button(background_normal='refocus_normal.png', background_down='refocus_down.png', size_hint = (2,1))
btnre.bind(on_press=self.resetloc)
btnnf = ToggleButton(background_normal='nofly_normal.png', background_down='nofly_down.png',size_hint = (2,1))
btnnf.bind(on_press=self.nofly)
self.lowerLeftStack.add_widget(btnre)
self.lowerLeftStack.add_widget(btnnf)
btn = ToggleButton(background_normal='Settings B.png', background_down="Settings G.png")
btn.bind(on_press= self.show_dropdown)
self.settings = StackLayout(size_hint=(0.2,0.2))
self.settings.add_widget(btn)
self.overlay.add_widget(self.settings)
self.Layout.add_widget(lowerLeft)
self.Layout.add_widget(self.overlay)
marker = MapMarker(anchor_x = 0.5, anchor_y = 0.5, lat=self.itu_lat, lon=self.itu_lon)
self.mapview.add_marker(marker)
return self.Layout
def resetloc(self,instance):
self.mapview.center_on(self.itu_lat,self.itu_lon)
def nofly(self,instance):
if instance.state == 'down':
self.mapview.remove_layer(self.jsonmap)
else:
self.mapview.add_layer(self.jsonmap)
def show_dropdown(self,instance):
if instance.state == 'down':
size = (1,0.5)
btn1 = ToggleButton(text='Weather', size_hint = size)
btn2 = Button(text='Level',size_hint = size)
btn3 = Button(text='Nearby\nusers', size_hint = size)
btn1.bind(on_press = self.show_weather_data)
self.settings.add_widget(btn1)
self.settings.add_widget(btn2)
self.settings.add_widget(btn3)
else:
for child in self.settings.children[:]:
if child.text != "":
self.settings.remove_widget(child)
def show_weather_data(self,instance):
weatherbox = self.weatherbox
if instance.state == 'down':
layout = BoxLayout(orientation='vertical', size_hint = (0.2,0.1) )
clat = self.mapview.lat
clon = self.mapview.lon
ctime = time.time()
if(self.obs_dic == None or ctime > (self.old_time + 0.5)):
self.old_time = ctime
self.obs_dic = api.loc_weather(clat,clon)
weList = self.obs_dic['weather']
we = weList[0]
wi = self.obs_dic['wind']
l1 = Label(text = 'Current weather: ' + we['main'], color = (0.,0.,0.,1))
main = self.obs_dic['main']
k = main['temp']
#Conversion from imperial to metric
temp = k-273.15
l2 = Label(text = 'temp: ' + str(temp) + ' ' + u'\u00B0' + 'C', color = (0.,0.,0.,1))
hu = main['humidity']
l3 = Label(text = 'humidity: ' + str(hu) + '%', color = (0.,0.,0.,1))
pre = main['pressure']
l4 = Label(text = 'pressure' + str(pre) + ' hPa', color = (0.,0.,0.,1))
wispeed = wi['speed']
widir = wi['deg']
l5 = Label(text = 'wind speed: ' + str(wispeed) + 'm/s', color = (0.,0.,0.,1))
l6 = Label(text = 'wind direction '+ str(widir) + u'\u00B0', color = (0.,0.,0.,1))
Tdp = temp - ((100-hu)/5)
l7 = Label(text = 'dew point: ' + str(Tdp) + ' ' + u'\u00B0' + 'C', color = (0.,0.,0.,1))
layout.add_widget(l1)
layout.add_widget(l2)
layout.add_widget(l3)
layout.add_widget(l4)
layout.add_widget(l5)
layout.add_widget(l6)
layout.add_widget(l7)
weatherbox.add_widget(layout)
weatherbox.add_widget
self.Layout.add_widget(weatherbox)
else:
for c in self.weatherbox.children[:]:
for child in c.children[:]:
c.remove_widget(child)
self.weatherbox.remove_widget(c)
self.overlay.remove_widget(weatherbox)
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
