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main.py
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main.py
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#!/usr/bin/python
# -*- coding: utf-8 -*-
__version__ = "1.0"
import kivy
kivy.require('1.8.0') # replace with your current kivy version !
from kivy.app import App
from kivy.uix.image import Image
from kivy.uix.carousel import Carousel
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.dropdown import DropDown
from kivy.uix.button import Button
from kivy.uix.label import Label
from kivy.uix.actionbar import *
from kivy.clock import Clock
from kivy.loader import Loader
from kivy.uix.progressbar import ProgressBar
# values and maps from wetterzentrale.de
values = [
'500hPa Geopot. T °C,Bodendruck',
'850hPa Geopot. und Temp °C',
'3h Niederschlag',
'2m Temperatur [max/min]',
'10m Wind',
'CAPE+Lifted Index',
'700 hPa Vertikalbewegung',
'2m Taupunkt',
'850 hPa Aeq.Pot.T + Bodendruck',
'Bodendruck + Hohe Wolken',
'Bodendruck + Mittelhohe Wolken',
'Bodendruck + Tiefe Wolken',
'700hPa Wind',
'Gesamtniederschlag',
'Spitzenwind']
# regions for wetterzentrale.de
regions = {
"M-Europa": "mgfs",
"Europa" : "tavn",
"N-Amerika": "namavn",
"S-Amerika": "samavn",
"Afrika": "afravn",
"Ostasien": "oasavn",
"Südasien": "sasavn",
"Australien": "ausavn",
"N-Hemisph.": "havn",
"S-Hemisph.": "savn",
"Osttropen": "etavn",
"Westtropen": "wtavn",
"Global": "wavn" }
appTitle = "GFS-Viewer (Karten)"
class gfsViewerApp(App):
global values
global regions
#init App class
def __init__(self, **kwargs):
super(gfsViewerApp, self).__init__(**kwargs)
self.carousel = Carousel(direction='right',anim_move_duration=0.1, anim_type='in_out_sine',loop='false')
self.active_region = "M-Europa"
self.active_value = "3h Niederschlag"
self.last_df = 0
self.image = []
self.limit = 0
self.pb = ""
self.src = ""
Loader.start()
# Loader-complete callback (for some reason AsyncImage got stuck
# when fed with to many request at once, so images get loaded here
# on after the other..
def _image_loaded(self, proxyImage):
if proxyImage.image.texture:
if len(self.image) > self.loadnum:
self.image[self.loadnum].texture = proxyImage.image.texture
if (self.loadnum < self.limit):
self.loadnum = self.loadnum + 1
self._load_next()
self.carousel.canvas.ask_update()
# load next image
def _load_next(self,*largs):
if (self.loadnum < self.limit):
# for some reason to many events where fired, so ignore
# calls that don't have a unique timestamp
if (len(largs) >0 ):
if self.last_df == largs[0]:
ignore = True
else:
ignore = False
self.last_df = largs[0]
else:
ignore = False
if not ignore:
#gif images make trouble, conversion happens on server
src = self.src % \
( regions[self.active_region], ((self.loadnum +1) * self.steps), values.index(self.active_value) + 1)
proxyImage = Loader.image(src)
# we already have that image in cache
if proxyImage.loaded:
self.image.append(Image())
self.image[self.loadnum].texture = proxyImage.image.texture
self.carousel.add_widget(self.image[self.loadnum])
self.loadnum = self.loadnum + 1
self._load_next()
# load image in background.
else:
proxyImage.bind(on_load=self._image_loaded)
self.image.append(Image())
self.image[self.loadnum].texture = proxyImage.image.texture
self.carousel.add_widget(self.image[self.loadnum])
#update widget..
self.carousel.canvas.ask_update()
# update progress bar
self.pb.value = (self.loadnum) / float(self.limit) * 100
self.ltext.text = "total: + %dh" % ((self.loadnum) * self.steps)
def _load_values(self,*largs):
if (len(largs) > 0 and self.last_df != 0):
if self.last_df == largs[0]:
ignore = True
else:
ignore = False
self.last_df = largs[0]
else:
ignore = False
# for some reason to many events where fired, so ignore
# calls that don't have a unique timestamp
if not ignore:
if self.active_region == "M-Europa":
self.steps = 3
self.limit = 60
else:
self.steps = 6
self.limit = 30
if self.active_region in ["M-Europa","Europa"]:
self.src = "http://m.ash.to/gfsViewer/imgloader.php?file=R%s%02d%d.gif&type=.png"
else:
self.src = "http://www.wetterzentrale.de/pics/R%s%02d%d.png"
self.loadnum = 0
self.image = []
self.last_df = 0
self._load_next(*largs)
def _clear_loader(self, *largs):
Loader.stop()
self.carousel.clear_widgets()
self.loadnum = 0
self.image = []
self.pb.value = 0
self.ltext.text = "total: "
# now load
Clock.schedule_once(self._load_values,0.2)
# new value selected callback
def _on_value_select(self,x):
self.carousel.clear_widgets()
Clock.schedule_once(self._clear_loader)
setattr(self.value_button, 'text', x)
self.active_value = x
# region select callback
def _on_region_select(self,x):
setattr(self.region_button, 'text', x)
self.active_region = x
self._on_value_select(self.active_value)
# build layout and app
def build(self):
self.icon = 'data/icon-s.png'
self.layout = BoxLayout(orientation='vertical')
ab = ActionBar(size_hint=(1,0.08), height="48dp")
av = ActionView()
av.add_widget(ActionPrevious(title=appTitle,with_previous=False, app_icon=self.icon))
ab.add_widget(av)
self.layout.add_widget(ab)
#region_dropdown = DropDown()
# disable drop-down options for the moment.
# needs more work (also different value selectors)
#for i in regions:
# btn = Button(text=i, size_hint_y=None, height="48dp")
# btn.bind(on_release=lambda btn: region_dropdown.select(btn.text))
# region_dropdown.add_widget(btn)
# region_dropdown.bind(on_select=lambda instance, x: self._on_region_select(x))
self.region_button = Button(text=self.active_region, size_hint_y=None, height="48dp")
#self.region_button.bind(on_release=region_dropdown.open)
self.layout.add_widget(self.region_button)
value_dropdown = DropDown()
for i in range(len(values)):
btn = Button(text=values[i], size_hint_y=None, height="48dp")
btn.bind(on_release=lambda btn: value_dropdown.select(btn.text))
value_dropdown.add_widget(btn)
value_dropdown.bind(on_select=lambda instance, x: self._on_value_select(x))
self.value_button = Button(text=self.active_value, size_hint_y=None, height="48dp")
self.value_button.bind(on_release=value_dropdown.open)
self.layout.add_widget(self.value_button)
self.layout.add_widget(self.carousel)
self.pb = ProgressBar(max=100,value=50, size_hint=(1,0.08),height=48)
self.layout.add_widget(self.pb)
self.ltext = Label(text='', size_hint_y=None,height="12dp",font_size="10dp")
self.layout.add_widget(self.ltext)
self._on_value_select(self.active_value)
return self.layout
if __name__ == '__main__':
gfsViewerApp().run()