import appuifw
import urllib
import e32

class App:
    def __init__(self):
    
        # List of items on tab 0 (Exeter)
        self.exeter_maps = {
        'http://www4.devon.gov.uk/webcam/mbarton/mbarton1.jpg':u'Marsh Barton Road',
        'http://www4.devon.gov.uk/webcam/mbarton/mbarton2.jpg':u'Trusham Road',
        }
        
        # List of items on tab 1 (M5)
        self.m5_maps = {
        'http://www4.devon.gov.uk/webcam/m5j30/cctv1.jpg':u'Sandygate West',
        'http://www4.devon.gov.uk/webcam/m5j30/cctv2.jpg':u'Sandygate East'
        }
        
        # List of items on tab 2 (Torquay)
        self.torquay_maps = {
        'http://www4.devon.gov.uk/webcam/m5j30/cctv3.jpg':u'Penn Inn Roundabout',
        'http://212.104.136.164/webcam/images/torquay_harbour.jpg':u'Torquay Harbour'   
        }

        # Synchronisation
        self.lock = e32.Ao_lock()
        
        # Handle our own exit events
        self.old_exit_key = appuifw.app.exit_key_handler
        appuifw.app.exit_key_handler = self.exit_handler
        
        # Set the current tab to 0 and display it 
        self.maps_list = (self.exeter_maps, self.m5_maps, self.torquay_maps)
        self.current_tab = 0
        appuifw.app.set_tabs([u'Exeter', u'M5 J30', u'Torquay'], self.display_tab)
        self.display_tab( 0 )
        
        # Reset our current title to something approopriate
        self.old_title = appuifw.app.title
        appuifw.app.title = u"Traffic Cameras"
        
        # Add a load image option to the menu
        appuifw.app.menu = [(u"Load Image", self.load)]      
        
        # Wait for input  
        self.lock.wait()
        
    def exit_handler(self):
        
        # Exit handler, remember to reset the application title
        appuifw.app.title = self.old_title
        self.lock.signal()
        
    def display_tab(self, id):
        
        # Push a listbox to each tab when they are displayed 
        self.lb = appuifw.Listbox(self.maps_list[id].values(), self.load)
        appuifw.app.body = self.lb
        self.current_tab = id
    
    def wait(self):
        appuifw.note(u"Fetching traffic camera image, please wait...", "info")
        
    def load(self):
        
        # Load an image when a Listbox() value is selected
        try: 
            # Grab the currently selected item in the listbox,
            # and the current tab id so we can make the query
            item = self.lb.current()
            id = self.current_tab
         
            # Set the Listbox() to tell the user we're doing something           
            self.lb.set_list([u"Please wait..." ]) 
            
            # Lookup the URL for that tab and item
            k = self.maps_list[id].keys()
            url = "%s" % k[item]
            
            # Lookup the place name for that tab and item
            m = self.maps_list[id].values()
            name = "%s" % m[item]
                               
            # Disable the menu, no multiple pulls 
            appuifw.app.menu = [(u"Load Image", self.wait)]     
            
            # Popup an info note to tell the user we're doing something
            appuifw.note(u"Fetching traffic camera image of " + name, "info")
            
            # Grab the image over GPRS
            urllib.urlretrieve(url, "C:\\traffic.jpg")
            content_handler = appuifw.Content_handler()
            content_handler.open("C:\\traffic.jpg")
        except IOError:
            appuifw.note(u"Could not fetch the image.",'error')
        except Exception, E:
            appuifw.note(u"Could not open the data, %s"%E,'error')
        
        # All done, reenable the menu, and set the listbox
        # back to the original list values
        appuifw.app.menu = [(u"Load Image", self.load)]      
        self.display_tab( id )    
            
A = App()