11 class mapWidget(gtk.Image):
15 gtk.Image.__init__(self)
17 # Maximum width should be 800, but actually gets reduced
18 self.win_x , self.win_y = 800 , 480
20 p = gtk.gdk.Pixbuf(gtk.gdk.COLORSPACE_RGB, True, 8, self.win_x, self.win_y)
21 self.set_from_pixbuf(p)
26 self.reftile_x , self.reftile_y = self.lon2tilex( lon , zoom ) , self.lat2tiley( lat , zoom )
28 # Half the size of a tile
29 self.refpix_x , self.refpix_y = 128 , 128
30 self.refpix_x , self.refpix_y = 0 , 0
32 self.composeMap( zoom )
34 def lon2tilex ( self , lon , zoom ) :
35 return int( ( lon + 180 ) / 360 * 2 ** zoom )
37 def lat2tiley ( self , lat , zoom ) :
38 lat = lat * math.pi / 180
39 return int( ( 1 - math.log( math.tan( lat ) + 1 / math.cos( lat ) ) / math.pi ) / 2 * 2 ** zoom )
41 def composeMap( self , zoom ) :
42 center_x , center_y = self.win_x / 2 , self.win_y / 2
44 # To get the central pixel in the window center, we must shift to the tile origin
45 center_x -= self.refpix_x
46 center_y -= self.refpix_y
48 # Ranges should be long enough as to fill the screen
49 # Maybe they should be decided based on self.win_x, self.win_y
50 for i in range(-3,4) :
51 for j in range(-3,4) :
52 file = self.tilename( i , j , zoom )
54 pixbuf = gtk.gdk.Pixbuf(gtk.gdk.COLORSPACE_RGB, False, 8, 256, 256 )
55 pixbuf.fill( 0x00000000 )
58 pixbuf = gtk.gdk.pixbuf_new_from_file( file )
59 except gobject.GError , ex :
60 print "Corrupted file %s" % ( file )
62 #file = self.tilename( self.reftile_x + i , self.reftile_y + j , zoom )
63 file = self.tilename( i , j , zoom )
65 pixbuf = gtk.gdk.pixbuf_new_from_file( file )
67 print "Total failure for tile for %s,%s" % ( self.reftile_x + i , self.reftile_y + j )
68 pixbuf = gtk.gdk.Pixbuf(gtk.gdk.COLORSPACE_RGB, False, 8, 256, 256 )
70 dest_x = 256 * i + center_x
71 dest_y = 256 * j + center_y
79 if dest_x + 256 > self.win_x :
80 size_x = self.win_x - dest_x
88 if dest_y + 256 > self.win_y :
89 size_y = self.win_y - dest_y
91 if ( size_x > 0 and size_y > 0 ) and ( init_x < 256 and init_y < 256 ) :
92 pixbuf.copy_area( init_x, init_y, size_x, size_y, self.get_pixbuf(), dest_x , dest_y )
95 def tilename ( self , x , y , zoom ) :
96 file = self.tile2file( self.reftile_x + x , self.reftile_y + y , zoom )
103 # useful members : response.code, response.headers
104 response = urllib2.urlopen( "http://tile.openstreetmap.org/%s/%s/%s.png" % ( zoom , x , y ) )
105 if response.geturl() == "http://tile.openstreetmap.org/11/0/0.png" :
107 fd = open( file , 'w' )
108 fd.write( response.read() )
116 def tile2file( self , tilex , tiley , zoom ) :
117 basedir = "/home/user/MyDocs/.maps/OpenStreetMap I"
118 rootdir = "%s/%s" % ( basedir , zoom )
119 if not os.path.isdir( rootdir ) :
121 rootsubdir = "%s/%s" % ( rootdir , tilex )
122 if not os.path.isdir( rootsubdir ) :
124 return "%s/%s.png" % ( rootsubdir , tiley )
126 def Shift( self , dx , dy ) :
129 tile_x , tile_y = ( self.refpix_x - dx ) / 256 , ( self.refpix_y - dy ) / 256
130 self.reftile_x += tile_x
131 self.reftile_y += tile_y
133 self.refpix_x -= dx + 256 * tile_x
134 self.refpix_y -= dy + 256 * tile_y
136 self.composeMap( self.zoom )
142 self.composeMap( self.zoom )
148 self.composeMap( self.zoom )
154 self.composeMap( self.zoom )
160 self.composeMap( self.zoom )
165 def delete_event(self, widget, event, data=None):
166 # If you return FALSE in the "delete_event" signal handler,
167 # GTK will emit the "destroy" signal. Returning TRUE means
168 # you don't want the window to be destroyed.
169 # This is useful for popping up 'are you sure you want to quit?'
171 print "delete event occurred"
173 # Change FALSE to TRUE and the main window will not be destroyed
174 # with a "delete_event".
177 def destroy(self, widget, data=None):
178 print "destroy signal occurred"
181 def press_event ( self, widget, event, *args ) :
182 # FIXME : Set only if far enough from borders
185 print "press ",event.get_coords(),event.get_root_coords()
186 if event.x > border_x and event.y > border_y and event.x < ( self.size_x - border_x ) and event.y < ( self.size_y - border_y ) :
187 self.click_x = event.x
188 self.click_y = event.y
190 def release_event ( self, widget, event, *args ) :
192 print "unpress",event.get_coords(),event.get_root_coords()
193 if self.click_x is not None and self.click_y is not None :
194 delta_x = int( event.x - self.click_x )
195 delta_y = int( event.y - self.click_y )
196 shift = math.sqrt( delta_x * delta_x + delta_y * delta_y )
197 if shift > min_shift :
198 self.map.Shift(delta_x, delta_y)
201 # elif delta_x < -100 :
203 # elif delta_y > 100 :
205 # elif delta_y < -100 :
207 self.click_x , self.click_y = None , None
209 def screen_event ( self, widget, event, *args ) :
215 def on_button_press ( self, widget, event, *args ) :
218 def on_key_press ( self, widget, event, *args ) :
219 if event.keyval == gtk.keysyms.Up :
221 elif event.keyval == gtk.keysyms.Down :
223 elif event.keyval == gtk.keysyms.Right :
225 elif event.keyval == gtk.keysyms.Left :
228 print "UNKNOWN",event.keyval
232 self.window = gtk.Window(gtk.WINDOW_TOPLEVEL)
234 self.window.connect("delete_event", self.delete_event)
235 self.window.connect("destroy", self.destroy)
237 self.window.set_border_width(10)
239 self.window.connect("key-press-event", self.on_key_press)
241 # To get explicit GDK_BUTTON_PRESS instead of paired GDK_LEAVE_NOTIFY & GDK_ENTER_NOTIFY
242 # self.window.add_events(gtk.gdk.BUTTON_MOTION_MASK | gtk.gdk.BUTTON_PRESS_MASK | gtk.gdk.BUTTON_RELEASE_MASK | gtk.gdk.POINTER_MOTION_MASK)
243 self.window.set_events( gtk.gdk.BUTTON_PRESS_MASK | gtk.gdk.BUTTON_RELEASE_MASK )
245 # self.window.connect('motion_notify_event', self.screen_event)
246 self.window.connect('button_press_event', self.press_event)
247 self.window.connect('button_release_event', self.release_event)
249 self.map = mapWidget()
250 self.window.add( self.map )
253 self.window.show_all()
255 self.size_x , self.size_y = 800 , 480
256 self.click_x , self.click_y = None , None
261 if __name__ == "__main__":