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#!/usr/bin/python
import gtk
import gobject
import threading
import time
from d_rats.geopy import distance
try:
import mapdisplay
import miscwidgets
except ImportError:
from d_rats import mapdisplay
from d_rats import miscwidgets
ZOOM_MIN = 10
ZOOM_MAX = 17
ZOOMS = {}
for x in range(ZOOM_MIN, ZOOM_MAX+1):
t = mapdisplay.MapTile(1, 1, x)
x1, y1, x2, __ = t.tile_edges()
dist = distance.distance((x1, y1), (x2, y1)).miles * 5
ZOOMS["%.1f (" %dist + _("max zoom") + " %i)" % x] = x
class MapDownloader(gtk.Window):
def make_info(self):
text = """
This is the D-RATS map download utility. It will attempt to fetch all of the required tiles for a given center location and desired diameter. The diameter is determined by the zoom level limit. All zoom levels below the one selected are fetched. D-RATS defaults to zoom level 14, so it is recommended that you choose at least that level to fetch. This operation fetches a lot of small files and can take quite a long time."""
l = gtk.Label(text)
l.set_line_wrap(True)
l.show()
return l
def make_val(self, key, label):
box = gtk.HBox(True, 2)
l = gtk.Label(label)
l.show()
e = miscwidgets.LatLonEntry()
e.show()
box.pack_start(l)
box.pack_start(e)
box.show()
self.vals[key] = e
return box
def make_zoom(self, key, label):
min = 10
max = ZOOM_MAX
default = 14
box = gtk.HBox(True, 2)
l = gtk.Label(label)
l.show()
def byval(x, y):
try:
return int(float(x.split(" ")[0]) - float(y.split(" ")[0]))
except Exception, e:
return 0
choices = sorted(ZOOMS.keys(), cmp=byval)
c = miscwidgets.make_choice(choices, False, choices[2])
c.show()
box.pack_start(l)
box.pack_start(c)
box.show()
self.vals[key] = c
return box
def build_bounds(self):
frame = gtk.Frame("Bounds")
box = gtk.VBox(True, 2)
self.val_keys = { "lat" : _("Latitude"),
"lon" : _("Longitude"),
"zoom" : _("Diameter"),
}
for i in ["lat", "lon"]:
box.pack_start(self.make_val(i, self.val_keys[i]), 0,0,0)
box.pack_start(self.make_zoom("zoom", _("Diameter") + " (miles)"), 0,0,0)
box.show()
frame.add(box)
frame.show()
return frame
def _update(self, prog, status):
if prog:
self.progbar.set_fraction(prog)
self.status.set_text(status)
if not self.enabled:
self.thread.join()
self.stop_button.set_sensitive(False)
self.start_button.set_sensitive(True)
def update(self, prog, status):
gobject.idle_add(self._update, prog, status)
def download_zoom(self, tick, zoom, x, y):
if zoom == ZOOM_MAX + 1:
return
nw = (2 * x, 2 * y)
sw = (2 * x, (2 * y) + 1)
ne = ((2 * x) + 1, 2 * y)
se = ((2 * x) + 1, (2 * y) + 1)
for i in (nw, sw, ne, se):
if self.enabled:
self.download_zoom(tick, zoom + 1, *i)
print "Downloading %i:%i,%i" % (zoom, x, y)
t = mapdisplay.MapTile(0, 0, zoom)
t.x = x
t.y = y
t.fetch()
tick()
def download_thread(self, **vals):
self.complete = False
self.enabled = True
zoom = vals["zoom"]
lat = vals["lat"]
lon = vals["lon"]
center = mapdisplay.MapTile(lat, lon, zoom)
self.count = 0
# The number of tiles $levels below zoom is 4^($levels)
# Each zoom level has a tile as well, so there are
# 4^$level under each zoom level, not counting the last
depth = pow(4, ZOOM_MAX - zoom)
extra = 0
for i in range(0, ZOOM_MAX - zoom):
extra += pow(4, i)
self.max = (depth + extra) * 25
def status_tick():
self.count += 1
percent = (float(self.count) / self.max)
self.update(percent, _("Downloading") + " (%.0f %%)" % (percent * 100.0))
for i in range(-2, 3):
if not self.enabled:
break
for j in range(-2, 3):
if not self.enabled:
break
tile = center + (i, j)
self.download_zoom(status_tick, zoom, tile.x, tile.y)
if self.enabled:
self.update(1.0, _("Complete"))
else:
self.update(None, _("Stopped"))
self.complete = True
self.enabled = False
def show_field_error(self, field):
d = gtk.MessageDialog(buttons=gtk.BUTTONS_OK, parent=self)
d.set_property("text", _("Invalid value for") + " `%s'" % field)
d.run()
d.destroy()
def show_range_error(self, field):
d = gtk.MessageDialog(buttons=gtk.BUTTONS_OK, parent=self)
d.set_property("text", _("Invalid range for") + " %s" % field)
d.run()
d.destroy()
def do_start(self, widget, data=None):
vals = {}
for k,e in self.vals.items():
try:
if "zoom" in k:
dia = e.get_active_text()
vals[k] = ZOOMS[dia]
else:
vals[k] = e.value()
except ValueError, e:
self.show_field_error(self.val_keys[k])
return
print "Zoom is %i" % vals["zoom"]
self.start_button.set_sensitive(False)
self.stop_button.set_sensitive(True)
print "Starting"
self.thread = threading.Thread(target=self.download_thread, kwargs=vals)
self.thread.setDaemon(True)
self.thread.start()
print "Started"
def do_stop(self, widget, data=None):
self.start_button.set_sensitive(True)
self.stop_button.set_sensitive(False)
self.enabled = False
self.thread.join()
def make_control_buttons(self):
box = gtk.HBox(True, 2)
self.start_button = gtk.Button(_("Start"))
self.start_button.set_size_request(75, 30)
self.start_button.connect("clicked", self.do_start)
self.start_button.show()
self.stop_button = gtk.Button(_("Stop"))
self.stop_button.set_size_request(75, 30)
self.stop_button.set_sensitive(False)
self.stop_button.connect("clicked", self.do_stop)
self.stop_button.show()
box.pack_start(self.start_button, 0,0,0)
box.pack_start(self.stop_button, 0,0,0)
box.show()
return box
def build_controls(self):
frame = gtk.Frame(_("Controls"))
box = gtk.VBox(False, 2)
self.progbar = gtk.ProgressBar()
self.progbar.show()
self.status = gtk.Label("")
self.status.show()
box.pack_start(self.progbar, 0,0,0)
box.pack_start(self.status, 0,0,0)
box.pack_start(self.make_control_buttons(), 0,0,0)
box.show()
frame.add(box)
frame.show()
return frame
def build_gui(self):
box = gtk.VBox(False, 2)
box.pack_start(self.make_info())
box.pack_start(self.build_bounds())
box.pack_start(self.build_controls())
box.show()
return box
def __init__(self, title=_("Map Download Utility")):
gtk.Window.__init__(self, gtk.WINDOW_TOPLEVEL)
self.set_title(title)
self.vals = {}
self.enabled = False
self.thread = None
self.completed = False
self.add(self.build_gui())
if __name__=="__main__":
gobject.threads_init()
def stop(*args):
gtk.main_quit()
w = MapDownloader()
w.connect("destroy", stop)
w.connect("delete_event", stop)
w.show()
gtk.main()
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