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#!/usr/bin/env python
# -*- coding: utf8 -*-
import pygtk
pygtk.require('2.0')
import gtk
import cairo
import gobject
from math import pi
from math import cos
from math import sin
from socket import error as SocketError
__author__ = 'Robin Wittler <real@the-real.org>'
__license__ = 'BSD'
__version__ = '0.0.7'
# BSD terms apply: see the file COPYING in the distribution root for details.
#TODO
# add getopts and handle it
# add configparser
# add a config menu entry
# write unit tests!
# testing!
# cleanup and sanitize code
class Speedometer(gtk.DrawingArea):
def __init__(self, speed_unit=None):
gtk.DrawingArea.__init__(self)
self.connect('expose_event', self.expose_event)
self.long_ticks = (2, 1, 0, -1, -2, -3, -4, -5, -6, -7, -8)
self.short_ticks = (0.1, 0.2, 0.3, 0.4, 0.6, 0.7, 0.8, 0.9)
self.long_inset = lambda x: 0.1 * x
self.middle_inset = lambda x: self.long_inset(x) / 1.5
self.short_inset = lambda x: self.long_inset(x) / 3
self.res_div = 10.0
self.res_div_mul = 1
self.last_speed = 0
self.MPS_TO_KPH = 3.6000000000000001
self.MPS_TO_MPH = 2.2369363
self.MPS_TO_KNOTS = 1.9438445
self.MPH_UNIT_LABEL = 'mph'
self.KPH_UNIT_LABEL = 'kmh'
self.KNOTS_UNIT_LABEL = 'knots'
self.conversions = {
self.MPH_UNIT_LABEL: self.MPS_TO_MPH,
self.KPH_UNIT_LABEL: self.MPS_TO_KPH,
self.KNOTS_UNIT_LABEL: self.MPS_TO_KNOTS
}
self.speed_unit = speed_unit or self.MPH_UNIT_LABEL
if not self.speed_unit in self.conversions:
raise TypeError(
'%s is not a valid speed unit'
%(repr(speed_unit))
)
self.nums = {
-8: 0,
-7: 10,
-6: 20,
-5: 30,
-4: 40,
-3: 50,
-2: 60,
-1: 70,
0: 80,
1: 90,
2: 100
}
def expose_event(self, widget, event, data=None):
self.cr = self.window.cairo_create()
self.cr.rectangle(
event.area.x,
event.area.y,
event.area.width,
event.area.height
)
self.cr.clip()
x, y = self.get_x_y()
width, height = self.window.get_size()
radius = self.get_radius(width, height)
self.cr.set_line_width(radius / 100)
self.draw_arc_and_ticks(width, height, radius, x, y)
self.draw_needle(self.last_speed, radius, x, y)
self.draw_speed_text(self.last_speed, radius, x, y)
def draw_arc_and_ticks(self, width, height, radius, x, y):
self.cr.set_source_rgb(1.0, 1.0, 1.0)
self.cr.rectangle(0, 0, width, height)
self.cr.fill()
self.cr.set_source_rgb(0.0, 0.0, 0.0)
#draw the speedometer arc
self.cr.arc_negative(
x,
y,
radius,
self.degrees_to_radians(60),
self.degrees_to_radians(120)
)
self.cr.stroke()
long_inset = self.long_inset(radius)
middle_inset = self.middle_inset(radius)
short_inset = self.short_inset(radius)
#draw the ticks
for i in self.long_ticks:
self.cr.move_to(
x + (radius - long_inset) * cos(i * pi / 6.0),
y + (radius - long_inset) * sin(i * pi / 6.0)
)
self.cr.line_to(
x + (radius + (self.cr.get_line_width() / 2)) * cos(i * pi
/ 6.0),
y + (radius + (self.cr.get_line_width() / 2)) * sin(i * pi
/ 6.0)
)
self.cr.select_font_face(
'Georgia',
cairo.FONT_SLANT_NORMAL,
)
self.cr.set_font_size(radius / 10)
self.cr.save()
_num = str(self.nums.get(i) * self.res_div_mul)
(
x_bearing,
y_bearing,
t_width,
t_height,
x_advance,
y_advance
) = self.cr.text_extents(_num)
if i in (-8, -7, -6, -5, -4):
self.cr.move_to(
(x + (radius - long_inset - (t_width / 2)) * cos(i * pi
/ 6.0)),
(y + (radius - long_inset - (t_height * 2)) * sin(i * pi
/ 6.0))
)
elif i in (-2, -1, 0, 2, 1):
self.cr.move_to(
(x + (radius - long_inset - (t_width * 1.5 )) * cos(i * pi
/ 6.0)),
(y + (radius - long_inset - (t_height * 2 )) * sin(i * pi
/ 6.0))
)
elif i in (-3,):
self.cr.move_to(
(x - t_width / 2), (y - radius +
self.long_inset(radius) * 2 + t_height)
)
self.cr.show_text(_num)
self.cr.restore()
if i != self.long_ticks[0]:
self.cr.move_to(
x + (radius - middle_inset) * cos((i + 0.5) * pi / 6.0),
y + (radius - middle_inset) * sin((i + 0.5) * pi / 6.0)
)
self.cr.line_to(
x + (radius + (self.cr.get_line_width() / 2)) * cos((i
+ 0.5) * pi / 6.0),
y + (radius + (self.cr.get_line_width() / 2)) * sin((i
+ 0.5) * pi / 6.0)
)
for z in self.short_ticks:
if i < 0:
self.cr.move_to(
x + (radius - short_inset) * cos((i + z) * pi / 6.0),
y + (radius - short_inset) * sin((i + z) * pi / 6.0)
)
self.cr.line_to(
x + (radius + (self.cr.get_line_width() / 2)) * cos((i
+ z) * pi / 6.0),
y + (radius + (self.cr.get_line_width() / 2)) * sin((i
+ z) * pi / 6.0)
)
else:
self.cr.move_to(
x + (radius - short_inset) * cos((i - z) * pi / 6.0),
y + (radius - short_inset) * sin((i - z) * pi / 6.0)
)
self.cr.line_to(
x + (radius + (self.cr.get_line_width() / 2)) * cos((i
- z) * pi / 6.0),
y + (radius + (self.cr.get_line_width() / 2)) * sin((i
- z) * pi / 6.0)
)
self.cr.stroke()
def draw_needle(self, speed, radius, x, y):
self.cr.save()
inset = self.long_inset(radius)
speed = speed * self.conversions.get(self.speed_unit)
speed = speed / (self.res_div * self.res_div_mul)
actual = self.long_ticks[-1] + speed
if actual > self.long_ticks[0]:
#TODO test this in real conditions! ;)
self.res_div_mul += 1
speed = speed / (self.res_div * self.res_div_mul)
actual = self.long_ticks[-1] + speed
self.cr.move_to(x, y)
self.cr.line_to(
x + (radius - (2 * inset)) * cos(actual * pi / 6.0),
y + (radius - (2 * inset)) * sin(actual * pi / 6.0)
)
self.cr.stroke()
self.cr.restore()
def draw_speed_text(self, speed, radius, x, y):
self.cr.save()
speed = '%.2f %s' %(
speed * self.conversions.get(self.speed_unit),
self.speed_unit
)
self.cr.select_font_face(
'Georgia',
cairo.FONT_SLANT_NORMAL,
#cairo.FONT_WEIGHT_BOLD
)
self.cr.set_font_size(radius / 10)
x_bearing, y_bearing, t_width, t_height = self.cr.text_extents(speed)[:4]
self.cr.move_to((x - t_width / 2), (y + radius) - self.long_inset(radius))
self.cr.show_text(speed)
self.cr.restore()
def degrees_to_radians(self, degrees):
return ((pi / 180) * degrees)
def radians_to_degrees(self, radians):
return ((pi * 180) / radians)
def get_x_y(self):
rect = self.get_allocation()
x = (rect.x + rect.width / 2.0)
y = (rect.y + rect.height / 2.0) - 20
return x, y
def get_radius(self, width, height):
return min(width / 2.0, height / 2.0) - 20
class Main(object):
def __init__(self, host='localhost', port='2947', device=None, debug=0, speed_unit=None):
self.host = host
self.port = port
self.device = device
self.debug = debug
self.speed_unit = speed_unit
self.window = gtk.Window(gtk.WINDOW_TOPLEVEL)
if not self.window.get_display():
raise Exception("Can't open display")
self.window.set_title('xgpsspeed')
self.widget = Speedometer(speed_unit=self.speed_unit)
self.window.connect('delete_event', self.delete_event)
self.window.connect('destroy', self.destroy)
self.widget.show()
vbox = gtk.VBox(False, 0)
self.window.add(vbox)
self.window.present()
self.uimanager = gtk.UIManager()
self.accelgroup = self.uimanager.get_accel_group()
self.window.add_accel_group(self.accelgroup)
self.actiongroup = gtk.ActionGroup('gpsspeed-ng')
self.actiongroup.add_actions(
[('Quit', gtk.STOCK_QUIT, '_Quit', None,
'Quit the Program', lambda x: gtk.main_quit()),
('File', None, '_File'),
('Units', None, '_Units')]
)
self.actiongroup.add_radio_actions(
[('Imperial', None, '_Imperial', '<Control>i',
'Imperial Units', 0),
('Metric', None, '_Metric', '<Control>m',
'Metrical Units', 1),
('Nautical', None, '_Nautical', '<Control>n',
'Nautical Units', 2)
],
0, lambda a, v: setattr(self.widget, 'speed_unit', ['mph',
'kmh', 'knots'][a.get_current_value()])
)
self.uimanager.insert_action_group(self.actiongroup, 0)
self.uimanager.add_ui_from_string('''
<ui>
<menubar name='MenuBar'>
<menu action='File'>
<menuitem action='Quit'/>
</menu>
<menu action='Units'>
<menuitem action='Imperial'/>
<menuitem action='Metric'/>
<menuitem action='Nautical'/>
</menu>
</menubar>
</ui>
''')
self.active_unit_map = {
'mph': '/MenuBar/Units/Imperial',
'kmh': '/MenuBar/Units/Metric',
'knots': '/MenuBar/Units/Nautical'
}
menubar = self.uimanager.get_widget('/MenuBar')
self.uimanager.get_widget(
self.active_unit_map.get(self.speed_unit)
).set_active(True)
vbox.pack_start(menubar, False, False, 0)
vbox.add(self.widget)
self.window.show_all()
def watch(self, daemon, device):
self.daemon = daemon
self.device = device
gobject.io_add_watch(daemon.sock, gobject.IO_IN, self.handle_response)
gobject.io_add_watch(daemon.sock, gobject.IO_ERR, self.handle_hangup)
gobject.io_add_watch(daemon.sock, gobject.IO_HUP, self.handle_hangup)
return True
def handle_response(self, source, condition):
if self.daemon.read() == -1:
self.handle_hangup(source, condition)
if self.daemon.data['class'] == 'TPV':
self.update_speed(self.daemon.data)
return True
def handle_hangup(self, source, condition):
w = gtk.MessageDialog(
type=gtk.MESSAGE_ERROR,
flags=gtk.DIALOG_DESTROY_WITH_PARENT,
buttons=gtk.BUTTONS_OK
)
w.connect("destroy", lambda w: gtk.main_quit())
w.set_title('gpsd error')
w.set_markup("gpsd has stopped sending data.")
w.run()
gtk.main_quit()
return True
def update_speed(self, data):
if hasattr(data, 'speed'):
self.widget.last_speed = data.speed
self.widget.queue_draw()
def delete_event(self, widget, event, data=None):
#TODO handle all cleanup operations here
return False
def destroy(self, widget, data=None):
gtk.main_quit()
def run(self):
import gps
try:
daemon = gps.gps(
host = self.host,
port = self.port,
mode = gps.WATCH_ENABLE|gps.WATCH_JSON|gps.WATCH_SCALED,
verbose = self.debug
)
self.watch(daemon, self.device)
gtk.main()
except SocketError:
w = gtk.MessageDialog(
type=gtk.MESSAGE_ERROR,
flags=gtk.DIALOG_DESTROY_WITH_PARENT,
buttons=gtk.BUTTONS_OK
)
w.set_title('socket error')
w.set_markup(
"could not connect to gpsd socket. make sure gpsd is running."
)
w.run()
w.destroy()
except KeyboardInterrupt:
self.window.emit('delete_event', gtk.gdk.Event(gtk.gdk.NOTHING))
if __name__ == '__main__':
from sys import argv, exit
from os.path import basename
from optparse import OptionParser
prog = basename(argv[0])
usage = ('%s [-V|--version] [-h|--help] [--debug] [--host] ' +
'[--port] [--device] [--speedunits {[mph] [kmh] [knots]}] ' +
'[host [:port [:device]]]') %(prog)
epilog = 'BSD terms apply: see the file COPYING in the distribution root for details.'
version = '%s %s' %(prog, __version__)
parser = OptionParser(usage=usage, epilog=epilog)
parser.add_option(
'--host',
dest='host',
default='localhost',
help='The host to connect. [Default localhost]'
)
parser.add_option(
'--port',
dest='port',
default='2947',
help='The port to connect. [Default 2947]'
)
parser.add_option(
'--device',
dest='device',
default=None,
help='The device to connet. [Default None]'
)
parser.add_option(
'--speedunits',
dest='speedunits',
default='mph',
help='The unit of speed. Possible units are: mph, kmh, knots. [Default mph]'
)
parser.add_option(
'--debug',
dest='debug',
default=0,
action='store',
type='int',
help='Set level of debug. Must be integer. [Default 0]'
)
parser.add_option(
'-V',
'--version',
action='store_true',
default=False,
dest='version',
help='show program\'s version number and exit'
)
(options, args) = parser.parse_args()
if options.version:
print version
exit(0)
if args:
arg = args[0].split(':')
len_arg = len(arg)
if len_arg == 1:
(options.host,) = arg
elif len_arg == 2:
(options.host, options.port) = arg
elif len_arg == 3:
(options.host, options.port, options.device) = arg
else:
parser.print_help()
exit(0)
Main(
host=options.host,
port=options.port,
device=options.device,
speed_unit=options.speedunits,
debug=options.debug
).run()
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