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clock.py
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clock.py
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#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# Code released in the Public Domain. You can do whatever you want
# with this package. Though I'm learning Python, I've tried to use
# the best practices in XO development. Look at NOTES file to see how
# to adapt this program. Originally written by Pierre Métras
# <[email protected]> for the OLPC XO laptop.
"""Learning time.
==============
Sugar was missing a simple clock for kids to learn how to
read time, but more importantly to know what time is is. When you
don't own a clock, Sugar can be used to display the time to
arrive in time at school...
A clock can also be used to learn how to count and read numbers.
Display and behavior can be changed with the buttons in the toolbar:
- A simple clock with hours figures to learn to tell the time.
- A nice clock face, without hours numbers.
- A digital clock with a time scale.
Also, the clock can print the current time in full letters. Or speak
it aloud.
To help learning the time, all the clocks displays use a consistent
color code:
- Hours blue: #005FE4
- Minutes green: #00B20D
- Seconds red: #E6000A
- Days dark red: #B20008
- Months purple: #5E008C
- Years brown: #9A5200
An analog clock is also very helpfull to determine where the North is when you
don't have a compass!
Check http://www.wikihow.com/Find-True-North-Without-a-Compass
And knowing where the True North is, you can build a Sun Clock!
Author: Pierre Metras <[email protected]>
Based on work from Davyd Madeley, Lawrence Oluyede <[email protected]>
SVG background adapted from Open ClipArt:
http://openclipart.org/people/rihard/rihard_Clock_Calendar_2.svg
More about clocks and time in the World
---------------------------------------
- Clock face: http://en.wikipedia.org/wiki/Clock_face
- 12 hours clock: http://en.wikipedia.org/wiki/12-hour_clock
- 24 hours clock: http://en.wikipedia.org/wiki/24-hour_clock
- Thai 6 hours clock: http://en.wikipedia.org/wiki/Thai_six-hour_clock
- Time and date in the World:
http://en.wikipedia.org/wiki/Date_and_time_notation_by_country
"""
import gi
gi.require_version('Gtk', '3.0')
gi.require_version('Rsvg', '2.0')
gi.require_version('PangoCairo', '1.0')
gi.require_version('Gst', '1.0')
from gi.repository import GLib
from gi.repository import Gtk
from gi.repository import Gdk
from gi.repository import Rsvg
from gi.repository import Pango
from gi.repository import GObject
from gi.repository import PangoCairo
from gi.repository import Gst
import logging
import os
import re
import math
import cairo
import subprocess
from datetime import datetime
from gettext import gettext as _
from sugar3.graphics import style
from sugar3.activity import activity
from sugar3.activity.widgets import StopButton
from sugar3.graphics.toolbarbox import ToolbarBox
from sugar3.activity.widgets import ActivityToolbarButton
from sugar3.graphics.radiotoolbutton import RadioToolButton
from sugar3.graphics.toggletoolbutton import ToggleToolButton
from progresstoolbutton import ProgressToolButton
from speaker import Speaker
import dbus
# The display modes of the clock
_MODE_SIMPLE_CLOCK = 0
_MODE_NICE_CLOCK = 1
_MODE_DIGITAL_CLOCK = 2
# directory exists if powerd is running. create a file here,
# named after our pid, to inhibit suspend.
POWERD_INHIBIT_DIR = '/var/run/powerd-inhibit-suspend'
# Tolerance for grabbing hands, in radians. Each hand can be grabbed
# if the user press on a piece of the circle that is the angle of the
# hand +- the tolerance angle.
_ANGLE_TOLERANCE = 0.3
Gst.init(None)
class ClockActivity(activity.Activity):
"""The clock activity displays a simple clock widget.
"""
def __init__(self, handle):
"""Create and initialize the clock activity.
"""
super(ClockActivity, self).__init__(handle)
# TRANS: Title of the activity
self.set_title(_('What Time Is It?'))
# TRANS: The format used when writing the time in full
# letters. You must take care to use a font size large enough
# so that kids can read it easily, but also small enough so
# that all times combination fit on the screen, even when the
# screen is rotated. Pango markup:
# http://www.pygtk.org/docs/pygtk/pango-markup-language.html
self._TIME_LETTERS_FORMAT = _('<markup>\
<span lang="en" font_desc="Sans 20">%s</span></markup>')
# TRANS: The format used to display the weekday and date
# (example: Tuesday 10/21/2008) We recommend to use the same
# font size as for the time display. See
# http://docs.python.org/lib/module-time.html for available
# strftime formats. xgettext:no-python-format
self._DATE_SHORT_FORMAT = _('<markup>\
<span lang="en" font_desc="Sans 20">\
<span foreground="#B20008">%A</span>, \
<span foreground="#5E008C">%m</span>/\
<span foreground="#B20008">%d</span>/\
<span foreground="#9A5200">%Y</span></span></markup>')
# Should we write the time in full letters?
self._time_in_letters = self.get_title()
self._time_letters = None
self._date = None
self._time_speaker = None
self._write_time = False
self._speak_time = False
self._write_date = False
self._display_mode_buttons = []
self._ntp_process = None
self._make_display()
self._make_toolbars()
# Show the activity on the screen
self.show_all()
# We want to be notified when the minutes change
self._clock.connect("time_minute", self._minutes_changed_cb)
if not self.powerd_running():
try:
bus = dbus.SystemBus()
proxy = bus.get_object('org.freedesktop.ohm',
'/org/freedesktop/ohm/Keystore')
self.ohm_keystore = dbus.Interface(
proxy, 'org.freedesktop.ohm.Keystore')
except dbus.DBusException:
self.ohm_keystore = None
self.connect('notify::active', self._notify_active_cb)
def write_file(self, file_path):
self.metadata['write-time'] = str(self._write_time)
self.metadata['write-date'] = str(self._write_date)
self.metadata['speak-time'] = str(self._speak_time)
self.metadata['clock-mode'] = str(self._clock._mode)
self.metadata['ticking'] = str(self._clock.ticking)
logging.debug('Saving metadata %s', (self.metadata['write-time'],
self.metadata['write-date'],
self.metadata['speak-time'],
self.metadata['clock-mode'],
self.metadata['ticking']))
# Need write a empty file or the read_file is not called
with open(file_path, 'w') as data:
data.write('')
def read_file(self, file_path):
logging.debug('Reading metadata %s', (self.metadata['write-time'],
self.metadata['write-date'],
self.metadata['speak-time'],
self.metadata['clock-mode'],
self.metadata['ticking']))
if 'clock-mode' not in list(self.metadata.keys()):
display_mode = _MODE_SIMPLE_CLOCK
else:
display_mode = int(self.metadata['clock-mode'])
if 'write-time' in list(self.metadata.keys()):
self._write_time = str(self.metadata['write-time']) == 'True'
if 'speak-time' in list(self.metadata.keys()):
self._speak_time = str(self.metadata['speak-time']) == 'True'
if 'write-date' in list(self.metadata.keys()):
self._write_date = str(self.metadata['write-date']) == 'True'
if 'ticking' in list(self.metadata.keys()):
self._clock.ticking = str(self.metadata['ticking']) == 'True'
logging.debug('Read values %s', (self._write_time,
self._speak_time, self._write_date,
display_mode, self._clock.ticking))
# apply the changes in the UI
self._display_mode_buttons[display_mode].set_active(True)
self._write_time_btn.set_active(self._write_time)
self._write_date_btn.set_active(self._write_date)
self._speak_time_btn.set_active(self._speak_time)
self._ticking_btn.set_active(self._clock.ticking)
def powerd_running(self):
self.using_powerd = os.access(POWERD_INHIBIT_DIR, os.W_OK)
return self.using_powerd
def _inhibit_suspend(self):
if self.using_powerd:
fd = open(POWERD_INHIBIT_DIR + "/%u" % os.getpid(), 'w')
fd.close()
return True
if self.ohm_keystore is not None:
try:
self.ohm_keystore.SetKey('suspend.inhibit', 1)
return self.ohm_keystore.GetKey('suspend.inhibit')
except dbus.exceptions.DBusException:
return False
else:
return False
def _allow_suspend(self):
if self.using_powerd:
os.unlink(POWERD_INHIBIT_DIR + "/%u" % os.getpid())
return True
if self.ohm_keystore is not None:
try:
self.ohm_keystore.SetKey('suspend.inhibit', 0)
return self.ohm_keystore.GetKey('suspend.inhibit')
except dbus.exceptions.DBusException:
return False
else:
return False
def _make_toolbars(self):
"""Prepare and set the toolbars of the activity.
Load and show icons. Associate them to the call back methods.
"""
self.max_participants = 1
toolbar_box = ToolbarBox()
activity_button = ActivityToolbarButton(self)
activity_button.show()
toolbar_box.toolbar.insert(activity_button, 0)
self._add_clock_controls(toolbar_box.toolbar)
separator = Gtk.SeparatorToolItem()
separator.props.draw = False
separator.set_size_request(0, -1)
separator.set_expand(True)
toolbar_box.toolbar.insert(separator, -1)
stop_button = StopButton(self)
toolbar_box.toolbar.insert(stop_button, -1)
stop_button.connect('clicked', self._stop_clicked_cb)
self.set_toolbar_box(toolbar_box)
toolbar_box.show_all()
return toolbar_box
def _add_clock_controls(self, display_toolbar):
# First group of radio button to select the type of clock to display
button1 = RadioToolButton(icon_name="simple-clock")
button1.set_tooltip(_('Simple Clock'))
button1.connect("toggled", self._display_mode_changed_cb,
_MODE_SIMPLE_CLOCK)
display_toolbar.insert(button1, -1)
self._display_mode_buttons.append(button1)
button2 = RadioToolButton(icon_name="nice-clock",
group=button1)
button2.set_tooltip(_('Nice Clock'))
button2.connect("toggled", self._display_mode_changed_cb,
_MODE_NICE_CLOCK)
display_toolbar.insert(button2, -1)
self._display_mode_buttons.append(button2)
button3 = RadioToolButton(icon_name="digital-clock",
group=button1)
button3.set_tooltip(_('Digital Clock'))
button3.connect("toggled", self._display_mode_changed_cb,
_MODE_DIGITAL_CLOCK)
display_toolbar.insert(button3, -1)
self._display_mode_buttons.append(button3)
# A separator between the two groups of buttons
self._add_separator(display_toolbar)
# Now the options buttons to display other elements: date, day
# of week... A button in the toolbar to write the time in
# full letters
self._write_time_btn = ToggleToolButton("write-time")
self._write_time_btn.set_tooltip(_('Display time in full letters'))
self._write_time_btn.connect("toggled", self._write_time_clicked_cb)
display_toolbar.insert(self._write_time_btn, -1)
# The button to display the weekday and date
self._write_date_btn = ToggleToolButton("write-date")
self._write_date_btn.set_tooltip(_('Display weekday and date'))
self._write_date_btn.connect("toggled", self._write_date_clicked_cb)
display_toolbar.insert(self._write_date_btn, -1)
# Another button to speak aloud the time
self._speak_time_btn = ToggleToolButton("microphone")
self._speak_time_btn.set_tooltip(_('Talking clock'))
self._speak_time_btn.connect("toggled", self._speak_time_clicked_cb)
display_toolbar.insert(self._speak_time_btn, -1)
# Another button to toggle tick
self._ticking_btn = ToggleToolButton("ticking")
self._ticking_btn.set_tooltip(_('Ticking clock'))
self._ticking_btn.connect("toggled", self._ticking_toggled_cb)
display_toolbar.insert(self._ticking_btn, -1)
# A separator between the two groups of buttons
self._add_separator(display_toolbar)
# And another button to toggle grabbing the hands
self._grab_button = ToggleToolButton("grab")
self._grab_button.set_tooltip(_('Grab the hands'))
self._grab_button.connect("toggled", self._grab_clicked_cb)
display_toolbar.insert(self._grab_button, -1)
if os.access('/boot/olpc_build', os.R_OK) and \
os.access('/usr/sbin/ntpdate', os.R_OK):
self._add_separator(display_toolbar)
self._ntp_button = ProgressToolButton(icon_name="emblem-downloads")
self._ntp_button.set_tooltip(_('Download time'))
self._ntp_button.connect("clicked", self._ntp_clicked_cb)
self._ntp_button.update(0.05)
display_toolbar.insert(self._ntp_button, -1)
def _add_separator(self, display_toolbar):
separator = Gtk.SeparatorToolItem()
separator.set_draw(True)
display_toolbar.insert(separator, -1)
def _make_display(self):
"""Prepare the display of the clock.
The display has two parts: the clock face at the top, and the
time in full letters at the bottom, when the user selects to
show it.
"""
# The clock face
self._clock = ClockFace()
# The label to print the time in full letters
self._time_letters = Gtk.Label()
self._time_letters.set_no_show_all(True)
# Following line in ineffective!
# self._time_letters.set_line_wrap(True)
# Resize the invisible label so that Gtk will know in advance
# the height when we show it.
self._time_letters.set_markup(
self._TIME_LETTERS_FORMAT % self._time_in_letters)
# The label to write the date
self._date = Gtk.Label()
self._date.set_no_show_all(True)
self._date.set_markup(
self._clock.get_time().strftime(self._DATE_SHORT_FORMAT))
# Put all these widgets in a vertical box
vbox = Gtk.VBox()
vbox.pack_start(self._clock, True, True, 0)
vbox.pack_start(self._time_letters, False, False, 0)
vbox.pack_start(self._date, False, False, 0)
# Attach the display to the activity
self.set_canvas(vbox)
self._clock.active = True
def _write_date_clicked_cb(self, button):
"""The user clicked on the "write date" button to display the
current weekday and date.
"""
self._write_date = button.get_active()
if button.get_active():
self._date.show()
else:
self._date.hide()
def _display_mode_changed_cb(self, radiobutton, display_mode):
"""The user selected a clock display mode (simple clock, nice
or digital).
"""
self._clock.set_display_mode(display_mode)
self._clock.queue_draw()
is_digital = display_mode == _MODE_DIGITAL_CLOCK
# Exit grab hands mode if the clock is digital
if self._clock.grab_hands_mode and is_digital:
self._grab_button.set_active(False)
# The hands can't be grabbed in the digital clock mode
self._grab_button.props.sensitive = not is_digital
def _write_time_clicked_cb(self, button):
"""The user clicked on the "write time" button to print the
current time.
"""
self._write_time = button.get_active()
if self._write_time:
self._time_letters.show()
self._write_and_speak(False)
else:
self._time_letters.hide()
def _speak_time_clicked_cb(self, button):
"""The user clicked on the "speak time" button to hear the
talking clock.
"""
self._speak_time = button.get_active()
self._write_and_speak(self._speak_time)
def _ticking_toggled_cb(self, button):
"""The user clicked on the "ticking clock" button to hear or
not hear the clock ticking. """
self._clock.ticking = button.get_active()
def _grab_clicked_cb(self, button):
"""The user clicked on the "grab hands" button to toggle
grabbing the hands.
"""
self._clock.change_grab_hands_mode(button.get_active())
def _minutes_changed_cb(self, clock):
"""Minutes have changed on the clock face: we have to update
the display of the time in full letters if the user has chosen
to have it and eventually croak the time.
"""
# Change time display and talk, if necessary
self._write_and_speak(True)
# Update the weekday and date in case it was midnight
self._date.set_markup(
clock.get_time().strftime(self._DATE_SHORT_FORMAT))
def _notify_active_cb(self, widget, pspec):
"""Sugar notify us that the activity is becoming active or
inactive.
When we are inactive, we change the activity status of the
clock face widget, so that it can stop updating every seconds.
"""
self._clock.active = self.props.active
if self.props.active:
self._inhibit_suspend()
else:
self._allow_suspend()
def _write_and_speak(self, speak):
# Only update the time in full letters when necessary
if self._write_time or self._speak_time:
self._do_write_time()
# And if requested, say it aloud
if self._speak_time and speak:
GObject.idle_add(self._do_speak_time)
def _do_write_time(self):
"""Translate the time to full letters.
"""
hour = self._clock.get_time().hour
minute = self._clock.get_time().minute
# TRANS: Hour, referring to the unit of time. This list
# iterates through each unit of the 12-hour clock twice in
# word form so one AM would have the same translation as one PM.
hours = [_('twelve'), _('one'), _('two'), _('three'), _('four'),
_('five'), _('six'), _('seven'), _('eight'), _('nine'),
_('ten'), _('eleven'), _('twelve'), _('one'), _('two'),
_('three'), _('four'), _('five'), _('six'), _('seven'),
_('eight'), _('nine'), _('ten'), _('eleven')]
# TRANS: Minute, referring to the unit of time. This list
# iterates through 60 minutes in word form.
minutes = [_('one'), _('two'), _('three'), _('four'), _('five'),
_('six'), _('seven'), _('eight'), _('nine'), _('ten'),
_('eleven'), _('twelve'), _('thirteen'), _('fourteen'),
_('fifteen'), _('sixteen'), _('seventeen'), _('eighteen'),
_('nineteen'), _('twenty'), _('twenty-one'),
_('twenty-two'), _('twenty-three'), _('twenty-four'),
_('twenty-five'), _('twenty-six'), _('twenty-seven'),
_('twenty-eight'), _('twenty-nine'), _('thirty'),
_('thirty-one'), _('thirty-two'), _('thirty-three'),
_('thirty-four'), _('thirty-five'), _('thirty-six'),
_('thirty-seven'), _('thirty-eight'), _('thirty-nine'),
_('forty'), _('forty-one'), _('forty-two'),
_('forty-three'), _('forty-four'), _('forty-five'),
_('forty-six'), _('forty-seven'), _('forty-eight'),
_('forty-nine'), _('fifty'), _('fifty-one'),
_('fifty-two'), _('fifty-three'), _('fifty-four'),
_('fifty-five'), _('fifty-six'), _('fifty-seven'),
_('fifty-eight'), _('fifty-nine'), _('sixty')]
# TRANS: "o clock", used after a number from one to twelve to
# indicate the hour of the day or night, eg. "one o clock PM"
oClock = _('o clock')
# TRANS: AM or PM, referring to morning (before 12PM) or
# afternoon (12PM and after).
period = [_('AM'), _('PM')]
if hour < 12:
periodHour = 0
else:
periodHour = 1
if hour == 12 and minute == 0:
# TRANS: "Noon", as in afternoon 12PM
self._time_in_letters = (
'<markup><span lang="en" font_desc="Sans 20">' +
'<span foreground="#005FE4">' + _('noon') +
'</span></span></markup>')
elif hour == 0 and minute == 0:
# TRANS: "Midnight", as in morning 12AM
self._time_in_letters = (
'<markup><span lang="en" font_desc="Sans 20">' +
'<span foreground="#005FE4">' +
_('midnight') + '</span></span></markup>')
elif minute == 0:
# TRANS: Use "hour o clock period" when minute == 0,
# eg. "one o clock PM"
self._time_in_letters = (
'<markup><span lang="en" font_desc="Sans 20">' +
_('<span foreground="#005FE4">%(hour)s</span>' +
'<span foreground="#00B20D"> %(minute)s</span>' +
'<span foreground="#B20008"> %(period)s</span>') +
'</span></markup>') % {'hour': hours[hour],
'minute': oClock,
'period': period[periodHour]}
else:
# TRANS: This takes on the format of "hour minute period",
# eg. "one forty AM"
self._time_in_letters = (
'<markup><span lang="en" font_desc="Sans 20">' +
_('<span foreground="#005FE4">%(hour)s</span>' +
'<span foreground="#00B20D"> %(minute)s</span>' +
'<span foreground="#B20008"> %(period)s</span>') +
'</span></markup>') % {'hour': hours[hour],
'minute': minutes[minute - 1],
'period': period[periodHour]}
self._time_letters.set_markup(
self._TIME_LETTERS_FORMAT % self._time_in_letters)
def _do_speak_time(self):
"""Speak aloud the current time.
"""
if self._time_speaker is None:
self._time_speaker = Speaker()
self._time_speaker.speak(self._untag(self._time_in_letters))
def _untag(self, text):
"""Remove all the tags (pango markup) from a text.
"""
if text is False or "<" not in text:
return text
else:
result = ""
for s in re.findall(r"(<.*?>)|([^<>]+)", text):
result += s[1]
return result
def _ntp_clicked_cb(self, button):
if self._ntp_process:
return
args = ["su", "-c", "/usr/sbin/ntpdate -u pool.ntp.org"]
self._ntp_process = subprocess.Popen(args, bufsize=-1,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
self._ntp_counter = 0
GObject.timeout_add(100, self._ntpdate_poll_cb)
button.update(0.1)
button.set_tooltip(_('Download time began'))
def _ntpdate_poll_cb(self):
if self._ntp_process.poll() is None:
self._ntp_counter += 1
self._ntp_button.update(0.1 + (self._ntp_counter / 90.0))
return True
if self._ntp_process.returncode:
data = self._ntp_process.communicate()
logging.error('Download time failed (%d), %r',
self._ntp_process.returncode,
repr(data))
self._ntp_button.update(0.05)
self._ntp_button.set_tooltip(_('Download time failed (%d)') %
self._ntp_process.returncode)
return False
args = ["su", "-c", "/usr/sbin/hwclock --systohc"]
self._ntp_process = subprocess.Popen(args, bufsize=-1,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
self._ntp_counter = 0
GObject.timeout_add(100, self._hwclock_poll_cb)
return False
def _hwclock_poll_cb(self):
if self._ntp_process.poll() is None:
self._ntp_counter += 1
self._ntp_button.update(0.1 + (self._ntp_counter / 20.0))
self._ntp_button.set_tooltip(_('Setting time in progress'))
return True
if self._ntp_process.returncode:
data = self._ntp_process.communicate()
logging.error('Setting time failed (%d), %r',
self._ntp_process.returncode,
repr(data))
self._ntp_button.update(1.0)
self._ntp_button.set_tooltip(_('Download time done'))
GObject.timeout_add(1000, self._ntp_disable_cb)
return False
def _ntp_disable_cb(self):
self._ntp_button.update(0.0)
self._ntp_button.set_sensitive(False)
return False
def _stop_clicked_cb(self, button):
self._clock.active = False
class ClockFace(Gtk.DrawingArea):
"""The Pango widget of the clock.
This widget draws a simple analog clock, with 3 hands (hours,
minutes and seconds) or a digital clock. Depending on the display
mode, different information is displayed.
"""
def __init__(self):
"""Initialize the clock widget.
The mode defaults to the basic analog clock, with no hours
mark or date.
"""
super(ClockFace, self).__init__()
# Set to True when the variables to draw the clock are set:
self.initialized = False
self._simple_background_cache = None
self._nice_background_cache = None
# The time on the clock face
self._time = datetime.now()
self._old_minute = self._time.minute
# Update the clock only when the widget is active to save
# resource
self._active = False
self._ticking = False
self._update_id = None
# The display mode of the clock
self._mode = _MODE_SIMPLE_CLOCK
# Cache for the simple clock face background
self._simple_background_cache = None
# SVG Background handle
self._svg_handle = None
# This are calculated on widget resize
self._center_x = 0
self._center_y = 0
self._radius = -1
self._line_width = 2
self._hand_sizes = {}
self._hand_angles = {}
# Color codes (approved colors for Sugar)
# Medium Blue
self._COLOR_HOURS = "#005FE4"
# Medium Green
self._COLOR_MINUTES = "#00B20D"
# Medium Red
self._COLOR_SECONDS = "#E6000A"
# White
self._COLOR_WHITE = "#FFFFFF"
# Black
self._COLOR_BLACK = "#000000"
# Gtk.Widget signals
self.connect("draw", self._draw_cb)
self.connect("size-allocate", self._size_allocate_cb)
# The masks to capture the events we are interested in
self.add_events(Gdk.EventMask.EXPOSURE_MASK |
Gdk.EventMask.VISIBILITY_NOTIFY_MASK |
Gdk.EventMask.BUTTON_PRESS_MASK |
Gdk.EventMask.BUTTON_RELEASE_MASK |
Gdk.EventMask.BUTTON1_MOTION_MASK)
# Define a new signal to notify the application when minutes
# change. If the user wants to display the time in full
# letters, the method of the activity will be called back to
# refresh the display.
GObject.signal_new("time_minute", ClockFace,
GObject.SIGNAL_RUN_LAST,
GObject.TYPE_NONE, [])
# This flag is True if the clock is in grab hands mode
self.grab_hands_mode = False
# When grabbing a hand, this is the name of the hand. If
# None, it means that no hand is being grabbed
self._hand_being_grabbed = None
# Event handlers for grabbing the hands.
self._press_id = None
self._motion_id = None
self._release_id = None
# This can be 'AM' or 'PM' to distinguish the user set time
# while grabbing the hands of the clock
self._am_pm = 'AM'
self.am_pm_width = 0
self.am_pm_height = 0
def set_display_mode(self, mode):
"""Set the type of clock to display (simple, nice, digital).
'mode' is one of MODE_XXX_CLOCK constants.
"""
self._mode = mode
def _size_allocate_cb(self, widget, allocation):
"""We know the size of the widget on the screen, so we keep
the parameters which are important for our rendering (center
of the clock, radius).
"""
# This callback can be called when the gdk window is not yet
# set
# Store the measures of the clock face widget
self._center_x = int(allocation.width / 2.0)
self._center_y = int(allocation.height / 2.0)
self._radius = max(min(int(allocation.width / 2.0),
int(allocation.height / 2.0)) - 20, 0)
self._line_width = int(self._radius / 150)
# lean ackground caches
self._simple_background_cache = None
self._nice_background_cache = None
# The hands sizes are proportional to the radius
self._hand_sizes['hour'] = self._radius * 0.5
self._hand_sizes['minutes'] = self._radius * 0.8
self._hand_sizes['seconds'] = self._radius * 0.7
self.initialized = True
def _draw_cb(self, widget, cr):
"""The widget is exposed and must draw itself on the graphic
context.
In GTK+, widgets are double-buffered. It means that an
off-screen buffer is automatically created to draw on it
before the expose event is called and it prevents the screen
from flickering.
"""
if not self.initialized:
self.queue_resize()
if self._mode == _MODE_NICE_CLOCK:
if self._nice_background_cache is None:
# Reload the svg handle
self._svg_handle = Rsvg.Handle.new_from_file("clock.svg")
# Draw nice clock background
self._nice_background_cache = \
cr.get_target().create_similar(
cairo.CONTENT_COLOR_ALPHA, self._radius * 2,
self._radius * 2)
cache_ctx = cairo.Context(self._nice_background_cache)
scale_x = self._radius * 2.0 / self._svg_handle.props.width
scale_y = self._radius * 2.0 / self._svg_handle.props.height
matrix = cairo.Matrix(xx=scale_x, yy=scale_y)
cache_ctx.transform(matrix)
self._svg_handle.render_cairo(cache_ctx)
self._draw_nice_clock(cr)
elif self._mode == _MODE_SIMPLE_CLOCK:
if self._simple_background_cache is None:
# Draw simple clock background
logging.debug('init background cache radius %s', self._radius)
self._simple_background_cache = cr.get_target().create_similar(
cairo.CONTENT_COLOR_ALPHA, self._radius * 2,
self._radius * 2)
cache_ctx = cairo.Context(self._simple_background_cache)
self._draw_simple_background(cache_ctx)
self._draw_numbers(cache_ctx)
self._draw_simple_clock(cr)
elif self._mode == _MODE_DIGITAL_CLOCK:
self._draw_digital_clock(cr)
else:
msg = "Unknown display mode: %d." % self._mode
raise ValueError(msg)
return False
def _draw_digital_clock(self, cr):
"""Draw the digital clock.
"""
self._draw_time_scale(cr)
self._draw_time(cr)
def _draw_time_scale(self, cr):
"""Draw a time scale for digital clock.
"""
# Draw scales of hours, minutes and seconds, to give the children
# an appreciation of the time flowing...
cr.save()
hours_length = 2 * self._radius / 24 * self._time.hour
minutes_length = 2 * self._radius / 60 * self._time.minute
seconds_length = 2 * self._radius / 60 * self._time.second
# Fill background
cr.set_source_rgba(*style.Color(self._COLOR_WHITE).get_rgba())
cr.rectangle(round(self._center_x - 1.1 * self._radius),
round(self._center_y - 0.85 * self._radius),
round(2.2 * self._radius),
round(0.65 * self._radius))
cr.fill()
h = round(0.15 * self._radius)
x = round(self._center_x - self._radius)
# Hours scale
cr.set_source_rgba(*style.Color(self._COLOR_HOURS).get_rgba())
y = round(self._center_y - 0.75 * self._radius)
cr.rectangle(x, y, hours_length, h)
cr.fill()
# Minutes scale
cr.set_source_rgba(*style.Color(self._COLOR_MINUTES).get_rgba())
y = round(self._center_y - 0.60 * self._radius)
cr.rectangle(x, y, minutes_length, h)
cr.fill()
# Seconds scale
cr.set_source_rgba(*style.Color(self._COLOR_SECONDS).get_rgba())
y = round(self._center_y - 0.45 * self._radius)
cr.rectangle(x, y, seconds_length, h)
cr.fill()
cr.restore()
def _draw_time(self, cr):
"""Draw the time in colors (digital display).
"""
# TRANS: The format used to display the time for digital clock
# You can add AM/PM indicator or use 12/24 format, for example
# "%I:%M:%S %p". See
# http://docs.python.org/lib/module-time.html for available
# strftime formats If the display of the time is moving
# horizontally, it means that the glyphs of the digits used in
# the font don't have the same width. Try to use a Monospace
# font. xgettext:no-python-format
cr.save()
markup = _('<markup>\
<span lang="en" font_desc="Sans,Monospace Bold 96">\
<span foreground="#005FE4">%I</span>:\
<span foreground="#00B20D">%M</span>:\
<span foreground="#E6000A">%S</span>%p</span></markup>')
markup_time = self._time.strftime(markup)
cr.set_source_rgba(*style.Color(self._COLOR_BLACK).get_rgba())
pango_layout = PangoCairo.create_layout(cr)
d = int(self._center_y + 0.3 * self._radius)
pango_layout.set_markup(markup_time)
dx, dy = pango_layout.get_pixel_size()
pango_layout.set_alignment(Pango.Alignment.CENTER)
cr.translate(self._center_x - dx / 2.0, d - dy / 2.0)
PangoCairo.update_layout(cr, pango_layout)
PangoCairo.show_layout(cr, pango_layout)
cr.restore()
def _draw_simple_clock(self, cr):
"""Draw the simple clock variants.
"""
# Can be called before the cache is ready
if self._simple_background_cache is None:
return
cr.save()
# Place the simple background
cr.translate(self._center_x - self._radius,
self._center_y - self._radius)
cr.set_source_surface(self._simple_background_cache)
cr.paint()
cr.restore()
self._draw_hands(cr)
def _draw_simple_background(self, cr):
"""Draw the background of the simple clock.
The simple clock background is a white disk, with hours and minutes
ticks, and the hour numbers.
"""
cr.save()
cr.set_line_width(4 * self._line_width)
cr.set_line_cap(cairo.LINE_CAP_ROUND)
# Simple clock background
cr.set_source_rgba(*style.Color(self._COLOR_WHITE).get_rgba())
cr.arc(self._radius, self._radius, self._radius - self._line_width * 2,
0, 2 * math.pi)
cr.fill_preserve()
cr.set_source_rgba(*style.Color(self._COLOR_BLACK).get_rgba())
cr.stroke()
# Clock ticks
for i in range(60):
if i % 15 == 0:
inset = 0.11 * self._radius
cr.set_line_width(7 * self._line_width)
elif i % 5 == 0:
inset = 0.1 * self._radius
cr.set_line_width(5 * self._line_width)
else:
inset = 0.05 * self._radius
cr.set_line_width(4 * self._line_width)
cos = math.cos(i * math.pi / 30.0)
sin = math.sin(i * math.pi / 30.0)
cr.move_to(int(self._radius + (self._radius - inset) * cos),
int(self._radius + (self._radius - inset) * sin))
cr.line_to(int(self._radius + (self._radius - 6) * cos),
int(self._radius + (self._radius - 6) * sin))
cr.stroke()
cr.restore()
def _draw_nice_background(self, cr):
"""Draw the nice clock background.
The background has been loaded from the clock.svg file to a
rsvg handle, and we just transform this handle and render it
with cairo.
"""
cr.save()
cr.translate(self._center_x - self._radius,
self._center_y - self._radius)
cr.set_source_surface(self._nice_background_cache)
cr.paint()
cr.restore()
def _draw_nice_clock(self, cr):
"""Draw the nice clock.
"""
cr.save()
self._draw_nice_background(cr)