sugar-toolkit-gtk3/shell/view/home/activitiesdonut.py

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2007-06-24 14:45:05 +02:00
# Copyright (C) 2006-2007 Red Hat, Inc.
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#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
import colorsys
from gettext import gettext as _
import logging
import math
import hippo
import gobject
import gtk
from sugar.graphics.canvasicon import CanvasIcon
from sugar.graphics.menuitem import MenuItem
from sugar.graphics.palette import Palette
from sugar.graphics import style
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from sugar.graphics import xocolor
from sugar import profile
# TODO: rgb_to_html and html_to_rgb are useful elsewhere
# we should put this in a common module
def rgb_to_html(r, g, b):
""" (r, g, b) tuple (in float format) -> #RRGGBB """
return '#%02x%02x%02x' % (int(r * 255), int(g * 255), int(b * 255))
def html_to_rgb(html_color):
""" #RRGGBB -> (r, g, b) tuple (in float format) """
html_color = html_color.strip()
if html_color[0] == '#':
html_color = html_color[1:]
if len(html_color) != 6:
raise ValueError, "input #%s is not in #RRGGBB format" % html_color
r, g, b = html_color[:2], html_color[2:4], html_color[4:]
r, g, b = [int(n, 16) for n in (r, g, b)]
r, g, b = (r / 255.0, g / 255.0, b / 255.0)
return (r, g, b)
class ActivityIcon(CanvasIcon):
_INTERVAL = 250
__gsignals__ = {
'resume': (gobject.SIGNAL_RUN_FIRST,
gobject.TYPE_NONE, ([])),
'stop': (gobject.SIGNAL_RUN_FIRST,
gobject.TYPE_NONE, ([]))
}
def __init__(self, activity):
icon_name = activity.get_icon_name()
self._orig_color = activity.get_icon_color()
self._icon_colors = self._compute_icon_colors()
self._direction = 0
self._level_max = len(self._icon_colors) - 1
self._level = self._level_max
color = self._icon_colors[self._level]
CanvasIcon.__init__(self, icon_name=icon_name, xo_color=color,
size=style.MEDIUM_ICON_SIZE, cache=True)
self._activity = activity
self._pulse_id = 0
palette = Palette(_('Starting...'))
self.set_palette(palette)
activity.connect('notify::launching', self._launching_changed_cb)
if activity.props.launching:
self._start_pulsing()
else:
self._setup_palette()
def _setup_palette(self):
palette = self.get_palette()
palette.set_primary_text(self._activity.get_title())
resume_menu_item = MenuItem(_('Resume'), 'zoom-activity')
resume_menu_item.connect('activate', self._resume_activate_cb)
palette.menu.append(resume_menu_item)
resume_menu_item.show()
# FIXME: kludge
if self._activity.get_type() != "org.laptop.JournalActivity":
stop_menu_item = MenuItem(_('Stop'), 'activity-stop')
stop_menu_item.connect('activate', self._stop_activate_cb)
palette.menu.append(stop_menu_item)
stop_menu_item.show()
def _launching_changed_cb(self, activity, pspec):
if activity.props.launching:
self._start_pulsing()
else:
self._stop_pulsing()
self._setup_palette()
def __del__(self):
self._cleanup()
def _cleanup(self):
if self._pulse_id:
gobject.source_remove(self._pulse_id)
self._pulse_id = 0
# dispose of all rendered icons from launch feedback
self._clear_buffers()
def _compute_icon_colors(self):
_LEVEL_MAX = 1.6
_LEVEL_STEP = 0.16
_LEVEL_MIN = 0.0
icon_colors = {}
level = _LEVEL_MIN
for i in range(0, int(_LEVEL_MAX / _LEVEL_STEP)):
icon_colors[i] = self._get_icon_color_for_level(level)
level += _LEVEL_STEP
return icon_colors
def _get_icon_color_for_level(self, level):
factor = math.sin(level)
h, s, v = colorsys.rgb_to_hsv(*html_to_rgb(self._orig_color.get_fill_color()))
new_fill = rgb_to_html(*colorsys.hsv_to_rgb(h, s * factor, v))
h, s, v = colorsys.rgb_to_hsv(*html_to_rgb(self._orig_color.get_stroke_color()))
new_stroke = rgb_to_html(*colorsys.hsv_to_rgb(h, s * factor, v))
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return xocolor.XoColor("%s,%s" % (new_stroke, new_fill))
def _pulse_cb(self):
if self._direction == 1:
self._level += 1
if self._level > self._level_max:
self._direction = 0
self._level = self._level_max
elif self._direction == 0:
self._level -= 1
if self._level <= 0:
self._direction = 1
self._level = 0
self.props.xo_color = self._icon_colors[self._level]
self.emit_paint_needed(0, 0, -1, -1)
return True
def _start_pulsing(self):
if self._pulse_id:
return
self._pulse_id = gobject.timeout_add(self._INTERVAL, self._pulse_cb)
def _stop_pulsing(self):
if not self._pulse_id:
return
self._cleanup()
self._level = 100.0
self.props.xo_color = self._orig_color
# Force the donut to redraw now that we know how much memory
# the activity is using.
self.emit_request_changed()
def _resume_activate_cb(self, menuitem):
self.emit('resume')
def _stop_activate_cb(self, menuitem):
self.emit('stop')
def get_activity(self):
return self._activity
class ActivitiesDonut(hippo.CanvasBox, hippo.CanvasItem):
__gtype_name__ = 'SugarActivitiesDonut'
def __init__(self, shell, **kwargs):
hippo.CanvasBox.__init__(self, **kwargs)
self._activities = []
self._shell = shell
self._angles = []
self._model = shell.get_model().get_home()
self._model.connect('activity-added', self._activity_added_cb)
self._model.connect('activity-removed', self._activity_removed_cb)
self._model.connect('pending-activity-changed', self._activity_changed_cb)
self.connect('button-release-event', self._button_release_event_cb)
def _get_icon_from_activity(self, activity):
for icon in self._activities:
if icon.get_activity().equals(activity):
return icon
def _activity_added_cb(self, model, activity):
self._add_activity(activity)
def _activity_removed_cb(self, model, activity):
self._remove_activity(activity)
def _activity_changed_cb(self, model, activity):
self.emit_paint_needed(0, 0, -1, -1)
def _remove_activity(self, activity):
icon = self._get_icon_from_activity(activity)
if icon:
self.remove(icon)
icon._cleanup()
self._activities.remove(icon)
def _add_activity(self, activity):
icon = ActivityIcon(activity)
icon.connect('resume', self._activity_icon_resumed_cb)
icon.connect('stop', self._activity_icon_stop_cb)
self.append(icon, hippo.PACK_FIXED)
self._activities.append(icon)
self.emit_paint_needed(0, 0, -1, -1)
def _activity_icon_resumed_cb(self, icon):
activity = icon.get_activity()
activity_host = self._shell.get_activity(activity.get_activity_id())
if activity_host:
activity_host.present()
else:
logging.error("Could not find ActivityHost for activity %s" %
activity.get_activity_id())
def _activity_icon_stop_cb(self, icon):
activity = icon.get_activity()
activity_host = self._shell.get_activity(activity.get_activity_id())
if activity_host:
activity_host.close()
else:
logging.error("Could not find ActivityHost for activity %s" %
activity.get_activity_id())
def _get_activity(self, x, y):
# Compute the distance from the center.
[width, height] = self.get_allocation()
x -= width / 2
y -= height / 2
r = math.hypot(x, y)
# Ignore the click if it's not inside the donut
if r < self._get_inner_radius() or r > self._get_radius():
return None
# Now figure out where in the donut the click was.
angle = math.atan2(-y, -x) + math.pi
# Unfortunately, _get_angles() doesn't count from 0 to 2pi, it
# counts from roughly pi/2 to roughly 5pi/2. So we have to
# compare its return values against both angle and angle+2pi
high_angle = angle + 2 * math.pi
for index, activity in enumerate(self._model):
[angle_start, angle_end] = self._get_angles(index)
if angle_start < angle and angle_end > angle:
return activity
elif angle_start < high_angle and angle_end > high_angle:
return activity
return None
def _button_release_event_cb(self, item, event):
activity = self._get_activity(event.x, event.y)
if activity is None:
return False
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activity_host = self._shell.get_activity(activity.get_activity_id())
if activity_host:
activity_host.present()
return True
MAX_ACTIVITIES = 10
MIN_ACTIVITY_WEDGE_SIZE = 1.0 / MAX_ACTIVITIES
def _get_activity_sizes(self):
# First get the size of each process that hosts an activity,
# and the number of activities it hosts.
process_size = {}
num_activities = {}
total_activity_size = 0
for activity in self._model:
pid = activity.get_pid()
if not pid:
# Still starting up, hasn't opened a window yet
continue
if process_size.has_key(pid):
num_activities[pid] += 1
continue
try:
statm = open('/proc/%s/statm' % pid)
# We use "RSS" (the second field in /proc/PID/statm)
# for the activity size because that's what ps and top
# use for calculating "%MEM". We multiply by 4 to
# convert from pages to kb.
process_size[pid] = int(statm.readline().split()[1]) * 4
total_activity_size += process_size[pid]
num_activities[pid] = 1
statm.close()
except IOError:
logging.warn('ActivitiesDonut: could not read /proc/%s/statm' %
pid)
except (IndexError, ValueError):
logging.warn('ActivitiesDonut: /proc/%s/statm was not in ' +
'expected format' % pid)
# Next, see how much free memory is left.
free_memory = 0
try:
meminfo = open('/proc/meminfo')
for line in meminfo.readlines():
if line.startswith('MemFree:') or line.startswith('SwapFree:'):
free_memory += int(line[9:-3])
meminfo.close()
except IOError:
logging.warn('ActivitiesDonut: could not read /proc/meminfo')
except (IndexError, ValueError):
logging.warn('ActivitiesDonut: /proc/meminfo was not in ' +
'expected format')
# Each activity starts with MIN_ACTIVITY_WEDGE_SIZE. The
# remaining space in the donut is allocated proportionately
# among the activities-of-known-size and the free space
used_space = ActivitiesDonut.MIN_ACTIVITY_WEDGE_SIZE * len(self._model)
remaining_space = max(0.0, 1.0 - used_space)
total_memory = total_activity_size + free_memory
activity_sizes = []
for activity in self._model:
percent = ActivitiesDonut.MIN_ACTIVITY_WEDGE_SIZE
pid = activity.get_pid()
if process_size.has_key(pid):
size = process_size[pid] / num_activities[pid]
percent += remaining_space * size / total_memory
activity_sizes.append(percent)
return activity_sizes
def _compute_angles(self):
percentages = self._get_activity_sizes()
self._angles = []
if len(percentages) == 0:
return
# The first wedge (Journal) should be centered at 6 o'clock
size = percentages[0] * 2 * math.pi
angle = (math.pi - size) / 2
self._angles.append(angle)
for size in percentages:
self._angles.append(self._angles[-1] + size * 2 * math.pi)
def _get_angles(self, index):
return [self._angles[index],
self._angles[(index + 1) % len(self._angles)]]
def _get_radius(self):
[width, height] = self.get_allocation()
return min(width, height) / 2
def _get_inner_radius(self):
return self._get_radius() * 0.5
def do_paint_below_children(self, cr, damaged_box):
[width, height] = self.get_allocation()
cr.translate(width / 2, height / 2)
radius = self._get_radius()
# Outer Ring
cr.set_source_rgb(0xf1 / 255.0, 0xf1 / 255.0, 0xf1 / 255.0)
cr.arc(0, 0, radius, 0, 2 * math.pi)
cr.fill()
# Selected Wedge
current_activity = self._model.get_pending_activity()
if current_activity is not None:
selected_index = self._model.index(current_activity)
[angle_start, angle_end] = self._get_angles(selected_index)
cr.new_path()
cr.move_to(0, 0)
cr.line_to(radius * math.cos(angle_start),
radius * math.sin(angle_start))
cr.arc(0, 0, radius, angle_start, angle_end)
cr.line_to(0, 0)
cr.set_source_rgb(1, 1, 1)
cr.fill()
# Edges
if len(self._model):
n_edges = len(self._model) + 1
else:
n_edges = 0
for i in range(0, n_edges):
cr.new_path()
cr.move_to(0, 0)
[angle, unused_angle] = self._get_angles(i)
cr.line_to(radius * math.cos(angle),
radius * math.sin(angle))
cr.set_source_rgb(0xe2 / 255.0, 0xe2 / 255.0, 0xe2 / 255.0)
cr.set_line_width(4)
cr.stroke_preserve()
# Inner Ring
cr.new_path()
cr.arc(0, 0, self._get_inner_radius(), 0, 2 * math.pi)
cr.set_source_rgb(0xe2 / 255.0, 0xe2 / 255.0, 0xe2 / 255.0)
cr.fill()
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def do_allocate(self, width, height, origin_changed):
hippo.CanvasBox.do_allocate(self, width, height, origin_changed)
radius = (self._get_inner_radius() + self._get_radius()) / 2
self._compute_angles()
for i, icon in enumerate(self._activities):
[angle_start, angle_end] = self._get_angles(i)
angle = angle_start + (angle_end - angle_start) / 2
[icon_width, icon_height] = icon.get_allocation()
x = int(radius * math.cos(angle)) - icon_width / 2
y = int(radius * math.sin(angle)) - icon_height / 2
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self.set_position(icon, x + width / 2, y + height / 2)