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