sugar-toolkit-gtk3/lib/sugar/activity/activity.py

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"""Base class for activities written in Python
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This is currently the only definitive reference for what an
activity must do to participate in the Sugar desktop.
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A Basic Activity
All activities must implement a class derived from 'Activity' in this class.
The convention is to call it ActivitynameActivity, but this is not required as
the activity.info file associated with your activity will tell the sugar-shell
which class to start.
For example the most minimal Activity:
from sugar.activity import activity
class ReadActivity(activity.Activity):
pass
To get a real, working activity, you will at least have to implement:
__init__(), read_file() and write_file()
Aditionally, you will probably need a at least a Toolbar so you can have some
interesting buttons for the user, like for example 'exit activity'
See the methods of the Activity class below for more information on what you
will need for a real activity.
"""
# Copyright (C) 2006-2007 Red Hat, Inc.
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#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the
# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.
from gettext import gettext as _
import logging
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import os
import time
import tempfile
from hashlib import sha1
import traceback
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import gtk, gobject
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import dbus
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import dbus.service
import json
from sugar import util
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from sugar.presence import presenceservice
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from sugar.activity.activityservice import ActivityService
from sugar.graphics import style
from sugar.graphics.window import Window
from sugar.graphics.toolbox import Toolbox
from sugar.graphics.toolbutton import ToolButton
from sugar.graphics.toolcombobox import ToolComboBox
from sugar.graphics.alert import Alert
from sugar.graphics.icon import Icon
from sugar.datastore import datastore
from sugar import wm
from sugar import profile
from sugar import _sugarbaseext
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from sugar import _sugarext
SCOPE_PRIVATE = "private"
SCOPE_INVITE_ONLY = "invite" # shouldn't be shown in UI, it's implicit when you invite somebody
SCOPE_NEIGHBORHOOD = "public"
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J_DBUS_SERVICE = 'org.laptop.Journal'
J_DBUS_PATH = '/org/laptop/Journal'
J_DBUS_INTERFACE = 'org.laptop.Journal'
class ActivityToolbar(gtk.Toolbar):
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"""The Activity toolbar with the Journal entry title, sharing, Keep and Stop buttons
All activities should have this toolbar. It is easiest to add it to your
Activity by using the ActivityToolbox.
"""
def __init__(self, activity):
gtk.Toolbar.__init__(self)
self._activity = activity
self._updating_share = False
activity.connect('shared', self.__activity_shared_cb)
activity.connect('joined', self.__activity_shared_cb)
activity.connect('notify::max_participants',
self.__max_participants_changed_cb)
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if activity.metadata:
self.title = gtk.Entry()
self.title.set_size_request(int(gtk.gdk.screen_width() / 6), -1)
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self.title.set_text(activity.metadata['title'])
self.title.connect('changed', self.__title_changed_cb)
self._add_widget(self.title)
activity.metadata.connect('updated', self.__jobject_updated_cb)
separator = gtk.SeparatorToolItem()
separator.props.draw = False
separator.set_expand(True)
self.insert(separator, -1)
separator.show()
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self.share = ToolComboBox(label_text=_('Share with:'))
self.share.combo.connect('changed', self.__share_changed_cb)
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self.share.combo.append_item(SCOPE_PRIVATE, _('Private'), 'zoom-home')
self.share.combo.append_item(SCOPE_NEIGHBORHOOD, _('My Neighborhood'),
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'zoom-neighborhood')
self.insert(self.share, -1)
self.share.show()
self._update_share()
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self.keep = ToolButton('document-save')
self.keep.set_tooltip(_('Keep'))
self.keep.connect('clicked', self.__keep_clicked_cb)
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self.insert(self.keep, -1)
self.keep.show()
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self.stop = ToolButton('activity-stop')
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self.stop.set_tooltip(_('Stop'))
self.stop.connect('clicked', self.__stop_clicked_cb)
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self.insert(self.stop, -1)
self.stop.show()
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self._update_title_sid = None
def _update_share(self):
self._updating_share = True
if self._activity.props.max_participants == 1:
self.share.hide()
if self._activity.get_shared():
self.share.set_sensitive(False)
self.share.combo.set_active(1)
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else:
self.share.set_sensitive(True)
self.share.combo.set_active(0)
self._updating_share = False
def __share_changed_cb(self, combo):
if self._updating_share:
return
model = self.share.combo.get_model()
it = self.share.combo.get_active_iter()
(scope, ) = model.get(it, 0)
if scope == SCOPE_NEIGHBORHOOD:
self._activity.share()
def __keep_clicked_cb(self, button):
self._activity.copy()
def __stop_clicked_cb(self, button):
self._activity.take_screenshot()
self._activity.close()
def __jobject_updated_cb(self, jobject):
self.title.set_text(jobject['title'])
def __title_changed_cb(self, entry):
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if not self._update_title_sid:
self._update_title_sid = gobject.timeout_add(1000, self.__update_title_cb)
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def __update_title_cb(self):
title = self.title.get_text()
self._activity.metadata['title'] = title
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self._activity.metadata['title_set_by_user'] = '1'
self._activity.save()
shared_activity = self._activity._shared_activity
if shared_activity:
shared_activity.props.name = title
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self._update_title_sid = None
return False
def _add_widget(self, widget, expand=False):
tool_item = gtk.ToolItem()
tool_item.set_expand(expand)
tool_item.add(widget)
widget.show()
self.insert(tool_item, -1)
tool_item.show()
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def __activity_shared_cb(self, activity):
self._update_share()
def __max_participants_changed_cb(self, activity, pspec):
self._update_share()
class EditToolbar(gtk.Toolbar):
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"""Provides the standard edit toolbar for Activities.
Members:
undo -- the undo button
redo -- the redo button
copy -- the copy button
paste -- the paste button
separator -- A separator between undo/redo and copy/paste
This class only provides the 'edit' buttons in a standard layout, your activity
will need to either hide buttons which make no sense for your Activity, or you
need to connect the button events to your own callbacks:
## Example from Read.activity:
# Create the edit toolbar:
self._edit_toolbar = EditToolbar(self._view)
# Hide undo and redo, they're not needed
self._edit_toolbar.undo.props.visible = False
self._edit_toolbar.redo.props.visible = False
# Hide the separator too:
self._edit_toolbar.separator.props.visible = False
# As long as nothing is selected, copy needs to be insensitive:
self._edit_toolbar.copy.set_sensitive(False)
# When the user clicks the button, call _edit_toolbar_copy_cb()
self._edit_toolbar.copy.connect('clicked', self._edit_toolbar_copy_cb)
# Add the edit toolbar:
toolbox.add_toolbar(_('Edit'), self._edit_toolbar)
# And make it visible:
self._edit_toolbar.show()
"""
def __init__(self):
gtk.Toolbar.__init__(self)
self.undo = ToolButton('edit-undo')
self.undo.set_tooltip(_('Undo'))
self.insert(self.undo, -1)
self.undo.show()
self.redo = ToolButton('edit-redo')
self.redo.set_tooltip(_('Redo'))
self.insert(self.redo, -1)
self.redo.show()
self.separator = gtk.SeparatorToolItem()
self.separator.set_draw(True)
self.insert(self.separator, -1)
self.separator.show()
self.copy = ToolButton('edit-copy')
self.copy.set_tooltip(_('Copy'))
self.insert(self.copy, -1)
self.copy.show()
self.paste = ToolButton('edit-paste')
self.paste.set_tooltip(_('Paste'))
self.insert(self.paste, -1)
self.paste.show()
class ActivityToolbox(Toolbox):
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"""Creates the Toolbox for the Activity
By default, the toolbox contains only the ActivityToolbar. After creating the
toolbox, you can add your activity specific toolbars, for example the
EditToolbar.
To add the ActivityToolbox to your Activity in MyActivity.__init__() do:
# Create the Toolbar with the ActivityToolbar:
toolbox = activity.ActivityToolbox(self)
... your code, inserting all other toolbars you need, like EditToolbar ...
# Add the toolbox to the activity frame:
self.set_toolbox(toolbox)
# And make it visible:
toolbox.show()
"""
def __init__(self, activity):
Toolbox.__init__(self)
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self._activity_toolbar = ActivityToolbar(activity)
self.add_toolbar('Activity', self._activity_toolbar)
self._activity_toolbar.show()
def get_activity_toolbar(self):
return self._activity_toolbar
class Activity(Window, gtk.Container):
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"""This is the base Activity class that all other Activities derive from. This is where your activity starts.
To get a working Activity:
0. Derive your Activity from this class:
class MyActivity(activity.Activity):
...
1. implement an __init__() method for your Activity class.
Use your init method to create your own ActivityToolbar which will
contain some standard buttons:
toolbox = activity.ActivityToolbox(self)
Add extra Toolbars to your toolbox.
You should setup Activity sharing here too.
Finaly, your Activity may need some resources which you can claim
here too.
The __init__() method is also used to make the distinction between
being resumed from the Journal, or starting with a blank document.
2. Implement read_file() and write_file()
Most activities revolve around creating and storing Journal entries.
For example, Write: You create a document, it is saved to the Journal
and then later you resume working on the document.
read_file() and write_file() will be called by sugar to tell your
Activity that it should load or save the document the user is working
on.
3. Implement our Activity Toolbars.
The Toolbars are added to your Activity in step 1 (the toolbox), but
you need to implement them somewhere. Now is a good time.
There are a number of standard Toolbars. The most basic one, the one
your almost absolutely MUST have is the ActivityToolbar. Without
this, you're not really making a proper Sugar Activity (which may be
okay, but you should really stop and think about why not!) You do
this with the ActivityToolbox(self) call in step 1.
Usually, you will also need the standard EditToolbar. This is the one
which has the standard copy and paste buttons. You need to derive
your own EditToolbar class from sugar.EditToolbar:
class EditToolbar(activity.EditToolbar):
...
See EditToolbar for the methods you should implement in your class.
Finaly, your Activity will very likely need some activity specific
buttons and options you can create your own toolbars by deriving a
class from gtk.Toolbar:
class MySpecialToolbar(gtk.Toolbar):
...
4. Use your creativity. Make your Activity something special and share
it with your friends!
Read through the methods of the Activity class below, to learn more about
how to make an Activity work.
Hint: A good and simple Activity to learn from is the Read activity. To
create your own activity, you may want to copy it and use it as a template.
"""
__gtype_name__ = 'SugarActivity'
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__gsignals__ = {
'shared': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE, ([])),
'joined': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE, ([]))
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}
__gproperties__ = {
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'active' : (bool, None, None, False,
gobject.PARAM_READWRITE),
'max-participants': (int, None, None, 0, 1000, 0,
gobject.PARAM_READWRITE)
}
def __init__(self, handle, create_jobject=True):
"""Initialise the Activity
handle -- sugar.activity.activityhandle.ActivityHandle
instance providing the activity id and access to the
presence service which *may* provide sharing for this
application
create_jobject -- boolean
define if it should create a journal object if we are
not resuming
Side effects:
Sets the gdk screen DPI setting (resolution) to the
Sugar screen resolution.
Connects our "destroy" message to our _destroy_cb
method.
Creates a base gtk.Window within this window.
Creates an ActivityService (self._bus) servicing
this application.
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Usage:
If your Activity implements __init__(), it should call
the base class __init()__ before doing Activity specific things.
"""
Window.__init__(self)
# process titles will only show 15 characters
# but they get truncated anyway so if more characters
# are supported in the future we will get a better view
# of the processes
proc_title = "%s <%s>" % (get_bundle_name(), handle.activity_id)
util.set_proc_title(proc_title)
self.connect('realize', self.__realize_cb)
self.connect('delete-event', self.__delete_event_cb)
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self.connect("key_press_event", self.__key_press_event_cb)
self._active = False
self._activity_id = handle.activity_id
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self._pservice = presenceservice.get_instance()
self._shared_activity = None
self._share_id = None
self._join_id = None
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self._preview = _sugarext.Preview()
self._updating_jobject = False
self._closing = False
self._deleting = False
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self._max_participants = 0
self._invites_queue = []
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self._bus = ActivityService(self)
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self._owns_file = False
share_scope = SCOPE_PRIVATE
if handle.object_id:
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self._jobject = datastore.get(handle.object_id)
# TODO: Don't create so many objects until we have versioning
# support in the datastore
#self._jobject.object_id = ''
#del self._jobject.metadata['ctime']
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del self._jobject.metadata['mtime']
self.set_title(self._jobject.metadata['title'])
if self._jobject.metadata.has_key('share-scope'):
share_scope = self._jobject.metadata['share-scope']
elif create_jobject:
logging.debug('Creating a jobject.')
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self._jobject = datastore.create()
self._jobject.metadata['title'] = _('%s Activity') % get_bundle_name()
self.set_title(self._jobject.metadata['title'])
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self._jobject.metadata['title_set_by_user'] = '0'
self._jobject.metadata['activity'] = self.get_bundle_id()
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self._jobject.metadata['activity_id'] = self.get_id()
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self._jobject.metadata['keep'] = '0'
self._jobject.metadata['preview'] = ''
self._jobject.metadata['share-scope'] = SCOPE_PRIVATE
if self._shared_activity is not None:
icon_color = self._shared_activity.props.color
else:
icon_color = profile.get_color().to_string()
self._jobject.metadata['icon-color'] = icon_color
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self._jobject.file_path = ''
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# Cannot call datastore.write async for creates: https://dev.laptop.org/ticket/3071
datastore.write(self._jobject)
else:
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self._jobject = None
# handle activity share/join
mesh_instance = self._pservice.get_activity(self._activity_id,
warn_if_none=False)
logging.debug("*** Act %s, mesh instance %r, scope %s",
self._activity_id, mesh_instance, share_scope)
if mesh_instance is not None:
# There's already an instance on the mesh, join it
logging.debug("*** Act %s joining existing mesh instance %r", self._activity_id, mesh_instance)
self._shared_activity = mesh_instance
self._shared_activity.connect('notify::private',
self.__privacy_changed_cb)
self._join_id = self._shared_activity.connect("joined", self.__joined_cb)
if not self._shared_activity.props.joined:
self._shared_activity.join()
else:
self.__joined_cb(self._shared_activity, True, None)
elif share_scope != SCOPE_PRIVATE:
logging.debug("*** Act %s no existing mesh instance, but used to be shared, will share" % self._activity_id)
# no existing mesh instance, but activity used to be shared, so
# restart the share
if share_scope == SCOPE_INVITE_ONLY:
self.share(private=True)
elif share_scope == SCOPE_NEIGHBORHOOD:
self.share(private=False)
else:
logging.debug("Unknown share scope %r" % share_scope)
def do_set_property(self, pspec, value):
if pspec.name == 'active':
if self._active != value:
self._active = value
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if not self._active and self._jobject:
self.save()
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elif pspec.name == 'max-participants':
self._max_participants = value
else:
Window.do_set_property(self, pspec, value)
def do_get_property(self, pspec):
if pspec.name == 'active':
return self._active
elif pspec.name == 'max-participants':
return self._max_participants
else:
return Window.do_get_property(self, pspec)
def get_id(self):
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"""Returns the activity id of the current instance of your activity.
The activity id is sort-of-like the unix process id (PID). However,
unlike PIDs it is only different for each new instance (with
create_jobject = True set) and stays the same everytime a user
resumes an activity. This is also the identity of your Activity to other
XOs for use when sharing.
"""
return self._activity_id
def get_bundle_id(self):
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"""Returns the bundle_id from the activity.info file"""
return os.environ['SUGAR_BUNDLE_ID']
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def set_canvas(self, canvas):
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"""Sets the 'work area' of your activity with the canvas of your choice.
One commonly used canvas is gtk.ScrolledWindow
"""
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Window.set_canvas(self, canvas)
canvas.connect('map', self.__canvas_map_cb)
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def __canvas_map_cb(self, canvas):
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if self._jobject and self._jobject.file_path:
self.read_file(self._jobject.file_path)
def __jobject_create_cb(self):
pass
def __jobject_error_cb(self, err):
logging.debug("Error creating activity datastore object: %s" % err)
def get_activity_root(self):
""" FIXME: Deprecated. This part of the API has been moved
out of this class to the module itself
Returns a path for saving Activity specific preferences, etc.
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Returns a path to the location in the filesystem where the activity can
store activity related data that doesn't pertain to the current
execution of the activity and thus cannot go into the DataStore.
Currently, this will return something like ~/.sugar/default/MyActivityName/
Activities should ONLY save settings, user preferences and other data
which isn't specific to a journal item here. If (meta-)data is in anyway
specific to a journal entry, it MUST be stored in the DataStore.
"""
if os.environ.has_key('SUGAR_ACTIVITY_ROOT') and \
os.environ['SUGAR_ACTIVITY_ROOT']:
return os.environ['SUGAR_ACTIVITY_ROOT']
else:
return '/'
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def read_file(self, file_path):
"""
Subclasses implement this method if they support resuming objects from
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the journal. 'file_path' is the file to read from.
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You should immediately open the file from the file_path, because the
file_name will be deleted immediately after returning from read_file().
Once the file has been opened, you do not have to read it immediately:
After you have opened it, the file will only be really gone when you
close it.
Although not required, this is also a good time to read all meta-data:
the file itself cannot be changed externally, but the title, description
and other metadata['tags'] may change. So if it is important for you to
notice changes, this is the time to record the originals.
"""
raise NotImplementedError
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def write_file(self, file_path):
"""
Subclasses implement this method if they support saving data to objects
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in the journal. 'file_path' is the file to write to.
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If the user did make changes, you should create the file_path and save
all document data to it.
Additionally, you should also write any metadata needed to resume your
activity. For example, the Read activity saves the current page and zoom
level, so it can display the page.
Note: Currently, the file_path *WILL* be different from the one you
received in file_read(). Even if you kept the file_path from file_read()
open until now, you must still write the entire file to this file_path.
"""
raise NotImplementedError
def __save_cb(self):
logging.debug('Activity.__save_cb')
self._updating_jobject = False
if self._closing:
self._cleanup_jobject()
self.destroy()
def __save_error_cb(self, err):
logging.debug('Activity.__save_error_cb')
self._updating_jobject = False
if self._closing:
self._cleanup_jobject()
self.destroy()
logging.debug("Error saving activity object to datastore: %s" % err)
def _cleanup_jobject(self):
if self._jobject:
if self._owns_file and os.path.isfile(self._jobject.file_path):
logging.debug('_cleanup_jobject: removing %r' % self._jobject.file_path)
os.remove(self._jobject.file_path)
self._owns_file = False
self._jobject.destroy()
self._jobject = None
def _get_preview(self):
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pixbuf = self._preview.get_pixbuf()
if pixbuf is None:
return None
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pixbuf = pixbuf.scale_simple(style.zoom(300), style.zoom(225),
gtk.gdk.INTERP_BILINEAR)
# TODO: Find a way of taking a png out of the pixbuf without saving
# to a temp file. Impementing gtk.gdk.Pixbuf.save_to_buffer in pygtk
# would solve this.
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fd, file_path = tempfile.mkstemp('.png')
del fd
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pixbuf.save(file_path, 'png')
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f = open(file_path)
try:
preview_data = f.read()
finally:
f.close()
os.remove(file_path)
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self._preview.clear()
return preview_data
def _get_buddies(self):
if self._shared_activity is not None:
buddies = {}
for buddy in self._shared_activity.get_joined_buddies():
if not buddy.props.owner:
buddy_id = sha1(buddy.props.key).hexdigest()
buddies[buddy_id] = [buddy.props.nick, buddy.props.color]
return buddies
else:
return {}
def take_screenshot(self):
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if self.canvas and self.canvas.window:
self._preview.take_screenshot(self.canvas.window)
def save(self):
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"""Request that the activity is saved to the Journal.
This method is called by the close() method below. In general,
activities should not override this method. This method is part of the
public API of an Acivity, and should behave in standard ways. Use your
own implementation of write_file() to save your Activity specific data.
"""
logging.debug('Activity.save: %r' % self._jobject.object_id)
if self._updating_jobject:
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logging.info('Activity.save: still processing a previous request.')
return
buddies_dict = self._get_buddies()
if buddies_dict:
self.metadata['buddies_id'] = json.write(buddies_dict.keys())
self.metadata['buddies'] = json.write(self._get_buddies())
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preview = self._get_preview()
if self._preview:
self.metadata['preview'] = dbus.ByteArray(preview)
try:
file_path = os.path.join(self.get_activity_root(), 'instance',
'%i' % time.time())
self.write_file(file_path)
self._owns_file = True
self._jobject.file_path = file_path
except NotImplementedError:
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pass
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# Cannot call datastore.write async for creates: https://dev.laptop.org/ticket/3071
if self._jobject.object_id is None:
datastore.write(self._jobject, transfer_ownership=True)
else:
self._updating_jobject = True
datastore.write(self._jobject,
transfer_ownership=True,
reply_handler=self.__save_cb,
error_handler=self.__save_error_cb)
def copy(self):
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"""Request that the activity 'Keep in Journal' the current state of the activity.
Activities should not override this method. Instead, like save() do any
copy work that needs to be done in write_file()
"""
logging.debug('Activity.copy: %r' % self._jobject.object_id)
self.save()
self._jobject.object_id = None
def __privacy_changed_cb(self, shared_activity, param_spec):
if shared_activity.props.private:
self._jobject.metadata['share-scope'] = SCOPE_INVITE_ONLY
else:
self._jobject.metadata['share-scope'] = SCOPE_NEIGHBORHOOD
def __joined_cb(self, activity, success, err):
"""Callback when join has finished"""
self._shared_activity.disconnect(self._join_id)
self._join_id = None
if not success:
logging.debug("Failed to join activity: %s" % err)
return
self.present()
self.emit('joined')
self.__privacy_changed_cb(self._shared_activity, None)
def get_shared(self):
"""Returns TRUE if the activity is shared on the mesh."""
if not self._shared_activity:
return False
return self._shared_activity.props.joined
def __share_cb(self, ps, success, activity, err):
self._pservice.disconnect(self._share_id)
self._share_id = None
if not success:
logging.debug('Share of activity %s failed: %s.' % (self._activity_id, err))
return
logging.debug('Share of activity %s successful, PS activity is %r.',
self._activity_id, activity)
activity.props.name = self._jobject.metadata['title']
self._shared_activity = activity
self._shared_activity.connect('notify::private',
self.__privacy_changed_cb)
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self.emit('shared')
self.__privacy_changed_cb(self._shared_activity, None)
self._send_invites()
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def _invite_response_cb(self, error):
if error:
logging.error('Invite failed: %s' % error)
def _send_invites(self):
while self._invites_queue:
buddy_key = self._invites_queue.pop()
buddy = self._pservice.get_buddy(buddy_key)
if buddy:
self._shared_activity.invite(buddy, '', self._invite_response_cb)
else:
logging.error('Cannot invite %s, no such buddy.' % buddy_key)
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def invite(self, buddy_key):
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"""Invite a buddy to join this Activity.
Side Effects:
Calls self.share(True) to privately share the activity if it wasn't
shared before.
"""
self._invites_queue.append(buddy_key)
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if (self._shared_activity is None
or not self._shared_activity.props.joined):
self.share(True)
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else:
self._send_invites()
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def share(self, private=False):
"""Request that the activity be shared on the network.
private -- bool: True to share by invitation only,
False to advertise as shared to everyone.
Once the activity is shared, its privacy can be changed by setting
its 'private' property.
"""
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if self._shared_activity and self._shared_activity.props.joined:
raise RuntimeError("Activity %s already shared." %
self._activity_id)
verb = private and 'private' or 'public'
logging.debug('Requesting %s share of activity %s.' %
(verb, self._activity_id))
self._share_id = self._pservice.connect("activity-shared",
self.__share_cb)
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self._pservice.share_activity(self, private=private)
def _display_keep_failed_dialog(self):
alert = Alert()
alert.props.title = _('Keep error')
alert.props.msg = _('Keep error: all changes will be lost')
cancel_icon = Icon(icon_name='dialog-cancel')
alert.add_button(gtk.RESPONSE_CANCEL, _('Don\'t stop'), cancel_icon)
stop_icon = Icon(icon_name='dialog-ok')
alert.add_button(gtk.RESPONSE_OK, _('Stop anyway'), stop_icon)
self.add_alert(alert)
alert.connect('response', self._keep_failed_dialog_response_cb)
def _keep_failed_dialog_response_cb(self, alert, response_id):
self.remove_alert(alert)
if response_id == gtk.RESPONSE_OK:
self.close(skip_save=True)
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def can_close(self):
"""Activities should override this function if they want to perform
extra checks before actually closing."""
return True
def close(self, force=False, skip_save=False):
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"""Request that the activity be stopped and saved to the Journal
Activities should not override this method, but should implement write_file() to
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do any state saving instead. If the application wants to control wether it can
close, it should override can_close().
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"""
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if not force:
if not self.can_close():
return
try:
if not skip_save:
self.save()
except:
logging.info(traceback.format_exc())
self._display_keep_failed_dialog()
return
if self._shared_activity:
self._shared_activity.leave()
if self._updating_jobject:
self._closing = True
else:
self.destroy()
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# Make the exported object inaccessible
dbus.service.Object.remove_from_connection(self._bus)
def __realize_cb(self, window):
wm.set_bundle_id(window.window, self.get_bundle_id())
wm.set_activity_id(window.window, str(self._activity_id))
def __delete_event_cb(self, widget, event):
self.close()
return True
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def get_metadata(self):
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"""Returns the jobject metadata or None if there is no jobject.
Activities can set metadata in write_file() using:
self.metadata['MyKey'] = "Something"
and retrieve metadata in read_file() using:
self.metadata.get('MyKey', 'aDefaultValue')
Note: Make sure your activity works properly if one or more of the
metadata items is missing. Never assume they will all be present.
"""
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if self._jobject:
return self._jobject.metadata
else:
return None
metadata = property(get_metadata, None)
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def __key_press_event_cb(self, widget, event):
key = gtk.gdk.keyval_name(event.keyval)
if key == 's' and (event.state & gtk.gdk.CONTROL_MASK):
logging.debug('Keep requested')
self.copy()
return True
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def get_bundle_name():
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"""Return the bundle name for the current process' bundle"""
return os.environ['SUGAR_BUNDLE_NAME']
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def get_bundle_path():
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"""Return the bundle path for the current process' bundle"""
return os.environ['SUGAR_BUNDLE_PATH']
def get_activity_root():
"""Returns a path for saving Activity specific preferences, etc."""
if os.environ.has_key('SUGAR_ACTIVITY_ROOT') and \
os.environ['SUGAR_ACTIVITY_ROOT']:
return os.environ['SUGAR_ACTIVITY_ROOT']
else:
raise RuntimeError("No SUGAR_ACTIVITY_ROOT set.")
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def show_object_in_journal(object_id):
bus = dbus.SessionBus()
obj = bus.get_object(J_DBUS_SERVICE, J_DBUS_PATH)
journal = dbus.Interface(obj, J_DBUS_INTERFACE)
journal.ShowObject(object_id)