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# Copyright (C) 2008, One Laptop Per Child
# Author: Sayamindu Dasgupta <sayamindu@laptop.org>
#
# 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
from sugar.activity import activity
import logging
from gettext import gettext as _
import time
import sys, os
import gtk, gobject
from sugar.graphics.objectchooser import ObjectChooser
import ImageView
import ImageViewerToolbar
class ImageViewerActivity(activity.Activity):
def __init__(self, handle):
activity.Activity.__init__(self, handle)
self.zoom = None
self._tempfile = None
self._close_requested = False
self._want_document = True
self.view = ImageView.ImageViewer()
toolbox = activity.ActivityToolbox(self)
self._view_toolbar = ImageViewerToolbar.ViewToolbar(self.view)
toolbox.add_toolbar(_('View'), self._view_toolbar)
self._view_toolbar.show()
self.set_toolbox(toolbox)
toolbox.show()
self._view_toolbar.connect('go-fullscreen',
self.__view_toolbar_go_fullscreen_cb)
self.connect('window-state-event',
self.__window_state_event_cb)
vadj = gtk.Adjustment()
hadj = gtk.Adjustment()
self.sw = gtk.ScrolledWindow(hadj, vadj)
self.sw.set_policy(gtk.POLICY_AUTOMATIC, gtk.POLICY_AUTOMATIC)
self.sw.add_with_viewport(self.view)
self.set_canvas(self.sw)
self.sw.show_all()
self._show_object_picker = gobject.timeout_add(1000, \
self._show_picker_cb)
def _show_picker_cb(self):
if not self._want_document:
return
chooser = ObjectChooser(_('Choose document'), self,
gtk.DIALOG_MODAL |
gtk.DIALOG_DESTROY_WITH_PARENT)
try:
result = chooser.run()
if result == gtk.RESPONSE_ACCEPT:
jobject = chooser.get_selected_object()
if jobject and jobject.file_path:
self.read_file(jobject.file_path)
finally:
chooser.destroy()
del chooser
def read_file(self, file_path):
self._want_document = False
tempfile = os.path.join(self.get_activity_root(), 'instance', \
'tmp%i' % time.time())
os.link(file_path, tempfile)
self._tempfile = tempfile
self.view.set_file_location(self._tempfile)
self.zoom = int(self.metadata.get('zoom', '0'))
if self.zoom > 0:
self.view.set_zoom(self.zoom)
def write_file(self, file_path):
if self._tempfile is None:
# Stolen from Read to avoid Keep error
raise NotImplementedError
try:
self.metadata['zoom'] = str(self.zoom)
except Exception, e:
logging.error('write_file(): %s', e)
os.link(self._tempfile, file_path)
if self._close_requested:
os.unlink(self._tempfile)
self._tempfile = None
def can_close(self):
"""
Prepare to cleanup on closing.
Called from self.close()
"""
self._close_requested = True
return True
def __view_toolbar_go_fullscreen_cb(self, view_toolbar):
self._old_zoom = self.view.get_property('zoom') #XXX: Hack
# Zoom to fit screen if possible
screen = self.get_screen()
zoom = self.view.calculate_optimal_zoom(screen.get_width(), screen.get_height())
self.view.set_zoom(zoom)
self.fullscreen()
def __window_state_event_cb(self, window, event):
if event.changed_mask & gtk.gdk.WINDOW_STATE_FULLSCREEN:
if not self.window.get_state() & gtk.gdk.WINDOW_STATE_FULLSCREEN:
self.view.set_zoom(self._old_zoom)
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