diff options
Diffstat (limited to 'src/jarabe/view/tabbinghandler.py')
| -rw-r--r-- | src/jarabe/view/tabbinghandler.py | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/src/jarabe/view/tabbinghandler.py b/src/jarabe/view/tabbinghandler.py new file mode 100644 index 0000000..0889792 --- /dev/null +++ b/src/jarabe/view/tabbinghandler.py @@ -0,0 +1,149 @@ +# Copyright (C) 2008, Benjamin Berg <benjamin@sipsolutions.net> +# +# 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 logging + +import gobject +import gtk + +from jarabe.model import shell + + +_RAISE_DELAY = 250 + + +class TabbingHandler(object): + def __init__(self, frame, modifier): + self._frame = frame + self._tabbing = False + self._modifier = modifier + self._timeout = None + + def _start_tabbing(self): + if not self._tabbing: + logging.debug('Grabing the input.') + + screen = gtk.gdk.screen_get_default() + window = screen.get_root_window() + keyboard_grab_result = gtk.gdk.keyboard_grab(window) + pointer_grab_result = gtk.gdk.pointer_grab(window) + + self._tabbing = (keyboard_grab_result == gtk.gdk.GRAB_SUCCESS and + pointer_grab_result == gtk.gdk.GRAB_SUCCESS) + + # Now test that the modifier is still active to prevent race + # conditions. We also test if one of the grabs failed. + mask = window.get_pointer()[2] + if not self._tabbing or not (mask & self._modifier): + logging.debug('Releasing grabs again.') + + # ungrab keyboard/pointer if the grab was successfull. + if keyboard_grab_result == gtk.gdk.GRAB_SUCCESS: + gtk.gdk.keyboard_ungrab() + if pointer_grab_result == gtk.gdk.GRAB_SUCCESS: + gtk.gdk.pointer_ungrab() + + self._tabbing = False + else: + self._frame.show(self._frame.MODE_NON_INTERACTIVE) + + def __timeout_cb(self, event_time): + self._activate_current(event_time) + self._timeout = None + return False + + def _start_timeout(self, event_time): + self._cancel_timeout() + self._timeout = gobject.timeout_add(_RAISE_DELAY, + lambda: self.__timeout_cb(event_time)) + + def _cancel_timeout(self): + if self._timeout: + gobject.source_remove(self._timeout) + self._timeout = None + + def _activate_current(self, event_time): + home_model = shell.get_model() + activity = home_model.get_tabbing_activity() + if activity and activity.get_window(): + activity.get_window().activate(event_time) + + def next_activity(self, event_time): + if not self._tabbing: + first_switch = True + self._start_tabbing() + else: + first_switch = False + + if self._tabbing: + shell_model = shell.get_model() + zoom_level = shell_model.zoom_level + zoom_activity = (zoom_level == shell.ShellModel.ZOOM_ACTIVITY) + + if not zoom_activity and first_switch: + activity = shell_model.get_active_activity() + else: + activity = shell_model.get_tabbing_activity() + activity = shell_model.get_next_activity(current=activity) + + shell_model.set_tabbing_activity(activity) + self._start_timeout(event_time) + else: + self._activate_next_activity(event_time) + + def previous_activity(self, event_time): + if not self._tabbing: + first_switch = True + self._start_tabbing() + else: + first_switch = False + + if self._tabbing: + shell_model = shell.get_model() + zoom_level = shell_model.zoom_level + zoom_activity = (zoom_level == shell.ShellModel.ZOOM_ACTIVITY) + + if not zoom_activity and first_switch: + activity = shell_model.get_active_activity() + else: + activity = shell_model.get_tabbing_activity() + activity = shell_model.get_previous_activity(current=activity) + + shell_model.set_tabbing_activity(activity) + self._start_timeout(event_time) + else: + self._activate_next_activity(event_time) + + def _activate_next_activity(self, event_time): + next_activity = shell.get_model().get_next_activity() + if next_activity: + next_activity.get_window().activate(event_time) + + def stop(self, event_time): + gtk.gdk.keyboard_ungrab() + gtk.gdk.pointer_ungrab() + self._tabbing = False + + self._frame.hide() + + self._cancel_timeout() + self._activate_current(event_time) + + home_model = shell.get_model() + home_model.set_tabbing_activity(None) + + def is_tabbing(self): + return self._tabbing |