# Copyright (C) 2006-2007 Red Hat, Inc.
#
# 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 gtk
import hippo
import cairo

from sugar.graphics import units
import sugar

from view.home.MeshBox import MeshBox
from view.home.HomeBox import HomeBox
from view.home.FriendsBox import FriendsBox
from view.home.transitionbox import TransitionBox

_HOME_PAGE       = 0
_FRIENDS_PAGE    = 1
_MESH_PAGE       = 2
_TRANSITION_PAGE = 3

class HomeWindow(gtk.Window):
    def __init__(self, shell):
        gtk.Window.__init__(self)

        self._shell = shell
        self._active = False
        self._level = sugar.ZOOM_HOME

        self._canvas = hippo.Canvas()
        self.add(self._canvas)
        self._canvas.show()

        self.set_default_size(gtk.gdk.screen_width(),
                              gtk.gdk.screen_height())

        self.realize()
        self.window.set_type_hint(gtk.gdk.WINDOW_TYPE_HINT_DESKTOP)
        self.connect("key-release-event", self._key_release_cb)
        self.connect('focus-in-event', self._focus_in_cb)
        self.connect('focus-out-event', self._focus_out_cb)

        self._enter_sid = self.connect('enter-notify-event',
                                       self._enter_notify_event_cb)
        self._leave_sid = self.connect('leave-notify-event',
                                       self._leave_notify_event_cb)
        self._motion_sid = self.connect('motion-notify-event',
                                        self._motion_notify_event_cb)

        self._home_box = HomeBox(shell)
        self._friends_box = FriendsBox(shell)
        self._mesh_box = MeshBox(shell)
        self._transition_box = TransitionBox()

        self._canvas.set_root(self._home_box)
        
        self._transition_box.connect('completed',
                                     self._transition_completed_cb)

    def _enter_notify_event_cb(self, window, event):
        if event.x != gtk.gdk.screen_width() / 2 or \
           event.y != gtk.gdk.screen_height() / 2:
            self._mouse_moved()

    def _leave_notify_event_cb(self, window, event):
        self._mouse_moved()

    def _motion_notify_event_cb(self, window, event):
        self._mouse_moved()

    # We want to enable the XO palette only when the user
    # moved away from the default mouse position (screen center).
    def _mouse_moved(self):
        self._home_box.enable_xo_palette()
        self.disconnect(self._leave_sid)
        self.disconnect(self._motion_sid)
        self.disconnect(self._enter_sid)

    def _key_release_cb(self, widget, event):
        keyname = gtk.gdk.keyval_name(event.keyval)
        if keyname == "Alt_L":
            self._home_box.release()

    def _update_mesh_state(self):
        if self._active and self._level == sugar.ZOOM_MESH:
            self._mesh_box.resume()
        else:
            self._mesh_box.suspend()

    def _focus_in_cb(self, widget, event):
        self._active = True
        self._update_mesh_state()

    def _focus_out_cb(self, widget, event):
        self._active = False
        self._update_mesh_state()
            
    def set_zoom_level(self, level):
        self._level = level
    
        self._canvas.set_root(self._transition_box)

        if level == sugar.ZOOM_HOME:
            scale = units.XLARGE_ICON_SCALE
        elif level == sugar.ZOOM_FRIENDS:
            scale = units.LARGE_ICON_SCALE
        elif level == sugar.ZOOM_MESH:
            scale = units.STANDARD_ICON_SCALE
            
        self._transition_box.set_scale(scale)
    
    def _transition_completed_cb(self, transition_box):
        if self._level == sugar.ZOOM_HOME:
            self._canvas.set_root(self._home_box)
        elif self._level == sugar.ZOOM_FRIENDS:
            self._canvas.set_root(self._friends_box)
        elif self._level == sugar.ZOOM_MESH:
            self._canvas.set_root(self._mesh_box)

        self._update_mesh_state()
        
    def get_home_box(self):
        return self._home_box