sugar-toolkit-gtk3/shell/view/frame/frame.py

# 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 logging

import gtk
import gobject
import hippo

from sugar.graphics import animator
from sugar.graphics import style
from sugar.graphics import palettegroup
from sugar.clipboard import clipboardservice

from view.frame.eventarea import EventArea
from view.frame.ActivitiesBox import ActivitiesBox
from view.frame.zoomtoolbar import ZoomToolbar
from view.frame.friendstray import FriendsTray
from view.frame.framewindow import FrameWindow
from view.frame.clipboardpanelwindow import ClipboardPanelWindow
from model.shellmodel import ShellModel

MODE_NONE     = 0
MODE_MOUSE    = 1
MODE_KEYBOARD = 2
MODE_FORCE    = 3

_FRAME_HIDING_DELAY = 500

class _Animation(animator.Animation):
    def __init__(self, frame, end):
        start = frame.get_current_position()
        animator.Animation.__init__(self, start, end)
        self._frame = frame

    def next_frame(self, current):
        self._frame.move(current)

class _MouseListener(object):
    def __init__(self, frame):
        self._frame = frame
        self._hide_sid = 0

    def mouse_enter(self):
        if self._frame.mode == MODE_NONE or \
           self._frame.mode == MODE_MOUSE:
            self._show_frame()

    def mouse_leave(self):
        if self._frame.mode == MODE_MOUSE:
            self._hide_frame()

    def _show_frame(self):
        if self._hide_sid != 0:
            gobject.source_remove(self._hide_sid)
        self._frame.show()
        self._frame.mode = MODE_MOUSE

    def _hide_frame_timeout_cb(self):
        self._frame.hide()
        return False

    def _hide_frame(self):
        if self._hide_sid != 0:
            gobject.source_remove(self._hide_sid)
        self._hide_sid = gobject.timeout_add(
                  _FRAME_HIDING_DELAY, self._hide_frame_timeout_cb)

class _KeyListener(object):
    _HIDDEN = 1
    _SHOWN_PRESSED = 2
    _SHOWN_REPEAT = 3
    _SHOWN_RELEASED = 4

    def __init__(self, frame):
        self._frame = frame
        self._state = _KeyListener._HIDDEN

    def key_press(self):
        if self._frame.mode != MODE_NONE and \
           self._frame.mode != MODE_KEYBOARD:
            return

        if self._frame.visible:
            self._frame.hide()
        else:
            self._frame.show()
            self._frame.mode = MODE_KEYBOARD

        """
        if self._state == _KeyListener._HIDDEN:
            self._frame.show()
            self._frame.mode = MODE_KEYBOARD
            self._state = _KeyListener._SHOWN_PRESSED
        elif self._state == _KeyListener._SHOWN_PRESSED:
            self._state = _KeyListener._SHOWN_REPEAT
        elif self._state == _KeyListener._SHOWN_RELEASED:
            self._frame.hide()
            self._state = _KeyListener._HIDDEN
        """

    def key_release(self):
        pass
        """
        if self._state == _KeyListener._SHOWN_PRESSED:
            self._state = _KeyListener._SHOWN_RELEASED
        elif self._state == _KeyListener._SHOWN_REPEAT:
            self._frame.hide()
            self._state = _KeyListener._HIDDEN
        """

class Frame(object):
    def __init__(self, shell):
        self.mode = MODE_NONE
        self.visible = False

        self._palette_group = palettegroup.get_group('frame')
        self._palette_group.connect('popdown', self._palette_group_popdown_cb)

        self._left_panel = None
        self._right_panel = None
        self._top_panel = None
        self._bottom_panel = None

        self._shell = shell
        self._current_position = 0.0
        self._animator = None
        self._hover = False

        self._event_area = EventArea()
        self._event_area.connect('enter', self._enter_corner_cb)
        self._event_area.show()

        self._top_panel = self._create_top_panel()
        self._bottom_panel = self._create_bottom_panel()
        self._left_panel = self._create_left_panel()
        self._right_panel = self._create_right_panel()

        screen = gtk.gdk.screen_get_default()
        screen.connect('size-changed', self._size_changed_cb)

        cb_service = clipboardservice.get_instance()
        cb_service.connect_after('object-added', self._clipboard_object_added_cb)

        self._key_listener = _KeyListener(self)
        self._mouse_listener = _MouseListener(self)

    def hide(self, force=False):
        if not self.visible:
            return
        if self._animator:
            self._animator.stop()

        self._animator = animator.Animator(0.5)
        self._animator.add(_Animation(self, 0.0))
        self._animator.start()

        self._event_area.show()

        self.visible = False
        if force:
            self.mode = MODE_NONE
        else:
            self.mode = MODE_FORCE
            self._animator.connect('completed', self._hide_completed_cb)

    def show(self):
        self.mode = MODE_FORCE

        if self.visible:
            return
        if self._animator:
            self._animator.stop()

        self._animator = animator.Animator(0.5)
        self._animator.add(_Animation(self, 1.0))
        self._animator.start()

        self._event_area.hide()

        self.visible = True

    def get_current_position(self):
        return self._current_position

    def move(self, pos):
        self._current_position = pos
        self._update_position()

    def _is_hover(self):
        return (self._top_panel.hover or \
                self._bottom_panel.hover or \
                self._left_panel.hover or \
                self._right_panel.hover)

    def _create_top_panel(self):
        panel = self._create_panel(gtk.POS_TOP)

        toolbar = ZoomToolbar(self._shell)
        panel.append(hippo.CanvasWidget(widget=toolbar))
        toolbar.show()

        return panel

    def _create_bottom_panel(self):
        panel = self._create_panel(gtk.POS_BOTTOM)

        box = ActivitiesBox(self._shell)
        panel.append(box, hippo.PACK_EXPAND)

        return panel

    def _create_right_panel(self):
        panel = self._create_panel(gtk.POS_RIGHT)

        tray = FriendsTray(self._shell)
        panel.append(hippo.CanvasWidget(widget=tray), hippo.PACK_EXPAND)
        tray.show()

        return panel

    def _create_left_panel(self):
        panel = ClipboardPanelWindow(self, gtk.POS_LEFT)

        self._connect_to_panel(panel)
        panel.connect('drag-motion', self._drag_motion_cb)
        panel.connect('drag-leave', self._drag_leave_cb)

        return panel

    def _create_panel(self, orientation):
        panel = FrameWindow(orientation)
        self._connect_to_panel(panel)

        return panel

    def _move_panel(self, panel, pos, x1, y1, x2, y2):
        x = (x2 - x1) * pos + x1
        y = (y2 - y1) * pos + y1

        panel.move(int(x), int(y))

        # FIXME we should hide and show as necessary to free memory
        if not panel.props.visible:
            panel.show()

    def _connect_to_panel(self, panel):
        panel.connect('enter-notify-event', self._enter_notify_cb)
        panel.connect('leave-notify-event', self._leave_notify_cb)

    def _update_position(self):
        screen_h = gtk.gdk.screen_height()
        screen_w = gtk.gdk.screen_width()

        self._move_panel(self._top_panel, self._current_position,
                         0, - self._top_panel.size, 0, 0)

        self._move_panel(self._bottom_panel, self._current_position,
                         0, screen_h, 0, screen_h - self._bottom_panel.size)

        self._move_panel(self._left_panel, self._current_position,
                         - self._left_panel.size, 0, 0, 0)

        self._move_panel(self._right_panel, self._current_position,
                         screen_w, 0, screen_w - self._right_panel.size, 0)

    def _hide_completed_cb(self, animator):
        self.mode = MODE_NONE

    def _size_changed_cb(self, screen):
       self._update_position()

    def _clipboard_object_added_cb(self, cb_service, object_id, name):
        if not self.visible:
            self.show()
            gobject.timeout_add(2000, lambda: self.hide())

    def _enter_notify_cb(self, window, event):
        # FIXME clicks cause leave/notify, ignore
        if event.state == gtk.gdk.BUTTON1_MASK:
            return
        if self._hover:
            return

        self._hover = True
        self._mouse_listener.mouse_enter()

    def _leave_notify_cb(self, window, event):
        # FIXME clicks cause leave/notify, ignore
        if event.state == gtk.gdk.BUTTON1_MASK:
            return
        if not self._hover:
            return

        if not self._is_hover() and not self._palette_group.is_up():
            self._hover = False
            self._mouse_listener.mouse_leave()

    def _palette_group_popdown_cb(self, group):
        if not self._is_hover():
            self._mouse_listener.mouse_leave()

    def _drag_motion_cb(self, window, context, x, y, time):
        self._mouse_listener.mouse_enter()
        
    def _drag_leave_cb(self, window, drag_context, timestamp):
        self._mouse_listener.mouse_leave()
            
    def _enter_corner_cb(self, event_area):
        self._mouse_listener.mouse_enter()
        
    def notify_key_press(self):
        self._key_listener.key_press()

    def notify_key_release(self):
        self._key_listener.key_release()