# Copyright (C) 2007, One Laptop Per Child # Copyright (c) 2008, Media Modifications Ltd. # # 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. import gobject import gtk import hippo import sugar from sugar.graphics import style from sugar.graphics.palette import Palette, ToolInvoker from sugar.graphics.toolbutton import ToolButton from sugar.graphics.icon import Icon from constants import Constants _PREVIOUS_PAGE = 0 _NEXT_PAGE = 1 class _TrayViewport(gtk.Viewport): __gproperties__ = { 'can-scroll' : (bool, None, None, False, gobject.PARAM_READABLE), } def __init__(self, orientation): self.orientation = orientation self._can_scroll = False gobject.GObject.__init__(self) self.set_shadow_type(gtk.SHADOW_NONE) self.traybar = gtk.Toolbar() self.traybar.set_orientation(orientation) self.traybar.set_show_arrow(False) self.add(self.traybar) self.traybar.show() self.connect('size_allocate', self._size_allocate_cb) def scroll(self, direction): if direction == _PREVIOUS_PAGE: self._scroll_previous() elif direction == _NEXT_PAGE: self._scroll_next() def _scroll_next(self): if self.orientation == gtk.ORIENTATION_HORIZONTAL: adj = self.get_hadjustment() new_value = adj.value + self.allocation.width adj.value = min(new_value, adj.upper - self.allocation.width) else: adj = self.get_vadjustment() new_value = adj.value + self.allocation.height adj.value = min(new_value, adj.upper - self.allocation.height) def _scroll_to_end(self): if self.orientation == gtk.ORIENTATION_HORIZONTAL: adj = self.get_hadjustment() adj.value = adj.upper# - self.allocation.width else: adj = self.get_vadjustment() adj.value = adj.upper - self.allocation.height def _scroll_previous(self): if self.orientation == gtk.ORIENTATION_HORIZONTAL: adj = self.get_hadjustment() new_value = adj.value - self.allocation.width adj.value = max(adj.lower, new_value) else: adj = self.get_vadjustment() new_value = adj.value - self.allocation.height adj.value = max(adj.lower, new_value) def do_size_request(self, requisition): child_requisition = self.child.size_request() if self.orientation == gtk.ORIENTATION_HORIZONTAL: requisition[0] = 0 requisition[1] = child_requisition[1] else: requisition[0] = child_requisition[0] requisition[1] = 0 def do_get_property(self, pspec): if pspec.name == 'can-scroll': return self._can_scroll def _size_allocate_cb(self, viewport, allocation): bar_requisition = self.traybar.get_child_requisition() if self.orientation == gtk.ORIENTATION_HORIZONTAL: can_scroll = bar_requisition[0] > allocation.width else: can_scroll = bar_requisition[1] > allocation.height if can_scroll != self._can_scroll: self._can_scroll = can_scroll self.notify('can-scroll') class _TrayScrollButton(gtk.Button): def __init__(self, icon_name, scroll_direction): gobject.GObject.__init__(self) self._viewport = None self._scroll_direction = scroll_direction self.set_relief(gtk.RELIEF_NONE) self.set_size_request(style.GRID_CELL_SIZE, style.GRID_CELL_SIZE) icon = Icon(icon_name = icon_name, icon_size=gtk.ICON_SIZE_SMALL_TOOLBAR) self.set_image(icon) icon.show() self.connect('clicked', self._clicked_cb) def set_viewport(self, viewport): self._viewport = viewport self._viewport.connect('notify::can-scroll', self._viewport_can_scroll_changed_cb) def _viewport_can_scroll_changed_cb(self, viewport, pspec): #self.props.visible = self._viewport.props.can_scroll self.set_sensitive(self._viewport.props.can_scroll) def _clicked_cb(self, button): self._viewport.scroll(self._scroll_direction) viewport = property(fset=set_viewport) class HTray(gtk.VBox): def __init__(self, **kwargs): gobject.GObject.__init__(self, **kwargs) separator = hippo.Canvas() box = hippo.CanvasBox( border_color=Constants.colorWhite.get_int(), background_color=Constants.colorWhite.get_int(), box_height=1, border_bottom=1) separator.set_root(box) self.pack_start(separator, False) hbox = gtk.HBox() self.pack_start(hbox) self.scroll_left = _TrayScrollButton('go-left', _PREVIOUS_PAGE) self.scroll_left_event = gtk.EventBox() self.scroll_left_event.add(self.scroll_left) self.scroll_left_event.set_size_request(55, -1) hbox.pack_start(self.scroll_left_event, False) self.viewport = _TrayViewport(gtk.ORIENTATION_HORIZONTAL) hbox.pack_start(self.viewport) self.viewport.show() self.scroll_right = _TrayScrollButton('go-right', _NEXT_PAGE) self.scroll_right_event = gtk.EventBox() self.scroll_right_event.add(self.scroll_right) self.scroll_right_event.set_size_request(55, -1) hbox.pack_start(self.scroll_right_event, False) self.scroll_left.set_focus_on_click(False) self.scroll_left_event.modify_bg(gtk.STATE_NORMAL, sugar.graphics.style.COLOR_TOOLBAR_GREY.get_gdk_color()) self.scroll_left.modify_bg(gtk.STATE_ACTIVE, sugar.graphics.style.COLOR_BUTTON_GREY.get_gdk_color()) self.scroll_right.set_focus_on_click(False) self.scroll_right_event.modify_bg(gtk.STATE_NORMAL, sugar.graphics.style.COLOR_TOOLBAR_GREY.get_gdk_color()) self.scroll_right.modify_bg(gtk.STATE_ACTIVE, sugar.graphics.style.COLOR_BUTTON_GREY.get_gdk_color()) self.scroll_left.viewport = self.viewport self.scroll_right.viewport = self.viewport self.connect_after("size-allocate", self._sizeAllocateCb) def _sizeAllocateCb(self, widget, event ): self.viewport.notify('can-scroll') def get_children(self): return self.viewport.traybar.get_children() def add_item(self, item, index=-1): self.viewport.traybar.insert(item, index) def remove_item(self, item): self.viewport.traybar.remove(item) def get_item_index(self, item): return self.viewport.traybar.get_item_index(item) def scroll_to_end(self): self.viewport._scroll_to_end()