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# Copyright (C) 2007, One Laptop Per Child
#
# 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
from sugar.graphics.toolbutton import ToolButton
from sugar.graphics.icon import Icon
class _TrayViewport(gtk.Viewport):
__gproperties__ = {
'can-scroll' : (bool, None, None, False,
gobject.PARAM_READABLE),
}
def __init__(self):
self._can_scroll = False
gobject.GObject.__init__(self)
self.set_shadow_type(gtk.SHADOW_NONE)
self.traybar = gtk.Toolbar()
self.traybar.set_show_arrow(False)
self.add(self.traybar)
self.traybar.show()
self.connect('size_allocate', self._size_allocate_cb)
def scroll_right(self):
adj = self.get_hadjustment()
new_value = adj.value + self.allocation.width
adj.value = min(new_value, adj.upper - self.allocation.width)
def scroll_left(self):
adj = self.get_hadjustment()
new_value = adj.value - self.allocation.width
adj.value = max(adj.lower, new_value)
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 bar_requisition[0] < allocation.width:
can_scroll = False
else:
can_scroll = True
if can_scroll != self._can_scroll:
self._can_scroll = can_scroll
self.notify('can-scroll')
class HTray(gtk.HBox):
def __init__(self, **kwargs):
gobject.GObject.__init__(self, **kwargs)
self._scroll_left = gtk.Button()
self._scroll_left.set_relief(gtk.RELIEF_NONE)
self._scroll_left.connect('clicked', self._scroll_left_cb)
icon = Icon(icon_name='go-left', icon_size=gtk.ICON_SIZE_MENU)
self._scroll_left.set_image(icon)
icon.show()
self.pack_start(self._scroll_left, False)
self._viewport = _TrayViewport()
self._viewport.connect('notify::can-scroll',
self._viewport_can_scroll_changed_cb)
self.pack_start(self._viewport)
self._viewport.show()
self._scroll_right = gtk.Button()
self._scroll_right.set_relief(gtk.RELIEF_NONE)
self._scroll_right.connect('clicked', self._scroll_right_cb)
icon = Icon(icon_name='go-right', icon_size=gtk.ICON_SIZE_MENU)
self._scroll_right.set_image(icon)
icon.show()
self.pack_start(self._scroll_right, False)
def _viewport_can_scroll_changed_cb(self, viewport, pspec):
if self._viewport.props.can_scroll:
self._scroll_left.show()
self._scroll_right.show()
def _scroll_left_cb(self, button):
self._viewport.scroll_left()
def _scroll_right_cb(self, button):
self._viewport.scroll_right()
def add_item(self, item, index=-1):
self._viewport.traybar.insert(item, index)
def remove_item(self, index):
self._viewport.traybar.remove(item)
class TrayButton(ToolButton):
def __init__(self, **kwargs):
ToolButton.__init__(self, **kwargs)
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