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/usr/share/pyshared/sugar/graphics/toolbutton.py is in python-sugar-toolkit-0.88 0.88.1-4.

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# Copyright (C) 2007, Red Hat, Inc.
# Copyright (C) 2008, 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.

"""
STABLE.
"""

import logging

import gtk
import gobject

from sugar.graphics.icon import Icon
from sugar.graphics.palette import Palette, ToolInvoker


def _add_accelerator(tool_button):
    if not tool_button.props.accelerator or not tool_button.get_toplevel() or \
            not tool_button.child:
        return

    # TODO: should we remove the accelerator from the prev top level?

    accel_group = tool_button.get_toplevel().get_data('sugar-accel-group')
    if not accel_group:
        logging.warning('No gtk.AccelGroup in the top level window.')
        return

    keyval, mask = gtk.accelerator_parse(tool_button.props.accelerator)
    # the accelerator needs to be set at the child, so the gtk.AccelLabel
    # in the palette can pick it up.
    tool_button.child.add_accelerator('clicked', accel_group, keyval, mask,
                                      gtk.ACCEL_LOCKED | gtk.ACCEL_VISIBLE)


def _hierarchy_changed_cb(tool_button, previous_toplevel):
    _add_accelerator(tool_button)


def setup_accelerator(tool_button):
    _add_accelerator(tool_button)
    tool_button.connect('hierarchy-changed', _hierarchy_changed_cb)


class ToolButton(gtk.ToolButton):

    __gtype_name__ = "SugarToolButton"

    def __init__(self, icon_name=None, **kwargs):
        self._accelerator = None
        self._tooltip = None
        self._palette_invoker = ToolInvoker()

        gobject.GObject.__init__(self, **kwargs)

        self._palette_invoker.attach_tool(self)

        if icon_name:
            self.set_icon(icon_name)

        self.get_child().connect('can-activate-accel',
                                 self.__button_can_activate_accel_cb)

        self.connect('destroy', self.__destroy_cb)

    def __destroy_cb(self, icon):
        if self._palette_invoker is not None:
            self._palette_invoker.detach()

    def __button_can_activate_accel_cb(self, button, signal_id):
        # Accept activation via accelerators regardless of this widget's state
        return True

    def set_tooltip(self, tooltip):
        """ Set a simple palette with just a single label.
        """
        if self.palette is None or self._tooltip is None:
            self.palette = Palette(tooltip)
        elif self.palette is not None:
            self.palette.set_primary_text(tooltip)

        self._tooltip = tooltip

        # Set label, shows up when toolbar overflows
        gtk.ToolButton.set_label(self, tooltip)

    def get_tooltip(self):
        return self._tooltip

    tooltip = gobject.property(type=str, setter=set_tooltip,
        getter=get_tooltip)

    def set_accelerator(self, accelerator):
        self._accelerator = accelerator
        setup_accelerator(self)

    def get_accelerator(self):
        return self._accelerator

    accelerator = gobject.property(type=str, setter=set_accelerator,
            getter=get_accelerator)

    def set_icon(self, icon_name):
        icon = Icon(icon_name=icon_name)
        self.set_icon_widget(icon)
        icon.show()

    def create_palette(self):
        return None

    def get_palette(self):
        return self._palette_invoker.palette

    def set_palette(self, palette):
        self._palette_invoker.palette = palette

    palette = gobject.property(
        type=object, setter=set_palette, getter=get_palette)

    def get_palette_invoker(self):
        return self._palette_invoker

    def set_palette_invoker(self, palette_invoker):
        self._palette_invoker.detach()
        self._palette_invoker = palette_invoker

    palette_invoker = gobject.property(
        type=object, setter=set_palette_invoker, getter=get_palette_invoker)

    def do_expose_event(self, event):
        child = self.get_child()
        allocation = self.get_allocation()
        if self.palette and self.palette.is_up():
            invoker = self.palette.props.invoker
            invoker.draw_rectangle(event, self.palette)
        elif child.state == gtk.STATE_PRELIGHT:
            child.style.paint_box(event.window, gtk.STATE_PRELIGHT,
                                  gtk.SHADOW_NONE, event.area,
                                  child, "toolbutton-prelight",
                                  allocation.x, allocation.y,
                                  allocation.width, allocation.height)

        gtk.ToolButton.do_expose_event(self, event)

    def do_clicked(self):
        if self.palette:
            self.palette.popdown(True)