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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.
from gettext import gettext as _
import gtk
import gobject
import hippo
import math
from sugar.graphics import style
from sugar.graphics.icon import Icon
class Alert(gtk.EventBox, gobject.GObject):
"""UI interface for Alerts
Alerts are used inside the activity window instead of being a
separate popup window. They do not hide canvas content. You can
use add_alert(widget) and remove_alert(widget) inside your activity
to add and remove the alert. You can set the position (bottom=-1,
top=0,1) for alerts global for the window by changing alert_position,
default is bottom.
Properties:
'title': the title of the alert,
'message': the message of the alert,
'icon': the icon that appears at the far left
See __gproperties__
"""
__gtype_name__ = 'SugarAlert'
__gsignals__ = {
'response': (gobject.SIGNAL_RUN_FIRST,
gobject.TYPE_NONE, ([object]))
}
__gproperties__ = {
'title' : (str, None, None, None,
gobject.PARAM_READWRITE),
'msg' : (str, None, None, None,
gobject.PARAM_READWRITE),
'icon' : (object, None, None,
gobject.PARAM_WRITABLE)
}
def __init__(self, **kwargs):
gobject.GObject.__init__(self)
self.set_visible_window(True)
self._hbox = gtk.HBox()
self.add(self._hbox)
self._title = None
self._msg = None
self._icon = None
self._timeout = 0
self._buttons = {}
self._msg_box = gtk.VBox()
self._title_label = gtk.Label()
size = style.zoom(style.GRID_CELL_SIZE * 0.5)
self._title_label.set_alignment(0, 0.5)
self._title_label.set_padding(style.DEFAULT_SPACING, 0)
self._msg_box.pack_start(self._title_label, False)
self._title_label.show()
self._msg_label = gtk.Label()
self._msg_label.set_alignment(0, 0.5)
self._msg_label.set_padding(style.DEFAULT_SPACING, 0)
self._msg_box.pack_start(self._msg_label, False)
self._msg_label.show()
self._hbox.pack_start(self._msg_box)
self._buttons_box = gtk.HButtonBox()
self._buttons_box.set_layout(gtk.BUTTONBOX_END)
self._buttons_box.set_spacing(style.DEFAULT_SPACING)
self._hbox.pack_start(self._buttons_box)
self._buttons_box.show()
self._msg_box.show()
self._hbox.show()
self.show()
def do_set_property(self, pspec, value):
if pspec.name == 'title':
if self._title != value:
self._title = value
self._title_label.set_markup("<b>" + self._title + "</b>")
elif pspec.name == 'msg':
if self._msg != value:
self._msg = value
self._msg_label.set_markup(self._msg)
elif pspec.name == 'icon':
if self._icon != value:
self._icon = value
self._hbox.pack_start(self._icon)
self._hbox.reorder_child(self._icon, 0)
def do_get_property(self, pspec):
if pspec.name == 'title':
return self._title
elif pspec.name == 'msg':
return self._msg
def add_button(self, response_id, label, icon=None, position=-1):
"""Add a button to the alert
response_id: will be emitted with the response signal
a response ID should one of the pre-defined
GTK Response Type Constants or a positive number
label: that will occure right to the buttom
icon: this can be a SugarIcon or a gtk.Image
position: the position of the button in the box (optional)
"""
button = gtk.Button()
self._buttons[response_id] = button
if icon is not None:
button.set_image(icon)
button.set_label(label)
self._buttons_box.pack_start(button)
button.show()
button.connect('clicked', self.__button_clicked_cb, response_id)
if position != -1:
self._buttons_box.reorder_child(button, position)
return button
def remove_button(self, response_id):
"""Remove a button from the alert by the given button id"""
self._buttons_box.remove(self._buttons[id])
def _response(self, id):
"""Emitting response when we have a result
A result can be that a user has clicked a button or
a timeout has occured, the id identifies the button
that has been clicked and -1 for a timeout
"""
self.emit('response', id)
def __button_clicked_cb(self, button, response_id):
self._response(response_id)
class ConfirmationAlert(Alert):
"""This is a ready-made two button (Cancel,Ok) alert"""
def __init__(self, **kwargs):
Alert.__init__(self, **kwargs)
icon = Icon(icon_name='dialog-cancel')
cancel_button = self.add_button(gtk.RESPONSE_CANCEL, _('Cancel'), icon)
icon.show()
icon = Icon(icon_name='dialog-ok')
ok_button = self.add_button(gtk.RESPONSE_OK, _('Ok'), icon)
icon.show()
class _TimeoutIcon(hippo.CanvasText, hippo.CanvasItem):
__gtype_name__ = 'AlertTimeoutIcon'
def __init__(self, **kwargs):
hippo.CanvasText.__init__(self, **kwargs)
self.props.orientation = hippo.ORIENTATION_HORIZONTAL
self.props.border_left = style.DEFAULT_SPACING
self.props.border_right = style.DEFAULT_SPACING
def do_paint_background(self, cr, damaged_box):
[width, height] = self.get_allocation()
x = width * 0.5
y = height * 0.5
radius = min(width * 0.5, height * 0.5)
hippo.cairo_set_source_rgba32(cr, self.props.background_color)
cr.arc(x, y, radius, 0, 2*math.pi)
cr.fill_preserve()
class TimeoutAlert(Alert):
"""This is a ready-made two button (Cancel,Continue) alert
It times out with a positive reponse after the given amount of seconds.
"""
def __init__(self, timeout=5, **kwargs):
Alert.__init__(self, **kwargs)
self._timeout = timeout
icon = Icon(icon_name='dialog-cancel')
cancel_button = self.add_button(gtk.RESPONSE_CANCEL, _('Cancel'), icon)
icon.show()
self._timeout_text = _TimeoutIcon(
text=self._timeout,
color=style.COLOR_BUTTON_GREY.get_int(),
background_color=style.COLOR_WHITE.get_int())
canvas = hippo.Canvas()
canvas.set_root(self._timeout_text)
canvas.show()
self.add_button(gtk.RESPONSE_OK, _('Continue'), canvas)
gobject.timeout_add(1000, self.__timeout)
def __timeout(self):
self._timeout -= 1
self._timeout_text.props.text = self._timeout
if self._timeout == 0:
self._response(gtk.RESPONSE_OK)
return False
return True
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