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#!/usr/bin/env python
'''
This widget can be used to show small popup windows showing messages.
Copyright 2012 Norbert Schechner
nieson@web.de
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
'''
# TODO : There is still an error if you use top_to_bottom = False
# the messages are placed correct, until you reached the given max, then
# the popup will jump one message height down. As far as I found out till now
# it is caused because the height of the first message is not taken in care
# calculating the hight of the popup.
# I disabled the frame widget to save space, but the use would be more beautifull
import gtk
import gobject
import pango
class Notification(gtk.Window):
'''Notification(gtk.Window)
will show popup windows with messages and icon
'''
__gtype_name__ = 'Notification'
__gproperties__ = {
'icon_size' : (gobject.TYPE_INT, 'Icon Size', 'Sets the size of the displayed button icon',
1, 96, 16, gobject.PARAM_READWRITE | gobject.PARAM_CONSTRUCT),
'message_width' : (gobject.TYPE_INT, 'Message Width', 'Sets the message width in pixel',
0, 800, 300, gobject.PARAM_READWRITE | gobject.PARAM_CONSTRUCT),
'x_pos' : (gobject.TYPE_INT, 'Frame X Position', 'Sets the frame X position in pixel',
0, 1280, 0, gobject.PARAM_READWRITE | gobject.PARAM_CONSTRUCT),
'y_pos' : (gobject.TYPE_INT, 'Frame Y Position', 'Sets the frame Y position in pixel',
0, 1024, 0, gobject.PARAM_READWRITE | gobject.PARAM_CONSTRUCT),
'font' : (gobject.TYPE_STRING, 'Pango Font', 'Display font to use',
"sans 10", gobject.PARAM_READWRITE | gobject.PARAM_CONSTRUCT),
'max_messages' : (gobject.TYPE_INT, 'Max Messages', 'Sets the maximum number of messages to show',
2, 100, 10, gobject.PARAM_READWRITE | gobject.PARAM_CONSTRUCT),
'top_to_bottom' : (gobject.TYPE_BOOLEAN, 'Show from top to bottom', 'Show the second notification under the first one or on top?',
True, gobject.PARAM_READWRITE | gobject.PARAM_CONSTRUCT),
'use_frames' : (gobject.TYPE_BOOLEAN, 'Use Frames for messages', 'You can separate the messages using frames, but you will need more space',
True, gobject.PARAM_READWRITE | gobject.PARAM_CONSTRUCT),
}
__gproperties = __gproperties__
__gsignals__ = {
'message_deleted': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE, (gobject.TYPE_PYOBJECT,)),
}
# build the main gui
def __init__(self):
gtk.Window.__init__(self)
self.connect('destroy', lambda*w:gtk.main_quit())
self.messages = []
self.popup = gtk.Window(gtk.WINDOW_POPUP)
self.vbox = gtk.VBox()
self.popup.add(self.vbox)
self.icon_size = 16
self.message_width = 200
self.x_pos = 20
self.y_pos = 20
self.font = 'sans 10'
self.max_messages = 10
self.top_to_bottom = True
self.use_frames = False
self.height = 0
# this will fill the main gui with the frames, containing the messages or errors
def _show_message(self, message):
number = message[0]
text = message[1]
if message[2]:
icon_file_name = message[2]
if self.use_frames:
frame = gtk.Frame()
frame.set_label("")
hbox = gtk.HBox()
hbox.set_property('spacing', 5)
if self.use_frames:
frame.add(hbox)
labelnumber = gtk.Label(number)
hbox.pack_start(labelnumber)
icon = gtk.Image()
if message[2]:
icon.set_from_file(icon_file_name)
else:
icon.set_from_stock(gtk.STOCK_DIALOG_ERROR, self.icon_size)
hbox.pack_start(icon)
label = gtk.Label()
label.set_line_wrap(True)
label.set_line_wrap_mode(pango.WRAP_CHAR)
label.set_text(text)
label.set_size_request(self.message_width, -1)
font_desc = pango.FontDescription(self.font)
label.modify_font(font_desc)
hbox.pack_start(label)
btn_close = gtk.Button()
image = gtk.Image()
image.set_from_stock(gtk.STOCK_CANCEL, self.icon_size)
btn_close.set_image(image)
btn_close.set_border_width(2)
btn_close.connect('clicked', self._on_btn_close_clicked, labelnumber.get_text())
hbox.pack_start(btn_close)
if self.use_frames:
widget = frame
else:
widget = hbox
if self.top_to_bottom:
self.vbox.pack_end(widget)
else:
self.vbox.pack_start(widget)
if self.use_frames:
frame.show()
label.show()
btn_close.show()
hbox.show()
icon.show()
# labelnumber.show()
self.vbox.show()
# self.popup.show()
# add a message, the message is a string, it will be line wraped
# if to long for the frame
def add_message(self, message, icon_file_name):
'''Notification.add_message(messagetext, icon_file_name)
messagetext = a string to display
icon_file_name = a valid absolut path to an icon or None
'''
self.popup.hide()
self.popup.resize(1, 1)
number_of_messages = len(self.messages)
if number_of_messages == self.max_messages:
self.del_first()
number_of_messages = len(self.messages)
self.messages.append([number_of_messages, message, icon_file_name])
self._show_message(self.messages[number_of_messages])
if not self.top_to_bottom:
self.height = self.popup.get_size()[1]
# print(self.y_pos, self.popup.get_size(),self.height)
self.popup.move(self.x_pos, self.y_pos - self.height)
self.popup.show()
# print(self.popup.get_position())
def del_first(self):
'''del_first()
delete the first message
'''
if len(self.messages) != 0:
del self.messages[0]
self._refill_messages()
self.emit("message_deleted", self.messages)
def del_last(self):
'''del_last()
delete the last message
'''
if len(self.messages) != 0:
del self.messages[len(self.messages) - 1]
self._refill_messages()
self.emit("message_deleted", self.messages)
# this will delete a message, if the user gives a valid number it will be deleted,
# but the user must take care to use the correct number
# if you give a value of "-1" all messages will be deletet
def del_message(self, messagenumber):
'''del_message(messagenumber)
delete the message with the given number
messagenumber = integer
-1 will erase all messages
'''
self.emit("message_deleted", self.messages)
if messagenumber == -1:
self.messages = []
self._refill_messages()
return True
elif messagenumber > len(self.messages) or messagenumber < 0:
self.add_message(_('Error trying to delet the message with number %s' % messagenumber), None)
return False
try:
del self.messages[int(messagenumber)]
except:
return False
self._refill_messages()
return True
# this is the recomendet way to delete a message, by clicking the
# close button of the coresponding frame
def _on_btn_close_clicked(self, widget, labelnumber):
del self.messages[int(labelnumber)]
self.emit("message_deleted", self.messages)
self._refill_messages()
def _refill_messages(self):
# first we have to hide all messages, otherwise the popup window will mantain
# all the old messages
self.popup.hide_all()
# then we rezise the popup window to a very small size, otherwise the dimensions
# of the window will be mantained
self.popup.resize(1, 1)
# if it was the last message, than we can hide the popup window
if len(self.messages) == 0:
self.popup.hide()
return
else: # or we do refill the popup window
index = 0
for message in self.messages:
self.messages[index][0] = index
self._show_message(message)
index += 1
if not self.top_to_bottom:
self.height = self.popup.get_size()[1]
self.popup.move(self.x_pos, self.y_pos - self.height)
self.popup.show()
def do_get_property(self, property):
name = property.name.replace('-', '_')
if name in self.__gproperties.keys():
return getattr(self, name)
else:
raise AttributeError('unknown iconview get_property %s' % property.name)
def do_set_property(self, property, value):
# print(property,"=",value)
try:
name = property.name.replace('-', '_')
if name in self.__gproperties.keys():
setattr(self, name, value)
self.queue_draw()
if name == 'icon_size':
self.icon_size = value
if name == 'message_width':
self.message_width = value
if name == 'font':
self.font = value
if name == 'x_pos':
self.x_pos = value
if name == 'y_pos':
self.y_pos = value
if name == 'max_messages':
self.max_messages = value
if name == 'top_to_bottom':
self.top_to_bottom = value
if name == 'use_frames':
self.use_frames = value
else:
raise AttributeError('unknown iconview set_property %s' % property.name)
except:
print('Attribute error', property, "and", type(value) , value)
pass
# for testing without glade editor:
def main():
notification = Notification()
notification.add_message('Halo World out there', '/home/emcmesa/linuxcnc-dev/share/gscreen/images/std_info.gif')
notification.add_message('Hallo World ', '/home/emcmesa/linuxcnc-dev/share/gscreen/images/std_info.gif')
notification.show()
def debug(self, text):
print "debug", text
notification.connect("message_deleted", debug)
gtk.main()
if __name__ == "__main__":
main()
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