1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
|
#!/usr/bin/python
# .+
#
# .identifier : $Id:$
# .context : Application View Controller
# .title : A random generation of count down windows (GTK)
# .kind : python source
# .author : Fabrizio Pollastri
# .site : Torino - Italy
# .creation : 11-Feb-2008
# .copyright : (c) 2008 Fabrizio Pollastri.
# .license : GNU General Public License (see below)
#
# This file is part of "AVC, Application View Controller".
#
# AVC 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 3 of the License, or
# (at your option) any later version.
#
# AVC 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, see <http://www.gnu.org/licenses/>.
#
# .-
import gobject #--
import gtk #- gimp tool kit bindings
import gtk.glade # glade bindings
from avc import * # AVC
from random import randint # random integer generator
GLADE_XML_MAIN = 'gtk_countdown_main.glade' # main window glade descriptor
GLADE_XML_CD = 'gtk_countdown.glade' # count down window glade descriptor
TOPLEVEL_NAME = 'countdown' # name of the top level widget
FIRST_COUNT_DELAY = 1000 # let avc_init be called
COUNTDOWN_PERIOD = 500 # count down at 2 unit per second
MAX_CREATION_PERIOD = 4000 # create a new count down at 1/2 this
class Countdown(AVC):
"""
A countdown counter displayed in a Label widget. Count starts at given
value. When count reaches zero the counter and its GUI are destroyed.
"""
def __init__(self,count_start=10):
# create GUI
self.glade = gtk.glade.XML(GLADE_XML_CD)
# autoconnect GUI signal handlers
self.glade.signal_autoconnect(self)
# init the counter variable
self.counter = count_start
# connect counter variable with label widget
self.avc_connect(self.glade.get_widget(TOPLEVEL_NAME))
# start count down
gobject.timeout_add(COUNTDOWN_PERIOD,self.decrementer)
def decrementer(self):
"Counter decrementer. Return False to destroy previous timer."
self.counter -= 1
if self.counter:
# if counter not zero: reschedule count timer
gobject.timeout_add(COUNTDOWN_PERIOD,self.decrementer)
else:
# counter reached zero: destroy this countdown and its GUI
self.glade.get_widget(TOPLEVEL_NAME).destroy()
return False
class Example(AVC):
"""
Continuously create at random intervals windows with a countdown from 10 to 0.
When a countdown reaches zero, its window is destroyed. Also create a main
window with a "close all" button.
"""
def __init__(self):
# create main window
self.glade = gtk.glade.XML(GLADE_XML_MAIN)
# create the first countdown after avc_init call
gobject.timeout_add(FIRST_COUNT_DELAY,self.new_countdown)
# close all button connected variable
self.close_all = False
# autoconnect GUI signal handlers
self.glade.signal_autoconnect(self)
def new_countdown(self,count_start=10):
"Create a new countdown"
# create a new countdown
Countdown(count_start)
# autocall after a random delay
gobject.timeout_add(randint(1,MAX_CREATION_PERIOD),self.new_countdown)
return False # destroy previous timer
def on_destroy(self,window):
"Terminate program at window destroy"
gtk.main_quit()
def close_all_changed(self,value):
"Terminate program at 'close all' button pressing"
gtk.main_quit()
#### MAIN
example = Example() # instantiate the application
example.avc_init() # connect widgets with variables
gtk.main() # run GTK event loop until quit
#### END
|
