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
|
"""Example of using a pyface Timer."""
from pyface.timer.api import Timer
from pyface.api import GUI, ApplicationWindow
from pyface.action.api import Action, MenuManager, MenuBarManager
from traits.api import Any, Int
class MainWindow(ApplicationWindow):
""" The main application window. """
# The pyface Timer.
my_timer = Any()
# Count each time the timer task executes.
counter = Int()
def __init__(self, **traits):
""" Creates a new application window. """
# Base class constructor.
super().__init__(**traits)
# Add a menu bar.
self.menu_bar_manager = MenuBarManager(
MenuManager(
Action(name="Start Timer", on_perform=self._start_timer),
Action(name="Stop Timer", on_perform=self._stop_timer),
Action(name="E&xit", on_perform=self.close),
name="&File",
)
)
return
def _start_timer(self):
"""Called when the user selects "Start Timer" from the menu."""
if self.my_timer is None:
# First call, so create a Timer. It starts automatically.
self.my_timer = Timer(500, self._timer_task)
else:
self.my_timer.Start()
def _stop_timer(self):
"""Called when the user selecte "Stop Timer" from the menu."""
if self.my_timer is not None:
self.my_timer.Stop()
def _timer_task(self):
"""The method run periodically by the timer."""
self.counter += 1
print("counter = %d" % self.counter)
if __name__ == "__main__":
gui = GUI()
# Create and open the main window.
window = MainWindow()
window.open()
# Start the GUI event loop!
gui.start_event_loop()
|
