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# Copyright (c) 2007, Enthought, Inc.
# License: BSD Style.
"""
This demo illustrates use of the LEDEditor for displaying numeric values
using a simulated LED display control.
"""
from __future__ import absolute_import
from threading \
import Thread
from time \
import sleep
from traits.api \
import HasTraits, Instance, Int, Bool, Float
from traitsui.api \
import View, Item, HGroup, Handler, UIInfo, spring
from traitsui.wx.extra.led_editor \
import LEDEditor
# Handler class for the LEDDemo class view:
class LEDDemoHandler(Handler):
# The UIInfo object associated with the UI:
info = Instance(UIInfo)
# Is the demo currently running:
running = Bool(True)
# Is the thread still alive?
alive = Bool(True)
def init(self, info):
self.info = info
Thread(target=self._update_counter).start()
def closed(self, info, is_ok):
self.running = False
while self.alive:
sleep(.05)
def _update_counter(self):
while self.running:
self.info.object.counter1 += 1
self.info.object.counter2 += .001
sleep(.01)
self.alive = False
# The main demo class:
class LEDDemo(HasTraits):
# A counter to display:
counter1 = Int
# A floating point value to display:
counter2 = Float
# The traits view:
view = View(
Item('counter1',
label='Left aligned',
editor=LEDEditor(alignment='left')
),
Item('counter1',
label='Center aligned',
editor=LEDEditor(alignment='center')
),
Item('counter1',
label='Right aligned',
editor=LEDEditor() # default = 'right' aligned
),
Item('counter2',
label='Float value',
editor=LEDEditor(format_str='%.3f')
),
'_',
HGroup(
Item('counter1',
label='Left',
height=-40,
width=120,
editor=LEDEditor(alignment='left')
),
spring,
Item('counter1',
label='Center',
height=-40,
width=120,
editor=LEDEditor(alignment='center')
),
spring,
Item('counter1',
label='Right',
height=-40,
width=120,
editor=LEDEditor() # default = 'right' aligned
),
spring,
Item('counter2',
label='Float',
height=-40,
width=120,
editor=LEDEditor(format_str='%.3f')
)
),
title='LED Editor Demo',
buttons=['OK'],
handler=LEDDemoHandler
)
# Create the demo:
demo = LEDDemo()
# Run the demo (if invoked from the command line):
if __name__ == '__main__':
demo.configure_traits()
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