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#!/usr/bin/python
# .+
#
# .identifier : $Id:$
# .context : Application View Controller
# .title : A counter with count speed control (wx)
# .kind : python source
# .author : Fabrizio Pollastri
# .site : Revello - Italy
# .creation : 24-Nov-2007
# .copyright : (c) 2007 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 wx # wx tool kit bindings
from avc import * # AVC
LOW_SPEED = 500 #--
HIGH_SPEED = 100 #- low and high speed period (ms)
class Example(wx.PySimpleApp,AVC):
"""
A counter displayed in a static text widget whose count speed can be
accelerated by checking a check box.
"""
def __init__(self):
## create GUI
# init wx application base class
wx.PySimpleApp.__init__(self)
# create widgets: a top level window, a label and a spin control.
self.root = wx.Frame(None,title='AVC wx counter example',size=(320,60))
label = wx.StaticText(self.root,label='%s',name='counter__label',
size=(100,20))
checkbox = wx.CheckBox(self.root,label='high speed',
name='high_speed__checkbox',size=(100,25))
# layout the label and the check box horizontally into the window
hsizer = wx.BoxSizer(wx.HORIZONTAL)
hsizer.Add((20,10),proportion=1)
hsizer.Add(label,proportion=0.5,flag=wx.CENTER)
hsizer.Add(checkbox,proportion=0.5,flag=wx.CENTER)
hsizer.Add((20,10),proportion=1)
self.root.SetSizer(hsizer)
self.root.Show()
## the counter variable and its speed status
self.counter = 0
self.high_speed = False
# start counter incrementer at low speed
self.timer = wx.Timer(self.root,wx.NewId())
self.root.Bind(wx.EVT_TIMER,self.incrementer,self.timer)
self.timer.Start(LOW_SPEED,oneShot=True)
def incrementer(self,event):
"""
Counter incrementer: increment period = LOW_SPEED, if high speed is False,
increment period = HIGH_SPEED otherwise. Return False to destroy previous
timer.
"""
self.counter += 1
if self.high_speed:
period = HIGH_SPEED
else:
period = LOW_SPEED
self.timer.Start(period,oneShot=True)
def high_speed_changed(self,value):
"Notify change of counting speed to terminal"
if value:
print 'counting speed changed to high'
else:
print 'counting speed changed to low'
#### MAIN
example = Example() # instantiate the application
example.avc_init() # connect widgets with variables
example.MainLoop() # run wx event loop until quit
#### END
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