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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 wx import xrc # xml resource support
from avc import * # AVC
WXGLADE_XML = 'wx_counter.xrc' # GUI wxGlade descriptor
LOW_SPEED = 0.5 #--
HIGH_SPEED = 0.1 #- low and high speed period (ms)
class ExampleGUI(wx.PySimpleApp):
"Counter GUI creation"
def __init__(self):
# init wx application base class
wx.PySimpleApp.__init__(self)
# create GUI
xml_resource = xrc.XmlResource(WXGLADE_XML)
self.root = xml_resource.LoadFrame(None,'frame_1')
self.root.Show()
# timer
self.timer1 = None
def timer(self,period,function):
"Start a wx timer calling back 'function' every 'period' seconds."
if not self.timer1:
self.timer1 = wx.Timer(self.root,wx.NewId())
self.root.Bind(wx.EVT_TIMER,function,self.timer1)
self.timer1.Start(period * 1000,oneShot=True)
class ExampleMain(AVC):
"""
A counter displayed in a Label widget whose count speed can be
accelerated by checking a check button.
"""
def __init__(self,gui):
# save gui
self.gui = gui
# the counter variable and its speed status
self.counter = 0
self.high_speed = False
# start incrementer timer
self.gui.timer(LOW_SPEED,self.incrementer)
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.gui.timer(period,self.incrementer)
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_gui = ExampleGUI() # create the application GUI
example = ExampleMain(example_gui) # instantiate the application
example.avc_init() # connect widgets with variables
example_gui.MainLoop() # run wx event loop until quit
#### END
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