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wordclock.py
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#!/usr/bin/env python
import ConfigParser
from importlib import import_module
import netifaces
import inspect
import os
import time
import threading
from shutil import copyfile
import wordclock_tools.wordclock_display as wcd
import wordclock_interfaces.event_handler as wci
import wordclock_interfaces.web_interface as wciweb
class wordclock:
"""
The class, which makes the wordclock run...
"""
def __init__(self):
"""
Initializations, executed at every startup of the wordclock
"""
# Get path of the directory where this file is stored
self.basePath = os.path.dirname(os.path.abspath(inspect.getfile(inspect.currentframe())))
# Get wordclock configuration from config-file
pathToConfigFile = self.basePath + '/wordclock_config/wordclock_config.cfg'
if not os.path.exists(pathToConfigFile):
pathToConfigFileExample = self.basePath + '/wordclock_config/wordclock_config.example.cfg'
if not os.path.exists(pathToConfigFileExample):
print('Error: No config-file available!')
print(' Expected ' + pathToConfigFile + ' or ' + pathToConfigFileExample)
raise Exception('Missing config-file')
copyfile(pathToConfigFileExample, pathToConfigFile)
print('Warning: No config-file specified! Was created from example-config!')
print('Parsing ' + pathToConfigFile)
self.config = ConfigParser.ConfigParser()
self.config.read(pathToConfigFile)
# Add to the loaded configuration the current base path to provide it
# to other classes/plugins for further usage
self.config.set('wordclock', 'base_path', self.basePath)
self.developer_mode_active = self.config.getboolean('wordclock', 'developer_mode')
if self.developer_mode_active:
# must be created first
import wx
self.app = wx.App()
# Create object to interact with the wordclock using the interface of your choice
self.wci = wci.event_handler()
if not self.developer_mode_active:
import wordclock_interfaces.gpio_interface as wcigpio
self.gpio = wcigpio.gpio_interface(self.config, self.wci)
# Create object to display any content on the wordclock display
# Its implementation depends on your (individual) wordclock layout/wiring
self.wcd = wcd.wordclock_display(self.config, self.wci)
# Define path to general icons (not plugin-specific)
self.pathToGeneralIcons = os.path.join(self.basePath, 'icons', self.wcd.dispRes())
# Assemble path to plugin directory
plugin_dir = os.path.join(self.basePath, 'wordclock_plugins')
# Assemble list of all available plugins
plugins = (plugin for plugin in os.listdir(plugin_dir) if os.path.isdir(os.path.join(plugin_dir, plugin)))
# Import plugins, which can be operated by the wordclock:
index = 0 # A helper variable (only incremented on successful import)
self.plugins = []
for plugin in plugins:
# Check the config-file, whether to activate or deactivate the plugin
try:
if not self.config.getboolean('plugin_' + plugin, 'activate'):
print('Skipping plugin ' + plugin + ' since it is set to activate=false in the config-file.')
continue
except:
print(' INFO: No activate-flag set for plugin ' + plugin + ' within the config-file. Will be imported.')
try:
# Perform a minimal (!) validity check
# Check, if plugin is valid (if the plugin.py is provided)
if not os.path.isfile(os.path.join(plugin_dir, plugin, 'plugin.py')):
raise
self.plugins.append(import_module('wordclock_plugins.' + plugin + '.plugin').plugin(self.config))
# Search for default plugin to display the time
if plugin == 'time_default':
print(' Selected "' + plugin + '" as default plugin')
self.default_plugin = index
print('Imported plugin ' + str(index) + ': "' + plugin + '".')
index += 1
except Exception as e:
print(e)
print('Failed to import plugin ' + plugin + '!')
# Create object to interact with the wordclock using the interface of your choice
self.plugin_index = 0
self.wciweb = wciweb.web_interface(self)
def startup(self):
"""
Startup behavior
"""
if self.config.getboolean('wordclock', 'show_startup_message'):
startup_message = self.config.get('wordclock', 'startup_message')
if startup_message == "ShowIP":
interface = self.config.get('plugin_ip_address', 'interface')
self.wcd.showText("IP: " + netifaces.ifaddresses(interface)[2][0]['addr'])
else:
self.wcd.showText(startup_message)
def runPlugin(self):
"""
Runs the currently selected plugin
"""
try:
print('Running plugin ' + self.plugins[self.plugin_index].name + '.')
self.plugins[self.plugin_index].run(self.wcd, self.wci)
except Exception as e:
print(e)
print('ERROR: In plugin ' + self.plugins[self.plugin_index].name + '.')
self.wcd.setImage(os.path.join(self.pathToGeneralIcons, 'error.png'))
# Cleanup display after exiting plugin
self.wcd.resetDisplay()
def runNext(self, plugin_index=None):
self.plugin_index = plugin_index if plugin_index is not None else self.default_plugin
self.wci.setEvent(self.wci.EVENT_NEXT_PLUGIN_REQUESTED)
def run(self):
"""
Makes the wordclock run...
"""
# Run the default plugin
self.plugin_index = self.default_plugin
# Run the wordclock forever
while True:
self.runPlugin()
# If no plugin was requested yet, loop through menu to select next plugin
if self.wci.nextAction == wci.next_action.RUN_DEFAULT_PLUGIN:
self.plugin_index = self.default_plugin
elif self.wci.nextAction == wci.next_action.GOTO_MENU:
while True:
# The showIcon-command expects to have a plugin logo available
self.wcd.showIcon(plugin=self.plugins[self.plugin_index].name, iconName='logo')
time.sleep(self.wci.lock_time)
evt = self.wci.waitForEvent()
if evt == self.wci.EVENT_BUTTON_LEFT:
self.plugin_index -= 1
if self.plugin_index == -1:
self.plugin_index = len(self.plugins) - 1
time.sleep(self.wci.lock_time)
if evt == self.wci.EVENT_BUTTON_RETURN:
time.sleep(self.wci.lock_time)
break
if evt == self.wci.EVENT_EXIT_PLUGIN or evt == self.wci.EVENT_NEXT_PLUGIN_REQUESTED:
break
if evt == self.wci.EVENT_BUTTON_RIGHT:
self.plugin_index += 1
if self.plugin_index == len(self.plugins):
self.plugin_index = 0
time.sleep(self.wci.lock_time)
def run_forever(self):
self.startup()
self.run()
if __name__ == '__main__':
#word_clock = wordclock()
#word_clock.startup()
#word_clock.run()
word_clock = wordclock()
developer_mode = word_clock.developer_mode_active
if not developer_mode:
word_clock.run_forever()
else:
print("We are not on raspberry...open simulation window")
wordclock_thread = threading.Thread(target=word_clock.run_forever)
# Exit the server thread when the main thread terminates
wordclock_thread.daemon = True
wordclock_thread.start()
word_clock.app.MainLoop()