GnomeShellGenericMonitor/examples/timer.py

#!/usr/bin/python3

#
# This program 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.
#
# This program 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 <https://www.gnu.org/licenses/>.
#

'''
Display two timers with interactive behaviour :
  * One timer is white and background become red after one hour
  * Second timer is blue

  * Click : start/stop timer
  * Double click : reset timer
  * Right click : switch timer
'''

import time
from threading import Thread
from signal import signal, SIGINT
import sys
from genericmonitor import GenericMonitor, GenericMonitorGroup, GenericMonitorItem

class TimerThread(Thread,GenericMonitor):
       
    def stop(self):
        self._stopLoop = True
        self.stopMainLoop()

    def _displayTimerValue(self):
        item = GenericMonitorItem('timer', onClick='signal', box='right')
        group = GenericMonitorGroup('Timer', item)
        curValue = self.timers[self.curTimer]
        item.text = '%02d:%02d' % (int(curValue/60)%60, curValue%60)
        if curValue >= (60*60):
            item.text = '%02d:%s' % (int(curValue/(60*60)), item.text)
        if self.curTimer == 0:
            style = 'color:white'
            if curValue > (60*60):
                style += ';background-color:red'
        else:
            style = 'color:#215D9C'
        item.style = style
        self.notify(group)

    def run(self):
        self.setupMonitor()
        self.timers = [0, 0]
        self.curTimer = 0
        self.timerPaused = False
        self._stopLoop = False
        while not self._stopLoop:
            time.sleep(1)
            if not self.timerPaused:
                self.timers[self.curTimer] += 1
                self._displayTimerValue()

    def _forMe(self, sender):
        return sender == 'timer@Timer'

    def onClick(self, sender):
        if not self._forMe(sender): return
        self.timerPaused = not self.timerPaused
        self._displayTimerValue()

    def onRightClick(self, sender):
        if not self._forMe(sender): return
        if self.curTimer == 0:
            self.curTimer = 1
        else:
            self.curTimer = 0
        self.timers[self.curTimer] = 0
        self.timerPaused = False
        self._displayTimerValue()
    
    def onDblClick(self, sender):
        if not self._forMe(sender): return
        self.timers[self.curTimer] = 0
        self.timerPaused = True
        self._displayTimerValue()

    def onActivate(self):
        super().onActivate()
        self.timerPaused = self._lastState
        self._displayTimerValue()

    def onDeactivate(self):
        super().onDeactivate()
        self._lastState = self.timerPaused
        if not self.timerPaused and self.curTimer == 0:
            self.timerPaused = True
    
def signalHandler(signal_received, frame):
    timerThread.stop()
    timerThread.join()
    groups = {'groups':['Timer']}
    timerThread.deleteGroups(groups)
    sys.exit(0)

timerThread = TimerThread()
timerThread.start()

signal(SIGINT, signalHandler)

timerThread.runMainLoop()