Timer ipywidget using threads

Timer ipywidget using threads.ipynb

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    "# Timer ipywidget using threads\n",
    "\n",
    "based on https://github.com/sclamons/murraylab_tools/blob/c633ed08abc189b5f18cfbc5288359f267a2487a/murraylab_tools/protocol/protocol.py\n",
    "and\n",
    "https://github.com/sclamons/murraylab_tools/blob/c633ed08abc189b5f18cfbc5288359f267a2487a/examples/protocols.ipynb\n",
    "found by searching 'import ipywidgets as widgets threading .stop' at github.\n",
    "And then when I found `protocol.py` I searched `Timer` in that repo to find the notebook\n",
    "\n",
    "\n",
    "\n",
    "This notebook works in Binder sessions launched from [this jupyter-jsmol repo](https://github.com/fekad/jupyter-jsmol).\n",
    "launch url: https://mybinder.org/v2/gh/fekad/jupyter-jsmol/master?filepath=examples\n",
    "\n",
    "--------\n",
    "\n",
    "Code to illustrate concepts from [here](https://ipywidgets.readthedocs.io/en/latest/examples/Widget%20Asynchronous.html#Updating-a-widget-in-the-background) in relation to a Jupyter discourse question [here](https://discourse.jupyter.org/t/keyboardinterrupt-button-in-voila/7405).\n",
    "\n",
    "Also considered:\n",
    "https://github.com/kjoelovelife/Jetson_nano/blob/e7d2fb6a6db02ba041197768996d066268f22b0a/jetson-dlinano/NVIDIA%20Course/5.%20Thumbs%20Project.md"
   ]
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  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [],
   "source": [
    "import ipywidgets as widgets\n",
    "from IPython.display import display, Javascript\n",
    "from traitlets import Unicode, validate\n",
    "import time\n",
    "import threading\n",
    "\n",
    "class Timer():\n",
    "\n",
    "    def __init__(self,limit=180):\n",
    "        #self.value = Unicode('00:00:00').tag(sync=True)\n",
    "        self.labwidg = widgets.Button(description=\"00:00:00\",layout=lay(120,50))\n",
    "        self.labwidg.on_click(self.threadTimer)\n",
    "        #self.labwidg.style.button_color = \"gree\"\n",
    "        #widgets.Label('00:00:00')\n",
    "        #display(self.labwidg)\n",
    "        self.limit = limit\n",
    "        self.stopTimer = False\n",
    "        self.thread = None\n",
    "        self.buttonState = \"Start\"\n",
    "    def timeit(self, limit=180):\n",
    "        #display(self)\n",
    "        hours = 0\n",
    "        mins = 0\n",
    "        secs = 0\n",
    "        for i in range(1,(limit*60+1)):\n",
    "            if(self.buttonState == \"Start\"):\n",
    "                self.labwidg.button_style=\"primary\"\n",
    "                #self.labwidg.style.font_weight = \"50px\"\n",
    "            elif(self.buttonState == \"Stop\"):\n",
    "                self.labwidg.button_style=\"success\"\n",
    "                #self.labwidg.style.font_weight = \"50px\"\n",
    "            elif(self.buttonState == \"Reset\"):\n",
    "                self.labwidg.button_style=\"warning\"\n",
    "                #self.labwidg.style.font_weight = \"50px\"\n",
    "            if(self.stopTimer):\n",
    "                self.stopTimer = False\n",
    "                self.thread = None\n",
    "                break\n",
    "            if i%60 == 0:\n",
    "                if i%3600 == 0:\n",
    "                    secs = 0\n",
    "                    mins = 0\n",
    "                    hours += 1\n",
    "                else:\n",
    "                    secs = 0\n",
    "                    mins += 1\n",
    "            else:\n",
    "                secs += 1\n",
    "            time.sleep(.0167)\n",
    "            self.labwidg.description = '{hour:02}:{minute:02}:{second:02}'.\\\n",
    "                            format(hour=hours,minute=mins,second=secs)\n",
    "    #def twrap(self,b,limit=180):\n",
    "    #    self.timeit(limit=limit)\n",
    "    def threadTimer(self,b):\n",
    "        #b.description = self.buttonState\n",
    "        if(self.buttonState == \"Start\"):\n",
    "            if(self.thread == None):\n",
    "                self.thread = threading.Thread(target=self.timeit,args=(self.limit,))\n",
    "                self.thread.start()\n",
    "                self.buttonState = \"Stop\"\n",
    "        elif(self.buttonState == \"Stop\"):\n",
    "            if(self.thread != None):\n",
    "                self.stopTimer=True\n",
    "                self.buttonState = \"Reset\"\n",
    "        else:\n",
    "            self.labwidg.description = '00:00:00'\n",
    "            self.Thread = None\n",
    "            self.stopTimer=False\n",
    "            self.buttonState = \"Start\"\n",
    "    def stopTime(self,b):\n",
    "        self.stopTimer=True\n",
    "\n",
    "#def startTimer(b,timer):\n",
    "    #, args=(,))\n",
    "def lay(width,height):\n",
    "    return widgets.Layout(width=str(width)+\"px\",height=str(height)+\"px\")\n",
    "def display_timer():\n",
    "    timer = Timer()\n",
    "    display(timer.labwidg)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "application/vnd.jupyter.widget-view+json": {
       "model_id": "488413e913ee4afca43c256cc51621d4",
       "version_major": 2,
       "version_minor": 0
      },
      "text/plain": [
       "Button(description='00:00:00', layout=Layout(height='50px', width='120px'), style=ButtonStyle())"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    }
   ],
   "source": [
    "display_timer()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
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