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   "source": [
    "# On click callback\n",
    "\n",
    "Once all cells are executed, click anywhere to get the closest star name. Be patient and the associated photometric points appear after a few seconds."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "from ipyaladin import Aladin\n",
    "import requests\n",
    "from ipywidgets import Layout, Box, widgets\n",
    "\n",
    "aladin = Aladin(layout=Layout(width=\"70%\"), target=\"M 36\", fov=0.3)\n",
    "info = widgets.HTML()\n",
    "\n",
    "\n",
    "box_layout = Layout(\n",
    "    display=\"flex\", flex_flow=\"row\", align_items=\"stretch\", width=\"100%\"\n",
    ")\n",
    "box = Box(children=[aladin, info], layout=box_layout)\n",
    "box"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "def process_result(data: dict) -> None:\n",
    "    \"\"\"Process the result of a click event on the Aladin widget.\n",
    "\n",
    "    Parameters\n",
    "    ----------\n",
    "    data : dict\n",
    "        The data returned by the click event.\n",
    "    \"\"\"\n",
    "    info.value = \"\"\n",
    "    ra = data[\"ra\"]\n",
    "    dec = data[\"dec\"]\n",
    "    query = \"\"\"SELECT TOP 1 main_id, ra, dec, DISTANCE(POINT('ICRS', %f, %f),\n",
    "               POINT('ICRS', ra, dec)) as d FROM basic\n",
    "               WHERE CONTAINS(POINT('ICRS', ra, dec), CIRCLE('ICRS', %f, %f, %f))=1\n",
    "               ORDER BY d ASC\"\"\" % (\n",
    "        ra,\n",
    "        dec,\n",
    "        ra,\n",
    "        dec,\n",
    "        aladin.fov.deg / 10,\n",
    "    )\n",
    "\n",
    "    r = requests.get(\n",
    "        \"http://simbad.u-strasbg.fr/simbad/sim-tap/sync\",\n",
    "        params={\n",
    "            \"query\": query,\n",
    "            \"request\": \"doQuery\",\n",
    "            \"lang\": \"adql\",\n",
    "            \"format\": \"json\",\n",
    "            \"phase\": \"run\",\n",
    "        },\n",
    "    )\n",
    "    obj_name = \"\"\n",
    "    obj_coo = None\n",
    "    obj_data = r.json()[\"data\"]\n",
    "    if len(obj_data) == 0:\n",
    "        return\n",
    "\n",
    "    obj_name = obj_data[0][0]\n",
    "    obj_coo = [obj_data[0][1], obj_data[0][2]]\n",
    "\n",
    "    sed_img = (\n",
    "        '<img src=\"http://cdsportal.u-strasbg.fr/cgi-bin/PhotVizPreview/plot?ra=%f&dec=%f&radius_arcsec=5&w=200&h=150&point_size=4\">'\n",
    "        % (obj_coo[0], obj_coo[1])\n",
    "    )\n",
    "    info.value = \"<h2>%s</h2><br><br>%s\" % (obj_name, sed_img)\n",
    "\n",
    "\n",
    "aladin.set_listener(\"click\", process_result)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
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