{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "import param\n",
    "import panel as pn\n",
    "\n",
    "pn.extension(sizing_mode=\"stretch_width\")"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## param.Action Example\n",
    "\n",
    "This example demonstrates how to use ``param.Action`` to trigger an update in a method that depends on that parameter. Actions can trigger any function, but if we simply want to trigger a method that depends on that action, then we can define a small ``lambda`` function that triggers the parameter explicitly."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "class ActionExample(param.Parameterized):\n",
    "    \"\"\"\n",
    "    Demonstrates how to use param.Action to trigger an update.\n",
    "    \"\"\"\n",
    "\n",
    "    action = param.Action(lambda x: x.param.trigger('action'), label='Click here!')\n",
    "    \n",
    "    number = param.Integer(default=0)\n",
    "        \n",
    "    @param.depends('action')\n",
    "    def get_number(self):\n",
    "        self.number += 1\n",
    "        return self.number\n",
    "    \n",
    "action_example = ActionExample()\n",
    "component = pn.Column(\n",
    "    pn.Row(\n",
    "        pn.Column(pn.panel(action_example, show_name=False, margin=0, widgets={\"action\": {\"button_type\": \"primary\"}, \"number\": {\"disabled\": True}}),\n",
    "            '**Click the button** to trigger an update in the output.'),\n",
    "        pn.panel(action_example.get_number, width=300), max_width=600)\n",
    ")\n",
    "component"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## App\n",
    "\n",
    "Lets wrap it into nice template that can be served via `panel serve action_button.ipynb`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "pn.template.FastListTemplate(\n",
    "    site=\"Panel\", title=\"param.Action Example\", \n",
    "    main=[\n",
    "        \"This example demonstrates **how to use ``param.Action`` to trigger an update** in a method that depends on that parameter.\\n\\nActions can trigger any function, but if we simply want to trigger a method that depends on that action, then we can define a small ``lambda`` function that triggers the parameter explicitly.\",\n",
    "        component,\n",
    "    ]\n",
    ").servable();"
   ]
  }
 ],
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  "language_info": {
   "name": "python",
   "pygments_lexer": "ipython3"
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 "nbformat_minor": 4
}