{
 "cells": [
  {
   "cell_type": "markdown",
   "id": "0",
   "metadata": {},
   "source": [
    "# Widget"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "1",
   "metadata": {},
   "outputs": [],
   "source": [
    "import ipywidgets as ipw\n",
    "from IPython.display import SVG\n",
    "\n",
    "from pyabc2.abcjs.widget import ABCJSWidget, interactive"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "2",
   "metadata": {},
   "source": [
    "## The display widget\n",
    "\n",
    "Used to {ref}`display <tune_type>` {class}`~pyabc2.Tune`s in the notebook environment.\n",
    "{class}`~pyabc2.abcjs.widget.ABCJSWidget` supports many of the [abcjs render options](https://docs.abcjs.net/visual/render-abc-options.html)."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "3",
   "metadata": {},
   "outputs": [],
   "source": [
    "# Nothing (or logo if abcjs hasn't been loaded yet)\n",
    "ABCJSWidget()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "4",
   "metadata": {},
   "outputs": [],
   "source": [
    "# Nothing\n",
    "ABCJSWidget()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "5",
   "metadata": {},
   "outputs": [],
   "source": [
    "# Really nothing\n",
    "ABCJSWidget(hide=True)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "6",
   "metadata": {},
   "outputs": [],
   "source": [
    "# Just logo\n",
    "ABCJSWidget(logo=True)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "7",
   "metadata": {},
   "outputs": [],
   "source": [
    "# Logo and a bit of music\n",
    "ABCJSWidget(abc=\"DEFG E2 CD- | D8 ||\", logo=True)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "8",
   "metadata": {},
   "outputs": [],
   "source": [
    "# Slightly more complicated example\n",
    "ABCJSWidget(abc=\"K:G\\n\" + \" G,A,B,C DEFG | \" * 4, staff_width=500, foreground=\"teal\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "9",
   "metadata": {},
   "outputs": [],
   "source": [
    "# Adding ABC and modifying parameters after init\n",
    "w = ABCJSWidget()\n",
    "w.abc = \"\"\"\\\n",
    "K: G\n",
    "G,A,B,C DEFG | ABcd efga | bc'd'e' f'g'a'b' |\n",
    "\"\"\"\n",
    "w.scale = 0.8\n",
    "w.staff_width = 550\n",
    "display(w)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "10",
   "metadata": {},
   "outputs": [],
   "source": [
    "# Dynamic update\n",
    "# Note both display instances are modified!\n",
    "w.abc += \"| c'\"\n",
    "w"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "11",
   "metadata": {},
   "source": [
    "## Save the SVG from the display widget\n",
    "\n",
    "It doesn't seem to be possible to do this with a single cell,\n",
    "but with two cells we can get to the SVGs\n",
    "(based on experiments in JupyterLab)."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "12",
   "metadata": {},
   "outputs": [],
   "source": [
    "w = ABCJSWidget(hide=True)\n",
    "w.abc = \"\"\"\\\n",
    "K: G\n",
    "G,A,B,C DEFG | ABcd efga | bc'd'e' f'g'a'\n",
    "\"\"\"\n",
    "display(w)\n",
    "print(w.svgs)  # NOTE: Empty at this point"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "13",
   "metadata": {},
   "outputs": [],
   "source": [
    "# NOTE: must run this cell again for `.svgs` to be populated if using restart and run (to selected cell or full)\n",
    "print(len(w.svgs), \"SVG(s)\")\n",
    "for i, s in enumerate(w.svgs):\n",
    "    display(SVG(s))"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "14",
   "metadata": {},
   "source": [
    "## Editor\n",
    "\n",
    "```{note}\n",
    "The docs version doesn't currently provide full interactivity\n",
    "(a running Python kernel is needed, e.g. JupyterLab).\n",
    "```"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "15",
   "metadata": {},
   "outputs": [],
   "source": [
    "interactive()"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "16",
   "metadata": {},
   "source": [
    "## Editor example\n",
    "\n",
    "With a single widget instance, both display instances _should_ update when you change something.\n",
    "\n",
    "Here, we initialize the widget with some ABC and a few non-default settings."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "17",
   "metadata": {},
   "outputs": [],
   "source": [
    "abc = \"K: C\\nM: 4/4\\nT: The best scale\\n\" + '\"C\"' + \"CDEF GABc | \" * 4\n",
    "\n",
    "w = interactive(abc, foreground=\"#808080\", staff_width=600)\n",
    "w"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "18",
   "metadata": {},
   "outputs": [],
   "source": [
    "w"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "19",
   "metadata": {},
   "source": [
    "### Compare to ipywidgets behavior"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "20",
   "metadata": {},
   "outputs": [],
   "source": [
    "slider = ipw.FloatSlider(min=200, max=500, value=400)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "21",
   "metadata": {},
   "outputs": [],
   "source": [
    "slider"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "22",
   "metadata": {},
   "outputs": [],
   "source": [
    "# We can do this and all display instances change and the slider still shows for this cell\n",
    "slider.value += 1\n",
    "slider"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "23",
   "metadata": {},
   "source": [
    "## Headless\n",
    "\n",
    "We can also use abcjs in the background via Node.js using {mod}`pyabc2.abcjs.headless`."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "24",
   "metadata": {},
   "outputs": [],
   "source": [
    "from IPython.display import SVG, Image\n",
    "\n",
    "from pyabc2.abcjs.headless import svg, svg_to"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "25",
   "metadata": {},
   "outputs": [],
   "source": [
    "s = svg(\"CDEF GABc |\")\n",
    "print(s[:100], \"...\")\n",
    "SVG(s)"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "26",
   "metadata": {},
   "source": [
    "{func}`~pyabc2.abcjs.headless.build` is automatically called if needed.\n",
    "The next time we call {func}`~pyabc2.abcjs.headless.svg`, it should be faster."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "27",
   "metadata": {},
   "outputs": [],
   "source": [
    "SVG(svg(\"A2 B2 C2 D2 |\"))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "28",
   "metadata": {},
   "outputs": [],
   "source": [
    "try:\n",
    "    display(Image(data=svg_to(s, \"png\")))\n",
    "except RuntimeError:\n",
    "    print(\"failed to load cairo\")"
   ]
  }
 ],
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