{
 "cells": [
  {
   "cell_type": "markdown",
   "id": "7fa76ef4-bde5-4ff8-8834-3567a1571565",
   "metadata": {},
   "source": [
    "# Customizing Tick Marks in Colorbars\n",
    "\n",
    "Two new parameters in the `theme()` function, `legend_ticks` and `legend_ticks_length`, provide fine-grained control over colorbar tick marks."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "id": "b9168017-8aad-42fa-acb6-88ec16e0dad4",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/html": [
       "\n",
       "            <div id=\"bsMXTj\"></div>\n",
       "            <script type=\"text/javascript\" data-lets-plot-script=\"library\">\n",
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       "                    window.letsPlotCallQueue = [];\n",
       "                }; \n",
       "                window.letsPlotCall = function(f) {\n",
       "                    window.letsPlotCallQueue.push(f);\n",
       "                };\n",
       "                (function() {\n",
       "                    var script = document.createElement(\"script\");\n",
       "                    script.type = \"text/javascript\";\n",
       "                    script.src = \"https://cdn.jsdelivr.net/gh/JetBrains/lets-plot@v4.6.0rc1/js-package/distr/lets-plot.min.js\";\n",
       "                    script.onload = function() {\n",
       "                        window.letsPlotCall = function(f) {f();};\n",
       "                        window.letsPlotCallQueue.forEach(function(f) {f();});\n",
       "                        window.letsPlotCallQueue = [];\n",
       "                        \n",
       "                    };\n",
       "                    script.onerror = function(event) {\n",
       "                        window.letsPlotCall = function(f) {};    // noop\n",
       "                        window.letsPlotCallQueue = [];\n",
       "                        var div = document.createElement(\"div\");\n",
       "                        div.style.color = 'darkred';\n",
       "                        div.textContent = 'Error loading Lets-Plot JS';\n",
       "                        document.getElementById(\"bsMXTj\").appendChild(div);\n",
       "                    };\n",
       "                    var e = document.getElementById(\"bsMXTj\");\n",
       "                    e.appendChild(script);\n",
       "                })()\n",
       "            </script>\n",
       "            "
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    }
   ],
   "source": [
    "from lets_plot import *\n",
    "LetsPlot.setup_html()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "74cdfb7a-0b1c-4c00-95a0-8282fcae2210",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/html": [
       "   <div id=\"FptBH4\"></div>\n",
       "   <script type=\"text/javascript\" data-lets-plot-script=\"plot\">\n",
       "   \n",
       "   (function() {\n",
       "   // ----------\n",
       "   \n",
       "   const forceImmediateRender = false;\n",
       "   const responsive = false;\n",
       "   \n",
       "   let sizing = {\n",
       "       width_mode: \"MIN\",\n",
       "       height_mode: \"SCALED\",\n",
       "       width: null, \n",
       "       height: null \n",
       "   };\n",
       "   \n",
       "   const preferredWidth = document.body.dataset.letsPlotPreferredWidth;\n",
       "   if (preferredWidth !== undefined) {\n",
       "       sizing = {\n",
       "           width_mode: 'FIXED',\n",
       "           height_mode: 'SCALED',\n",
       "           width: parseFloat(preferredWidth)\n",
       "       };\n",
       "   }\n",
       "   \n",
       "   const containerDiv = document.getElementById(\"FptBH4\");\n",
       "   let fig = null;\n",
       "   \n",
       "   function renderPlot() {\n",
       "       if (fig === null) {\n",
       "           const plotSpec = {\n",
       "\"data\":{\n",
       "},\n",
       "\"mapping\":{\n",
       "},\n",
       "\"data_meta\":{\n",
       "\"series_annotations\":[{\n",
       "\"type\":\"str\",\n",
       "\"column\":\"time\"\n",
       "}]\n",
       "},\n",
       "\"theme\":{\n",
       "\"name\":\"classic\",\n",
       "\"line\":\"blank\",\n",
       "\"axis\":\"blank\"\n",
       "},\n",
       "\"ggsize\":{\n",
       "\"width\":400.0,\n",
       "\"height\":200.0\n",
       "},\n",
       "\"kind\":\"plot\",\n",
       "\"scales\":[{\n",
       "\"aesthetic\":\"fill\",\n",
       "\"scale_mapper_kind\":\"color_grey\"\n",
       "}],\n",
       "\"layers\":[{\n",
       "\"geom\":\"bar\",\n",
       "\"mapping\":{\n",
       "\"x\":\"time\",\n",
       "\"fill\":\"..count..\"\n",
       "},\n",
       "\"data_meta\":{\n",
       "},\n",
       "\"data\":{\n",
       "\"..count..\":[2.0,3.0],\n",
       "\"time\":[\"Lunch\",\"Dinner\"]\n",
       "}\n",
       "}],\n",
       "\"metainfo_list\":[],\n",
       "\"spec_id\":\"1\"\n",
       "};\n",
       "           window.letsPlotCall(function() { fig = LetsPlot.buildPlotFromProcessedSpecs(plotSpec, containerDiv, sizing); });\n",
       "       } else {\n",
       "           fig.updateView({});\n",
       "       }\n",
       "   }\n",
       "   \n",
       "   const renderImmediately = \n",
       "       forceImmediateRender || (\n",
       "           sizing.width_mode === 'FIXED' && \n",
       "           (sizing.height_mode === 'FIXED' || sizing.height_mode === 'SCALED')\n",
       "       );\n",
       "   \n",
       "   if (renderImmediately) {\n",
       "       renderPlot();\n",
       "   }\n",
       "   \n",
       "   if (!renderImmediately || responsive) {\n",
       "       // Set up observer for initial sizing or continuous monitoring\n",
       "       var observer = new ResizeObserver(function(entries) {\n",
       "           for (let entry of entries) {\n",
       "               if (entry.contentBoxSize && \n",
       "                   entry.contentBoxSize[0].inlineSize > 0) {\n",
       "                   if (!responsive && observer) {\n",
       "                       observer.disconnect();\n",
       "                       observer = null;\n",
       "                   }\n",
       "                   renderPlot();\n",
       "                   if (!responsive) {\n",
       "                       break;\n",
       "                   }\n",
       "               }\n",
       "           }\n",
       "       });\n",
       "       \n",
       "       observer.observe(containerDiv);\n",
       "   }\n",
       "   \n",
       "   // ----------\n",
       "   })();\n",
       "   \n",
       "   </script>"
      ],
      "text/plain": [
       "<lets_plot.plot.core.PlotSpec at 0x15c1d0160>"
      ]
     },
     "execution_count": 2,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "data = dict(time=['Lunch', 'Lunch', 'Dinner', 'Dinner', 'Dinner'])\n",
    "p = ggplot(data) + geom_bar(aes(x='time', fill='..count..')) + scale_fill_grey() + theme_void() + ggsize(400, 200)\n",
    "p"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "id": "b4f0eeb4-dab9-413e-8c0e-393f0cf0426a",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/html": [
       "   <div id=\"nENJPX\"></div>\n",
       "   <script type=\"text/javascript\" data-lets-plot-script=\"plot\">\n",
       "   \n",
       "   (function() {\n",
       "   // ----------\n",
       "   \n",
       "   const forceImmediateRender = false;\n",
       "   const responsive = false;\n",
       "   \n",
       "   let sizing = {\n",
       "       width_mode: \"MIN\",\n",
       "       height_mode: \"SCALED\",\n",
       "       width: null, \n",
       "       height: null \n",
       "   };\n",
       "   \n",
       "   const preferredWidth = document.body.dataset.letsPlotPreferredWidth;\n",
       "   if (preferredWidth !== undefined) {\n",
       "       sizing = {\n",
       "           width_mode: 'FIXED',\n",
       "           height_mode: 'SCALED',\n",
       "           width: parseFloat(preferredWidth)\n",
       "       };\n",
       "   }\n",
       "   \n",
       "   const containerDiv = document.getElementById(\"nENJPX\");\n",
       "   let fig = null;\n",
       "   \n",
       "   function renderPlot() {\n",
       "       if (fig === null) {\n",
       "           const plotSpec = {\n",
       "\"ggsize\":{\n",
       "\"width\":800.0,\n",
       "\"height\":200.0\n",
       "},\n",
       "\"kind\":\"subplots\",\n",
       "\"layout\":{\n",
       "\"ncol\":4.0,\n",
       "\"nrow\":1.0,\n",
       "\"name\":\"grid\"\n",
       "},\n",
       "\"figures\":[{\n",
       "\"data\":{\n",
       "},\n",
       "\"mapping\":{\n",
       "},\n",
       "\"data_meta\":{\n",
       "\"series_annotations\":[{\n",
       "\"type\":\"str\",\n",
       "\"column\":\"time\"\n",
       "}]\n",
       "},\n",
       "\"theme\":{\n",
       "\"name\":\"classic\",\n",
       "\"line\":\"blank\",\n",
       "\"axis\":\"blank\",\n",
       "\"legend_ticks_length\":10.0\n",
       "},\n",
       "\"ggsize\":{\n",
       "\"width\":400.0,\n",
       "\"height\":200.0\n",
       "},\n",
       "\"ggtitle\":{\n",
       "\"text\":\"Long Ticks\"\n",
       "},\n",
       "\"kind\":\"plot\",\n",
       "\"scales\":[{\n",
       "\"aesthetic\":\"fill\",\n",
       "\"scale_mapper_kind\":\"color_grey\"\n",
       "}],\n",
       "\"layers\":[{\n",
       "\"geom\":\"bar\",\n",
       "\"mapping\":{\n",
       "\"x\":\"time\",\n",
       "\"fill\":\"..count..\"\n",
       "},\n",
       "\"data_meta\":{\n",
       "},\n",
       "\"data\":{\n",
       "\"..count..\":[2.0,3.0],\n",
       "\"time\":[\"Lunch\",\"Dinner\"]\n",
       "}\n",
       "}],\n",
       "\"metainfo_list\":[],\n",
       "\"spec_id\":\"2\"\n",
       "},{\n",
       "\"data\":{\n",
       "},\n",
       "\"mapping\":{\n",
       "},\n",
       "\"data_meta\":{\n",
       "\"series_annotations\":[{\n",
       "\"type\":\"str\",\n",
       "\"column\":\"time\"\n",
       "}]\n",
       "},\n",
       "\"theme\":{\n",
       "\"name\":\"classic\",\n",
       "\"line\":\"blank\",\n",
       "\"axis\":\"blank\",\n",
       "\"legend_ticks\":{\n",
       "\"size\":4.0,\n",
       "\"blank\":false\n",
       "}\n",
       "},\n",
       "\"ggsize\":{\n",
       "\"width\":400.0,\n",
       "\"height\":200.0\n",
       "},\n",
       "\"ggtitle\":{\n",
       "\"text\":\"Thick Ticks\"\n",
       "},\n",
       "\"kind\":\"plot\",\n",
       "\"scales\":[{\n",
       "\"aesthetic\":\"fill\",\n",
       "\"scale_mapper_kind\":\"color_grey\"\n",
       "}],\n",
       "\"layers\":[{\n",
       "\"geom\":\"bar\",\n",
       "\"mapping\":{\n",
       "\"x\":\"time\",\n",
       "\"fill\":\"..count..\"\n",
       "},\n",
       "\"data_meta\":{\n",
       "},\n",
       "\"data\":{\n",
       "\"..count..\":[2.0,3.0],\n",
       "\"time\":[\"Lunch\",\"Dinner\"]\n",
       "}\n",
       "}],\n",
       "\"metainfo_list\":[],\n",
       "\"spec_id\":\"3\"\n",
       "},{\n",
       "\"data\":{\n",
       "},\n",
       "\"mapping\":{\n",
       "},\n",
       "\"data_meta\":{\n",
       "\"series_annotations\":[{\n",
       "\"type\":\"str\",\n",
       "\"column\":\"time\"\n",
       "}]\n",
       "},\n",
       "\"theme\":{\n",
       "\"name\":\"classic\",\n",
       "\"line\":\"blank\",\n",
       "\"axis\":\"blank\",\n",
       "\"legend_ticks\":{\n",
       "\"color\":\"red\",\n",
       "\"size\":4.0,\n",
       "\"blank\":false\n",
       "}\n",
       "},\n",
       "\"ggsize\":{\n",
       "\"width\":400.0,\n",
       "\"height\":200.0\n",
       "},\n",
       "\"ggtitle\":{\n",
       "\"text\":\"Thick Red Ticks\"\n",
       "},\n",
       "\"kind\":\"plot\",\n",
       "\"scales\":[{\n",
       "\"aesthetic\":\"fill\",\n",
       "\"scale_mapper_kind\":\"color_grey\"\n",
       "}],\n",
       "\"layers\":[{\n",
       "\"geom\":\"bar\",\n",
       "\"mapping\":{\n",
       "\"x\":\"time\",\n",
       "\"fill\":\"..count..\"\n",
       "},\n",
       "\"data_meta\":{\n",
       "},\n",
       "\"data\":{\n",
       "\"..count..\":[2.0,3.0],\n",
       "\"time\":[\"Lunch\",\"Dinner\"]\n",
       "}\n",
       "}],\n",
       "\"metainfo_list\":[],\n",
       "\"spec_id\":\"4\"\n",
       "},{\n",
       "\"data\":{\n",
       "},\n",
       "\"mapping\":{\n",
       "},\n",
       "\"data_meta\":{\n",
       "\"series_annotations\":[{\n",
       "\"type\":\"str\",\n",
       "\"column\":\"time\"\n",
       "}]\n",
       "},\n",
       "\"theme\":{\n",
       "\"name\":\"classic\",\n",
       "\"line\":\"blank\",\n",
       "\"axis\":\"blank\",\n",
       "\"legend_ticks\":\"blank\"\n",
       "},\n",
       "\"ggsize\":{\n",
       "\"width\":400.0,\n",
       "\"height\":200.0\n",
       "},\n",
       "\"ggtitle\":{\n",
       "\"text\":\"Hidden Ticks\"\n",
       "},\n",
       "\"kind\":\"plot\",\n",
       "\"scales\":[{\n",
       "\"aesthetic\":\"fill\",\n",
       "\"scale_mapper_kind\":\"color_grey\"\n",
       "}],\n",
       "\"layers\":[{\n",
       "\"geom\":\"bar\",\n",
       "\"mapping\":{\n",
       "\"x\":\"time\",\n",
       "\"fill\":\"..count..\"\n",
       "},\n",
       "\"data_meta\":{\n",
       "},\n",
       "\"data\":{\n",
       "\"..count..\":[2.0,3.0],\n",
       "\"time\":[\"Lunch\",\"Dinner\"]\n",
       "}\n",
       "}],\n",
       "\"metainfo_list\":[],\n",
       "\"spec_id\":\"5\"\n",
       "}]\n",
       "};\n",
       "           window.letsPlotCall(function() { fig = LetsPlot.buildPlotFromProcessedSpecs(plotSpec, containerDiv, sizing); });\n",
       "       } else {\n",
       "           fig.updateView({});\n",
       "       }\n",
       "   }\n",
       "   \n",
       "   const renderImmediately = \n",
       "       forceImmediateRender || (\n",
       "           sizing.width_mode === 'FIXED' && \n",
       "           (sizing.height_mode === 'FIXED' || sizing.height_mode === 'SCALED')\n",
       "       );\n",
       "   \n",
       "   if (renderImmediately) {\n",
       "       renderPlot();\n",
       "   }\n",
       "   \n",
       "   if (!renderImmediately || responsive) {\n",
       "       // Set up observer for initial sizing or continuous monitoring\n",
       "       var observer = new ResizeObserver(function(entries) {\n",
       "           for (let entry of entries) {\n",
       "               if (entry.contentBoxSize && \n",
       "                   entry.contentBoxSize[0].inlineSize > 0) {\n",
       "                   if (!responsive && observer) {\n",
       "                       observer.disconnect();\n",
       "                       observer = null;\n",
       "                   }\n",
       "                   renderPlot();\n",
       "                   if (!responsive) {\n",
       "                       break;\n",
       "                   }\n",
       "               }\n",
       "           }\n",
       "       });\n",
       "       \n",
       "       observer.observe(containerDiv);\n",
       "   }\n",
       "   \n",
       "   // ----------\n",
       "   })();\n",
       "   \n",
       "   </script>"
      ],
      "text/plain": [
       "<lets_plot.plot.subplots.SupPlotsSpec at 0x15d46f580>"
      ]
     },
     "execution_count": 3,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "long_ticks = theme(legend_ticks_length=10) + ggtitle(\"Long Ticks\")\n",
    "thick_ticks = theme(legend_ticks=element_line(size=4)) + ggtitle(\"Thick Ticks\")\n",
    "thick_red_ticks = theme(legend_ticks=element_line(size=4, color='red')) + ggtitle(\"Thick Red Ticks\")\n",
    "hidden_ticks = theme(legend_ticks='blank') + ggtitle(\"Hidden Ticks\")\n",
    "\n",
    "gggrid([\n",
    "    p + long_ticks,\n",
    "    p + thick_ticks,\n",
    "    p + thick_red_ticks,\n",
    "    p + hidden_ticks,\n",
    "]) + ggsize(800, 200)"
   ]
  }
 ],
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