29:null 2a:["$","title",null,{"children":"Property Crime Rates by State, 1985- 2020 | cyrusobrien | Observable"}] 2f:Td32,addTooltips = (chart, hover_styles = { fill: "blue", opacity: 0.5 }) => { let styles = hover_styles; const line_styles = { stroke: "blue", "stroke-width": 4 }; // Workaround if it's in a figure const type = d3.select(chart).node().tagName; const wrapper = type === "FIGURE" ? d3.select(chart).select("svg") : d3.select(chart); wrapper.style("overflow", "visible"); // to avoid clipping at the edges // Set pointer events to visibleStroke if the fill is none (e.g., if its a line) wrapper.selectAll("path").each(function (data, index, nodes) { // For line charts, set the pointer events to be visible stroke if ( d3.select(this).attr("fill") === null || d3.select(this).attr("fill") === "none" ) { d3.select(this).style("pointer-events", "visibleStroke"); styles = _.isEqual(hover_styles, { fill: "blue", opacity: 0.5 }) ? line_styles : hover_styles; } }); const tip = wrapper .selectAll(".hover-tip") .data([""]) .join("g") .attr("class", "hover") .style("pointer-events", "none") .style("text-anchor", "middle"); // Add a unique id to the chart for styling const id = id_generator(); // Add the event listeners d3.select(chart) .classed(id, true) // using a class selector so that it doesn't overwrite the ID .selectAll("title") .each(function () { // Get the text out of the title, set it as an attribute on the parent, and remove it const title = d3.select(this); // title element that we want to remove const parent = d3.select(this.parentNode); // visual mark on the screen const t = title.text(); if (t) { parent.attr("__title", t).classed("has-title", true); title.remove(); } // Mouse events parent .on("mousemove", function (event) { const text = d3.select(this).attr("__title"); const pointer = d3.pointer(event, wrapper.node()); if (text) tip.call(hover, pointer, text.split("\n")); else tip.selectAll("*").remove(); // Raise it // d3.select(this).raise(); // Keep within the parent horizontally const tipSize = tip.node().getBBox(); if (pointer[0] + tipSize.x < 0) tip.attr( "transform", `translate(${tipSize.width / 2}, ${pointer[1] + 7})` ); else if (pointer[0] + tipSize.width / 2 > wrapper.attr("width")) tip.attr( "transform", `translate(${wrapper.attr("width") - 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(text.length - 1)) * 15 - vertical_offset)\n .style(\"font-weight\", (d, i) => (i === 0 ? \"bold\" : \"normal\"));\n\n const bbox = tip.node().getBBox();\n\n // Add a rectangle (as background)\n tip\n .append(\"rect\")\n .attr(\"y\", bbox.y - vertical_padding)\n .attr(\"x\", bbox.x - side_padding)\n .attr(\"width\", bbox.width + side_padding * 2)\n .attr(\"height\", bbox.height + vertical_padding * 2)\n .style(\"fill\", \"white\")\n .style(\"stroke\", \"#d3d3d3\")\n .lower();\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":51,"value":"// To generate a unique ID for each chart so that they styles only apply to that chart\nid_generator = () => {\n var S4 = function () {\n return (((1 + Math.random()) * 0x10000) | 0).toString(16).substring(1);\n };\n return \"a\" + S4() + S4();\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":255,"value":"function highlight(d) {\n return /California/.test(d.state);\n}","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":292,"value":"","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":272,"value":"$30","pinned":false,"hidden":false,"mode":"html","author":"$undefined","summary":"$undefined","output":"","database":"$undefined"}],"files":"$W31","stdlib":"1","titling":"auto"}} 2e:"$2d:body"