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<!DOCTYPE html> |
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<meta charset="utf-8"> |
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<style> |
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text { |
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font: bold 32px monospace; |
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} |
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.set text { |
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font: 18px monospace; |
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} |
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.enter { |
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fill: green; |
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} |
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.update { |
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fill: #333; |
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} |
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.exit { |
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fill: brown; |
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} |
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input { |
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width: 280px; |
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font-size: 18pt; |
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} |
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.controlPanel { |
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float:left; |
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} |
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button { |
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font-size: 18pt; |
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} |
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</style> |
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<div class="controlPanel"> |
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<h2>Enter your own data</h2> |
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<input id="data" type="text"> |
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<br> |
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<button id="btnUpdate">Update</button> |
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<button id="btnRandom">Random</button> |
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<h3>Previous data:</h3> |
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<div id="previous"></div> |
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</div> |
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<svg width="580" height="500"></svg> |
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<script src="https://d3js.org/d3.v4.min.js"></script> |
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<script> |
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var alphabet = "abcdefghijklmnopqrstuvwxyz".split(""); |
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var svg = d3.select("svg"), |
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width = +svg.attr("width"), |
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height = +svg.attr("height"), |
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g = svg.append("g").attr("transform", "translate(32," + (height / 4) + ")"), |
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gGroups = svg.append("g").attr("transform", "translate(32," + (height / 4 * 3) + ")") |
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; |
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function update(data) { |
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var t = d3.transition() |
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.duration(750); |
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// JOIN new data with old elements. |
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var text = g.selectAll("text") |
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.data(data, function(d) { return d; }); |
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// EXIT old elements not present in new data. |
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text.exit() |
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.attr("class", "exit") |
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.transition(t) |
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.attr("y", 60) |
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.style("fill-opacity", 1e-6) |
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.remove(); |
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// UPDATE old elements present in new data. |
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text.attr("class", "update") |
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.attr("y", 0) |
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.style("fill-opacity", 1) |
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.transition(t) |
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.attr("x", function(d, i) { return i * 18; }); |
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// ENTER new elements present in new data. |
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text.enter().append("text") |
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.attr("class", "enter") |
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.attr("dy", ".35em") |
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.attr("y", -60) |
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.attr("x", function(d, i) { return i * 18; }) |
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.style("fill-opacity", 1e-6) |
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.text(function(d) { return d; }) |
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.transition(t) |
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.attr("y", 0) |
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.style("fill-opacity", 1); |
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updateSets(data, text); |
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} |
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// Visualize the enter, update and exit sets of the passed selection |
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function updateSets(data, sel) { |
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var getData = function(sel) { |
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return sel.nodes().map(function (d) { return d.__data__; }); |
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}; |
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var set = gGroups.selectAll(".set") |
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.data([getData(sel.enter()), //enter set (created) |
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getData(sel), //update set |
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getData(sel.exit()) //exit set (removed) |
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]); |
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var setEnter = set.enter() |
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.append("g") |
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.attr("class", "set"); |
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setEnter |
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.append("text") |
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.attr("class", "setTitle") |
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.attr("x", width/6) |
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.text(function (_,i) { |
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return i===0 ? "Enter": |
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i===1 ? "Update": |
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"Exit"; |
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}); |
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setEnter |
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.merge(set) |
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.classed("enter", function (_,i) { return i===0; }) |
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.classed("update", function (_,i) { return i===1; }) |
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.classed("exit", function (_,i) { return i===2; }) |
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.attr("transform", function (_, i) { |
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return "translate(" + ( i*width/3 ) + ",0)"; |
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}); |
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set.exit().remove(); |
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var text = setEnter |
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.merge(set) |
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.selectAll(".letter") |
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.data(function (d) { return d; }); |
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text.enter() |
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.append("text") |
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.attr("class", "letter") |
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.merge(text) |
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.attr("y", 32) |
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.attr("x", function (d,i) { return i*9; }) |
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.text(function (d) { |
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return d; |
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}); |
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text.exit().remove(); |
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d3.select("#data") |
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.property("value", data.join(",")); |
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d3.select("#previous") |
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.insert("p", ":first-child") |
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.text(data.join(",")); |
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} |
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// The initial display. |
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update(alphabet); |
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d3.select("#btnRandom") |
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.on("click", function () { |
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update(d3.shuffle(alphabet) |
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.slice(0, Math.floor(Math.random() * 26)) |
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.sort()); |
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}); |
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d3.select("#btnUpdate") |
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.on("click", function () { |
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var data; |
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try { |
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data = d3.select("#data").property("value").split(",").map(d=> d.trim()); |
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} catch (Exception) { |
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alert("Please enter a comma separated list"); |
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} |
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update(data); |
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}); |
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</script> |
