d3js滾動可見性-條形圖的系列動畫

Question

我正在開發d3應用程序，並且我有興趣采用以下jsfiddle（並在加載或執行操作時）撤消條形圖逐一動畫的動畫。

因此，第一個條動畫化到其高度，然后第二個以此類推。 反轉動畫也很好-也許在滾動可見性時會自動調用某些內容嗎？

http://jsfiddle.net/pg886/201/

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://d3js.org/d3.v4.min.js"></script>

<div 
    class="barchart" 
    data-role="barchart" 
    data-width=300
    data-height=400 
    data-data="x"
    data-configurations=""
>
</div>

<style>
    .barchart{
        /*width:100%;
        border: 1px solid red;*/
    }

    .barchart svg{
        width:100%;
        /*border: 1px solid green;*/
    }

    .barchartg{

    }

    .barchart .axis path{
        fill: none;
        stroke: #000;
        shape-rendering: crispEdges;
    }

    .barchart .axis line {
        fill: none;
        stroke: none;
        shape-rendering: crispEdges;
    }

    .barchart .x.axis path {
        display: none;
    }

    .barchart .axis text{
        fill: #005a70;
    }

    .barchart.dark .axis text{
        fill: #ffffff;
    }
    .barchart.dark .axis path{  
        stroke: #ffffff;
    }

    .barchart .bar:hover {
        fill: #e9168a;
    }

</style>


<script>

    $(document).ready(function() {
        console.log("test")

        var $this = $(".barchart");

        var w = $this.data("width");
        var h = $this.data("height");
        var data = $this.data("data");

        var data = [{
            "label": "Apples",
            "value": 100
        },
        {
            "label": "Pears",
            "value": 120
        },
        {
            "label": "Bananas",
            "value": 20
        }];

        var configurations = $this.data("configurations");

        function colores_google(n) {
            var colores_g = ["#f7b363", "#448875", "#2b2d39", "#c12f39", "#f8dd2f", "#1b91dc"];
            return colores_g[n % colores_g.length];
        }

        //asess the margin bottom for the chart based on the max char label
        var charLabelCount = [];
        data.map(function(d) { 
            var labelStr =  d.label.toString();
            charLabelCount.push(labelStr.length); 
        })
        var maxChars = charLabelCount.reduce(function(a, b) {
            return Math.max(a, b);
        });

        var bottomMarg = 60;
        if(maxChars > 15){
            bottomMarg = 170;
        }
        //bottom margin calculation

        var margin = {top: 15, right: 20, bottom: bottomMarg, left: 40},
            width = w - margin.left - margin.right,
            height = h - margin.top - margin.bottom;

        var x = d3.scaleBand()
            .rangeRound([0, width]).padding(0.1);

        var y = d3.scaleLinear()
            .range([height, 0]);

        var xAxis = d3.axisBottom(x);
        var yAxis = d3.axisLeft(y);

        var svg = d3.select($this[0])
            .append("svg")
            .attr("width", w)
            .attr("height", h)
            .attr("viewBox", "0 0 "+w+" "+h)
            .attr("preserveAspectRatio", "xMidYMid meet")
          .append("g")
            .attr("transform", "translate(" + margin.left + "," + margin.top + ")")
            .attr("class", "barchartg");

        function sortBy(array,key){
            var sorted = array.sort(function(a, b) {
                return parseFloat(b[key]) - parseFloat(a[key]);
            });
            return sorted;
        }

        var sortedMax = 45;//45 as an initial value

        //if there is a configuration file - it acts as an overide -- this is so there could be just one chart -- or a set of charts next to each other
        if(configurations){
            //if its a comparison chart -- use a max value that will be shared amongst a stack of sibling charts
            if(configurations[0]["maxValue"]){
                sortedMax = configurations[0]["maxValue"] + 5;//add 5 value buffer
            }
        }
        else{
            //if its a stand alone chart - adjust the max val by this chart's own values
            sortedMax = sortBy(data, "value")[0]["value"] + 5;//add 5 value buffer
        }

        x.domain(data.map(function(d) { 
            return d.label; 
        }));

        y.domain([0, sortedMax]);

        svg.append("g")
          .attr("class", "x axis")
          .attr("transform", "translate(0," + height + ")")
          .call(xAxis);

        svg.selectAll(".x.axis text")  
                .attr("transform", "rotate(-60) translate(-5,-5)")
                .style("text-anchor", "end");

        svg.append("g")
          .attr("class", "y axis")
          .call(yAxis)
        .append("text")
          .attr("transform", "rotate(-90)")
          .attr("y", 6)
          .attr("dy", ".71em")
          .style("text-anchor", "end")
          .text("");

        svg.selectAll(".bar")
          .data(data)
        .enter().append("rect")
          .attr("class", "bar")           
          .attr("fill", function(d, i) { 
            return colores_google(i);
          })
          .attr("x", function(d) { 
            return x(d.label); 
          })
          .attr("width", x.bandwidth())
          .attr("y", function(d) { 
            return y(d.value); 
          })
          .attr("height", function(d) { 
            return height - y(d.value); 
          });
    });

</script>

Answer 1

使用.transition（）觸發每個矩形的動畫。

但是，您還必須以零高度和y零高度開始每個rect ，以便在動畫中可以使用一些東西。

 $(document).ready(function() { console.log("test") var $this = $(".barchart"); var w = $this.data("width"); var h = $this.data("height"); var data = $this.data("data"); var data = [{ "label": "Apples", "value": 100 }, { "label": "Pears", "value": 120 }, { "label": "Bananas", "value": 20 } ]; var configurations = $this.data("configurations"); function colores_google(n) { var colores_g = ["#f7b363", "#448875", "#2b2d39", "#c12f39", "#f8dd2f", "#1b91dc"]; return colores_g[n % colores_g.length]; } //asess the margin bottom for the chart based on the max char label var charLabelCount = []; data.map(function(d) { var labelStr = d.label.toString(); charLabelCount.push(labelStr.length); }) var maxChars = charLabelCount.reduce(function(a, b) { return Math.max(a, b); }); var bottomMarg = 60; if (maxChars > 15) { bottomMarg = 170; } //bottom margin calculation var margin = { top: 15, right: 20, bottom: bottomMarg, left: 40 }, width = w - margin.left - margin.right, height = h - margin.top - margin.bottom; var x = d3.scaleBand() .rangeRound([0, width]).padding(0.1); var y = d3.scaleLinear() .range([height, 0]); var xAxis = d3.axisBottom(x); var yAxis = d3.axisLeft(y); var svg = d3.select($this[0]) .append("svg") .attr("width", w) .attr("height", h) .attr("viewBox", "0 0 " + w + " " + h) .attr("preserveAspectRatio", "xMidYMid meet") .append("g") .attr("transform", "translate(" + margin.left + "," + margin.top + ")") .attr("class", "barchartg"); function sortBy(array, key) { var sorted = array.sort(function(a, b) { return parseFloat(b[key]) - parseFloat(a[key]); }); return sorted; } var sortedMax = 45; if (configurations) { if (configurations[0]["maxValue"]) { sortedMax = configurations[0]["maxValue"] + 5; } } else { sortedMax = sortBy(data, "value")[0]["value"] + 5; } x.domain(data.map(function(d) { return d.label; })); y.domain([0, sortedMax]); svg.append("g") .attr("class", "x axis") .attr("transform", "translate(0," + height + ")") .call(xAxis); svg.selectAll(".x.axis text") .attr("transform", "rotate(-60) translate(-5,-5)") .style("text-anchor", "end"); svg.append("g") .attr("class", "y axis") .call(yAxis) .append("text") .attr("transform", "rotate(-90)") .attr("y", 6) .attr("dy", ".71em") .style("text-anchor", "end") .text(""); svg.selectAll(".bar") .data(data) .enter().append("rect") .attr("class", "bar") .attr("fill", function(d, i) { return colores_google(i); }) .attr("x", function(d) { return x(d.label); }) .attr("width", x.bandwidth()) .attr("y", function(d) { return y(0); }) .attr("height", function(d) { return 0 }); d3.selectAll("rect").transition() .duration(500) .delay(function(d,i){ return 500*i;}) .attr("height",function(d){ return height - y(d.value);}) .attr("y",function(d){return y(d.value);}); setTimeout(function(){ d3.selectAll("rect").transition() .duration(500) .delay(function(d,i){ return 600*(3-i);}) .attr("height",function(d){ return 0;}) .attr("y",function(d){return y(0);}); },2000); }); 

 .barchart { /*width:100%; border: 1px solid red;*/ } .barchart svg { width: 100%; /*border: 1px solid green;*/ } .barchartg {} .barchart .axis path { fill: none; stroke: #000; shape-rendering: crispEdges; } .barchart .axis line { fill: none; stroke: none; shape-rendering: crispEdges; } .barchart .x.axis path { display: none; } .barchart .axis text { fill: #005a70; } .barchart.dark .axis text { fill: #ffffff; } .barchart.dark .axis path { stroke: #ffffff; } .barchart .bar:hover { fill: #e9168a; } 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <script src="https://d3js.org/d3.v4.min.js"></script> <div class="barchart" data-role="barchart" data-width=300 data-height=400 data-data="x" data-configurations=""> </div> 

Answer 2

您需要根據需要添加每個小節的過渡，並根據您的意願延遲過渡。代碼如下。

.transition()
  .delay(function (d,i){ return i * 300;})        
  .duration(250)

帶有代碼塊的更新代碼如下

svg.selectAll(".bar")
      .data(data)
    .enter().append("rect")
      .attr("class", "bar") 
  .transition()
  .delay(function (d,i){ return i * 300;})        
  .duration(250)
      .attr("fill", function(d, i) { 
        return colores_google(i);
      })
      .attr("x", function(d) { 
        return x(d.label); 
      })
      .attr("width", x.bandwidth())
      .attr("y", function(d) { 
        return y(d.value); 
      })
      .attr("height", function(d) { 
        return height - y(d.value); 
      })