d3 中的条位置与轴不匹配

2 回答

• 0

  以下是如何计算放置 bars/texts 的中心点的方法

  酒吧和文字： xScale.bandwidth()/2 - barWidth/2

  **文本的附加偏移量使其在条形图中居中：**分配文本属性后，根据条形宽度和此特定文本宽度定位文本(i.e.x)。

  简而言之：barWidth/2 - textWidth/2为此，您可以使用getBBox方法。这是如何做：

  .attr('x', function (d) {
      return xScale(d.desc) + ((barWidth - barPadding)/2 - d3.select(this).node().getBBox().width/2);
  });
  

  将以上 2 个更改应用于您的图表，这里是您的小提琴(和内联片段)的一个分支

  var width = 216;
  var height = 200;
  var barPadding = 18;
  var barWidth = 58;
  var dataSize = d3.selectAll(dataset).size();
  var margin = { top: 10, right: 0, bottom: 58, left: 30 };
  var width_box_sizing_border_box = width + margin.left + margin.right;
  var height_box_sizing_border_box = height + margin.bottom + margin.top;
  //var start = (width - margin.left - margin.right - (dataSize * barWidth) + barPadding) / 2;
  
  var graph;
  var xScale;
  var yScale;
  var dataset;
  
  var xTicks = 6;
  var yTicks = 6;
  
  dataset = [{ desc: 'test1', val: 40 }, { desc: 'some dummy text here', val: 120 }];
  
  xScale = d3.scaleBand()
      .domain(dataset.map(function (d) {
          return d.desc;
      }))
      .range([margin.left, width-margin.right]);
  
  yScale = d3.scaleLinear()
      .range([height, 0])
      .domain([0, 350]);
  
  graph = d3.select("#graph")
      .append("svg")
      .attr("class", "bar-chart")
      .attr("width", width_box_sizing_border_box)
      .attr("height", height_box_sizing_border_box)
  
  graph.append("g")
      .attr("class", "x-scale")
      .attr("transform", "translate(0," + (height + margin.top) + ")")
      .call(d3.axisBottom(xScale).ticks(xTicks))
      .selectAll(".tick text")
      .call(wrap, xScale.bandwidth());
  
  graph.append("g")
      .attr("class", "y-scale")
      .attr("transform", "translate(" + margin.left + "," + margin.top + ")")
      .call(d3.axisLeft(yScale).ticks(yTicks).tickPadding(10));
  
  graph
      .append("g")
      .attr("transform", "translate(" + (xScale.bandwidth()/2 - (barWidth - barPadding)/2) + "," + margin.top + ")")
      .attr('class', 'graph-placeholder')
      .selectAll("rect")
      .data(dataset)
      .enter()
      .append("rect")
      .attr("class", "bar1")
      .attr("height", height)
      .attr("width", barWidth - barPadding)
      .attr('x', d => xScale(d.desc));
  
  graph
      .append("g")
      .attr("transform", "translate(" + (xScale.bandwidth()/2 - (barWidth - barPadding)/2) + "," + margin.top + ")")
      .attr('class', 'graph-main')
      .selectAll("bar1")
      .data(dataset)
      .enter()
      .append("rect")
      .attr("class", "bar2")
      .attr('x', d => xScale(d.desc))
      .attr("y", function (d) {
          return yScale(d.val);
      })
      .attr("height", function (d) {
          return height - yScale(d.val);
      })
      .attr("width", barWidth - barPadding);
  
  
  graph
      .append("g")
      .attr("transform", "translate(" + (xScale.bandwidth()/2 - (barWidth - barPadding)/2) + "," + margin.top + ")")
      .attr('class', 'bar-label')
      .selectAll("text")
      .data(dataset)
      .enter()
      .append("text")
      .text(d => d.val + '%')
      .attr("y", function (d) {
          return yScale(d.val) - 5;
      }).attr('x', function (d) {
      	return xScale(d.desc) + ((barWidth - barPadding)/2 - d3.select(this).node().getBBox().width/2);
      });
  
  function wrap(text, width) {
      text.each(function () {
          var text = d3.select(this),
              words = text.text().split(/\s+/).reverse(),
              word,
              line = [],
              lineNumber = 0,
              lineHeight = 1,
              y = text.attr("y"),
              dy = parseFloat(text.attr("dy")),
              tspan = text.text(null).append("tspan").attr("x", 0).attr("y", y).attr("dy", dy + "em");
          while (word = words.pop()) {
              line.push(word);
              tspan.text(line.join(" "));
              if (tspan.node().getComputedTextLength() > width) {
                  line.pop();
                  tspan.text(line.join(" "));
                  line = [word];
                  tspan = text.append("tspan").attr("x", 0).attr("y", y).attr("dy", ++lineNumber * lineHeight + dy + "em").text(word);
              }
          }
      });
  }
  

  .bar-chart {
    background-color: #ccc;
  }
  
  .bar2 {
    fill: steelblue;
  }
  
  .bar1 {
    fill: #f2f2f2;
  }
  
  text {
    font-size: 12px;
    text-anchor: middle;
  }
  
  .bar-label text {
    text-anchor: start;
  }
  path.domain {
    stroke-width: 0;
    display: none;
  }
  

  <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/5.7.0/d3.min.js"></script>
  <div class="container">
    <div id="graph"></div>
  </div>
  

  小提琴链接：http://jsfiddle.net/xsuL8q4j/

  希望这可以帮助。

  回复于 2024-04-20T09:04:55+08:00
• 0

  更新

  您需要根据需要更改翻译，请参阅演示

  var width = 216;
  var height = 200;
  var barPadding = 18;
  var barWidth = 58;
  var dataSize = d3.selectAll(dataset).size();
  var margin = { top: 10, right: 0, bottom: 58, left: 30 };
  var width_box_sizing_border_box = width + margin.left + margin.right;
  var height_box_sizing_border_box = height + margin.bottom + margin.top;
  //var start = (width - margin.left - margin.right - (dataSize * barWidth) + barPadding) / 2;
  
  var graph;
  var xScale;
  var yScale;
  var dataset;
  
  var xTicks = 6;
  var yTicks = 6;
  
  dataset = [{ desc: 'test1', val: 40 }, { desc: 'some dummy text here', val: 120 }];
  
  xScale = d3.scaleBand()
      .domain(dataset.map(function (d) {
          return d.desc;
      }))
      .range([margin.left, width-margin.right]);
  
  yScale = d3.scaleLinear()
      .range([height, 0])
      .domain([0, 350]);
  
  graph = d3.select("#graph")
      .append("svg")
      .attr("class", "bar-chart")
      .attr("width", width_box_sizing_border_box)
      .attr("height", height_box_sizing_border_box)
  
  graph.append("g")
      .attr("class", "x-scale")
      // changed translate here as per your need
      .attr("transform", "translate(0," + (height + margin.top) + ")") 
      .call(d3.axisBottom(xScale).ticks(xTicks))
      .selectAll(".tick text")
      .call(wrap, xScale.bandwidth());
  
  graph.append("g")
      .attr("class", "y-scale")
      .attr("transform", "translate(" + margin.left + "," + margin.top + ")")
      .call(d3.axisLeft(yScale).ticks(yTicks).tickPadding(10));
  
  graph
      .append("g")
      .attr("transform", "translate(30," + margin.top + ")")
      .attr('class', 'graph-placeholder')
      .selectAll("rect")
      .data(dataset)
      .enter()
      .append("rect")
      .attr("class", "bar1")
      .attr("height", height)
      .attr("width", barWidth - barPadding)
      .attr('x', d => xScale(d.desc));
  
  graph
      .append("g")
      .attr("transform", "translate(30," + margin.top + ")")
      .attr('class', 'graph-main')
      .selectAll("bar1")
      .data(dataset)
      .enter()
      .append("rect")
      .attr("class", "bar2")
      .attr('x', d => xScale(d.desc))
      .attr("y", function (d) {
          return yScale(d.val);
      })
      .attr("height", function (d) {
          return height - yScale(d.val);
      })
      .attr("width", barWidth - barPadding);
  
  
  graph
      .append("g")
      .attr("transform", "translate(35," + margin.top + ")")
      .attr('class', 'bar-label')
      .selectAll("text")
      .data(dataset)
      .enter()
      .append("text")
      .text(d => d.val + '%')
      .attr('x', d => xScale(d.desc))
      .attr("y", function (d) {
          return yScale(d.val) - 5;
      })
  
  function wrap(text, width) {
      text.each(function () {
          var text = d3.select(this),
              words = text.text().split(/\s+/).reverse(),
              word,
              line = [],
              lineNumber = 0,
              lineHeight = 1,
              y = text.attr("y"),
              dy = parseFloat(text.attr("dy")),
              tspan = text.text(null).append("tspan").attr("x", 0).attr("y", y).attr("dy", dy + "em");
          while (word = words.pop()) {
              line.push(word);
              tspan.text(line.join(" "));
              if (tspan.node().getComputedTextLength() > width) {
                  line.pop();
                  tspan.text(line.join(" "));
                  line = [word];
                  tspan = text.append("tspan").attr("x", 0).attr("y", y).attr("dy", ++lineNumber * lineHeight + dy + "em").text(word);
              }
          }
      });
  }
  

  .bar-chart {
    background-color: #ccc;
  }
  
  .bar2 {
    fill: steelblue;
  }
  
  .bar1 {
    fill: #f2f2f2;
  }
  
  text {
    font-size: 12px;
    text-anchor: middle;
  }
  
  .bar-label text {
    text-anchor: start;
  }
  path.domain {
    stroke-width: 0;
    display: none;
  }
  

  <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/5.7.0/d3.min.js"></script>
  <div class="container">
    <div id="graph"></div>
  </div>
  

  回复于 2024-04-20T09:04:55+08:00