D3刻度与背景

时间:2017-02-19 12:27:35

标签: d3.js

D3轴tick如何具有背景颜色?

这样做的一种野蛮方式是在每个rect中添加g.tick元素并在其上加fill,但由于{{1} rect,因此很难实现}必须与tick ..

中的文本大小相同

以下是Mike Bostock的basic ticks example(和another的图表)

我拍了一张截图并标记了(红色边框)我希望刻度线有背景颜色:

enter image description here

有没有人知道在Ticks上有任何理智的背景色? 感谢

3 个答案:

答案 0 :(得分:5)

另一种选择是制作这样的过滤器:

one

并勾选添加过滤器:

  var filter = svg.append("defs").append("filter")
    .attr("x", "0")
    .attr("y", "0")
    .attr("width", "1")
    .attr("height", "1")
    .attr("id", "background")//id of the filter
  filter.append("feFlood")
    .attr("flood-color", "red");
  filter.append("feComposite")
    .attr("in", "SourceGraphic");

工作代码here

答案 1 :(得分:3)

我不会这么快就放弃你的rect想法。它实现起来非常简单,允许您根据需要调整“背景”的大小。以下是3个额外像素的外观:

d3.selectAll(".tick").each(function(d,i){
  var tick = d3.select(this),
      text = tick.select('text'),
      bBox = text.node().getBBox();

  tick.insert('rect', ':first-child')
    .attr('x', bBox.x - 3)
    .attr('y', bBox.y - 3)
    .attr('height', bBox.height + 6)
    .attr('width', bBox.width + 6)
    .style('fill', d3.schemeCategory20[i % 20]);      
});

完整示例:

<!DOCTYPE html>
<meta charset="utf-8">
<svg width="960" height="500"></svg>
<script src="//d3js.org/d3.v4.min.js"></script>
<script>

var svg = d3.select("svg"),
    margin = {top: 20, right: 0, bottom: 20, left: 0},
    width = svg.attr("width") - margin.left - margin.right,
    height = svg.attr("height") - margin.top - margin.bottom,
    g = svg.append("g").attr("transform", "translate(" + margin.left + "," + margin.top + ")");

var x = d3.scalePoint()
    .domain([0, 1, 2])
    .range([0, width])
    .padding(1);

var y = d3.scaleLinear()
    .domain([-1e6, 2e6])
    .range([height, 0]);

g.append("g")
    .attr("transform", "translate(" + x(0) + ",0)")
    .attr("class", "axis")
    .call(d3.axisLeft(y)
        .ticks(20, "s"));

g.append("g")
    .attr("transform", "translate(" + x(1) + ",0)")
    .attr("class", "axis")
    .call(d3.axisLeft(y)
        .ticks(20)
        .tickFormat(d3.format(".0s")));

g.append("g")
    .attr("transform", "translate(" + x(2) + ",0)")
    .attr("class", "axis")
    .call(d3.axisLeft(y)
        .ticks(20)
        .tickFormat(d3.formatPrefix(".1", 1e6)));
        
d3.selectAll(".tick").each(function(d,i){
  var tick = d3.select(this),
      text = tick.select('text'),
      bBox = text.node().getBBox();
      
  tick.insert('rect', ':first-child')
    .attr('x', bBox.x - 3)
    .attr('y', bBox.y - 3)
    .attr('height', bBox.height + 6)
    .attr('width', bBox.width + 6)
    .style('fill', d3.schemeCategory20[i % 20]);
  
});

</script>

答案 2 :(得分:2)

带填充的SVG文本背景颜色

&#13;
&#13;
<svg width="200" height="200">
<defs>
<filter x="-0.5" y="-0.5" width="2" height="2" id="solid">
<feFlood flood-color="#BDBDBD"></feFlood>
<feComposite in="SourceGraphic"></feComposite></filter>
</defs>
<text x="50" y="50" font-size="13" fill="#fff" filter="url(#solid)">7%</text>
</svg>
&#13;
&#13;
&#13;