我想为简单的d3.js(v4)图更改轴的颜色。下图中的y轴是成品的示例;
我怀疑我使用的方法实现这一点有点难看,我相信根据以下描述应该有一个替代方案,我还不明白。
axis component是文本,路径和线条元素的组合,需要更改各自的样式(笔触和填充)。
此时我发现改变组件颜色的唯一方法是在代码的<style>
部分单独设置样式...
.axisRed line{
stroke: red;
}
.axisRed path{
stroke: red;
}
.axisRed text{
fill: red;
}
...并在稍后在JavaScript中附加该类时将其应用于y轴;
svg.append("g")
.attr("class", "axisRed")
.call(d3.axisLeft(y));
有没有办法可以在追加y轴而不是在.style("<some style>", "<some value>")
部分声明时通过<style>
行应用这些样式?
代码示例为here。
我试图尝试解决各个DOM组件,例如&#39;域&#39;上课,但没有成功。我怀疑我不太了解轴组件的层次结构。
答案 0 :(得分:7)
在D3上你有几个选项来设置元素的样式:
选项A :在您的班级中使用样式标记:
axisRed line{
stroke: red;
}
.axisRed path{
stroke: red;
}
.axisRed text{
fill: red;
}
// apply applying that class to the y
svg.append("g")
.attr("class", "axisRed")
.call(d3.axisLeft(y));
选项B :将样式标记与自动生成类一起使用:
D3为轴线分配domain
类,并在组内&#39; g&#39;对于每个tick类tick
行和text
。没有定义特定的类:
<style>
path.domain {
stroke: red;
}
.tick text {
fill:blue
}
</style
.
.
svg.append("g").call(d3.axisLeft(y));
// generate code
<path class="domain" stroke="#000" d="M-6,450.5H0.5V0.5H-6"></path>
<g class="tick" opacity="1" transform="translate(0,414)">
<line stroke="#000" x2="-6" y1="0.5" y2="0.5"></line>
<text fill="#000" x="-9" y="0.5" dy=".32em">50</text>
</g>
选项C :在上线时间内联
在 D3 V3 上你可以做一个更紧凑的事情:
svg.append("line")
.style({
fill:"none",
stroke:"#f00",
"stroke-width":"10"
})
但是在 D3 V4 上,不起作用。所以我打开一个问题&#39;:你可以在这里查看并关注进度:https://github.com/d3/d3-selection/issues/82
** 更新 ** 在V4上,您必须包含selection-multi:
<script src="https://d3js.org/d3.v4.min.js"></script>
<script src="https://d3js.org/d3-selection-multi.v0.4.min.js"></script>
然后使用:styles
intead style
和attrs
代替attr
:
svg.append("line")
.styles({
fill:"none",
stroke:"#f00",
"stroke-width":"10"
})
为您的例子:
svg.selectAll(".domain")
.styles({ fill:"none", stroke:"#f00", "stroke-width":"1" });
现在你有一种简洁的方式来设计你的元素
额外:您可以设置任何元素的样式和内容:
var svg = d3.select("body").append("svg")
.attrs({width:600, height:600})
.styles({
border:"1px",
"border-style":"solid",
"border-color":"#f00"})
答案 1 :(得分:5)
要内联样式,只需保留对添加轴的引用并选择组件:
// Add the Y Axis
var axis = svg.append("g")
.call(d3.axisLeft(y));
axis.selectAll("line")
.style("stroke", "purple");
axis.selectAll("path")
.style("stroke", "green");
axis.selectAll("text")
.style("stroke", "blue");
完整示例:
<!DOCTYPE html>
<meta charset="utf-8">
<body>
<!-- load the d3.js library -->
<script src="https://d3js.org/d3.v4.min.js"></script>
<script>
// set the dimensions and margins of the graph
var margin = {
top: 20,
right: 20,
bottom: 30,
left: 50
},
width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
// parse the date / time
var parseTime = d3.timeParse("%d-%b-%y");
// set the ranges
var x = d3.scaleTime().range([0, width]);
var y = d3.scaleLinear().range([height, 0]);
// define the line
var valueline = d3.line()
.x(function(d) {
return x(d.date);
})
.y(function(d) {
return y(d.close);
});
// append the svg obgect to the body of the page
// appends a 'group' element to 'svg'
// moves the 'group' element to the top left margin
var svg = d3.select("body").append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform",
"translate(" + margin.left + "," + margin.top + ")");
var data = [{
"date": "1-May-12",
"close": "58.13"
}, {
"date": "30-Apr-12",
"close": "53.98"
}, {
"date": "27-Apr-12",
"close": "67.00"
}, {
"date": "26-Apr-12",
"close": "89.70"
}, {
"date": "25-Apr-12",
"close": "99.00"
}, {
"date": "24-Apr-12",
"close": "130.28"
}, {
"date": "23-Apr-12",
"close": "166.70"
}, {
"date": "20-Apr-12",
"close": "234.98"
}, {
"date": "19-Apr-12",
"close": "345.44"
}, {
"date": "18-Apr-12",
"close": "443.34"
}, {
"date": "17-Apr-12",
"close": "543.70"
}, {
"date": "16-Apr-12",
"close": "580.13"
}, {
"date": "13-Apr-12",
"close": "605.23"
}, {
"date": "12-Apr-12",
"close": "622.77"
}, {
"date": "11-Apr-12",
"close": "626.20"
}, {
"date": "10-Apr-12",
"close": "628.44"
}, {
"date": "9-Apr-12",
"close": "636.23"
}, {
"date": "5-Apr-12",
"close": "633.68"
}, {
"date": "4-Apr-12",
"close": "624.31"
}, {
"date": "3-Apr-12",
"close": "629.32"
}, {
"date": "2-Apr-12",
"close": "618.63"
}, {
"date": "30-Mar-12",
"close": "599.55"
}, {
"date": "29-Mar-12",
"close": "609.86"
}, {
"date": "28-Mar-12",
"close": "617.62"
}, {
"date": "27-Mar-12",
"close": "614.48"
}, {
"date": "26-Mar-12",
"close": "606.98"
}];
// format the data
data.forEach(function(d) {
d.date = parseTime(d.date);
d.close = +d.close;
});
// Scale the range of the data
x.domain(d3.extent(data, function(d) {
return d.date;
}));
y.domain([0, d3.max(data, function(d) {
return d.close;
})]);
// Add the valueline path.
svg.append("path")
.data([data])
.attr("class", "line")
.attr("d", valueline)
.style("fill", "none")
.style("stroke", "steelblue");
// Add the X Axis
svg.append("g")
.attr("transform", "translate(0," + height + ")")
.call(d3.axisBottom(x));
// Add the Y Axis
var axis = svg.append("g")
.call(d3.axisLeft(y));
axis.selectAll("line")
.style("stroke", "purple")
axis.selectAll("path")
.style("stroke", "green")
axis.selectAll("text")
.style("stroke", "blue")
</script>
</body>
答案 2 :(得分:1)
如果您将 D3.js V5与DC.js一起使用,请使用以下代码:
chart.on('pretransition', (chart) => {
const svg = chart.select('svg');
svg.selectAll("line").style("stroke", "purple");
svg.selectAll("path").style("stroke", "green");
svg.selectAll("text").style("stroke", "blue");
});
答案 3 :(得分:0)
如果您不想使用样式标签,这种事情怎么样?
svg.append("g")
.attr("class", "axisRed") // don't need this anymore but just re-suing your code
.call(d3.axisLeft(y))
.select("path")
.attr("stroke","red")
答案 4 :(得分:0)
对于v5,您可以使用以下代码,选择域并定义所需轴的笔触并附加到svg。
yAxis = (g) =>
g
.attr("transform", `translate(${50} ${0})`)
.call((g) =>
g
.selectAll(".domain")
.attr("stroke-width", 0.3)
.attr("stroke", d3.schemePaired[7])
);
svg.append("g").call(yAxis);