D3.js焦点+上下文溢出 [英] D3.js Focus + Context Overflow
本文介绍了D3.js焦点+上下文溢出的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
您好，我要重新设置Focus +上下文图表的位置： Focus + Context Example a>使用条形图。我已经能够得到酒吧，但我有一些重叠的问题。当您在上下文区域中进行选择时，对焦区域有时会显示干扰标尺显示的条。这里是我的代码，有一些部分，我知道我需要清理，所以不要专注于那。有人可以在这里指向正确的方向吗？
Hello all I'm trying to repurpose the Focus+Context graph found here: Focus + Context Example to work with a bar graph instead. I've been able to get the bars in but I have some overlap problems. When you make a selection in the context area the focus area will sometimes display bars that interfere with the display of the scale. Here's my code, there are some parts I know I need to clean up so lets not focus on that. Can someone point me in the right direction here?
<!DOCTYPE html>
<meta charset="utf-8">
<style>
svg {
font: 10px sans-serif;
}
path {
fill: steelblue;
}
.axis path,
.axis line {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
.brush .extent {
stroke: #fff;
fill-opacity: .125;
shape-rendering: crispEdges;
}
</style>
<body>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script>
var focusGraph;
var dataTest = d3.csv("sp500.csv");
var margin = {top: 10, right: 10, bottom: 100, left: 40},
margin2 = {top: 430, right: 10, bottom: 20, left: 40},
width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom,
height2 = 500 - margin2.top - margin2.bottom;
var parseDate = d3.time.format("%b %Y").parse;
var x = d3.time.scale().range([0, width]),
x2 = d3.time.scale().range([0, width]),
y = d3.scale.linear().range([0,height]),
y2 = d3.scale.linear().range([0,height2]);
var xAxis = d3.svg.axis().scale(x).orient("bottom"),
xAxis2 = d3.svg.axis().scale(x2).orient("bottom"),
yAxis = d3.svg.axis().scale(y).orient("left");
var brush = d3.svg.brush()
.x(x2)
.on("brush", brushed);
var area = d3.svg.area()
.interpolate("monotone")
.x(function(d) { return x(d.date); })
.y0(height)
.y1(function(d) { return y(d.price); });
/*var area2 = d3.svg.area()
.interpolate("monotone")
.x(function(d) { return x2(d.date); })
.y0(height2)
.y1(function(d) { return y2(d.price); });*/
var svg = d3.select("body").append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom);
svg.append("defs").append("clipPath")
.attr("id", "clip")
.append("rect")
.attr("width", width)
.attr("height", height);
var focus = svg.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
var context = svg.append("g")
.attr("transform", "translate(" + margin2.left + "," + margin2.top + ")");
d3.csv("sp500.csv", function(error, data) {
data.forEach(function(d) {
d.date = parseDate(d.date);
d.price = +d.price;
});
x.domain(d3.extent(data.map(function(d) { return d.date; })));
y.domain([0, d3.max(data.map(function(d) { return d.price; }))]);
x2.domain(x.domain());
y2.domain(y.domain());
focus.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
focus.append("g")
.attr("class", "y axis")
.call(yAxis);
focusGraph = focus.selectAll("rect")
.data(data)
.enter().append("rect")
.attr("x", function(d, i) { return x(d.date); })
.attr("y", function(d) { return height - y(d.price); })
.attr("width", 5)
.attr("height", function(d) { return y(d.price); });
context.selectAll("rect")
.data(data)
.enter().append("rect")
.attr("x", function(d, i) { return x2(d.date); })
.attr("y", function(d) { return height2 - y2(d.price); })
.attr("width", 5)
.attr("height", function(d) { return y2(d.price); });
context.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height2 + ")")
.call(xAxis2);
context.append("g")
.attr("class", "x brush")
.call(brush)
.selectAll("rect")
.attr("y", -6)
.attr("height", height2 + 7);
});
function brushed() {
var data = d3.csv("sp500.csv");
x.domain(brush.empty() ? x2.domain() : brush.extent());
focusGraph.attr("x", function(d, i) { return x(d.date); });
focusGraph.attr("width", 20);
focus.select(".x.axis").call(xAxis);
}
</script>
推荐答案
这是因为你只是忘记设置剪辑路径图表。因此，请考虑以下想法：
That's because you simply forgot to set clip-path to the chart. So consider the following idea:
var focus = svg.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
// here we insert the new group that will be the container for the bars
var barsGroup = focus.append("g")
.attr('clip-path', 'url(#clip)');
然后在这个新组中定义实际图表：
And then you define the actual chart as within this new group:
focusGraph = barsGroup.selectAll("rect")
.data(data)
.enter().append("rect")
查看演示： http://jsfiddle.net/JGytk/
这篇关于D3.js焦点+上下文溢出的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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