0
我正在使用d3 v4。我想爲折線圖創建一個滾動條,以便爲每個點顯示的信息完全由與文本大小相同的背景框捕獲。不過,我很困惑如何做到這一點。我創建的SVG元素像這樣在d3折線圖中,如何在我的文字背後創建與我所在的文字大小相同的邊框?
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 rect = focus.append("rect")
.attr("x", 9)
.attr("dy", ".35em")
.attr("width", 50)
.attr("height", 50)
.attr("fill", "yellow");
var text = focus.append("text")
.attr("x", 10)
.attr("y", 10);
svg.append("rect")
.attr("class", "overlay")
.attr("width", width)
.attr("height", height)
.on("mouseover", function() { focus.style("display", null); })
.on("mouseout", function() { focus.style("display", "none"); })
.on("mousemove", mousemove);
function mousemove() {
var x0 = x.invert(d3.mouse(this)[0]),
i = bisectDate(data, x0, 1),
d0 = data[i - 1],
d1 = data[i],
d = x0 - d0.date > d1.date - x0 ? d1 : d0;
focus.attr("transform", "translate(" + x(d.index_date) + "," + y(d.value) + ")");
var descriptor = d.value + "\n" + d.index_date
focus.select("text").text(descriptor);
}
雖然我有幾個問題。首先,邊界框的尺寸是固定的,因此它不捕獲文本。其次,我的新行似乎在我的文本中被忽略。理想情況下,我需要兩條線,一條帶有值,另一條帶有日期。小提琴,說明我到目前爲止 - https://jsfiddle.net/8reo2Lvc/1/。如何創建與周圍文本大小相同的邊界框?