放大D3.J时,如何删除非整数tick虫?
问题:我正在尝试创建一个可调/可缩放的线性X轴,每个整数从0到预定义的大数字(例如1000,但可能更高)。显然,这并不适合屏幕,并且可以阅读,因此我需要它脱离屏幕并可以放松。从0到10开始是可以接受的。到目前为止,我的解决方案存在许多问题,但是第一个是如果我放大,D3会自动在小数点位置的整数之间添加tick,以在屏幕上继续在屏幕上继续有10个滴答。第二个是我缩小时,范围将显示到1000以上。
快速注意:将显示的数据无关紧要。无论是否在1000上有数据点,我都无法根据数据集确定域,轴必须从0到1000。
我尝试过的解决方案:
- .ticks()。这使我可以指定我想要的壁虱数量。但是,这似乎将所有壁虱都放入指定的初始范围。如果我增加了超过SVG尺寸的范围的宽度,它会散布滴答,但并非以任何可控的方式(据我所知)。此外,我遇到了平移和缩放的性能问题。我发现这种行为很奇怪,因为如果我不指定刻度,它会使我可以在没有任何滞后的情况下泛滥。 i 假设发生滞后是因为它试图立即渲染所有1000个tick,并且默认的D3.js功能在您滚动时会动态呈现它们。这似乎是一个潜在的解决方案,但我不确定如何执行它。
- .tickvalues()。我可以提供0到1000的数组,这起作用,但表现出与.ticks()完全相同的滞后行为。当我放大时,这也不会动态地将滴答到10或100。
- .tickformat()。我可以通过一个函数运行一个函数,以便将任何非全体编号转换为空字符串。但是,这仍然留下了滴答线。
这是我的代码中使用最新版本的D3.js(7.3)的相关部分:
const height = 500
const width = 1200
const margin = {
top: 20,
right: 20,
bottom: 20,
left: 35
}
const innerWidth = width - margin.left - margin.right
const innerHeight = height - margin.top - margin.bottom
const xScale = d3.scaleLinear()
.domain([0, 10])
.range([0, innerWidth])
const svg = d3.select('svg')
.attr("width", width)
.attr("height", height)
svg.append('defs').append('clipPath')
.attr('id', 'clip')
.append('rect')
.attr('width', innerWidth)
.attr('height', innerHeight)
const zoom = d3.zoom()
.scaleExtent([1, 8])
.translateExtent([
[0, 0],
[xScale(upperBound), 0]
])
.on('zoom', zoomed)
const g = svg.append('g')
.attr('transform', `translate(${margin.left}, ${margin.top})`)
const xAxis = d3.axisBottom()
.scale(xScale)
const xAxisG = g.append('g')
.style('clip-path', 'url(#clip)')
.attr("class", "x-axis")
.call(xAxis)
.attr('transform', `translate(0, ${innerHeight})`)
svg.call(zoom)
function zoomed(event) {
const updateX = event.transform.rescaleX(xScale)
const zx = xAxis.scale(updateX)
xAxisG.call(zx)
}
Problem: I am trying to create a pannable/zoomable Linear X axis with ticks on each integer from 0 to a predefined large number (let's say 1000 but could be much higher). Obviously this will not all fit on the screen and be readable, so I need it to go offscreen and be pannable. Starting with 0 through 10 is acceptable. There are a number of problems with my solution so far, but the first being that if I zoom in, D3 automatically adds ticks in between the integers at decimal places to continue to have 10 ticks on the screen. The second being when I zoom out, the range will display beyond 1000.
A quick note: The data that will be displayed is irrelevant. The axis has to go from 0 to 1000 regardless if there is a datapoint on 1000 or not so I cannot determine the domain based on my dataset.
Solutions I've tried:
- .ticks(). This lets me specify the number of ticks I want. However this appears to put all the ticks into the initial range specified. If I increase the width of the range past the svg size, it spreads out the ticks, but not in any controllable way (to my knowledge). Additionally I run into performance issues where the panning and zooming. I find this behavior strange since if I don't specify ticks, it makes an infinite number I can pan through without any lag. I assume the lag occurs because it's trying to render all 1000 ticks immediately and the default d3.js functionality renders them dynamically as you scroll. This seems like a potential solution, but I'm not sure how to execute it.
- .tickValues(). I can provide an array of 0 through 1000 and this works but exhibits the exact same lag behavior as .ticks(). This also doesn't dynamically combine ticks into 10s or 100s as I zoom out.
- .tickFormat(). I can run a function through so that any non-integer number is converted to an empty string. However, this still leaves the tick line.
Here are the relevant parts of my code using the latest version of D3.js(7.3):
const height = 500
const width = 1200
const margin = {
top: 20,
right: 20,
bottom: 20,
left: 35
}
const innerWidth = width - margin.left - margin.right
const innerHeight = height - margin.top - margin.bottom
const xScale = d3.scaleLinear()
.domain([0, 10])
.range([0, innerWidth])
const svg = d3.select('svg')
.attr("width", width)
.attr("height", height)
svg.append('defs').append('clipPath')
.attr('id', 'clip')
.append('rect')
.attr('width', innerWidth)
.attr('height', innerHeight)
const zoom = d3.zoom()
.scaleExtent([1, 8])
.translateExtent([
[0, 0],
[xScale(upperBound), 0]
])
.on('zoom', zoomed)
const g = svg.append('g')
.attr('transform', `translate(${margin.left}, ${margin.top})`)
const xAxis = d3.axisBottom()
.scale(xScale)
const xAxisG = g.append('g')
.style('clip-path', 'url(#clip)')
.attr("class", "x-axis")
.call(xAxis)
.attr('transform', `translate(0, ${innerHeight})`)
svg.call(zoom)
function zoomed(event) {
const updateX = event.transform.rescaleX(xScale)
const zx = xAxis.scale(updateX)
xAxisG.call(zx)
}
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您可以简单地选择容器组本身中的刻度,而不是处理轴的方法,而是删除非智能者:
以下是您的代码,则具有该更改:
Instead of dealing with the axis' methods, you can simply select the ticks in the container group itself, removing the non-integers:
Here is your code with that change: