[英]d3 zoom consumes event and prevents mouseover
我試圖在d3中創建一個可縮放的流圖,並且路徑可以移動。
從閱讀中我看到,從v4開始d3 zoom會消耗事件,因此可能是我的mouseover事件不再觸發的原因,但是沒有重新排序或pointer-events: all
我設置的pointer-events: all
似乎都有效。
在下面的例子中,是否有人能夠幫助我理解我必須做什么才能讓我的縮放和懸停工作? ( 這個示例還有一個代碼框 )
const width = 500;
const height = 500;
let numberOfDataPoints = 5;
const numberOfLayers = 3;
let data = [];
for (let i = 0; i < numberOfDataPoints; i++) {
let point = [];
for (let j = 0; j < numberOfLayers; j++) {
point.push(Math.floor(Math.random() * Math.floor(120)));
}
data.push(point);
}
const x = d3
.scaleLinear()
.domain([0, numberOfDataPoints - 1])
.range([0, width]);
const y = d3.scaleLinear().range([height, 0]);
const area = d3
.area()
.x((d, i) => x(i))
.y0(d => y(d[0]))
.y1(d => y(d[1]));
const stack = d3
.stack()
.keys(d3.range(numberOfLayers))
.offset(d3.stackOffsetWiggle)
.order(d3.stackOrderNone);
let layers = stack(data);
y.domain([
d3.min(layers, l => d3.min(l, d => d[0])),
d3.max(layers, l => d3.max(l, d => d[1]))
]);
update();
const zoomContainer = d3
.select('svg')
.append('rect')
.attr('width', width)
.attr('height', height)
.attr('fill', 'none')
.style('pointer-events', 'all');
const zoom = d3
.zoom()
.scaleExtent([1, 8])
.on('zoom', zoomed);
zoomContainer.call(zoom);
function update() {
let path = d3
.select('svg')
.selectAll('path')
.data(layers);
path
.enter()
.append('path')
.attr('fill', 'red')
.merge(path)
.attr('d', d => area(d))
.on('mouseover', () => {
d3.select('svg')
.selectAll('path')
.attr('fill', 'red');
d3.select(d3.event.target).attr('fill', 'green');
});
}
function zoomed() {
let transform = d3.event.transform;
transform.y = 0;
let updatedScale = transform.rescaleX(x);
d3.select('svg')
.selectAll('path')
.attr('d', area.x((d, i) => updatedScale(i)));
}
為什么這不起作用的假設是正確的(縮放容器消耗事件),修復只是刪除zoomContainer
並將縮放應用於svg而不是
const zoom = d3
.zoom()
.on('zoom', zoomed);
d3.select('svg').call(zoom);
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