Я работаю над d3 treemap v5, в котором мне нужно сохранять состояние древовидной карты в localstorage при каждом щелчке пользователя. Мой код находится в https://codesandbox.io/s/d3-treemap-wfbtg Когда пользователь щелкает верхнюю родительскую плитку, он детализируется до дочерних плиток. Как сохранить это в локальном хранилище, когда пользователь перезагружает браузер, он хочет видеть детализированные дочерние плитки.
class Treegraph extends React.Component {
createTreeChart = () => {
const width = 550;
const height = 500;
var paddingAllowance = 2;
const format = d3.format(",d");
const checkLowVal = d => {
console.log("ChecklowVal", d);
if (d.value < 2) {
return true;
}
};
const name = d =>
d
.ancestors()
.reverse()
.map(d => d.data.name)
.join(" / ");
function tile(node, x0, y0, x1, y1) {
d3.treemapBinary(node, 0, 0, width, height);
for (const child of node.children) {
child.x0 = x0 + (child.x0 / width) * (x1 - x0);
child.x1 = x0 + (child.x1 / width) * (x1 - x0);
child.y0 = y0 + (child.y0 / height) * (y1 - y0);
child.y1 = y0 + (child.y1 / height) * (y1 - y0);
}
}
const treemap = data =>
d3.treemap().tile(tile)(
d3
.hierarchy(data)
.sum(d => d.value)
.sort((a, b) => b.value - a.value)
);
const svg = d3
.select("#chart")
.append("svg")
.attr("viewBox", [0.5, -30.5, width, height + 30])
.style("font", "16px sans-serif");
const x = d3.scaleLinear().rangeRound([0, width]);
const y = d3.scaleLinear().rangeRound([0, height]);
let group = svg.append("g").call(render, treemap(data));
function render(group, root) {
const node = group
.selectAll("g")
.data(root.children.concat(root))
.join("g");
node
.filter(d => (d === root ? d.parent : d.children))
.attr("cursor", "pointer")
.on("click", d => (d === root ? zoomout(root) : zoomin(d)));
var tool = d3
.select("body")
.append("div")
.attr("class", "toolTip");
d3.select(window.frameElement).style("height", height - 20 + "px");
d3.select(window.frameElement).style("width", width - 20 + "px");
node
.append("rect")
.attr("id", d => (d.leafUid = "leaf"))
.attr("fill", d =>
d === root ? "#fff" : d.children ? "#045c79" : "#045c79"
)
.attr("stroke", "#fff")
.on("mousemove", function(d) {
tool.style("left", d3.event.pageX + 10 + "px");
tool.style("top", d3.event.pageY - 20 + "px");
tool.style("display", "inline-block");
tool.html(`${d.data.name}<br />(${format(d.data.value)})`);
})
.on("click", function(d) {
tool.style("display", "none");
})
.on("mouseout", function(d) {
tool.style("display", "none");
});
node
.append("foreignObject")
.attr("class", "foreignObject")
.attr("width", function(d) {
return d.dx - paddingAllowance;
})
.attr("height", function(d) {
return d.dy - paddingAllowance;
})
.append("xhtml:body")
.attr("class", "labelbody")
.append("div")
.attr("class", "label")
.text(function(d) {
return d.name;
})
.attr("text-anchor", "middle");
node
.append("clipPath")
.attr("id", d => (d.clipUid = "clip"))
.append("use")
.attr("xlink:href", d => d.leafUid.href);
node
.append("text")
.attr("clip-path", d => d.clipUid)
.attr("font-weight", d => (d === root ? "bold" : null))
.attr("font-size", d => {
if (d === root) return "0.8em";
const width = x(d.x1) - x(d.x0),
height = y(d.y1) - y(d.y0);
return Math.max(
Math.min(
width / 5,
height / 2,
Math.sqrt(width * width + height * height) / 25
),
9
);
})
.attr("text-anchor", d => (d === root ? null : "middle"))
.attr("transform", d =>
d === root
? null
: `translate(${(x(d.x1) - x(d.x0)) / 2}, ${(y(d.y1) - y(d.y0)) /
2})`
)
.selectAll("tspan")
.data(d =>
d === root
? name(d).split(/(?=\/)/g)
: checkLowVal(d)
? d.data.name.split(/(\s+)/).concat(format(d.data.value))
: d.data.name.split(/(\s+)/).concat(format(d.data.value))
)
.join("tspan")
.attr("x", 3)
.attr(
"y",
(d, i, nodes) =>
`${(i === nodes.length - 1) * 0.3 + (i - nodes.length / 2) * 0.9}em`
)
.text(d => d);
node
.selectAll("text")
.classed("text-title", d => d === root)
.classed("text-tile", d => d !== root)
.filter(d => d === root)
.selectAll("tspan")
.attr("y", "1.1em")
.attr("x", undefined);
group.call(position, root);
}
function position(group, root) {
group
.selectAll("g")
.attr("transform", d =>
d === root ? `translate(0,-30)` : `translate(${x(d.x0)},${y(d.y0)})`
)
.select("rect")
.attr("width", d => (d === root ? width : x(d.x1) - x(d.x0)))
.attr("height", d => (d === root ? 30 : y(d.y1) - y(d.y0)));
}
// When zooming in, draw the new nodes on top, and fade them in.
function zoomin(d) {
console.log("The zoomin func", d.data);
x.domain([d.x0, d.x1]);
y.domain([d.y0, d.y1]);
const group0 = group.attr("pointer-events", "none");
const group1 = (group = svg.append("g").call(render, d));
svg
.transition()
.duration(750)
.call(t =>
group0
.transition(t)
.remove()
.call(position, d.parent)
)
.call(t =>
group1
.transition(t)
.attrTween("opacity", () => d3.interpolate(0, 1))
.call(position, d)
);
}
// When zooming out, draw the old nodes on top, and fade them out.
function zoomout(d) {
console.log("The zoomout func", d.parent.data);
x.domain([d.parent.x0, d.parent.x1]);
y.domain([d.parent.y0, d.parent.y1]);
const group0 = group.attr("pointer-events", "none");
const group1 = (group = svg.insert("g", "*").call(render, d.parent));
svg
.transition()
.duration(750)
.call(t =>
group0
.transition(t)
.remove()
.attrTween("opacity", () => d3.interpolate(1, 0))
.call(position, d)
)
.call(t => group1.transition(t).call(position, d.parent));
}
return svg.node();
};
componentDidMount() {
this.createTreeChart();
}
render() {
return (
<React.Fragment>
<div id="chart" />
</React.Fragment>
);
}
}