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Merge pull request #31 from mkobetic/balances-chart
coin2html: add balances chart
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,141 @@ | ||
| import { stratify, treemap } from "d3-hierarchy"; | ||
| import { select } from "d3-selection"; | ||
| import { group } from "d3-array"; | ||
| import { | ||
| addBalanceDepthInput, | ||
| emptyElement, | ||
| MainView, | ||
| State, | ||
| updateAccount, | ||
| } from "./views"; | ||
| import { scaleSequential } from "d3-scale"; | ||
| import { interpolateBlues } from "d3-scale-chromatic"; | ||
| import { AccountBalanceAndTotal } from "./utils"; | ||
|
|
||
| function max(a: number, b: number) { | ||
| return a > b ? a : b; | ||
| } | ||
|
|
||
| // based on https://observablehq.com/@d3/nested-treemap | ||
| export function viewBalancesChart(options?: { | ||
| negated?: boolean; // is this negatively denominated account (e.g. Income/Liability) | ||
| }) { | ||
| const containerSelector = MainView; | ||
| const account = State.SelectedAccount; | ||
| const opts = { negated: false }; // defaults | ||
| Object.assign(opts, options); | ||
| emptyElement(containerSelector); | ||
| addBalanceDepthInput(containerSelector); | ||
| const date = State.EndDate; | ||
| // build the hierarchical data structure that d3 treemap expects | ||
| let root = stratify<AccountBalanceAndTotal>() | ||
| .id(({ account }) => account.fullName) | ||
| .parentId(({ account }) => | ||
| account.parent && account.parent != State.SelectedAccount.parent | ||
| ? account.parent.fullName | ||
| : undefined | ||
| )(account.withAllChildBalances(date)); | ||
| // compute the individual node.value that drives the treemap layout | ||
| root = root.sum((a) => | ||
| max( | ||
| (opts.negated ? -1 : 1) * | ||
| account.commodity.convert(a.balance, date).toNumber(), | ||
| 0 | ||
| ) | ||
| ); | ||
|
|
||
| const [width, height] = [1200, 800]; | ||
| const tm = treemap<AccountBalanceAndTotal>() | ||
| .size([width, height]) | ||
| .padding(4) | ||
| .paddingTop(20); | ||
| const nodes = tm(root); | ||
| const nodesByDepth = Array.from(group(nodes, (d) => d.depth)) | ||
| .sort((a, b) => a[0] - b[0]) | ||
| .map((d) => d[1]) | ||
| .slice(0, State.View.BalanceDepth); | ||
|
|
||
| let uidCounter = 0; | ||
|
|
||
| const svg = select(containerSelector) | ||
| .append("svg") | ||
| .attr("id", "chart") | ||
| .attr("width", "100%") | ||
| .attr("height", height); | ||
| // .attr("viewBox", [0, 0, width, height]); | ||
| // .attr( | ||
| // "style", | ||
| // "max-width: 100%; height: auto; overflow: visible; font: 10px sans-serif;" | ||
| // ); | ||
|
|
||
| const color = scaleSequential( | ||
| [0, nodesByDepth.length * 1.5], | ||
| interpolateBlues | ||
| ); | ||
|
|
||
| const node = svg | ||
| .selectAll("g") | ||
| .data(nodesByDepth) | ||
| .join("g") | ||
| .selectAll("g") | ||
| .data((d) => d) | ||
| .join("g") | ||
| .attr("transform", (d) => `translate(${d.x0},${d.y0})`); | ||
|
|
||
| node | ||
| .append("title") | ||
| .text(({ data }) => | ||
| data.account.children.length > 0 && !data.balance.isZero | ||
| ? `${data.account.fullName} ${data.total} [ ${data.balance} ]` | ||
| : `${data.account.fullName} ${data.total}` | ||
| ); | ||
|
|
||
| node | ||
| .append("rect") | ||
| .attr("id", (d: any) => (d.nodeUid = `node-${uidCounter++}`)) | ||
| .attr("fill", (d) => color(d.depth)) | ||
| .attr("width", (d) => d.x1 - d.x0) | ||
| .attr("height", (d) => d.y1 - d.y0) | ||
| .on("click", (e, { data }) => { | ||
| State.SelectedAccount = data.account; | ||
| updateAccount(); | ||
| }); | ||
|
|
||
| // add a clippath to clip the text to the rectangle | ||
| node | ||
| .append("clipPath") | ||
| .attr("id", (d: any) => (d.clipUid = `clip-${uidCounter++}`)) | ||
| .append("use") | ||
| .attr("xlink:href", (d: any) => `#${d.nodeUid}`); | ||
|
|
||
| node | ||
| .append("text") | ||
| .attr("clip-path", (d: any) => `url(#${d.clipUid})`) | ||
| .on("click", (e, { data }) => { | ||
| State.SelectedAccount = data.account; | ||
| updateAccount(); | ||
| }) | ||
| .selectAll("tspan") | ||
| .data(({ data }) => { | ||
| const bits = [data.account.name, data.total.toString()]; | ||
| if (data.account.children.length > 0 && !data.balance.isZero) | ||
| bits.push(data.balance.toString()); | ||
| return bits; | ||
| }) | ||
| .join("tspan") | ||
| .text((d) => d); | ||
|
|
||
| const narrowBoxLimit = 150; | ||
| // if the box is wide, put the spans on the same line | ||
| node | ||
| .filter((d: any) => d.x1 - d.x0 > narrowBoxLimit) | ||
| .selectAll("tspan") | ||
| .attr("dx", 10) | ||
| .attr("y", 15); | ||
| // if the box is narrow, put the spans on separate lines | ||
| node | ||
| .filter((d) => d.x1 - d.x0 <= narrowBoxLimit) | ||
| .selectAll("tspan") | ||
| .attr("x", 10) | ||
| .attr("dy", 15); | ||
| } |
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