Vertical sankey with elegant links to entry and exit nodes
align = d3.sankeyCenter
// If the result is negative a is sorted before b.
// If the result is positive b is sorted before a.
function sortLinks(a, b) {
if (a.target.top) {
return -1;
} else if (b.target.top) {
return 1;
} else if (
a.target.sourceLinks.length == 0 &&
b.target.sourceLinks.length > 0
) {
return 1;
} else if (
b.target.sourceLinks.length == 0 &&
a.target.sourceLinks.length > 0
) {
return -1;
} else if (
a.source.targetLinks.length == 0 &&
b.source.targetLinks.length > 0
) {
return -1;
} else if (
b.source.targetLinks.length == 0 &&
a.source.targetLinks.length > 0
) {
return 1;
} else {
return b.value - a.value;
}
}
chart = {
let graph = clone(graph3);
const svg = d3
.create("svg")
.attr("width", svgWidth)
.attr("height", svgHeight);
let backgroundRect = svg
.append('rect')
.attr("x", 0)
.attr("y", 0)
.attr("width", svgWidth)
.attr("height", svgWidth)
.style("fill", bkdColour);
let defs = svg.append("defs");
let hash = defs
.append("pattern")
.attr("id", "hash")
.attr("width", 6)
.attr("height", 8)
.attr("patternUnits", "userSpaceOnUse")
.attr("patternTransform", "rotate(135)");
hash
.append("rect")
.attr("width", 3)
.attr("height", 8)
.attr("fill", mainColour);
let gradientStart = defs
.append("linearGradient")
.attr("id", "linearStart")
.attr("x1", 0)
.attr("y1", 0)
.attr("x2", "100%")
.attr("y2", 0);
let gradientBottom = defs
.append("linearGradient")
.attr("id", "linearBottom")
.attr("x1", 0)
.attr("y1", 0)
.attr("x2", 0)
.attr("y2", "100%");
let gradientMiddle = defs
.append("linearGradient")
.attr("id", "linearMiddle")
.attr("x1", 0)
.attr("y1", 0)
.attr("x2", 0)
.attr("y2", "100%");
gradientStart
.append("stop")
.attr("offset", "0%")
.attr("stop-color", bkdColour);
gradientStart
.append("stop")
.attr("offset", "100%")
.attr("stop-color", mainColour);
gradientBottom
.append("stop")
.attr("offset", "0%")
.attr("stop-color", mainColour);
gradientBottom
.append("stop")
.attr("offset", "50%")
.attr("stop-color", mainColour);
gradientBottom
.append("stop")
.attr("offset", "100%")
.attr("stop-color", bkdColour);
gradientMiddle
.append("stop")
.attr("offset", "0%")
.attr("stop-color", bkdColour);
gradientMiddle
.append("stop")
.attr("offset", "50%")
.attr("stop-color", mainColour);
gradientMiddle
.append("stop")
.attr("offset", "100%")
.attr("stop-color", mainColour);
let g = svg
.append("g")
.attr("transform", "translate(" + chartPadding + "," + chartPadding + ")");
let rects = g
.selectAll("rect")
.data(graph.nodes)
.join("rect")
.attr("x", d => d.x0)
.attr("y", d => d.y0)
.attr("height", nodeHeight)
.attr("width", nodeWidth)
.style("stroke", bkdColour)
.style("fill", nodeFill);
const link = g
.append("g")
.selectAll("g")
.data(graph.links)
.join("g")
.append("path")
.attr("fill", linkFill)
.attr("stroke-width", linkStrokeWidth)
.style("stroke", linkStroke)
.attr("d", d => d.path);
let labels = g
.append("g")
.attr("font-family", "sans-serif")
.attr("font-size", 10)
.selectAll("text")
.data(graph.nodes)
.join("text")
.attr("x", d => d.labelX)
.attr("y", d => d.labelY)
.attr("text-anchor", d => d.labelAlign)
.text(d => d.name);
if (rotate) {
svg.attr("width", svgHeight).attr("height", svgWidth);
labels
.attr("transform", function(d) {
return "rotate(270, " + d.labelX + ", " + d.labelY + ")";
})
.attr("dy", "0.35em");
let cx = chartHeight / 2 + chartPadding / 2;
let cy = chartHeight / 2 + chartPadding / 2;
g.attr(
"transform",
"translate(0, " + chartPadding + ") rotate(90, " + cx + ", " + cy + " )"
);
}
return svg.node();
}
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