dagre-d3
Version:
A D3-based renderer for Dagre
113 lines (90 loc) • 2.89 kB
HTML
<meta charset="utf-8">
<title>Dagre D3 Demo: User-defined Shapes and Arrows</title>
<link rel="stylesheet" href="demo.css">
<script src="https://d3js.org/d3.v5.min.js" charset="utf-8"></script>
<script src="../dagre-d3.js"></script>
<style id="css">
body {
font: 300 14px 'Helvetica Neue', Helvetica;
}
.node rect,
.node circle,
.node ellipse,
.node polygon {
stroke: #333;
fill: #fff;
stroke-width: 1.5px;
}
.edgePath path.path {
stroke: #333;
fill: none;
stroke-width: 1.5px;
}
</style>
<h1>Dagre D3 Demo: User-defined Shapes and Arrows</h1>
<svg width=960 height=600><g/></svg>
<section>
<p>An example that shows how to create and use user-defined shapes and arrows.
</section>
<script id="js">
// Create a new directed graph
var g = new dagreD3.graphlib.Graph().setGraph({});
g.setNode("house", { shape: "house", label: "house" });
g.setNode("rect", { shape: "rect" });
g.setEdge("house", "rect", { arrowhead: "hollowPoint" });
var svg = d3.select("svg"),
inner = svg.select("g");
// Set up zoom support
var zoom = d3.zoom().on("zoom", function() {
inner.attr("transform", d3.event.transform);
});
svg.call(zoom);
// Create the renderer
var render = new dagreD3.render();
// Add our custom shape (a house)
render.shapes().house = function(parent, bbox, node) {
var w = bbox.width,
h = bbox.height,
points = [
{ x: 0, y: 0 },
{ x: w, y: 0 },
{ x: w, y: -h },
{ x: w/2, y: -h * 3/2 },
{ x: 0, y: -h }
];
shapeSvg = parent.insert("polygon", ":first-child")
.attr("points", points.map(function(d) { return d.x + "," + d.y; }).join(" "))
.attr("transform", "translate(" + (-w/2) + "," + (h * 3/4) + ")");
node.intersect = function(point) {
return dagreD3.intersect.polygon(node, points, point);
};
return shapeSvg;
};
// Add our custom arrow (a hollow-point)
render.arrows().hollowPoint = function normal(parent, id, edge, type) {
var marker = parent.append("marker")
.attr("id", id)
.attr("viewBox", "0 0 10 10")
.attr("refX", 9)
.attr("refY", 5)
.attr("markerUnits", "strokeWidth")
.attr("markerWidth", 8)
.attr("markerHeight", 6)
.attr("orient", "auto");
var path = marker.append("path")
.attr("d", "M 0 0 L 10 5 L 0 10 z")
.style("stroke-width", 1)
.style("stroke-dasharray", "1,0")
.style("fill", "#fff")
.style("stroke", "#333");
dagreD3.util.applyStyle(path, edge[type + "Style"]);
};
// Run the renderer. This is what draws the final graph.
render(inner, g);
// Center the graph
var initialScale = 0.75;
svg.call(zoom.transform, d3.zoomIdentity.translate((svg.attr("width") - g.graph().width * initialScale) / 2, 20).scale(initialScale));
svg.attr('height', g.graph().height * initialScale + 40);
</script>
<script src="demo.js"></script>