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var WIDTH = 960,
HEIGHT = 500,
MARGIN = 14, // space in between <rects>
PADDING = 5, // space in between <text> label and <rect> border
EDGE_ROUTING_MARGIN = 3;
var color = d3.scale.category20();
var d3cola = cola.d3adaptor()
.avoidOverlaps(true)
.size([WIDTH, HEIGHT]);
var svg, fg;
jQuery(function () {
draw_graph();
});
function redraw_on_zoom () {
fg.attr("transform",
"translate(" + d3.event.translate + ")" +
" scale(" + d3.event.scale + ")");
}
function draw_graph () {
svg = d3.select("body").append("svg")
.attr("width", WIDTH)
.attr("height", HEIGHT);
svg.append('rect')
.attr('class', 'background')
.attr('width', "100%")
.attr('height', "100%")
.call(d3.behavior.zoom().on("zoom", redraw_on_zoom));
fg = svg.append('g');
d3.json("test.json", function (error, graph) {
d3cola
.nodes(graph.nodes)
.links(graph.links)
.flowLayout("y", 150)
.symmetricDiffLinkLengths(30);
//.jaccardLinkLengths(100);
// define arrow markers for graph links
fg.append('svg:defs').append('svg:marker')
.attr('id', 'end-arrow')
.attr('viewBox', '0 -5 10 10')
.attr('refX', 6)
.attr('markerWidth', 8)
.attr('markerHeight', 8)
.attr('orient', 'auto')
.append('svg:path')
.attr('d', 'M0,-5L10,0L0,5')
.attr('fill', '#000');
var path = fg.selectAll(".link")
.data(graph.links)
.enter().append('svg:path')
.attr('class', 'link');
var node = fg.selectAll(".node")
.data(graph.nodes)
.enter().append("g")
.attr("class", "node")
.call(d3cola.drag);
var rect = node.append("rect")
.attr("rx", 5).attr("ry", 5);
var label = node.append("text")
.text(function (d) { return d.name; })
.each(function (d) {
var b = this.getBBox();
// Calculate width/height of rectangle from text bounding box.
d.rect_width = b.width + 2 * PADDING;
d.rect_height = b.height + 2 * PADDING;
// Now set the node width/height as used by cola for
// positioning. This has to include the margin
// outside the rectangle.
d.width = d.rect_width + 2 * MARGIN;
d.height = d.rect_height + 2 * MARGIN;
});
// label.append("title")
// .text(function (d) { return d.name; });
rect.attr('width', function (d, i) { return d.rect_width; })
.attr('height', function (d, i) { return d.rect_height; });
// Centre label
label.attr("x", function (d) { return d.rect_width / 2; })
.attr("y", function (d) { return d.rect_height / 2; });
d3cola.start(10,20,20);
d3cola.on("tick", function () {
node.each(function (d) {
// cola sets the bounds property which is a Rectangle
// representing the space which other nodes should not
// overlap. The innerBounds property seems to tell
// cola the Rectangle which is the visible part of the
// node, minus any blank margin.
d.innerBounds = d.bounds.inflate(-MARGIN);
});
node.attr("transform", function (d) {
return "translate(" +
d.innerBounds.x + "," +
d.innerBounds.y + ")";
});
path.each(function (d) {
if (isIE()) this.parentNode.insertBefore(this, this);
});
path.attr("d", function (d) {
// Undocumented: https://github.com/tgdwyer/WebCola/issues/52
cola.vpsc.makeEdgeBetween(
d,
d.source.innerBounds,
d.target.innerBounds,
// This value is related to but not equal to the
// distance of arrow tip from object it points at:
5
);
var lineData = [
{ x: d.sourceIntersection.x, y: d.sourceIntersection.y },
{ x: d.arrowStart.x, y: d.arrowStart.y }
];
return lineFunction(lineData);
});
});
// d3cola.on("end", routeEdges);
// turn on overlap avoidance after first convergence
// d3cola.on("end", function () {
// if (!d3cola.avoidOverlaps()) {
// graph.nodes.forEach(function (v) {
// v.width = v.height = 10;
// });
// d3cola.avoidOverlaps(true);
// d3cola.start();
// }
// });
});
}
var lineFunction = d3.svg.line()
.x(function (d) { return d.x; })
.y(function (d) { return d.y; })
.interpolate("linear");
var routeEdges = function () {
d3cola.prepareEdgeRouting(EDGE_ROUTING_MARGIN);
path.attr("d", function (d) {
return lineFunction(d3cola.routeEdge(d)
// // show visibility graph
//, function (g) {
// if (d.source.id === 10 && d.target.id === 11) {
// g.E.forEach(function (e) {
// vis.append("line").attr("x1", e.source.p.x).attr("y1", e.source.p.y)
// .attr("x2", e.target.p.x).attr("y2", e.target.p.y)
// .attr("stroke", "green");
// });
// }
// }));
);
});
if (isIE()) {
path.each(function (d) {
this.parentNode.insertBefore(this, this);
});
}
};
function isIE () {
return (navigator.appName == 'Microsoft Internet Explorer') ||
((navigator.appName == 'Netscape') &&
(new RegExp("Trident/.*rv:([0-9]{1,}[\.0-9]{0,})").exec(navigator.userAgent)
!= null));
}
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