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forcegraph: convert to canvas

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This commit is contained in:
Nils Schneider 2015-04-10 20:47:11 +02:00
parent eb735c8c52
commit cc88109271
2 changed files with 194 additions and 157 deletions
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295
lib/forcegraph.js
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@ -1,7 +1,8 @@
define(["d3"], function (d3) {
return function (config, linkScale, sidebar, router) {
var self = this
var svg, vis, link, node, label
var svg, canvas, ctx
var svgNodes, svgLinks
var nodesDict, linksDict
var zoomBehavior
var force
@ -10,6 +11,8 @@ define(["d3"], function (d3) {
var intNodes = []
var intLinks = []
var highlight
var highlightedNodes = []
var highlightedLinks = []
var LINK_DISTANCE = 70
@ -57,23 +60,48 @@ define(["d3"], function (d3) {
.on("dragend", dragend)
function animatePanzoom(translate, scale) {
zoomBehavior.scale(scale)
zoomBehavior.translate(translate)
var translateP = zoomBehavior.translate()
var scaleP = zoomBehavior.scale()
var el = vis
if (!doAnimation) {
zoomBehavior.translate(translate)
zoomBehavior.scale(scale)
panzoom()
} else {
var start = {x: translateP[0], y: translateP[1], scale: scaleP}
var end = {x: translate[0], y: translate[1], scale: scale}
if (doAnimation)
el = el.transition().duration(500)
var interpolate = d3.interpolateObject(start, end)
var duration = 500
el.attr("transform", "translate(" + translate + ") " +
"scale(" + scale + ")")
var ease = d3.ease("cubic-in-out")
d3.timer(function (t) {
if (t >= duration)
return true
var v = interpolate(ease(t / duration))
zoomBehavior.translate([v.x, v.y])
zoomBehavior.scale(v.scale)
panzoom()
return false
})
}
}
function panzoom() {
var translate = zoomBehavior.translate()
var scale = zoomBehavior.scale()
vis.attr("transform", "translate(" + translate + ") " +
panzoomReal(translate, scale)
}
function panzoomReal(translate, scale) {
svg.attr("transform", "translate(" + translate + ") " +
"scale(" + scale + ")")
redraw()
}
function getSize() {
@ -105,15 +133,15 @@ define(["d3"], function (d3) {
}
function updateHighlight(nopanzoom) {
highlightedNodes = []
highlightedLinks = []
if (highlight !== undefined)
if (highlight.type === "node") {
var n = nodesDict[highlight.o.nodeinfo.node_id]
if (n) {
link.classed("highlight", false)
node.classed("highlight", function (e) {
return e.o.node === n.o.node && n.o.node !== undefined
})
highlightedNodes = [n]
if (!nopanzoom)
panzoomTo([n.x, n.y], [n.x, n.y])
@ -124,10 +152,7 @@ define(["d3"], function (d3) {
var l = linksDict[highlight.o.id]
if (l) {
node.classed("highlight", false)
link.classed("highlight", function (e) {
return e.o === l.o && l.o !== undefined
})
highlightedLinks = [l]
if (!nopanzoom) {
var x = d3.extent([l.source, l.target], function (d) { return d.x })
@ -139,129 +164,167 @@ define(["d3"], function (d3) {
return
}
node.classed("highlight", false)
link.classed("highlight", false)
if (!nopanzoom)
panzoomTo([0, 0], force.size())
}
function updateLinks(vis, data) {
var link = vis.selectAll("g.link")
.data(data, function (d) { return d.o.id })
var link = vis.selectAll("line")
.data(data, function (d) { return d.o.id })
link.exit().remove()
var linkEnter = link.enter().append("g")
.attr("class", "link")
.on("click", function (d) {
if (!d3.event.defaultPrevented)
router.link(d.o)()
})
linkEnter.append("line")
.append("title")
link.selectAll("line")
.style("stroke", function (d) { return linkScale(d.o.tq).hex() })
link.selectAll("title").text(function (d) { return showTq(d.o) })
link.enter().append("line")
.on("click", function (d) {
if (!d3.event.defaultPrevented)
router.link(d.o)()
})
return link
}
function updateNodes(vis, data) {
var node = vis.selectAll(".node")
var node = vis.selectAll("circle")
.data(data, function(d) { return d.o.id })
node.exit().remove()
node.enter().append("circle")
.attr("r", 8)
.attr("r", 12)
.on("click", function (d) {
if (!d3.event.defaultPrevented)
router.node(d.o.node)()
})
.call(draggableNode)
node.attr("class", function (d) {
var s = ["node"]
if (!d.o.node)
s.push("unknown")
return s.join(" ")
})
return node
}
function updateLabels(vis, data) {
var label = vis.selectAll("text")
.data(data, function(d) { return d.o.id })
function drawLabel(d) {
var sum = d.neighbours.reduce(function (a, b) {
return [a[0] + b.x, a[1] + b.y]
}, [0, 0])
label.exit().remove()
var sumCos = sum[0] - d.x * d.neighbours.length
var sumSin = sum[1] - d.y * d.neighbours.length
var labelEnter = label.enter().append("text")
var angle = Math.PI / 2
label.text(nodeName)
.each(function (d) {
var bbox = this.getBBox()
d.labelHeight = bbox.height
d.labelWidth = bbox.width
})
if (d.neighbours.length > 0)
angle = Math.PI + Math.atan2(sumSin, sumCos)
labelEnter.each(function (d) {
d.labelAngle = Math.PI / 2
})
var cos = Math.cos(angle)
var sin = Math.sin(angle)
return label
var x = d.x + d.labelA * Math.pow(Math.abs(cos), 2 / 5) * Math.sign(cos)
var y = d.y + d.labelB * Math.pow(Math.abs(sin), 2 / 5) * Math.sign(sin)
ctx.fillText(d.label, x, y)
}
function positionLabels() {
label.attr("transform", function(d) {
var neighbours = d.neighbours.map(function (n) {
var dx = n.x - d.x
var dy = n.y - d.y
function redraw() {
var translate = zoomBehavior.translate()
var scale = zoomBehavior.scale()
var nodes = intNodes.filter(function (d) { return d.o.node })
var unknownNodes = intNodes.filter(function (d) { return !d.o.node })
var links = intLinks
ctx.save()
ctx.font = "11px Roboto"
ctx.clearRect(0, 0, canvas.width, canvas.height)
ctx.translate(translate[0], translate[1])
ctx.scale(scale, scale)
return (2 * Math.PI + Math.atan2(dy, dx)) % (2 * Math.PI)
if (highlightedLinks.length) {
ctx.save()
ctx.lineWidth = 16
ctx.strokeStyle = "#FFD486"
highlightedLinks.forEach(function (d) {
ctx.beginPath()
ctx.moveTo(d.source.x, d.source.y)
ctx.lineTo(d.target.x, d.target.y)
ctx.stroke()
})
var sumCos = neighbours.reduce(function (a, b) {
return a + Math.cos(b)
}, 0)
ctx.restore()
}
var sumSin = neighbours.reduce(function (a, b) {
return a + Math.sin(b)
}, 0)
ctx.lineWidth = 2.5
if (neighbours.length > 0)
d.labelAngle = Math.PI + Math.atan2(sumSin, sumCos)
var offset = 10
var a = offset + d.labelWidth / 2
var b = offset + d.labelHeight / 2
var cos = Math.cos(d.labelAngle)
var sin = Math.sin(d.labelAngle)
var x = d.x + a * Math.pow(Math.abs(cos), 2 / 5) * Math.sign(cos)
var y = d.y + b * Math.pow(Math.abs(sin), 2 / 5) * Math.sign(sin)
return "translate(" + x + "," + y + ")"
links.forEach(function (d) {
ctx.beginPath()
ctx.moveTo(d.source.x, d.source.y)
ctx.lineTo(d.target.x, d.target.y)
ctx.strokeStyle = d.color
ctx.stroke()
})
ctx.textAlign = "center"
ctx.textBaseline = "middle"
ctx.fillStyle = "rgba(0, 0, 0, 0.6)"
intNodes.forEach(drawLabel)
ctx.beginPath()
unknownNodes.forEach(function (d) {
ctx.moveTo(d.x + 8, d.y)
ctx.arc(d.x, d.y, 8, 0, 2 * Math.PI)
})
ctx.strokeStyle = "#d00000"
ctx.fillStyle = "#ffffff"
ctx.fill()
ctx.stroke()
ctx.beginPath()
nodes.forEach(function (d) {
ctx.moveTo(d.x + 8, d.y)
ctx.arc(d.x, d.y, 8, 0, 2 * Math.PI)
})
ctx.strokeStyle = "#AEC7E8"
ctx.fillStyle = "#ffffff"
ctx.fill()
ctx.stroke()
if (highlightedNodes.length) {
ctx.save()
ctx.strokeStyle = "#FFD486"
ctx.fillStyle = "orange"
ctx.lineWidth = 6
highlightedNodes.forEach(function (d) {
ctx.beginPath()
ctx.moveTo(d.x + 8, d.y)
ctx.arc(d.x, d.y, 8, 0, 2 * Math.PI)
ctx.fill()
ctx.stroke()
})
ctx.restore()
}
ctx.restore()
}
function tickEvent() {
link.selectAll("line")
.attr("x1", function(d) { return d.source.x })
.attr("y1", function(d) { return d.source.y })
.attr("x2", function(d) { return d.target.x })
.attr("y2", function(d) { return d.target.y })
redraw()
node.attr("cx", function (d) { return d.x })
.attr("cy", function (d) { return d.y })
positionLabels()
svgLinks.attr("x1", function(d) { return d.source.x })
.attr("y1", function(d) { return d.source.y })
.attr("x2", function(d) { return d.target.x })
.attr("y2", function(d) { return d.target.y })
svgNodes.attr("cx", function (d) { return d.x })
.attr("cy", function (d) { return d.y })
}
function resizeCanvas() {
canvas.width = el.offsetWidth
canvas.height = el.offsetHeight
redraw()
}
el = document.createElement("div")
@ -273,15 +336,17 @@ define(["d3"], function (d3) {
.on("zoom", panzoom)
.translate([sidebar.getWidth(), 0])
canvas = d3.select(el).append("canvas").node()
svg = d3.select(el).append("svg")
.attr("pointer-events", "all")
.call(zoomBehavior)
.append("g")
vis = svg.append("g")
var visLinks = svg.append("g")
var visNodes = svg.append("g")
var visLinks = vis.append("g").attr("class", "links")
var visLabels = vis.append("g").attr("class", "labels")
var visNodes = vis.append("g").attr("class", "nodes")
ctx = canvas.getContext("2d")
force = d3.layout.force()
.charge(-80)
@ -294,6 +359,8 @@ define(["d3"], function (d3) {
.on("tick", tickEvent)
.on("end", savePositions)
window.addEventListener("resize", resizeCanvas)
panzoom()
self.setData = function (data) {
@ -339,6 +406,7 @@ define(["d3"], function (d3) {
e.o = d
e.source = newNodesDict[d.source.id]
e.target = newNodesDict[d.target.id]
e.color = linkScale(d.tq).hex()
return e
})
@ -351,6 +419,15 @@ define(["d3"], function (d3) {
if (d.o.node)
nodesDict[d.o.node.nodeinfo.node_id] = d
d.label = nodeName(d)
ctx.font = "11px Roboto"
var offset = 10
var width = ctx.measureText(d.label).width
d.labelA = offset + width / 2
d.labelB = offset + 11 / 2
})
intLinks.forEach(function (d) {
@ -367,9 +444,8 @@ define(["d3"], function (d3) {
})
})
link = updateLinks(visLinks, intLinks)
node = updateNodes(visNodes, intNodes)
label = updateLabels(visLabels, intNodes)
svgLinks = updateLinks(visLinks, intLinks)
svgNodes = updateNodes(visNodes, intNodes)
if (localStorageTest()) {
var save = JSON.parse(localStorage.getItem("graph/nodeposition"))
@ -380,7 +456,7 @@ define(["d3"], function (d3) {
nodePositions[d.id] = d
})
node.each( function (d) {
intNodes.forEach( function (d) {
if (nodePositions[d.o.id] && (d.x === undefined || d.y === undefined)) {
d.x = nodePositions[d.o.id].x
d.y = nodePositions[d.o.id].y
@ -397,8 +473,8 @@ define(["d3"], function (d3) {
updateHighlight(true)
if (node.enter().size() + link.enter().size() > 0)
force.start()
force.start()
resizeCanvas()
}
self.resetView = function () {
@ -421,14 +497,9 @@ define(["d3"], function (d3) {
self.destroy = function () {
force.stop()
node.remove()
link.remove()
svg.remove()
canvas.remove()
force = null
svg = null
vis = null
link = null
node = null
}
return self

56
scss/_forcegraph.scss
View file

@ -3,58 +3,24 @@
width: 100%;
background: url(img/gplaypattern.png);
svg {
canvas {
display: block;
width: 100%;
height: 100%;
}
.link {
stroke-opacity: 0.8;
svg {
display: block;
width: 100%;
height: 100%;
position: absolute;
top: 0;
left: 0;
line {
stroke-width: 2.5px;
circle, line {
opacity: 0;
stroke-width: 16px;
cursor: pointer;
}
&.highlight line {
stroke-width: 7px;
stroke-dasharray: 10, 10;
opacity: 1;
}
}
.node {
fill: #fff;
stroke-width: 2.5px;
stroke: #AEC7E8;
&:not(.unknown) {
cursor: pointer;
}
&.highlight {
stroke: #FFD486;
stroke-width: 6px;
fill: orange;
point-order: stroke;
}
&.unknown {
stroke: #d00000;
}
}
.labels {
text {
font-size: 7pt;
font-family: Roboto;
alignment-baseline: central;
text-anchor: middle;
fill: rgba(0, 0, 0, 0.6);
paint-order: stroke;
stroke-width: 3pt;
stroke: rgba(255, 255, 255, 0.5);
}
}
}