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Copy pathdirected_graph.js
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357 lines (331 loc) · 11.7 KB
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function DirectedGraphTracer(module) {
if (Tracer.call(this, module || DirectedGraphTracer)) {
DirectedGraphTracer.prototype.init.call(this);
return true;
}
return false;
}
DirectedGraphTracer.prototype = $.extend(true, Object.create(Tracer.prototype), {
constructor: DirectedGraphTracer,
init: function () {
var tracer = this;
this.s = this.capsule.s = new sigma({
renderer: {
container: this.$container[0],
type: 'canvas'
},
settings: {
minArrowSize: 8,
defaultEdgeType: 'arrow',
maxEdgeSize: 2.5,
labelThreshold: 4,
font: 'Roboto',
defaultLabelColor: '#fff',
zoomMin: 0.6,
zoomMax: 1.2,
skipErrors: true,
minNodeSize: .5,
maxNodeSize: 12,
labelSize: 'proportional',
labelSizeRatio: 1.3,
funcLabelsDef: function (node, context, settings) {
tracer.drawLabel(node, context, settings);
},
funcHoversDef: function (node, context, settings, next) {
tracer.drawOnHover(node, context, settings, next);
},
funcEdgesArrow: function (edge, source, target, context, settings) {
var color = tracer.getColor(edge, source, target, settings);
tracer.drawArrow(edge, source, target, color, context, settings);
}
}
});
sigma.plugins.dragNodes(this.s, this.s.renderers[0]);
this.graph = this.capsule.graph = this.s.graph;
},
_setTreeData: function (G, root) {
tm.pushStep(this.capsule, {type: 'setTreeData', arguments: arguments});
},
_visit: function (target, source) {
tm.pushStep(this.capsule, {type: 'visit', target: target, source: source});
},
_leave: function (target, source) {
tm.pushStep(this.capsule, {type: 'leave', target: target, source: source});
},
processStep: function (step, options) {
switch (step.type) {
case 'setTreeData':
this.setTreeData.apply(this, step.arguments);
break;
case 'visit':
case 'leave':
var visit = step.type == 'visit';
var targetNode = this.graph.nodes(this.n(step.target));
var color = visit ? this.color.visited : this.color.left;
targetNode.color = color;
if (step.source !== undefined) {
var edgeId = this.e(step.source, step.target);
var edge = this.graph.edges(edgeId);
edge.color = color;
this.graph.dropEdge(edgeId).addEdge(edge);
}
var source = step.source;
if (source === undefined) source = '';
break;
default:
Tracer.prototype.processStep.call(this, step, options);
}
},
setTreeData: function (G, root) {
var tracer = this;
root = root || 0;
var maxDepth = -1;
var chk = new Array(G.length);
var getDepth = function (node, depth) {
if (chk[node]) throw "the given graph is not a tree because it forms a circuit";
chk[node] = true;
if (maxDepth < depth) maxDepth = depth;
for (var i = 0; i < G[node].length; i++) {
if (G[node][i]) getDepth(i, depth + 1);
}
};
getDepth(root, 1);
if (this.setData.apply(this, arguments)) return true;
var place = function (node, x, y) {
var temp = tracer.graph.nodes(tracer.n(node));
temp.x = x;
temp.y = y;
};
var wgap = 1 / (maxDepth - 1);
var dfs = function (node, depth, top, bottom) {
place(node, depth * wgap, (top + bottom) / 2);
var children = 0;
for (var i = 0; i < G[node].length; i++) {
if (G[node][i]) children++;
}
var vgap = (bottom - top) / children;
var cnt = 0;
for (var i = 0; i < G[node].length; i++) {
if (G[node][i]) dfs(i, depth + 1, top + vgap * cnt, top + vgap * ++cnt);
}
};
dfs(root, 0, 0, 1);
this.refresh();
},
setData: function (G) {
if (Tracer.prototype.setData.apply(this, arguments)) return true;
this.graph.clear();
var nodes = [];
var edges = [];
var unitAngle = 2 * Math.PI / G.length;
var currentAngle = 0;
for (var i = 0; i < G.length; i++) {
currentAngle += unitAngle;
nodes.push({
id: this.n(i),
label: '' + i,
x: .5 + Math.sin(currentAngle) / 2,
y: .5 + Math.cos(currentAngle) / 2,
size: 1,
color: this.color.default
});
for (var j = 0; j < G[i].length; j++) {
if (G[i][j]) {
edges.push({
id: this.e(i, j),
source: this.n(i),
target: this.n(j),
color: this.color.default,
size: 1
});
}
}
}
this.graph.read({
nodes: nodes,
edges: edges
});
this.s.camera.goTo({
x: 0,
y: 0,
angle: 0,
ratio: 1
});
this.refresh();
return false;
},
resize: function () {
Tracer.prototype.resize.call(this);
this.s.renderers[0].resize();
this.refresh();
},
refresh: function () {
Tracer.prototype.refresh.call(this);
this.s.refresh();
},
clear: function () {
Tracer.prototype.clear.call(this);
this.clearGraphColor();
},
color: {
visited: '#f00',
left: '#000',
default: '#888'
},
clearGraphColor: function () {
var tracer = this;
this.graph.nodes().forEach(function (node) {
node.color = tracer.color.default;
});
this.graph.edges().forEach(function (edge) {
edge.color = tracer.color.default;
});
},
n: function (v) {
return 'n' + v;
},
e: function (v1, v2) {
return 'e' + v1 + '_' + v2;
},
getColor: function (edge, source, target, settings) {
var color = edge.color,
edgeColor = settings('edgeColor'),
defaultNodeColor = settings('defaultNodeColor'),
defaultEdgeColor = settings('defaultEdgeColor');
if (!color)
switch (edgeColor) {
case 'source':
color = source.color || defaultNodeColor;
break;
case 'target':
color = target.color || defaultNodeColor;
break;
default:
color = defaultEdgeColor;
break;
}
return color;
},
drawLabel: function (node, context, settings) {
var fontSize,
prefix = settings('prefix') || '',
size = node[prefix + 'size'];
if (size < settings('labelThreshold'))
return;
if (!node.label || typeof node.label !== 'string')
return;
fontSize = (settings('labelSize') === 'fixed') ?
settings('defaultLabelSize') :
settings('labelSizeRatio') * size;
context.font = (settings('fontStyle') ? settings('fontStyle') + ' ' : '') +
fontSize + 'px ' + settings('font');
context.fillStyle = (settings('labelColor') === 'node') ?
(node.color || settings('defaultNodeColor')) :
settings('defaultLabelColor');
context.textAlign = 'center';
context.fillText(
node.label,
Math.round(node[prefix + 'x']),
Math.round(node[prefix + 'y'] + fontSize / 3)
);
},
drawArrow: function (edge, source, target, color, context, settings) {
var prefix = settings('prefix') || '',
size = edge[prefix + 'size'] || 1,
tSize = target[prefix + 'size'],
sX = source[prefix + 'x'],
sY = source[prefix + 'y'],
tX = target[prefix + 'x'],
tY = target[prefix + 'y'],
angle = Math.atan2(tY - sY, tX - sX),
dist = 3;
sX += Math.sin(angle) * dist;
tX += Math.sin(angle) * dist;
sY += -Math.cos(angle) * dist;
tY += -Math.cos(angle) * dist;
var aSize = Math.max(size * 2.5, settings('minArrowSize')),
d = Math.sqrt(Math.pow(tX - sX, 2) + Math.pow(tY - sY, 2)),
aX = sX + (tX - sX) * (d - aSize - tSize) / d,
aY = sY + (tY - sY) * (d - aSize - tSize) / d,
vX = (tX - sX) * aSize / d,
vY = (tY - sY) * aSize / d;
context.strokeStyle = color;
context.lineWidth = size;
context.beginPath();
context.moveTo(sX, sY);
context.lineTo(
aX,
aY
);
context.stroke();
context.fillStyle = color;
context.beginPath();
context.moveTo(aX + vX, aY + vY);
context.lineTo(aX + vY * 0.6, aY - vX * 0.6);
context.lineTo(aX - vY * 0.6, aY + vX * 0.6);
context.lineTo(aX + vX, aY + vY);
context.closePath();
context.fill();
},
drawOnHover: function (node, context, settings, next) {
var tracer = this;
context.setLineDash([5, 5]);
var nodeIdx = node.id.substring(1);
this.graph.edges().forEach(function (edge) {
var ends = edge.id.substring(1).split("_");
if (ends[0] == nodeIdx) {
var color = '#0ff';
var source = node;
var target = tracer.graph.nodes('n' + ends[1]);
tracer.drawArrow(edge, source, target, color, context, settings);
if (next) next(edge, source, target, color, context, settings);
} else if (ends[1] == nodeIdx) {
var color = '#ff0';
var source = tracer.graph.nodes('n' + ends[0]);
var target = node;
tracer.drawArrow(edge, source, target, color, context, settings);
if (next) next(edge, source, target, color, context, settings);
}
});
}
});
var DirectedGraph = {
random: function (N, ratio) {
if (!N) N = 5;
if (!ratio) ratio = .3;
var G = new Array(N);
for (var i = 0; i < N; i++) {
G[i] = new Array(N);
for (var j = 0; j < N; j++) {
if (i != j) {
G[i][j] = (Math.random() * (1 / ratio) | 0) == 0 ? 1 : 0;
}
}
}
return G;
}
};
sigma.canvas.labels.def = function (node, context, settings) {
var func = settings('funcLabelsDef');
if (func) {
func(node, context, settings);
}
};
sigma.canvas.hovers.def = function (node, context, settings) {
var func = settings('funcHoversDef');
if (func) {
func(node, context, settings);
}
};
sigma.canvas.edges.def = function (edge, source, target, context, settings) {
var func = settings('funcEdgesDef');
if (func) {
func(edge, source, target, context, settings);
}
};
sigma.canvas.edges.arrow = function (edge, source, target, context, settings) {
var func = settings('funcEdgesArrow');
if (func) {
func(edge, source, target, context, settings);
}
};