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| // set up SVG for D3
var width = $(window).width() - 50,
height = $(window).height() - 50,
colors = d3.scale.category10();
var svg = d3.select('body')
.append('svg')
.attr('oncontextmenu', 'return false;')
.attr('width', width)
.attr('height', height);
// set up initial nodes and links
// - nodes are known by 'id', not by index in array.
// - reflexive edges are indicated on the node (as a bold black circle).
// - links are always source < target; edge directions are set by 'left' and 'right'.
var nodes = [
{id: "Concepteur", reflexive: false},
{id: "main", reflexive: false },
{id: "poigne", reflexive: false},
{id: "bois", reflexive: false},
{id: "metal", reflexive: false},
{id: "plastique", reflexive: false},
{id: "balayage", reflexive: false},
{id: "fibres végétales", reflexive: false},
{id: "fibres synthéthiques", reflexive: false},
{id: "Dépoussiérer", reflexive: false}
],
lastNodeId = 6,
links = [
{source: nodes[0], target: nodes[1], left: false, right: true },
{source: nodes[1], target: nodes[2], left: false, right: true },
{source: nodes[2], target: nodes[3], left: false, right: true },
{source: nodes[2], target: nodes[4], left: false, right: true },
{source: nodes[2], target: nodes[5], left: false, right: true },
{source: nodes[3], target: nodes[6], left: false, right: true },
{source: nodes[4], target: nodes[6], left: false, right: true },
{source: nodes[5], target: nodes[6], left: false, right: true },
{source: nodes[6], target: nodes[7], left: false, right: true },
{source: nodes[6], target: nodes[8], left: false, right: true },
{source: nodes[7], target: nodes[9], left: false, right: true },
{source: nodes[8], target: nodes[9], left: false, right: true }
];
// init D3 force layout
var force = d3.layout.force()
.nodes(nodes)
.links(links)
.size([width, height])
.linkDistance(50)
.charge(-2500)
.on('tick', tick);
// define arrow markers for graph links
svg.append('svg:defs').append('svg:marker')
.attr('id', 'end-arrow')
.attr('viewBox', '0 -5 10 10')
.attr('refX', 6)
.attr('markerWidth', 3)
.attr('markerHeight', 3)
.attr('orient', 'auto')
.append('svg:path')
.attr('d', 'M0,-5L10,0L0,5')
// arrow colors
.attr('fill', '#000');
svg.append('svg:defs').append('svg:marker')
.attr('id', 'start-arrow')
.attr('viewBox', '0 -5 10 10')
.attr('refX', 4)
.attr('markerWidth', 3)
.attr('markerHeight', 3)
.attr('orient', 'auto')
.append('svg:path')
.attr('d', 'M10,-5L0,0L10,5');
// line displayed when dragging new nodes
var drag_line = svg.append('svg:path')
.attr('class', 'link dragline hidden')
.attr('d', 'M0,0L0,0');
// handles to link and node element groups
var path = svg.append('svg:g').selectAll('path'),
circle = svg.append('svg:g').selectAll('g');
// mouse event vars
var selected_node = null,
selected_link = null,
mousedown_link = null,
mousedown_node = null,
mouseup_node = null;
// on node click.
function click(d) {
window.alert("toto");
}
// update force layout (called automatically each iteration)
function tick() {
// draw directed edges with proper padding from node centers
path.attr('d', function(d) {
var deltaX = d.target.x - d.source.x,
deltaY = d.target.y - d.source.y,
dist = Math.sqrt(deltaX * deltaX + deltaY * deltaY),
normX = deltaX / dist,
normY = deltaY / dist,
sourcePadding = d.left ? 17 : 12,
targetPadding = d.right ? 17 : 12,
sourceX = d.source.x + (sourcePadding * normX),
sourceY = d.source.y + (sourcePadding * normY),
targetX = d.target.x - (targetPadding * normX),
targetY = d.target.y - (targetPadding * normY);
return 'M' + sourceX + ',' + sourceY + 'L' + targetX + ',' + targetY;
});
circle.attr('transform', function(d) {
return 'translate(' + d.x + ',' + d.y + ')';
});
}
// update graph (called when needed)
function restart() {
// path (link) group
path = path.data(links);
// add new links
path.enter().append('svg:path')
.attr('class', 'link')
.classed('selected', function(d) { return d === selected_link; })
.style('marker-start', function(d) { return d.left ? 'url(#start-arrow)' : ''; })
.style('marker-end', function(d) { return d.right ? 'url(#end-arrow)' : ''; })
.on('mousedown', function(d) {
if(d3.event.ctrlKey) return;
// select link
mousedown_link = d;
if(mousedown_link === selected_link) selected_link = null;
else selected_link = mousedown_link;
selected_node = null;
restart();
});
// circle (node) group
// NB: the function arg is crucial here! nodes are known by id, not by index!
circle = circle.data(nodes, function(d) { return d.id; });
// update existing nodes (reflexive & selected visual states)
circle.selectAll('circle')
.style('fill', function(d) { return (d === selected_node) ? d3.rgb(colors(d.id)).brighter().toString() : colors(d.id); })
.classed('reflexive', function(d) { return d.reflexive; });
// add new nodes
var g = circle.enter().append('svg:g');
g.append('svg:circle')
.attr('class', 'node')
.attr('r', 12)
.style('fill', function(d) { return (d === selected_node) ? d3.rgb(colors(d.id)).brighter().toString() : colors(d.id); })
.style('stroke', function(d) { return d3.rgb(colors(d.id)).darker().toString(); })
.classed('reflexive', function(d) { return d.reflexive; })
.on('mouseover', function(d) {
if(!mousedown_node || d === mousedown_node) return;
// enlarge target node
d3.select(this).attr('transform', 'scale(1.1)');
})
.on('mouseout', function(d) {
if(!mousedown_node || d === mousedown_node) return;
// unenlarge target node
d3.select(this).attr('transform', '');
})
.on('mousedown', function(d) {
if(d3.event.ctrlKey) return;
// select node
mousedown_node = d;
if(mousedown_node === selected_node) selected_node = null;
else selected_node = mousedown_node;
selected_link = null;
// reposition drag line
drag_line
.style('marker-end', 'url(#end-arrow)')
.classed('hidden', false)
.attr('d', 'M' + mousedown_node.x + ',' + mousedown_node.y + 'L' + mousedown_node.x + ',' + mousedown_node.y);
restart();
})
.on('mouseup', function(d) {
if(!mousedown_node) return;
// needed by FF
drag_line
.classed('hidden', true)
.style('marker-end', '');
// check for drag-to-self
mouseup_node = d;
window.alert(mouseup_node.id);
// unenlarge target node
d3.select(this).attr('transform', '');
// add link to graph (update if exists)
// NB: links are strictly source < target; arrows separately specified by booleans
var source, target, direction;
if(mousedown_node.id < mouseup_node.id) {
source = mousedown_node;
target = mouseup_node;
direction = 'right';
} else {
source = mouseup_node;
target = mousedown_node;
direction = 'left';
}
var link;
link = links.filter(function(l) {
return (l.source === source && l.target === target);
})[0];
if(link) {
link[direction] = true;
} else {
link = {source: source, target: target, left: false, right: false};
link[direction] = true;
links.push(link);
}
// select new link
selected_link = link;
selected_node = null;
restart();
});
// show node IDs
g.append('svg:text')
.attr('x', 0)
.attr('y', 25)
.attr('class', 'id')
.text(function(d) { return d.id; });
// remove old nodes
circle.exit().remove();
// set the graph in motion
force.start();
}
// app starts here
restart(); |
