CODEWITHSUNDEEP
javascriptd3.js
batman
batman

Reputation: 3685

D3 directed graph nodes as rectangle

I'm very new to D3, I'm trying to draw an directed graph, but I want the nodes to be an rectangle instead of circle. Here is the code that I have tried:

<!DOCTYPE html>
<html>
<head>
    <meta charset='utf-8'>
    <title>Testing</title>
    <style>

.node {
    fill: #ccc;
    stroke: #fff;
    stroke-width: 2px;
}

.link {
    stroke: #777;
    stroke-width: 2px;
}

    </style>
</head>
<body>
    <script src='http://d3js.org/d3.v3.min.js'></script>
    <script>

var width = 640,
    height = 480;

var nodes = [
    { x:   width/3, y: height/2 , width:50,height:50 },
    { x: 2*width/3, y: height/2 ,width:50,height:50 },
    { x: 3*width/4, y: height/2 ,width:50,height:50 },
    { x: 6*width/5, y: height/2 ,width:50,height:50 }
];


var links = [
    { source: 0, target: 1 }
];

var svg = d3.select('body').append('svg')
    .attr('width', width)
    .attr('height', height);


var force = d3.layout.force()
    .size([width, height])
    .nodes(nodes)
    .links(links);


force.linkDistance(width/2);


var link = svg.selectAll('.link')
    .data(links)
    .enter().append('line')
    .attr('class', 'link');


var node = svg.selectAll('.node')
    .data(nodes)
    .enter().append('rect')
    .attr('class', 'node');

force.on('end', function() {

    node.attr('r', width/25)
        .attr('cx', function(d) { return d.x; })
        .attr('cy', function(d) { return d.y; });

    link.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; });

});


force.start();

    </script>
</body>
</html>

but the above code only displays the line, not rectangle, however if I change:

.enter().append('rect')

to 

.enter().append('circle')

things are working as expected. Where I'm making the mistake?

And also how can I make the arrow as directed one?

Thanks in advance.

Upvotes: 1

Views: 1403

Answers (3)

Pavel Gatnar
Pavel Gatnar

Reputation: 4053

you have to define rectangle attributes instead of circle attributes using node.attr, then it will be running correctly

for arrows use svg marker, see this example: http://bl.ocks.org/d3noob/5141278

Upvotes: 1

Ant&#39;s
Ant&#39;s

Reputation: 13811

Your doing it in-correctly, you should be doing this:

node.attr('x', function(d) { return d.x; })
    .attr('y', function(d) { return d.y; })
    .attr('width', function(d) { return d.width; })
    .attr('height', function(d) { return d.height; })

instead of circle properties.

Upvotes: 1

Alex_B
Alex_B

Reputation: 848

You need to the change the circle attributes for rectangle attributes like the following:

node.attr('x', function(d){ return d.x;})
    .attr('y', function(d){ return d.y;})
    .attr('width', width/25)
    .attr('height', width/25);

Hope this helps.

Upvotes: 0

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