d3-jetpack-transitioning-translate

d3-jetpack.js

(function() {
        
    function jetpack(d3) {
        d3.selection.prototype.translate = function(xy) {
            return this.attr('transform', function(d,i) {
                return 'translate('+[typeof xy == 'function' ? xy(d,i) : xy]+')';
            });
        };

        d3.transition.prototype.translate = function(xy) {
            return this.attr('transform', function(d,i) {
                return 'translate('+[typeof xy == 'function' ? xy(d,i) : xy]+')';
            });
        };

        d3.selection.prototype.tspans = function(lines, lh) {
            return this.selectAll('tspan')
                .data(lines)
                .enter()
                .append('tspan')
                .text(function(d) { return d; })
                .attr('x', 0)
                .attr('dy', lh || 15);
        };

        d3.selection.prototype.append = 
        d3.selection.enter.prototype.append = function(name) {
            var n = d3_parse_attributes(name), s;
            //console.log(name, n);
            name = n.attr ? n.tag : name;
            name = d3_selection_creator(name);
            s = this.select(function() {
                return this.appendChild(name.apply(this, arguments));
            });
            return n.attr ? s.attr(n.attr) : s;
        };

        d3.selection.prototype.insert = 
        d3.selection.enter.prototype.insert = function(name, before) {
            var n = d3_parse_attributes(name), s;
            name = n.attr ? n.tag : name;
            name = d3_selection_creator(name);
            before = d3_selection_selector(before);
            s = this.select(function() {
                return this.insertBefore(name.apply(this, arguments), before.apply(this, arguments) || null);
            });
            return n.attr ? s.attr(n.attr) : s;
        };

        var d3_parse_attributes_regex = /([\.#])/g;

        function d3_parse_attributes(name) {
            if (typeof name === "string") {
                var attr = {},
                    parts = name.split(d3_parse_attributes_regex), p;
                    name = parts.shift();
                while ((p = parts.shift())) {
                    if (p == '.') attr['class'] = attr['class'] ? attr['class'] + ' ' + parts.shift() : parts.shift();
                    else if (p == '#') attr.id = parts.shift();
                }
                return attr.id || attr['class'] ? { tag: name, attr: attr } : name;
            }
            return name;
        }

        function d3_selection_creator(name) {
            return typeof name === "function" ? name : (name = d3.ns.qualify(name)).local ? function() {
                return this.ownerDocument.createElementNS(name.space, name.local);
            } : function() {
                return this.ownerDocument.createElementNS(this.namespaceURI, name);
            };
        }

        function d3_selection_selector(selector) {
            return typeof selector === "function" ? selector : function() {
                return this.querySelector(selector);
            };
        }

        d3.wordwrap = function(line, maxCharactersPerLine) {
            var w = line.split(' '),
                lines = [],
                words = [],
                maxChars = maxCharactersPerLine || 40,
                l = 0;
            w.forEach(function(d) {
                if (l+d.length > maxChars) {
                    lines.push(words.join(' '));
                    words.length = 0;
                    l = 0;
                }
                l += d.length;
                words.push(d);
            });
            if (words.length) {
                lines.push(words.join(' '));
            }
            return lines;
        };
        
        d3.ascendingKey = function(key) {
            return typeof key == 'function' ? function (a, b) {
                  return key(a) < key(b) ? -1 : key(a) > key(b) ? 1 : key(a) >= key(b) ? 0 : NaN;
            } : function (a, b) {
                  return a[key] < b[key] ? -1 : a[key] > b[key] ? 1 : a[key] >= b[key] ? 0 : NaN;
            };
        };

        d3.descendingKey = function(key) {
            return typeof key == 'function' ? function (a, b) {
                return key(b) < key(a) ? -1 : key(b) > key(a) ? 1 : key(b) >= key(a) ? 0 : NaN;
            } : function (a, b) {
                return b[key] < a[key] ? -1 : b[key] > a[key] ? 1 : b[key] >= a[key] ? 0 : NaN;
            };
        };
    }

    if (typeof d3 === 'object' && d3.version) jetpack(d3);
    else if (typeof define === 'function' && define.amd) {
        define(['d3'], jetpack);
    }

})();

index.html

<!DOCTYPE html>
<meta charset="utf-8">

<style>
  body {
    width: 960px;
    height: 500px;
  }

  circle{
    fill-opacity: .5;
    stroke: black;
  }
</style>

<body></body>


<script src="http://d3js.org/d3.v3.min.js"></script>
<script src="d3-jetpack.js"></script>

<script>

var r = 15,
    width  = 960 - r*2,
    height = 500 - r*2

var svg = d3.select("body").append("svg")
    .attr("width",  width  + r*2)
    .attr("height", height + r*2)
  .append('g')
    .translate([r, r])


function drawCicle(pos){
  svg.append('circle')
      .attr('r', r)
      .datum([Math.random()*width, Math.random()*height])
      .translate(pos)
      .on('mouseover', drawCicle)
    .transition()
      .translate(function(d){ return d })
}

drawCicle([width/2, height/2])

</script>

preview.png

thumbnail.png