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d3 behavior.drag example
<!DOCTYPE html>
<html>
<head>
<title>Chernoff Smileys</title>
<script type="text/javascript" src="http://mbostock.github.com/d3/d3.js?2.5.0"></script>
<script type="text/javascript" src="http://mbostock.github.com/d3/d3.layout.js?2.5.0"></script>
<style type="text/css">
</style>
</head>
<body>
<p>Click a Smiley<p>
<script type="text/javascript">
var drag = d3.behavior.drag()
.on("drag", function(d,i) {
d.x += d3.event.dx
d.y += d3.event.dy
d3.select(this).attr("transform", function(d,i){
return "translate(" + [ d.x,d.y ] + ")"
})
});
function face_factory(classname, data, x, y, r)
{
//data format
//{ "x": 0 - 1 , "y": 0 -1, "z": 0-1 }
//color could be made a parameter
//var arc = d3.svg.arc().outerRadius(r)
//var donut = d3.layout.pie();
var face = d3.select("#charts")
.append("svg:g")
//.data([data.sort(d3.descending)])
//.data([data])
.data([ {"x":x, "y":y} ])
.attr("class", classname)
.attr("transform", "translate(" + x + "," + y + ")")
.call(drag);
console.log("make head");
var head_color = d3.scale.linear()
.domain([0, 1])
.interpolate(d3.interpolateRgb)
.range(["#ff0000", "#0000ff"]);
var head = face.append("svg:circle")
.attr("class", "head")
.attr("fill", function(d){ return head_color(data.x); })
.attr("fill-opacity", .8)
.attr("stroke", "#000")
.attr("stroke-width", 4)
.attr("r", r);
console.log("make mouth");
var mouth_x = [0, .5, 1];
var mouth_x_range = d3.scale.linear()
.domain([0, 1])
.range([-r/2, r/2]);
var mouth_y_range = d3.scale.linear()
.domain([0, 1])
.range([-r/2, r/2]);
var mouth_y = [.5, data.y, .5];
console.log(mouth_y)
var mouth_line = d3.svg.line()
.x(function(d,i) {
return mouth_x_range(mouth_x[i]);
})
.y(function(d,i) {
return mouth_y_range(mouth_y[i]);
})
.interpolate("basis");
/*
var mouth = face.append("svg:path")
.attr("class", "mouth")
.attr("stroke", "#000")
.attr("stroke-width", 4)
.attr("fill", "none")
.attr("transform", "translate(" + [0, r/3] + ")")
.attr("d", mouth_line(mouth_x));
*/
console.log("create eyes")
var eyer = r/10 + data.z * (r/3);
console.log(eyer);
var left_eye = face.append("svg:circle")
.attr("class", "eyes")
.attr("stroke", "#000")
.attr("fill", "none")
.attr("stroke-width", 4)
.attr("transform", "translate(" + [-r/2.5, -r/3] + ")")
.attr("r", eyer);
//eyer = r/10 + data.w * (r/3);
var right_eye = face.append("svg:circle")
.attr("class", "eyes")
.attr("stroke", "#000")
.attr("fill", "none")
.attr("stroke-width", 4)
.attr("transform", "translate(" + [r/2.5, -r/3] + ")")
.attr("r", eyer);
var text = face.append("svg:text")
.text("SMILE!")
.attr("y", ".5em")
.attr("transform", "translate(" + [0, r/3] + ")")
.attr("text-anchor", "middle")
.attr("font-weight", 700)
.attr("font-family", "Helvetica")
.attr("fill", "#ff0")
.attr("stroke", "none")
.attr("pointer-events", "none")
}
var w = 700;
var h = 400;
//setup svg canvas
d3.select("body")
.append("svg:svg")
.attr("width", w)
.attr("height", h)
.attr("id", "charts")
//.on("click", clickypie)
.append("svg:rect")
.attr("width", "100%")
.attr("height", "100%")
.attr("stroke", "#000")
.attr("stroke-width", 3)
.attr("fill", "none")
//r = 100;
for(i = 0; i < 20; i++)
{
var r = 20 + Math.random() * 50;
var data = { "x":Math.random(), "y":Math.random(), "z":Math.random(), "w":Math.random() };
x = Math.random() * w
y = Math.random() * h
face_factory("face"+i, data, x, y, r);
}
</script>
</body>
</html>
@gak

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gak commented Apr 2, 2012

:)

@alecklandgraf

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alecklandgraf commented Apr 13, 2013

👍

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