D3 Examples - d3.js: Mike Bostocks talk (2011/09) as gist (force layout with multiple foci examples)

xxxxxxxxxx
 
<!DOCTYPE html>
<!-- saved from url=(0047)https://mbostock.github.com/d3/talk/20110921/#15 -->
<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
​
    <title>D3.js</title>
    <script type="text/javascript" src="https://d3js.org/d3.v2.js"></script>
    <style type="text/css">
​
body {
  background: #000;
  position: relative;
  width: 1280px;
  height: 800px;
  margin: auto;
  overflow: hidden;
}
​
iframe {
  border: none;
  position: absolute;
  width: 1280px;
  height: 800px;
  background: #fff;
  -moz-transition-property: -moz-transform, opacity;
  -moz-transition-duration: 500ms;
  -webkit-transition-property: -webkit-transform, opacity;
  -webkit-transition-duration: 500ms;
}
​
#about {
  font: 14px "Helvetica Neue";
  position: absolute;
  width: 1280px;
  top: 840px;
}
​
#about, #about a {
  color: #fff;
}
​
#previous {
  opacity: 0;
  -moz-transform: translateX(-1300px);
  -webkit-transform: matrix3d(1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, -1300, 0, 0, 1);
}
​
#current {
  opacity: 1;
  -moz-transform: translateX(0);
  -webkit-transform: matrix3d(1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);
}
​
#next {
  opacity: 0;
  -moz-transform: translateX(1300px);
  -webkit-transform: matrix3d(1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 1300, 0, 0, 1);
}
​
    </style>
  </head>
  <body style="margin-top: 26.666666666666668px; ">
    <iframe id="previous" src="./foci.htm"></iframe>
    <iframe id="current" src="./more-foci.htm"></iframe>
    <iframe id="next" src="./link-foci.htm"></iframe>
    <div id="about">
​
Video: <a href="https://vimeo.com/29458354">https://vimeo.com/29458354</a><br>
Source: <a href="https://github.com/mbostock/d3">https://github.com/mbostock/d3</a>
​
    </div>
    <script type="text/javascript">
​
var slides = [
  "overview.html",
  "force.html",
  "patent-suits.html",
  "static.html",
  "momentum.html",
  "verlet.html",
  "negative-charge.html",
  "positive-charge.html",
  "gravity.html",
  "gravity-charge.html",
  "links.html",
  "relaxation.html",
  "ribbon.html",
  "transition.html",
  "foci.html",
  "more-foci.html",
  "link-foci.html",
  "medals.html",
  "states.html",
  "quantitative-foci.html",
  "tree.html",
  "parent-foci.html",
  "depth-foci.html",
  "collision.html",
  "bounding.html",
  "labels.html",
  "collapsible.html",
  "builder.html"
];
​
var previous = d3.select("#previous"),
    current = d3.select("#current"),
    next = d3.select("#next"),
    query = "?" + Date.now(),
    previousIndex,
    currentIndex = +location.hash.substring(1) || 0,
    nextIndex;
​
resize();
step(0);
​
d3.selectAll("iframe").on("load", function() {
  this.contentWindow.focus();
  d3.select(this.contentWindow).on("keydown", function() {
    switch (d3.event.keyCode) {
      case 39: // right arrow
      case 32: // space
      case 34: { // page down
        step(+1);
        break;
      }
      case 8: { // delete
        step(d3.event.shiftKey ? +1 : -1);
        break;
      }
      case 37: // left arrow
      case 33: { // page up
        step(-1);
        break;
      }
      case 36: { // home
        currentIndex = 0;
        step(0);
        break;
      }
      case 35: { // end
        currentIndex = slides.length - 1;
        step(0);
        break;
      }
      default: return;
    }
    d3.event.preventDefault();
  });
});
​
d3.select(window).on("resize", resize).on("hashchange", function hashchange() {
  var that = d3.select(this).on("hashchange", null);
  currentIndex = +location.hash.substring(1);
  step(0);
  that.on("hashchange", hashchange);
});
​
function resize() {
  d3.select("body").style("margin-top", (window.innerHeight - 800) / 3 + "px");
}
​
function step(delta) {
  if (delta > 0) {
    var temp = previous;
    previousIndex = currentIndex;
    previous = current.attr("id", "previous");
    currentIndex = nextIndex;
    current = next.attr("id", "current");
    nextIndex = nextIndex >= slides.length - 1 ? 0 : nextIndex + 1;
    next = temp.attr("id", "next");
  } else if (delta < 0) {
    var temp = next;
    nextIndex = currentIndex;
    next = current.attr("id", "next");
    currentIndex = previousIndex;
    current = previous.attr("id", "current");
    previousIndex = previousIndex <= 0 ? slides.length - 1 : previousIndex - 1;
    previous = temp.attr("id", "previous");
  } else {
    nextIndex = currentIndex >= slides.length - 1 ? 0 : currentIndex + 1;
    previousIndex = currentIndex <= 0 ? slides.length - 1 : currentIndex - 1;
  }
  previous.transition().delay(750).attr("src", slides[previousIndex] + query);
  current.transition().delay(250).attr("src", slides[currentIndex] + query);
  next.transition().delay(750).attr("src", slides[nextIndex] + query);
  location.hash = currentIndex;
}
​
    </script>
​
​
</body></html>
    