gallery/link-interaction.js

   1 /*global Gallery,Dygraph,data */
   2 Gallery.register(
   3   'link-interaction',
   4   {
   5     name: 'Link Interaction',
   6     setup: function(parent) {
   7       parent.innerHTML = [
   8           "<div id='div_g'></div>",
   9           "<b>Zoom:</b>",
  10           "<a href='#' id='hour'>hour</a> ",
  11           "<a href='#' id='day'>day</a> ",
  12           "<a href='#' id='week'>week</a> ",
  13           "<a href='#' id='month'>month</a> ",
  14           "<a href='#' id='full'>full</a> ",
  15           "<b>Pan:</b> ",
  16           "<a href='#' id='left'>left</a> ",
  17           "<a href='#' id='right'>right</a> "].join("\n");
  18     },
  19     run: function() {
  20       var r = [ ];
  21       var base_time = Date.parse("2008/07/01");
  22       var num = 24 * 0.25 * 365;
  23       for (var i = 0; i < num; i++) {
  24         r.push([ new Date(base_time + i * 3600 * 1000),
  25                  i + 50 * (i % 60),        // line
  26                  i * (num - i) * 4.0 / num  // parabola
  27                ]);
  28       }
  29       var orig_range = [ r[0][0].valueOf(), r[r.length - 1][0].valueOf() ];
  30       var g = new Dygraph(
  31             document.getElementById("div_g"),
  32             r, {
  33               rollPeriod: 7,
  34               animatedZooms: true,
  35               // errorBars: true,
  36               width: 600,
  37               height: 300,
  38               labels: ["Date", "a", "b"]
  39             }
  40           );
  41
  42       var desired_range = null, animate;
  43       function approach_range() {
  44         if (!desired_range) return;
  45         // go halfway there
  46         var range = g.xAxisRange();
  47         if (Math.abs(desired_range[0] - range[0]) < 60 &&
  48             Math.abs(desired_range[1] - range[1]) < 60) {
  49           g.updateOptions({dateWindow: desired_range});
  50           // (do not set another timeout.)
  51         } else {
  52           var new_range;
  53           new_range = [0.5 * (desired_range[0] + range[0]),
  54                        0.5 * (desired_range[1] + range[1])];
  55           g.updateOptions({dateWindow: new_range});
  56           animate();
  57         }
  58       }
  59       animate = function() {
  60         setTimeout(approach_range, 50);
  61       };
  62
  63       var zoom = function(res) {
  64         var w = g.xAxisRange();
  65         desired_range = [ w[0], w[0] + res * 1000 ];
  66         animate();
  67       };
  68
  69       var reset = function() {
  70         desired_range = orig_range;
  71         animate();
  72       };
  73
  74       var pan = function(dir) {
  75         var w = g.xAxisRange();
  76         var scale = w[1] - w[0];
  77         var amount = scale * 0.25 * dir;
  78         desired_range = [ w[0] + amount, w[1] + amount ];
  79         animate();
  80       };
  81
  82       document.getElementById('hour').onclick = function() { zoom(3600); };
  83       document.getElementById('day').onclick = function() { zoom(86400); };
  84       document.getElementById('week').onclick = function() { zoom(604800); };
  85       document.getElementById('month').onclick = function() { zoom(30 * 86400); };
  86       document.getElementById('full').onclick = function() { reset(); };
  87       document.getElementById('left').onclick = function() { pan(-1); };
  88       document.getElementById('right').onclick = function() { pan(+1); };
  89     }
  90   });