gallery/annotation.js

   1 Gallery.register(
   2   'annotations',
   3   {
   4     name: 'Annotations',
   5     title: 'Dynamic Annotations Demo',
   6     setup: function(parent) {
   7       parent.innerHTML =
   8           "<p>Click any point to add an annotation to it or click 'Add Annotation'.</p>" +
   9           "<input type='button' value='Add Annotation' onclick='add()' />" +
  10           "<input type='button' value='Shove to bottom' onclick='bottom(this)' />" +
  11           "<div id='list'></div>" +
  12           "<div id='g_div'></div>" +
  13           "<div id='events'></div>";
  14      },
  15
  16     run: function() {
  17       var eventDiv = document.getElementById("events");
  18       function nameAnnotation(ann) {
  19         return "(" + ann.series + ", " + ann.x + ")";
  20       }
  21
  22       g = new Dygraph(
  23               document.getElementById("g_div"),
  24               function() {
  25                 var zp = function(x) { if (x < 10) return "0"+x; else return x; };
  26                 var r = "date,parabola,line,another line,sine wave\n";
  27                 for (var i=1; i<=31; i++) {
  28                   r += "200610" + zp(i);
  29                   r += "," + 10*(i*(31-i));
  30                   r += "," + 10*(8*i);
  31                   r += "," + 10*(250 - 8*i);
  32                   r += "," + 10*(125 + 125 * Math.sin(0.3*i));
  33                   r += "\n";
  34                 }
  35                 return r;
  36               },
  37               {
  38                 rollPeriod: 1,
  39                 showRoller: true,
  40                 width: 480,
  41                 height: 320,
  42                 drawCallback: function(g) {
  43                   var ann = g.annotations();
  44                   var html = "";
  45                   for (var i = 0; i < ann.length; i++) {
  46                     var name = nameAnnotation(ann[i]);
  47                     html += "<span id='" + name + "'>"
  48                     html += name + ": " + (ann[i].shortText || '(icon)')
  49                     html += " -> " + ann[i].text + "</span><br/>";
  50                   }
  51                   document.getElementById("list").innerHTML = html;
  52             }
  53           }
  54           );
  55
  56       var last_ann = 0;
  57       annotations = [];
  58       for (var x = 10; x < 15; x += 2) {
  59         annotations.push( {
  60           series: 'sine wave',
  61           x: "200610" + x,
  62           shortText: x,
  63           text: 'Stock Market Crash ' + x
  64         } );
  65         last_ann = x;
  66       }
  67       annotations.push( {
  68         series: 'another line',
  69         x: "20061013",
  70         icon: 'images/dollar.png',
  71         width: 18,
  72         height: 23,
  73         tickHeight: 4,
  74         text: 'Another one',
  75         cssClass: 'annotation',
  76         clickHandler: function() {
  77           eventDiv.innerHTML += "special handler<br/>";
  78         }
  79       } );
  80       g.setAnnotations(annotations);
  81
  82       window.add = function() {
  83         var x = last_ann + 2;
  84         var annnotations = g.annotations();
  85         annotations.push( {
  86           series: 'line',
  87           x: "200610" + x,
  88           shortText: x,
  89           text: 'Line ' + x,
  90           tickHeight: 10
  91         } );
  92         last_ann = x;
  93         g.setAnnotations(annotations);
  94       }
  95
  96       window.bottom = function(el) {
  97         var to_bottom = true;
  98         if (el.value != 'Shove to bottom') to_bottom = false;
  99
 100         var anns = g.annotations();
 101         for (var i = 0; i < anns.length; i++) {
 102           anns[i].attachAtBottom = to_bottom;
 103         }
 104         g.setAnnotations(anns);
 105
 106         if (to_bottom) {
 107           el.value = 'Lift back up';
 108         } else {
 109           el.value = 'Shove to bottom';
 110         }
 111       }
 112
 113       var saveBg = '';
 114       var num = 0;
 115       g.updateOptions( {
 116         annotationClickHandler: function(ann, point, dg, event) {
 117           eventDiv.innerHTML += "click: " + nameAnnotation(ann) + "<br/>";
 118         },
 119         annotationDblClickHandler: function(ann, point, dg, event) {
 120           eventDiv.innerHTML += "dblclick: " + nameAnnotation(ann) + "<br/>";
 121         },
 122         annotationMouseOverHandler: function(ann, point, dg, event) {
 123           document.getElementById(nameAnnotation(ann)).style.fontWeight = 'bold';
 124           saveBg = ann.div.style.backgroundColor;
 125           ann.div.style.backgroundColor = '#ddd';
 126         },
 127         annotationMouseOutHandler: function(ann, point, dg, event) {
 128           document.getElementById(nameAnnotation(ann)).style.fontWeight = 'normal';
 129           ann.div.style.backgroundColor = saveBg;
 130         },
 131
 132         pointClickCallback: function(event, p) {
 133           // Check if the point is already annotated.
 134           if (p.annotation) return;
 135
 136           // If not, add one.
 137           var ann = {
 138             series: p.name,
 139             xval: p.xval,
 140             shortText: num,
 141             text: "Annotation #" + num
 142           };
 143           var anns = g.annotations();
 144           anns.push(ann);
 145           g.setAnnotations(anns);
 146
 147           num++;
 148         }
 149       });
 150     }
 151   });