Prova-Chart

Prova d'inclusió d'un gràfic que pugui servir copm a model de l'espai de relacions conceptuals:

{{Graph:<provarelacionsidees>}} _____________________________________________________________________________

{

 "version": 2,
 "width": 600,
 "height": 600,
 "padding": 5,
 "signals": [
   { "name": "rotation", "init": 0,
     "streams": [{
       "type": "click",
       "expr": "rotation + 6.14/180"
     }]
   }
 ],
 "data": [
   {
     "name": "tree",
     "url": "wikiraw:///Extension:Graph/data/flare-json",
     "format": {"type": "treejson"},
     "transform": [
       { "type": "hierarchy", "sort": "name", "size": [6.28, 300], "orient": "radial", "output": {"x": "angle1", "y": "radius"} },
       { "type": "formula", "field": "angle",   "expr": "(datum.angle1 + rotation) % (2*PI)" },
       { "type": "formula", "field": "sign",    "expr": "datum.angle > 3.14 ? 1 : -1" },
       { "type": "formula", "field": "degrees", "expr": "!datum.radius ? 0 : (datum.angle + datum.sign*1.57) * 180/PI" },
       { "type": "formula", "field": "yy",      "expr": "300 + datum.radius * cos(datum.angle)" },
       { "type": "formula", "field": "xx",      "expr": "300 + datum.radius * -sin(datum.angle)" },
       { "type": "formula", "field": "align",   "expr": "!datum.radius ? 'center' : datum.sign < 0 ? 'left' : 'right'" }
     ]
   }
 ],
 "marks": [
   {
     "type": "path",
     "from": {
       "data": "tree",
       "transform": [
         {"type": "filter", "test": "datum.parent"},
         {
           "type": "linkpath",
           "sourceX": "parent.xx", "sourceY": "parent.yy",
           "targetX": "xx", "targetY": "yy",
           "shape": "line"
         }
       ]
     },
     "properties": {
       "update": {
         "path": {"field": "layout_path"},
         "stroke": {"value": "#ddd"}
       }
     }
   },
   {
     "type": "text",
     "from": {"data": "tree"},
     "properties": {
       "update": {
         "x": {"field": "xx"},
         "y": {"field": "yy"},
         "font": {"value": "Helvetica Neue"},
         "fontSize": {"value": 10},
         "align": {"field": "align"},
         "baseline": {"value": "middle"},
         "fill": {"value": "#000"},
         "text": {"field": "name"},
         "angle": {"field": "degrees"}
       }
     }
   }
 ]

}