Adding interactive legend in d3.js for vijuly weighted tree -


i new d3,this may seem silly question using d3 . trying implement http://vizuly.io/product/weighted-tree/. trying make interactive legend filters tree when legend clicked. not able figure out tree data structure ,how pass viz object in legend ,how make filtering work.

i want collapse nodes except 1 legend have clicked.

function onclicklegend(g,d){      // filtering or collapsing node , corresponding branches legend clicked     switch(d)         {   	    case 0: viz.togglenode(data.values[0]); break;          case 1: viz.togglenode(data.values[1]); break;          case 2: viz.togglenode(data.values[2]); break;          case 3: viz.togglenode(data.values[3]); break;          case 4: viz.togglenode(data.values[4]); break;          case 5: viz.togglenode(data.values[5]); break;          case 6: viz.togglenode(data.values[6]); break;          case 7: viz.togglenode(data.values[7]); break;          case 8: viz.togglenode(data.values[8]); break;          case 9: viz.togglenode(data.values[9]); break;  		case 10: viz.togglenode(data.values[10]); break;  		case 11: viz.togglenode(data.values[11]); break;  		case 12: viz.togglenode(data.values[12]);break;           	      		}		        }


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