slope.js

!function(){
	var bP={};
	var b=30, bb=150, height=600, buffMargin=1, minHeight=14;
	var c1=[-130, 40], c2=[-50, 100], c3=[-10, 140]; //Column positions of labels.
	//var colors =[ "#FF9900","#109618", "#990099", "#0099C6", "#DC3912"];
	//var colors =[ '#edbd00','#367d85', '#97ba4c', '#00ffbf', '#f5662b',"#00bfff",'#4000ff', "#7f00ff"];
	var colors =['#ffe5e5', '#ffcccc','#ffb3b3','#ff6666','#ff3333','#e60000','#990000','#660000	'];
	bP.partData = function(data,p, counts){
		var sData={};
		var allpeople = counts[1] + counts[2]

		sData.keys=[
			d3.set(data.map(function(d){ return d[0];})).values().sort(function(a,b){ return ( a<b? -1 : a>b ? 1 : 0);}),
			d3.set(data.map(function(d){ return d[1];})).values().sort(function(a,b){ return ( a<b? -1 : a>b ? 1 : 0);})
		];

		sData.data = [ sData.keys[0].map( function(d){ return sData.keys[1].map( function(v){ return 0; }); }),
						sData.keys[1].map( function(d){ return sData.keys[0].map( function(v){ return 0; }); })
		];

		data.forEach(function(d){
			sData.data[0][sData.keys[0].indexOf(d[0])][sData.keys[1].indexOf(d[1])]=d[p];
			sData.data[1][sData.keys[1].indexOf(d[1])][sData.keys[0].indexOf(d[0])]=d[p];
		});

		return sData;
	}

	function visualize(data){
		var vis ={};
		function calculatePosition(a, s, e, b, m){ //, total){

			var total= d3.sum(a);
			var sum=0, neededHeight=0, leftoverHeight= e-s-2*b*a.length;
			var ret =[];
      //var all = [197,197,197,197,197,107,107,107,107,107,107];
			a.forEach(
				function(d, i ){
					var v={};
					v.percent = (total == 0 ? 0 : d); ///all[i]);
					v.value=d;
					v.height=Math.max(v.percent*(e-s-2*b*a.length), m);
					(v.height==m ? leftoverHeight-=m : neededHeight+=v.height );
					ret.push(v);
				}
			);

			var scaleFact=leftoverHeight/Math.max(neededHeight,1), sum=0;

			ret.forEach(
				function(d, i){
					d.percent = scaleFact*d.percent;
					d.height=(d.height==m? m : d.height*scaleFact);
					d.middle=sum+b+d.height/2;
					d.y=s + d.middle - d.percent*(e-s-2*b*a.length)/2;
					d.h= d.percent*(e-s-2*b*a.length);
					d.percent = (total == 0 ? 0 : d.value/total);
					//d.percent = (total == 0 ? 0 : d.value/all[i]);
					sum+=2*b+d.height;
				}
			);
			return ret;
		}

		vis.mainBars = [
			calculatePosition( data.data[0].map(function(d){ return d3.sum(d);}), 0, height, buffMargin, minHeight),
			calculatePosition( data.data[1].map(function(d){ return d3.sum(d);}), 0, height, buffMargin, minHeight)
		];

		vis.subBars = [[],[]];
		vis.mainBars.forEach(function(pos,p){
			pos.forEach(function(bar, i){
				calculatePosition(data.data[p][i], bar.y, bar.y+bar.h, 0, 0).forEach(function(sBar,j){
					sBar.key1=(p==0 ? i : j);
					sBar.key2=(p==0 ? j : i);
					vis.subBars[p].push(sBar);
				});
			});
		});
		vis.subBars.forEach(function(sBar){
			sBar.sort(function(a,b){
				return (a.key1 < b.key1 ? -1 : a.key1 > b.key1 ?
						1 : a.key2 < b.key2 ? -1 : a.key2 > b.key2 ? 1: 0 )});
		});

		vis.edges = vis.subBars[0].map(function(p,i){
			return {
				key1: p.key1,
				key2: p.key2,
				y1:p.y,
				y2:vis.subBars[1][i].y,
				h1:p.h,
				h2:vis.subBars[1][i].h
			};
		});
		vis.keys=data.keys;
		return vis;
	}

	function arcTween(a) {
		var i = d3.interpolate(this._current, a);
		this._current = i(0);
		return function(t) {
			return edgePolygon(i(t));
		};
	}

	function drawPart(data, id, p){ // is is a second column
		d3.select("#"+id).append("g").attr("class","part"+p)
			.attr("transform","translate("+( p*(bb+b))+",0)");
		d3.select("#"+id).select(".part"+p).append("g").attr("class","subbars");
		d3.select("#"+id).select(".part"+p).append("g").attr("class","mainbars");

		var mainbar = d3.select("#"+id).select(".part"+p).select(".mainbars")
			.selectAll(".mainbar").data(data.mainBars[p])
			.enter().append("g").attr("class","mainbar");

		mainbar.append("rect").attr("class","mainrect")
			.attr("x", 0).attr("y",function(d){ return d.middle-d.height/2; })
			.attr("width",b).attr("height",function(d){ return d.height; })
			.style("shape-rendering","auto")
			.style("fill-opacity",0).style("stroke-width","0.5")
			.style("stroke","black").style("stroke-opacity",0);
    // Male / Female
		mainbar.append("text").attr("class","barlabel") // labels for quest and gender
			.attr("x", c1[p]).attr("y",function(d){ return d.middle+5;})
			.text(function(d,i){ return  data.keys[p][i] + "  ";})
			.attr("text-anchor","start" );

    // values to the right
		mainbar.append("text").attr("class","barvalue")
			.attr("x", c2[p]).attr("y",function(d){ return d.middle+5;})
			.text(function(d,i){ return  d.value ;})
			.attr("text-anchor","end");

		// percentages to the right
		mainbar.append("text").attr("class","barpercent") // percentages
			.attr("x", c3[p]).attr("y",function(d){ return d.middle+5;})
			.text(function(d,i){ return " ("+ Math.round(100*d.percent)+"%)" ;})
			.attr("text-anchor","end").style("fill","grey");

		d3.select("#"+id).select(".part"+p).select(".subbars")
			.selectAll(".subbar").data(data.subBars[p]).enter()
			.append("rect").attr("class","subbar")
			.attr("x", 0).attr("y",function(d){ return d.y})
			.attr("width",b).attr("height",function(d){ return d.h})
			.style("fill",function(d){ return colors[d.key1];});
	}

	function drawEdges(data, id){
		d3.select("#"+id).append("g").attr("class","edges").attr("transform","translate("+ b+",0)");

		d3.select("#"+id).select(".edges").selectAll(".edge")
			.data(data.edges).enter().append("polygon").attr("class","edge")
			.attr("points", edgePolygon).style("fill",function(d){ return colors[d.key1];})
			.style("opacity",0.5).each(function(d) { this._current = d; });
	}

	function drawHeader(header, id){
		d3.select("#"+id).append("g").attr("class","header").append("text").text(header[2]) //title
			.style("font-size","17px").attr("x",108).attr("y",-25).style("text-anchor","middle")
			.style("font-weight","bold");

		[0,1].forEach(function(d){
			var h = d3.select("#"+id).select(".part"+d).append("g").attr("class","header");

			h.append("text").text(header[d]).attr("x", (c1[d]-5))
				.attr("y", -5).style("fill","black");

			h.append("text").text("Count (%)").attr("x", (c2[d]-5))
				.attr("y", -5).style("fill","grey");

			h.append("line").attr("x1",c1[d]-10).attr("y1", 2) //-30 is margin to the left
				.attr("x2",c3[d]+ 16).attr("y2", 2).style("stroke",'#edbd00')
				.style("stroke-width","2").style("shape-rendering","crispEdges")
				.style("stroke-dasharray", ("4, 9"));
		});
	}

	function edgePolygon(d){
		return [0, d.y1, bb, d.y2, bb, d.y2+d.h2, 0, d.y1+d.h1].join(" ");
	}

	function transitionPart(data, id, p){
		var mainbar = d3.select("#"+id).select(".part"+p).select(".mainbars")
			.selectAll(".mainbar").data(data.mainBars[p]);

		mainbar.select(".mainrect").transition().duration(500)
			.attr("y",function(d){ return d.middle-d.height/2;})
			.attr("height",function(d){ return d.height;});

		mainbar.select(".barlabel").transition().duration(500)
			.attr("y",function(d){ return d.middle+5;});

		mainbar.select(".barvalue").transition().duration(500)
			.attr("y",function(d){ return d.middle+5;}).text(function(d,i){ return d.value ;});

		mainbar.select(".barpercent").transition().duration(500)
			.attr("y",function(d){ return d.middle+5;})
			.text(function(d,i){ return "( "+Math.round(100*d.percent)+"%)" ;});

		d3.select("#"+id).select(".part"+p).select(".subbars")
			.selectAll(".subbar").data(data.subBars[p])
			.transition().duration(500)
			.attr("y",function(d){ return d.y}).attr("height",function(d){ return d.h});
	}

	function transitionEdges(data, id){
		d3.select("#"+id).append("g").attr("class","edges")
			.attr("transform","translate("+ b+",0)");

		d3.select("#"+id).select(".edges").selectAll(".edge").data(data.edges)
			.transition().duration(500)
			.attrTween("points", arcTween)
			.style("opacity",function(d){ return (d.h1 ==0 || d.h2 == 0 ? 0 : 0.5);});
	}

	function transition(data, id){
		transitionPart(data, id, 0);
		transitionPart(data, id, 1);
		transitionEdges(data, id);
	}
  // MAIN FUNCTION
	bP.draw = function(data, svg){
		data.forEach(function(biP,s){
			svg.append("g")
				.attr("id", biP.id)
				.attr("transform","translate("+ (550*s)+",0)");

			var visData = visualize(biP.data);
			drawPart(visData, biP.id, 0); //draws the bar on the left
			drawPart(visData, biP.id, 1); //draws the bar on the right
			//drawPart(visData, biP.id, 2); // added third bar
			drawEdges(visData, biP.id); //draws the joining points
			drawHeader(biP.header, biP.id);

			[0,1].forEach(function(p){
				d3.select("#"+biP.id)
					.select(".part"+p)
					.select(".mainbars")
					.selectAll(".mainbar")
					.on("mouseover",function(d, i){ return bP.selectSegment(data, p, i); })
					.on("mouseout",function(d, i){ return bP.deSelectSegment(data, p, i); });
			});
		});
	}

	bP.selectSegment = function(data, m, s){
		data.forEach(function(k){
			var newdata =  {keys:[], data:[]};

			newdata.keys = k.data.keys.map( function(d){ return d;});

			newdata.data[m] = k.data.data[m].map( function(d){ return d;});

			newdata.data[1-m] = k.data.data[1-m]
				.map( function(v){ return v.map(function(d, i){ return (s==i ? d : 0);}); });

			transition(visualize(newdata), k.id);

			var selectedBar = d3.select("#"+k.id).select(".part"+m).select(".mainbars")
				.selectAll(".mainbar").filter(function(d,i){ return (i==s);});

		  // modify bar and labels upon selection
			selectedBar.select(".mainrect").style("stroke-opacity",5).style("stroke","white").style("fill", "green");
			//selectedBar.select(".barlabel").style('font-size', '22px');
			selectedBar.select(".barlabel").style('font-weight','bold').style('font-size', '11px');
			selectedBar.select(".barvalue").style('font-weight','bold').style('color','red');
			selectedBar.select(".barpercent").style('font-weight','bold');
		});
	}

	bP.deSelectSegment = function(data, m, s){
		data.forEach(function(k){
			transition(visualize(k.data), k.id);

			var selectedBar = d3.select("#"+k.id).select(".part"+m).select(".mainbars")
				.selectAll(".mainbar").filter(function(d,i){ return (i==s);});

			selectedBar.select(".mainrect").style("stroke-opacity",0);
			selectedBar.select(".barlabel").style('font-weight','normal');
			selectedBar.select(".barvalue").style('font-weight','normal');
			selectedBar.select(".barpercent").style('font-weight','normal');
		});
	}

	this.bP = bP;
}();