function displayDataviz(data){		
		console.log(data);
		let lane_array = [];
		let now = Date.now();

 		let earlier = now;

 		// ICI CACLCULER UNE HAUTEUR TOTAL EN FONCTION DU NOMBRE D'ACTIVISTE PAR LIGNE
    //height of items 10 
    let item_height = 15;
    //object pour la hauteur 
    // juste un array que je prendrai dans l'ordre des line
    const lineHeight_array = [];


		data.forEach(function(e){
		   lane_array.push(e)
		    if(e.start < earlier){
		   	 earlier = e.start;
		   }

		});
		let items_array = [];
		data.forEach(function(e){
			e.activist.forEach(function(d){
				items_array.push(d);
				if(d.start < earlier){
			   	 earlier = d.start;
			   }
			});
			if (e.activist.length*item_height > 50) {
				lineHeight_array.push(e.activist.length*item_height);
			}else{
				lineHeight_array.push(50);
			}
		});
		var lanes = lane_array,
		    laneLength = lanes.length,
				items = items_array;

		var t1 = new Date(earlier);
		var t2 = new Date(now);


		var timeBegin = earlier,
      		timeEnd = now ;
    
    



    //	
    	let pw = $(".post_content").width();
		var m = [20, 15, 15, 120], //top right bottom left
			w = pw - m[1] - m[3],
			h = sumArray(lineHeight_array) + (sumArray(lineHeight_array)/10) + 180,
			miniHeight = sumArray(lineHeight_array)/10 + 80,
			mainHeight = h - miniHeight - 40;

		//scales
		var x = d3.scaleLinear()
				.domain([timeBegin, timeEnd])
				.range([0, w]);
		var revert_x = d3.scaleLinear()
				.domain([0, w])
				.range([timeBegin, timeEnd]);
		var x1 = d3.scaleLinear()
				.range([0, w]);
		var y1 = d3.scaleLinear()
				.domain([0, laneLength])
				.range([0, mainHeight]);
		var y2 = d3.scaleLinear()
				.domain([0, laneLength])
				.range([0, miniHeight]);

		var chart = d3.select("#datavis")
					.append("svg")
					.attr("width", w + m[1] + m[3])
					.attr("height", h + m[0] + m[2])
					/*.attr("viewBox", '0 0 '+(h + m[0] + m[2])+' '+(w + m[1] + m[3])+'')*/
					.attr("class", "chart");
		
		chart.append("defs").append("clipPath")
			.attr("id", "clip")
			.append("rect")
			.attr("width", w)
			.attr("height", mainHeight);

		var main = chart.append("g")
					.attr("transform", "translate(" + m[3] + "," + m[0] + ")")
					.attr("width", w)
					.attr("height", mainHeight)
					.attr("class", "main");

					
		var mini = chart.append("g")
					.attr("transform", "translate(" + m[3] + "," + (mainHeight + m[0]+ 20) + ")")
					.attr("width", w-100)
					.attr("height", miniHeight)
					.attr("class", "mini");
		
		//main lanes and texts

		main.append("g").selectAll(".laneText")
			.data(lanes)
			.enter().append("text")
			.text(function(d) {return d.title;})
			.attr("x", -m[1])
			.attr("y", function(d, i) { if(d.lane == 0){ return lineHeight_array[i]/2}else{ return lineHeight_array[i]+sumArray(lineHeight_array, i-1)-lineHeight_array[i]/2};})
			.attr("dy", ".5ex")
			.attr("text-anchor", "end")
			.attr("class", "laneText");

		main.append("g").selectAll(".laneLines")
			.data(lanes)
			.enter().append("line")
			.attr("x1", m[1])
			.attr("y1", function(d,i) { if(d.lane == 0){ return lineHeight_array[i]}else{ return lineHeight_array[i]+sumArray(lineHeight_array, i-1)};})
			.attr("x2", w)
			.attr("y2", function(d,i) {if(d.lane == 0){return lineHeight_array[i]}else{return lineHeight_array[i]+sumArray(lineHeight_array, i-1)};})
			.attr("stroke", "black")
		

		const xaxis = d3.scaleLinear()
          .domain([timeBegin, timeEnd])
          .range([0, w]);

    mini.append("g")
        .attr("transform", "translate(0," + miniHeight + ")")
        .call(d3.axisBottom(xaxis).ticks(t2.getFullYear()-t1.getFullYear()).tickFormat(d3.timeFormat('%Y')))
        .selectAll("text")
        /*.attr("transform", "translate(-10,10)rotate(-45)")*/
        .style("text-anchor", "center")
        .style("font-size", 20)
        .style("fill", "black");



		// coalition 
		// adapt in display
    	/*var coa = main.append("g").selectAll("rect")
                  .data(lanes)
                  .enter().append("rect")
                  .attr("class", "coalition")
                  .attr("x", function(d) {var date = new Date(d.start);  return x(d.start);})
                  .attr("y", function(d) {return y1(d.lane) + 10;})
                  .attr("height", function(d) {return .8 * y1(1);})
                  .attr("width", function(d) { return x(d.end) - x(d.start);})
                  .attr("pos", function(d) {return d.lane });*/

		
		//mini lanes and texts
		mini.append("g").selectAll(".laneLines")
			.data(items)
			.enter().append("line")
			.attr("x1", m[1])
			.attr("y1", function(d) {return y2(d.lane);})
			.attr("x2", w)
			.attr("y2", function(d) {return y2(d.lane);})
			.attr("stroke", "lightgray");

		mini.append("g").selectAll(".laneText")
			.data(lanes)
			.enter().append("text")
			.text(function(d) {return d.title;})
			.attr("x", -m[1])
			.attr("y", function(d, i) {return y2(i + .5);})
			.attr("dy", ".5ex")
			.attr("text-anchor", "end")
			.attr("class", "laneText");

		var itemCoa = main.append("g").attr("clip-path", "url(#clip)");
		var itemCircles = main.append("g")
							.attr("clip-path", "url(#clip)");
		var itemRects = main.append("g")
							.attr("clip-path", "url(#clip)");
		
		var axisMain = main.append("g")
							.attr("clip-path", "url(#clip)");

		coa = mini.append("g").selectAll("rect")
                  .data(lanes)
                  .enter().append("rect")
                  .attr("class", "coalition")
                  .attr("x", function(d) { return x(d.start);})
                  .attr("y", function(d) {return y2(d.lane) + 2;})
                  .attr("height", function(d) {return .8 * y2(1);})
                  .attr("width", function(d) { return x(d.end) - x(d.start);})
                  .attr("pos", function(d) {return d.lane });
		
		//mini item rects
		mini.append("g").selectAll("miniItems")
			.data(items)
			.enter().append("rect")
			.attr("class", function(d) {return "markers";})
			.attr("x", function(d) {return x(d.start);})
			/*.attr("y", function(d, i) {let l1 = d.lane+1; let increments = (y2(l1)-y2(d.lane)) / (lanes[d.lane].activist.length)*i; return y2(d.lane)+increments;})*/
			.attr("y", function(d){ let idx = lanes[d.lane].activist.indexOf(d); let increments = y2(1) / (lanes[d.lane].activist.length)*idx; return y2(d.lane)+(increments) })
			.attr("width", function(d) {return x(d.end) - x(d.start);})
			.attr("height", 1);

		mini.append("g").selectAll("miniCircle")
			.data(items)
			.enter().append("circle")
			.attr("class", function(d) {return "markers";})
			.attr("cx", function(d) {return x(d.start);})
			/*.attr("y", function(d, i) {let l1 = d.lane+1; let increments = (y2(l1)-y2(d.lane)) / (lanes[d.lane].activist.length)*i; return y2(d.lane)+increments;})*/
			.attr("cy", function(d){ let idx = lanes[d.lane].activist.indexOf(d); let increments = y2(1) / (lanes[d.lane].activist.length)*idx; return y2(d.lane)+(increments) })
			.attr("r", 1);


		
		//mini labels
		/*mini.append("g").selectAll(".miniLabels")
			.data(items)
			.enter().append("text")
			.text(function(d) {return d.id;})
			.attr("x", function(d) {return x(d.start);})
			.attr("y", function(d, i) { let l1 = d.lane+1; let increments = (y2(l1)-y2(d.lane)) / (lanes[d.lane].activist.length)*i; return y2(d.lane)+increments;})
			.attr("dy", ".5ex");
*/

		// data interaction 
		$("body").on("mouseover", ".label_info", function(){
			let id = $(this).data("id");
			let elem = $("body").find('.miniItem[data-id="'+id+'"]');
			let c = $("body").find('.miniCircle[data-id="'+id+'"]');
			let y = parseFloat(elem.attr("y"))-10;
			elem.css({
				"y" :y,
				"height": "25px",
				"fill": 'black'
			});
			/*c.css({
				"r" : "13px",
				"fill": 'black'
			});*/
			$(this).css({
				"font" : "15px sans-serif",
				"fill": '#e94d1a'
			});
		});

		$("body").on("mouseleave", ".label_info", function(){
			let id = $(this).data("id");
			let elem = $("body").find('.miniItem[data-id="'+id+'"]');
			let c = $("body").find('.miniCircle[data-id="'+id+'"]');
			let y = parseFloat(elem.attr("y"));
			elem.css({
				"y" :y,
				"height" : "10px",
				"fill": '#e94d1a'
			});
			/*c.css({
				"r" : "5px",
				"fill": '#e94d1a'
			});*/
			$(this).css({
				"font" : "10px sans-serif",
				"fill": 'black'
			})
		});
		
		$("body").on("mouseover", ".miniItem", function(){
			let id = $(this).data("id");
			let elem = $("body").find('.label_info[data-id="'+id+'"]');
			let c = $("body").find('.miniCircle[data-id="'+id+'"]');
			let y = parseFloat($(this).attr("y"))-10;
			elem.css({
				"font" : "15px sans-serif",
				"fill": '#e94d1a'
			});
			/*c.css({
				"r" : "13px",
				"fill": 'black'
			});*/
			$(this).css({
				"y" :y,
				"height": "25px",
				"fill": 'black'
			});
		});

		$("body").on("mouseleave", ".miniItem", function(){
			let id = $(this).data("id");
			let elem = $("body").find('.label_info[data-id="'+id+'"]');
			let c = $("body").find('.miniCircle[data-id="'+id+'"]');
			let y = parseFloat($(this).attr("y"));
			elem.css({
				"font" : "10px sans-serif",
				"fill": 'black'
			});
			/*c.css({
				"r" : "5px",
				"fill": '#e94d1a'
			});*/
			$(this).css({
				"y" :y,
				"height" : "10px",
				"fill": '#e94d1a'
			})
		});
		
		// brush function
		/*const brush = d3.brushX().on('brush', handleBrush);


		initBrush();*/
		// mini.select(".brush")
		// 		.call(brush.extent([[0, 0], [w, miniHeight]]));
		 // Selecting SVG element
		/*mini.call(d3.brush().move, [[0, 0], [w, miniHeight]])*/
		/*function initBrush() {
		  mini.append("g")
		    .attr("class", "brush")
		    .call(brush.extent([[0, 0], [w, miniHeight]]));

		}*/
		// brush old 
		var brush = d3.brushX()
			          .on("brush", handleBrush)

		mini.append("g")
			.attr("class", "brush")
			.call(brush.extent([[0, 0], [w, miniHeight]]));

		handleBrush();
		
		function handleBrush() {

			var minExtent = d3.brushSelection(this) == null  ? 0 : d3.brushSelection(this)[0] ;
			var maxExtent = d3.brushSelection(this) == null  ? w : d3.brushSelection(this)[1] ;


			var rects, points, labels,
				visItems = items.filter(function(d) {return x(d.start) < maxExtent && x(d.end) > minExtent;});
				
				vislanes = lanes.filter(function(d) {return x(d.start) < maxExtent && x(d.end) > minExtent;});

				var checkable = [];
				visItems.forEach(function(e){ checkable.push(e.id)});
				vislanes.forEach(function(e){
				   e.activist.forEach(function(d){

						if(checkable.includes(d.id) == false){
								//console.log(d.id);
								const index = e.activist.indexOf(d);
								if (index == -1) { 
								  e.activist.splice(index, 1); 
								}
						}
					});

				});

				



		/*	*/

			x1.domain([revert_x(minExtent), revert_x(maxExtent)]);
			
			//update main item rects
			rects = itemRects.selectAll("rect")
			        .data(visItems, function(d) { return d.id; })
							.attr("x", function(d) {return x1(d.start);})
							.attr("width", function(d) {return x1(d.end) - x1(d.start);});
			
			rects.enter().append("rect")
				.attr("class", function(d) {return "miniItem";})
				.attr('data-id',function(d,i) {return i+'-'+d.lane+'_'+d.id;} )
				.attr('data-ref',function(d,i) {return d.pos+'_'+d.id.replace(/\s/g, '');} )
				.attr("x", function(d) {return x1(d.start);})
				.attr("y", function(d) { 
					let idx = lanes[d.lane].activist.indexOf(d);
					let increments = ( lineHeight_array[d.lane]-15) / (lanes[d.lane].activist.length)*idx; 


					return  sumArray(lineHeight_array, d.lane, true)+(increments)+7

				})
				.attr("width", function(d) {return x1(d.end) - x1(d.start);})
				.attr("height", function(d) {return 10;});


			rects.exit().remove();
			
			//axis
			const bigAxis = d3.scaleLinear()
          .domain([revert_x(minExtent), revert_x(maxExtent)])
          .range([0, w]);

      let t2 =new Date(revert_x(maxExtent));
      let t1 =new Date(revert_x(minExtent));
	  	axisMain.attr("transform", "translate(0," + (mainHeight - 50) +")")
	        .call(d3.axisBottom(bigAxis).ticks(t2.getFullYear()-t1.getFullYear()).tickFormat(d3.timeFormat('%Y')))
	        .selectAll("text")
	        /*.attr("transform", "translate(-10,10)rotate(-45)")*/
	        .style("text-anchor", "center")
	        .style("font-size", 20)
	        .style("fill", "black");
			
	    axisMain.exit().remove();


			//update the item labels
			labels = itemRects.selectAll("text")
				.data(visItems, function (d) { return d.id; })
				.attr("x", function(d) {return x1(Math.max(d.start, revert_x(minExtent) + 2))+10;});

			labels.enter().append("text")
				.text(function(d) {return d.id;})
				.attr('class', 'label_info')
				.attr('data-id',function(d,i) {return i+'-'+d.lane+'_'+d.id;} )
				.attr('data-ref',function(d,i) {return d.pos+'_'+d.id.replace(/\s/g, '');} )
				.attr("x", function(d) {return x1(Math.max(d.start, revert_x(minExtent)));})
				.attr("y", function(d) {
					let idx = lanes[d.lane].activist.indexOf(d);
					let increments = (lineHeight_array[d.lane]-15) / (lanes[d.lane].activist.length)*idx; 

					return sumArray(lineHeight_array, d.lane, true)+(increments)+15

				})
				.attr("text-anchor", "start");

			labels.exit().remove();
			//circles
			ccs = itemCircles.selectAll("circle")
			        .data(visItems, function(d) { return d.id; })
					.attr("cx", function(d) {return x1(Math.max(d.start, revert_x(minExtent)));});
							/*.attr("width", function(d) {return x1(d.end) - x1(d.start);});*/

			ccs.enter().append("circle")
				.attr("class", function(d) {return "miniCircle";})
				.attr('data-id',function(d,i) {return i+'-'+d.lane+'_'+d.id;} )
				.attr("cx", function(d) {return x1(Math.max(d.start, revert_x(minExtent)))-7;})
				.attr("cy", function(d) { 
					let idx = lanes[d.lane].activist.indexOf(d);
					let increments = (( lineHeight_array[d.lane] -15 ) / (lanes[d.lane].activist.length))*idx; 


					return  sumArray(lineHeight_array, d.lane, true)+(increments)+12

				})
				.attr("r", function(d,i) {
					let id = i+'-'+d.lane+'_'+d.id;
					let itemw = $("body").find('.miniItem[data-id="'+id+'"]').attr("width");
					let lbw = $("body").find('.label_info[data-id="'+id+'"]')[0].getBoundingClientRect().width;
					
					if (lbw > itemw && itemw < 8 ) {
						return 5;
					}else{
						return 0;
					}
					

				});
			ccs.exit().remove();
			//redraw coa lane 
			coa = itemCoa.selectAll("rect")
                  .data(lanes)
                  .attr("x", function(d) {return x1(d.start);})
									.attr("width", function(d) {return x1(d.end) - x1(d.start);});

      		coa.enter().append("rect")
         		 .attr("class", "coalition")
         		 .attr("x", function(d) {return x1(d.start);})
                 .attr("y", function(d, i ) {return sumArray(lineHeight_array, i, true)+5;})
                 .attr("height", function(d, i) {return lineHeight_array[i]-10;})
                 .attr("width", function(d) {return x1(d.end) - x1(d.start);})
                 .attr("pos", function(d) {return d.lane });

            coa.exit().remove();

            labelcoa = itemCoa.selectAll("text")
				.data(lanes)
				.attr("x", function(d) {return x1(Math.max(d.start, revert_x(minExtent)))+20;});


            labelcoa.enter().append("text")
            	.text(function(d) {return d.coa_name})
				.attr('class', 'coa_name')
				.attr('fill','white')
				.attr("y", function(d, i ) {return sumArray(lineHeight_array, i, true)+lineHeight_array[i]/2+10;})
				

			labelcoa.exit().remove();

		}

		function sumArray(array, to, strict){
			let s = 0;
			if (to == null) {
				array.forEach(function(e){
	 					s = s+e;
				});
			}else{
				if (strict == false || strict == null) {
				for (var i = 0; i <= to; i++) {
						s = s+array[i];
				}
			}else{
				for (var i = 0; i < to; i++) {
						s = s+array[i];
				}
			}
			}
			return s;
		}
		
}