javascript - Transitioning xAxis and data at the same time - D3.js -


i'm trying create sort of timeline chart using d3.js. i've got of control logic worked out data points aren't behaving expected move between pages. timeline shows 3 hour window of data collection lasting 1 week. user can click arrows @ left , right move forwards , backwards in 3 hour blocks.

as result of fetching next 3 hours worth of data on each click, expected exit() function contain of previous data points, because should leaving screen, doesn't seem happen. instead removes 5 of 10 points on first page. behaviour want not using exit() , manually forcing removal of points i'd rather understand why it's not working exit().

to complicate matters, data exits , enters chart transitioned in right left. @ same time transition domain bounds of xaxis give appearance of user moving forward in time. i'm starting suspect transition causing exit() function confused should , shouldn't on chart.

i've included section of code deals removal of elements exiting chart. let me know if other code snippets needed.

elements = svg.selectall('.news').data(data.items);  // remove                 var exitinglabels = elements.exit(),                     updatinglabels = elements,                     creatinglabels = elements.enter();                  console.log(exitinglabels.selectall('rect'));                 console.log(updatinglabels.selectall('rect'));                 console.log(creatinglabels);                  exitinglabels.selectall('circle')                     .transition()                     .duration(1500)                     .ease('sin-in-out')                     .attr('cx', function(d){return x($window.moment(d.date, 'yyyy-mm-ddthh:mm:ss.000z').clone().subtract(scope.zoomlevels[scope.zoomlevel].value, scope.zoomlevels[scope.zoomlevel].unit).format('x')) + 29;});                  exitinglabels.selectall('line')                     .transition()                     .duration(1500)                     .ease('sin-in-out')                     .attr('x1', function(d){return x($window.moment(d.date, 'yyyy-mm-ddthh:mm:ss.000z').clone().subtract(scope.zoomlevels[scope.zoomlevel].value, scope.zoomlevels[scope.zoomlevel].unit).format('x')) + 29;})                     .attr('x2', function(d){return x($window.moment(d.date, 'yyyy-mm-ddthh:mm:ss.000z').clone().subtract(scope.zoomlevels[scope.zoomlevel].value, scope.zoomlevels[scope.zoomlevel].unit).format('x')) + 29;});                  exitinglabels.selectall('rect')                     .transition()                     .duration(1500)                     .ease('sin-in-out')                     .attr('x', function(d){return x($window.moment(d.date, 'yyyy-mm-ddthh:mm:ss.000z').clone().subtract(scope.zoomlevels[scope.zoomlevel].value, scope.zoomlevels[scope.zoomlevel].unit).format('x'));});                  exitinglabels.selectall(function() { return this.getelementsbytagname('foreignobject'); })                     .transition()                     .duration(1500)                     .ease('sin-in-out')                     .attr('x', function(d){return x($window.moment(d.date, 'yyyy-mm-ddthh:mm:ss.000z').clone().subtract(scope.zoomlevels[scope.zoomlevel].value, scope.zoomlevels[scope.zoomlevel].unit).format('x'));});                  exitinglabels.transition()                     .delay(1600)                     .each('end', function(a){console.log(a);})                     .remove();

data.items result of async call fetch new data, code within callback of function.

you need specify key function .data(), otherwise match index. e.g. .data(data.items, function(d) { return d; }) match actual data.


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