D3.js日时热图动态更新

时间:2015-09-04 17:24:21

标签: javascript angularjs d3.js heatmap

我是D3.js的新手,我正在努力学习如何正确地把事情放在一起。我在这里有一个基于这个例子的日/小时热图:http://bl.ocks.org/tjdecke/5558084

我正在尝试编写updateHeatMap方法,以便我可以使用新数据动态更新热图。我一直在研究和研究,老实说,我没有找到一个成功的解决方案。任何帮助将不胜感激,下面的代码片段

我稍微改变了原来的日/小时热图示例,如下所示:

if ($http_x_forwarded_proto = 'http') {
    return 301 https://example.com$request_uri;
}

这是我到目前为止使用更新方法的内容。这不起作用,因为我不确定如何将更新的$ scope.heatMapData添加到新的heatMap变量中。我还需要更新图例以匹配新的色阶,但这是第二个优先级。

$scope.heatMapData = $http.get(...

$scope.initHeatMap = function() {

var margin = { top: 50, right: 0, bottom: 100, left: 30 },
      width = 960 - margin.left - margin.right,
      height = 430 - margin.top - margin.bottom,
      gridSize = Math.floor(width / 24),
      legendElementWidth = gridSize*2,
      buckets = 9,
      colors = ["#ffffd9","#edf8b1","#c7e9b4","#7fcdbb","#41b6c4","#1d91c0","#225ea8","#253494","#081d58"], // alternatively colorbrewer.YlGnBu[9]
      days = ["Mo", "Tu", "We", "Th", "Fr", "Sa", "Su"],
      times = ["1a", "2a", "3a", "4a", "5a", "6a", "7a", "8a", "9a", "10a", "11a", "12a", "1p", "2p", "3p", "4p", "5p", "6p", "7p", "8p", "9p", "10p", "11p", "12p"];



      $scope.colorScale = d3.scale.quantile()
          .domain([0, buckets - 1, d3.max($scope.heatMapData, function (d) { return d.value; })])
          .range(colors);

      var svg = d3.select("#chart").append("svg")
          .attr("width", width + margin.left + margin.right)
          .attr("height", height + margin.top + margin.bottom)
          .append("g")
          .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

      var dayLabels = svg.selectAll(".dayLabel")
          .data(days)
          .enter().append("text")
            .text(function (d) { return d; })
            .attr("x", 0)
            .attr("y", function (d, i) { return i * gridSize; })
            .style("text-anchor", "end")
            .attr("transform", "translate(-6," + gridSize / 1.5 + ")")
            .attr("class", function (d, i) { return ((i >= 0 && i <= 4) ? "dayLabel mono axis axis-workweek" : "dayLabel mono axis"); });

      var timeLabels = svg.selectAll(".timeLabel")
          .data(times)
          .enter().append("text")
            .text(function(d) { return d; })
            .attr("x", function(d, i) { return i * gridSize; })
            .attr("y", 0)
            .style("text-anchor", "middle")
            .attr("transform", "translate(" + gridSize / 2 + ", -6)")
            .attr("class", function(d, i) { return ((i >= 7 && i <= 16) ? "timeLabel mono axis axis-worktime" : "timeLabel mono axis"); });

      var heatMap = svg.selectAll(".hour")
          .data($scope.heatMapData)
          .enter().append("rect")
          .attr("x", function(d) { return (d.hour - 1) * gridSize; })
          .attr("y", function(d) { return (d.day - 1) * gridSize; })
          .attr("rx", 4)
          .attr("ry", 4)
          .attr("class", "hour bordered")
          .attr("width", gridSize)
          .attr("height", gridSize)
          .style("fill", colors[0]);

      heatMap.transition().duration(1000)
          .style("fill", function(d) { return $scope.colorScale(d.value); });

      heatMap.append("title").text(function(d) { return d.value; });

      var legend = svg.selectAll(".legend")
          .data([0].concat($scope.colorScale.quantiles()), function(d) { return d; })
          .enter().append("g")
          .attr("class", "legend");

      legend.append("rect")
        .attr("x", function(d, i) { return legendElementWidth * i; })
        .attr("y", height)
        .attr("width", legendElementWidth)
        .attr("height", gridSize / 2)
        .style("fill", function(d, i) { return colors[i]; });

      legend.append("text")
        .attr("class", "mono")
        .text(function(d) { return "≥ " + Math.round(d); })
        .attr("x", function(d, i) { return legendElementWidth * i; })
        .attr("y", height + gridSize);
  };

0 个答案:

没有答案