echart 状态区间图

这种图形在案例中有类似的http://echarts.baidu.com/demo.html#custom-profile，是根据这个来的

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function getviewbystation() {
    var myChart = echarts.init(document.getElementById('chartContent'));//加载图形的div
    var colors = ['#2EC7C9', '#D6737A'];//两种状态的颜色
    var state = ['正常', '故障'];//两种状态
 
    // echart配置
    var option = {
        color: colors,
        tooltip: {//提示框
            formatter: function (params) {
                return params.name + ':' + params.value[1] + '~' + params.value[2];
            }//数据的值
        },
        legend: {//图例
            data: state,
            bottom: '1%',
            selectedMode: false, // 图例设为不可点击
            textStyle: {
                color: '#000'
            }
        },
        grid: {//绘图网格
            left: '3%',
            right: '3%',
            top: '1%',
            bottom: '10%',
            containLabel: true
        },
        xAxis: {                    type: 'time',                    interval: 3600 * 12 * 1000,                    axisLabel: {                                               formatter: function (value) {                            var date = new Date(value);                            return getzf(date.getHours()) + ':' + getzf(date.getMinutes()) + '\n' + date.getDate() + '/' + (date.getMonth() + 1) + ' ';                            function getzf(num) {                                if (parseInt(num) < 10) {                                    num = '0' + num;                                }                                return num;                            }                        },                    }
        },
        yAxis: {
            data: ['监测站一', '监测站二', '监测站三']
        },
        series: [
            // 用空bar来显示四个图例
            { name: state[0], type: 'bar', data: [] },
            { name: state[1], type: 'bar', data: [] },
            {
                type: 'custom',                renderItem: function (params, api) {//开发者自定义的图形元素渲染逻辑，是通过书写 renderItem 函数实现的
                    var categoryIndex = api.value(0);//这里使用 api.value(0) 取出当前 dataItem 中第一个维度的数值。
                    var start = api.coord([api.value(1), categoryIndex]); // 这里使用 api.coord(...) 将数值在当前坐标系中转换成为屏幕上的点的像素值。
                    var end = api.coord([api.value(2), categoryIndex]);
                    var height = 24;//柱体宽度
 
                    return {
                        type: 'rect',// 表示这个图形元素是矩形。还可以是 'circle', 'sector', 'polygon' 等等。
                        shape: echarts.graphic.clipRectByRect({ // 矩形的位置和大小。
                            x: start[0],
                            y: start[1] - height / 2,
                            width: end[0] - start[0],
                            height: height
                        }, { // 当前坐标系的包围盒。
                            x: params.coordSys.x,
                            y: params.coordSys.y,
                            width: params.coordSys.width,
                            height: params.coordSys.height
                        }),
                        style: api.style()
                    };
                },
                encode: {
                    x: [1, 2], // data 中『维度1』和『维度2』对应到 X 轴
                    y: 0// data 中『维度0』对应到 Y 轴
                },
                data: [ // 维度0 维度1 维度2
                  {
                      itemStyle: { normal: { color: colors[0] } },//条形颜色
                      name: '正常',
                      value: [0, '2009/6/1 2:00', '2009/6/1 24:00']//0,1,2代表y轴的索引，后两位代表x轴数据开始和结束
                  },
                    {
                        itemStyle: { normal: { color: colors[1] } },
                        name: '故障',
                        value: [0, '2009/6/2 2:00', '2009/6/2 12:00']
                    },
                   {
                       itemStyle: { normal: { color: colors[0] } },
                       name: '正常',
                       value: [0, '2009/6/2 13:10', '2009/6/2 20:13']
                   },
                    {
                        itemStyle: { normal: { color: colors[1] } },
                        name: '故障',
                        value: [0, '2009/6/2 21:00', '2009/6/4 1:00']
                    },
                    {
                        itemStyle: { normal: { color: colors[0] } },
                        name: '正常',
                        value: [0, '2009/6/4 2:00', '2009/6/5 4:00']
                    },
                  {
                      itemStyle: { normal: { color: colors[0] } },
                      name: '正常',
                      value: [0, '2009/6/13 2:00', '2009/6/21 12:00']
                  },
                {
                    itemStyle: { normal: { color: colors[0] } },
                    name: '正常',
                    value: [1, '2009/6/1 2:00', '2009/6/13 22:00']
                },
                  {
                      itemStyle: { normal: { color: colors[1] } },
                      name: '故障',
                      value: [1, '2009/6/13 22:00', '2009/6/22 23:00']
                  },
                  {
                      itemStyle: { normal: { color: colors[1] } },
                      name: '故障',
                      value: [1, '2009/6/30 22:00', '2009/6/30 23:30']
                  },
                    {
                        itemStyle: { normal: { color: colors[1] } },
                        name: '故障',
                        value: [2, '2009/6/10 22:00', '2009/6/30 23:30']
                    },
                ]
            }
        ]
    };
    myChart.setOption(option);//引用
}