项目中应用到的框架和技术之三——echarts

echarts是效果丰富的图表库，当时考虑怎么炫怎么来就引入了这个库来做图表展示，官网：http://echarts.baidu.com

项目里用的比较浅，估且一看吧

代码：

    this.toChart = function () {

        var legendData = [];
        var xAxisLegend = [];
        var totalMJData = [];
        var totalXJData = [];

        var rows = this.cellList.length;
        for (var i = 0; i < rows; i++) {

            if (i < 7 && i != 1)
                continue;

            var cells = this.cellList[i];

            if (cells[0] == undefined && i != 1)
                continue;

            var curZQ;
            var mjData = [];
            var xjData = [];
            var cols = cells.length;
            for (var j = 0; j < cols; j++) {
                var cell = cells[j];
                if (undefined == cell) {
                    continue;
                }

                if (i == 1) {
                    legendData.push(cell.text);
                    totalMJData[legendData.length - 1] = [];
                    totalXJData[legendData.length - 1] = [];
                    continue;
                }

                if (j == 0)
                    curZQ = cell.text;

                if (j < 2)
                    continue;

                var value = 0.0;
                if (cell.text != "")
                    value = parseFloat(cell.text);

                var index = parseInt((j - 2) / 2);

                if (j % 2 == 0)
                    totalMJData[index][curZQ] = value;
                else
                    totalXJData[index][curZQ] = value;
            }

            if (i != 1)
                xAxisLegend.push(curZQ);
        }

        var seriesData = [];
        for (var i = 0; i < legendData.length; i++) {

            var legend = legendData[i];

            var mj = [];
            var xj = [];
            for (var j = 0; j < xAxisLegend.length; j++) {

                mj.push(totalMJData[i][xAxisLegend[j]]);
                xj.push(totalXJData[i][xAxisLegend[j]]);
            }
            var sMJ = {
                name: legend,
                type: 'bar',
                label: {
                    normal: {
                        show: true,
                        position: 'top'
                    }
                },
                stack: '面积',
                data: mj
            };
            seriesData.push(sMJ);
            var sXJ = {
                name: legend,
                type: 'bar',
                label: {
                    normal: {
                        show: true,
                        position: 'top'
                    }
                },
                stack: '蓄积',
                data: xj
            };
            seriesData.push(sXJ);
        }

        var myChart = echarts.init(document.getElementById('chart'));

        var options = {
            tooltip: {
                trigger: 'axis',
                axisPointer: {            // 坐标轴指示器，坐标轴触发有效
                    type: 'shadow'        // 默认为直线，可选为：'line' | 'shadow'
                }
            },
            legend: {
                data: legendData
            },
            grid: {
                left: '2%',
                right: '3%',
                bottom: '2%',
                containLabel: true
            },
            xAxis: [
                {
                    type: 'category',
                    data: xAxisLegend
                }
            ],
            yAxis: [
                {
                    type: 'value'
                }
            ],
            series: seriesData
        };
        myChart.setOption(options);
    }