我正在尝试通过Laravel中的jqPlot插件显示一个饼图.Jqplot脚本与laravel mix一起编译到主app.js文件中。


我遇到的错误:


  jQuery.Deferred异常:无法读取属性'startAngle'的
  未定义TypeError:无法读取未定义的属性'startAngle'
  (在doDraw上)




doDraw函数(来自app.js):

function doDraw(rad) {
            // Fix for IE and Chrome that can't seem to draw circles correctly.
            // ang2 should always be <= 2 pi since that is the way the data is converted.
            // 2Pi = 6.2831853, Pi = 3.1415927
            if (ang2 > 6.282 + this.startAngle) {     **it fails on this if statement**
                ang2 = 6.282 + this.startAngle;
                if (ang1 > ang2) {
                    ang1 = 6.281 + this.startAngle;
                }
            }
            // Fix for IE, where it can't seem to handle 0 degree angles.  Also avoids
            // ugly line on unfilled pies.
            if (ang1 >= ang2) {
                return;
            }

            ctx.beginPath();
            ctx.fillStyle = color;
            ctx.strokeStyle = color;
            ctx.lineWidth = lineWidth;
            ctx.arc(0, 0, rad, ang1, ang2, false);
            ctx.lineTo(0, 0);
            ctx.closePath();

            if (fill) {
                ctx.fill();
            } else {
                ctx.stroke();
            }
        }


饼图的代码:

<div id="pie_seminar{{ $seminar->id }}" class="piechart"></div>

<script>
    var id, plot;
    $(document).ready(function () {
        id = '{{ $seminar->id }}';
        var plot{{ $seminar->id }} = $.jqplot('pie_seminar' + id, [[['Attempted',{{ $statisticResult['incomplete'] }}], ['Completed',{{ $statisticResult['completed'] }}]]], {
            gridPadding: {top: 1, right: 1, bottom: 1, left: 1},
            grid: {
                drawBorder: false,
                drawGridlines: false,
                background: '#ffffff',
                shadow: false
            },
            seriesDefaults: {
                renderer: $.jqplot.PieRenderer,

                rendererOptions: {
                    sliceMargin: 3,
                    // rotate the starting position of the pie around to 12 o'clock.
                    startAngle: -90,
                    showDataLabels: true,
                    diameter: null,
                    padding: 8,
                    margin: 1
                },
                trendline: {show: false}
            },
            legend: {
                show: false,
            },
            highlighter: {
                tooltipContentEditor: function (str, seriesIndex, pointIndex) {
                    return str;
                },
                show: false,
                useAxesFormatters: false,
                tooltipFormatString: '%s'
            },
            seriesColors: ["#cccccc", "#aaccff", "#F5811F"]
        });
    });
</script>


我设法通过手动将脚本导入公共文件夹来显示piechart插件(这不是解决方案,因为所有脚本都需要编译到一个文件中),因此表明代码应该可以。



使用laravel mix重新编译资产无法解决问题。代码不断落在startAngle未定义错误处。我对jqplot失去了理智。这是什么问题?

最佳答案

由于app.js中的已编译脚本属于doDraw函数(无法访问startAngle变量),因此修改doDraw函数即可完成任务。在doDraw函数中全局声明了startAngle变量,在刀片模板中也将startAngle声明为startAngle,以便可以为每个生成的jqPlot饼图全局访问该变量。当然,通过npm编译资产后,运行dev / production。

09-30 13:29