Question

有没有办法用Highcharts更改拖动的步长。例如，当我有大数值的数据（成千上万）时，拖动值并得到像4327这样的随机数是非常不干净的。我希望能够做的是将拖动值四舍五入到某个点根据y-scale的最大值，但我还没有弄清楚如何做到这一点。因此在这种情况下，拖动将从4300变为4400，而不是在中间获取随机数。这是一个JS小提琴，演示了拖动时我得到的不必要的数字：

jsFiddle

var planChart; 

$(function () {
planChart = {
    chart: {

        animation: false
    },
    title: {
        text: ''
    },
    xAxis: {
        categories: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun',
                'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'],
        crosshair: true,
    },
    yAxis: [{ // Primary yAxis
        labels: {
            format: '{value}',
            style: {
                color: '#20709e'
            }
        },
        title: {
            text: 'title',
            style: {
                color: '#20709e'
            }
        },
    }],

    plotOptions: {
        series: {
            point: {
                events: {

                    drag: function (e) {
                        // Returning false stops the drag and drops. Example:
                        /*
                        if (e.newY > 300) {
                            this.y = 300;
                            return false;
                        }
                        */


                    },
                    drop: function () {  }
                }
            },
            stickyTracking: false
        },
        column: {
            stacking: 'normal'
        },
        line: {
            cursor: 'ns-resize'
        }
    },

    tooltip: {
        shared: true
    },

    credits: {
        enabled: false
    },

    series: [{
        name: 'title',
        tooltip: {
            pointFormat: '<span style="color:{point.color}">\u25CF</span> <b> {point.y} </b><br/>'
        },
        data: [7042, 40494, 48204, 20383, 20938, 4803, 23903, 22, 23939, 13032, 1332, 93932],
        //draggableX: true,
        draggableY: true,
       dragMinY: 0,
        style: {
            color: '#20709e'
        }
    }]
}
$('.actualPlansPlot').highcharts(planChart);
 });

$(document).on('click', '#updateYScale', function(e) {
    var yValue = $('#newYValue')[0].value;
    planChart.yAxis[0].max = yValue;
    $('.actualPlansPlot').highcharts(planChart);
})

HTML

<script src="http://code.highcharts.com/highcharts.js"></script>
<script src="http://code.highcharts.com/modules/exporting.js"></script>
<script src="https://rawgithub.com/highslide-software/draggable-points/master/draggable-points.js?1"></script>
<div class="actualPlansPlot" style="min-width: 310px; height: 400px; margin: 0 auto"></div>
<input id="newYValue" type="number" />
<button id="updateYScale">Update Scale</button>

非常感谢任何帮助！

Answer 1

这个怎么样？

tooltip: {
     shared: true,
     formatter: function () {
           return  this.x + '<br/><b>' + Math.ceil(this.y/100)*100 + '</b>';
     }
},

JSFiddle

Answer 2

如果您需要更改某个点的值，则可以更改draggable-points插件的filterRange功能以过滤点值。例如。添加dragPrecision选项将更改返回的点值。

function filterRange(newY, series, XOrY) {
    var options = series.options,
        dragMin = pick(options['dragMin' + XOrY], undefined),
        dragMax = pick(options['dragMax' + XOrY], undefined),
        precision = pick(options['dragPrecision'], undefined);

    if(!isNaN(precision)) {
        newY = Math.round(newY / precision) * precision;
    }

    if (newY < dragMin) {
        newY = dragMin;
    } else if (newY > dragMax) {
        newY = dragMax;
    }
    return newY;
}

JSFiddle：http://jsfiddle.net/x8wbn5no/

其他方式，不需要编辑插件，就是通过包装Point.prototype.update功能来改变Highcharts中点更新的工作方式。

(function (H) {
    H.wrap(H.Point.prototype, 'update', function (proceed, options) {
        var filter = 100,
            filteredY = options && options.y;
        if(!isNaN(filteredY)) {
            arguments[1].y = Math.round(filteredY / filter) * filter;
        }
        // Run original proceed method
        proceed.apply(this, [].slice.call(arguments, 1));
    });
}(Highcharts));

JSFiddle：http://jsfiddle.net/sdvswdsw/

更改Highcharts Drag的步长？

2 个答案: