Chart.js雷达标签坐标 [英] Chart.js Radar Labels Coordinates

问题描述

有没有办法获得雷达图中标签的坐标？
我正在尝试在标签区域放置图片而不是文字。

is there any way to get the coordinates for the labels in the radar chart? I'm trying to put images instead of text in the labels area.

推荐答案

你可以用它来计算它规模财产。动画完成后，这些内容会在这些点上绘制一个蓝色圆圈。

You can calculate it using the scale property. Here is something that draws a blue circle at those points after the animation completes.

onAnimationComplete: function () {
    for (var i = 0; i < this.scale.valuesCount; i++) {
        // get the poitn position
        var pointLabelPosition = this.scale.getPointPosition(i, this.scale.calculateCenterOffset(this.scale.max) + 5);

        // draw a circle at that point
        this.chart.ctx.beginPath();
        this.chart.ctx.arc(pointLabelPosition.x, pointLabelPosition.y, 5, 0, 2 * Math.PI, false);
        this.chart.ctx.fillStyle = '#77e';
        this.chart.ctx.fill();
        this.chart.ctx.stroke();
    }
}

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小提琴 - http://jsfiddle.net/1jgmbyb7/

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