如何使用 highcharts.js 获得 x 轴和 y 轴末端的箭头？

Question

我想要像上图这样的箭头

Answer 1

您可以渲染自己的形状并将它们放置在轴线之上。渲染自定义形状可以通过 renderer.

实现

您还可以extend Highcharts改变负责渲染轴线的方法。

简化的扩展可能如下所示：

  Highcharts.wrap(Highcharts.Axis.prototype, 'getLinePath', function(p, lineWidth) {
var linePath = p.call(this, lineWidth);

if (this.options.arrowOnEnd) {
  var arrowFactor = 20,
    x,
    y,
    arrowPath,
    newPath;

  if (this.horiz) {
    x = linePath[4] = linePath[4] - arrowFactor;
    y = linePath[5];

    arrowPath = [
      'L', x - 0.35 * arrowFactor, y - 0.35 * arrowFactor,
      'L', x + 1 * arrowFactor, y,
      'L', x - 0.35 * arrowFactor, y + 0.35 * arrowFactor,
      'L', x, y
    ];
    newPath = linePath.concat(arrowPath);
  } else {
    x = linePath[1];
    y = linePath[2] = linePath[2]; // + arrowFactor;

    arrowPath = [
      'M', x, y,
      'L', x - 0.35 * arrowFactor, y + 0.35 * arrowFactor,
      'L', x, y - 1 * arrowFactor,
      'L', x + 0.35 * arrowFactor, y + 0.35 * arrowFactor,
      'L', x, y
    ];

    newPath = arrowPath.concat(linePath);
  }

  return newPath;
}

return linePath;
});

CSS 用于填充箭头：

.highcharts-axis-line {
  fill: black;
  stroke-linejoin: round;
}

示例：http://jsfiddle.net/z2aagpeu/

如何使用 highcharts.js 获得 x 轴和 y 轴末端的箭头？

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