Highcharts Maps - Circular zoom controls

Currently implementing the Highcharts API for a special project. All features are functioning well except for one issue. I am looking to make the zoom in/out buttons appear rounded. I have attempted using border-radius with 50%, as well as modifying the r value on mapNavigation.buttonOptions.theme, but unfortunately, neither method proved successful.

I would really appreciate any guidance or assistance regarding this matter.

Answer №2

To customize the appearance of buttons in Highcharts, you can create your own SVG path by modifying the topbutton and bottombutton functions within

Highcharts.SVGRenderer.prototype.symbols
. Here is an example using circles:

(function(H) {
    function customRoundedRect(x, y, w, h, r) {
        var xStart = x + w / 2 - r,
            yStart = y + h / 2 - r;

        return [
            ['M', xStart, yStart],
            // top side
            ['A', r, r, 0, 0, 0, xStart + 2 * r, yStart + 2 * r],
            // top right corner
            ['A', r, r, 0, 0, 0, xStart, yStart]
        ];
    }
    H.SVGRenderer.prototype.symbols.topbutton = function(x, y, w, h, options) {
        var r = (options && options.r) || 0;
        return customRoundedRect(x - 1, y - 1, w, h, r);
    };
    H.SVGRenderer.prototype.symbols.bottombutton = function(x, y, w, h, options) {
        var r = (options && options.r) || 0;
        return customRoundedRect(x - 1, y - 1, w, h, r);
    };
}(Highcharts));

Check out a live demo: http://jsfiddle.net/BlackLabel/hwg9up7f/

For more information, refer to the documentation here: https://www.highcharts.com/docs/extending-highcharts/extending-highcharts

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