No correct support for multiples yAxis

[ValentinH]

Highcharts allows to specify several yAxis for a given chart (a demo can be see here: http://www.highcharts.com/demo/combo-multi-axes).

However, this is not properly handle by highcharts-ng:

• multiple yAxis configuration can be passed as an array of axis to the configuration.
• BUT all the extremes (min/max) management is done expecting a single axis instead of a possible array.

For instance, this (link to source):

var processExtremes = function(chart, axis, axisName) {
      if(axis.currentMin || axis.currentMax) {
        chart[axisName][0].setExtremes(axis.currentMin, axis.currentMax, true);
      }
    };

sets only the first axe extremes provided axis is an Axis on not an Array of Axis.

Again, for the watch on config.yAxis, the code is:

angular.forEach(axisNames, function(axisName) {
          scope.$watch('config.' + axisName, function (newAxes, oldAxes) {
            if (newAxes === oldAxes) return;
            if(newAxes) {
              chart[axisName][0].update(newAxes, false);
              updateZoom(chart[axisName][0], angular.copy(newAxes));
              chart.redraw();
            }
          }, true);
        });

and for my opinion it should be something like this:

angular.forEach(axisNames, function(axisName) {
          scope.$watch('config.' + axisName, function (newAxes, oldAxes) {
            if (newAxes === oldAxes) return;
            if(newAxes) {
                if(newAxes instanceof Array) {
                    for(var axe_index in newAxes) {
                        var axe = newAxes[axe_index];
                        if(axe_index < chart[axisName].length) {
                            chart[axisName][axe_index].update(axe, false);
                            updateZoom(chart[axisName][axe_index], angular.copy(axe));
                        }
                    }
                }
                else {
                    chart[axisName][0].update(newAxes, false);
                    updateZoom(chart[axisName][0], angular.copy(newAxes));
                }
                chart.redraw();
            }
          }, true);
        });

What do you think? If this last suggestion is OK, I can make a pull request.

Thanks by advance,
Valentin

[pablojim]

Thanks for this. It looks looks generally good. Could you create a pull request and a few jsfiddles showing its use.

[xuye]

It has another situation like this:
I have three tab to display different data. Each tab has different number serie and yAxis. when i to switch tab to show chart. yAxis doesn't change.

use @ValentinH's method it just can solve multiples yAxis, but can't solve multiples tab with multiples yAxis. finally i use
angular.forEach(axisNames, function(axisName) {
scope.$watch('config.' + axisName, function (newAxes, oldAxes) {
if (newAxes === oldAxes) return;
if(oldAxes && axisName == 'yAxis'){
initChart();
}
if(newAxes) {
chart[axisName][0].update(newAxes, false);
updateZoom(chart[axisName][0], angular.copy(newAxes));
chart.redraw();
}
}, true);
to reinit chart. Thanks by advance

[ValentinH]

I think this is a different issue. You are giving a solution that works for your problem but that doesn't work anymore for multiple axis. Indeed, your code still uses chart[axisName][0] which means only the first axis is updated.

[xuye]

OK , thank you for your advise.

[moses-v51]

I have run into this as well, trying to manipulate a single y axis on a chart with multiple y axes. Have you made any progress on this?

[moses-v51]

Borrowing this JSFiddle (http://jsfiddle.net/ashwinp/J7LmP/4/) to illustrate that the application behaves the same regardless of the use of linkedTo - delete it and re-run and you will see the behavior remains.

[ValentinH]

The code I provided only handle the watch on multiple Y-Axis...

[moses-v51]

Understood, I wasn't sure if more had been done. Thanks for the quick reply.

[ValentinH]

What kind of manipulation do you wanna do? Cause I added a getter on the Highcharts object from which you can get each axis.

[moses-v51]

I am trying to add functionality to scroll and zoom axes of only some of the set of y axes in the chart.

[moses-v51]

I fixed my issue. The code that I thought was setting the y axis for each series was using an incorrect variable (copy/paste issue embarrassingly).

[seiyria]

So, is there an easy way to get this functionality? Should I fork and patch it in and use my fork?

[ValentinH]

The code I posted in this issue works well for handling multiple axis but I haven't submitted a pull request because some other parts deal with axis and I don't really understand these parts...

[linkedrank]

Was this ever addressed? I would also like to the use the multiple y-axis functionality

[cosme-benito]

The suggestion for the configuration of axes is not enough because it does not support creating/removing axis dynamically. I have done it like this:

  angular.forEach(axisNames, function(axisName) {
      scope.$watch('config.' + axisName, function(newAxes, oldAxes) {
        if (newAxes === oldAxes || !newAxes) {
          return;
        }

        if (angular.isArray(newAxes)) {

          for (var axisIndex = 0; axisIndex < newAxes.length; axisIndex++) {
            var axis = newAxes[axisIndex];

            if (axisIndex < chart[axisName].length) {
              chart[axisName][axisIndex].update(axis, false);
              updateZoom(chart[axisName][axisIndex], angular.copy(axis));
            }
            else {
              //Create axis if it does not exist: Cosme
              chart.addAxis(axis);
            }

            //Remove extra axis
            for (var axisIndex = newAxes.length; axisIndex < chart[axisName].length; axisIndex++) {
              chart[axisName][axisIndex].remove();
            }

          }

        } else {
          // update single axis
          chart[axisName][0].update(newAxes, false);
          updateZoom(chart[axisName][0], angular.copy(newAxes));

          //Remove extra axis
            for (var axisIndex = 1; axisIndex < chart[axisName].length; axisIndex++) {
              chart[axisName][axisIndex].remove();
            }

        }
        chart.redraw();
      }, true);
    });

This way at least supports creating/deleting axis. I am unsure of how to correct the processExtremes function, though.