Creates an axis for AmAngularGauge charts, multiple can be assigned.

### Example

    var chart = AmCharts.makeChart("chartdiv",{
      ...
      "axes": [
        {
          "startValue": 0,
          "endValue": 100,
          "valueInterval": 10,
          "bands": [
            {
              "startValue": 0,
              "endValue": 100
            }
          ]
        }
      ]
    });

### Properties

Property | Type | Default | Description
--- | --- | --- | ---
axisAlpha | Number | 1 | Axis opacity.
axisColor | Color | #000000 | Axis color.
axisThickness | Number | 1 | Thickness of the axis outline.
bandAlpha | Number | 1 | Opacity of band fills.
bandGradientRatio | Array[Number] | [] | Example: [-0.2, 0, -0.2]. Will make bands to be filled with color gradients. Negative value means the color will be darker than the original, and positive number means the color will be lighter.
bandOutlineAlpha | Number | 0 | Opacity of band outlines.
bandOutlineColor | Color | #000000 | Color of band outlines.
bandOutlineThickness | Number | 0 | Thickness of band outlines.
bands | Array[GaugeBand] |  | Array of bands - GaugeBand objects. Bands are used to draw color fills between specified values.
bottomText | String |  | Text displayed below the axis center.
bottomTextBold | Boolean | true | Specifies if text should be bold.
bottomTextColor | Color |  | Bottom text color.
bottomTextFontSize | Number |  | Font size of bottom text.
bottomTextYOffset | Number | 0 | Y offset of bottom text.
centerX | Number/String | 0% | X position of the axis, relative to the center of the gauge.
centerY | Number/String | 0% | Y position of the axis, relative to the center of the gauge.
color | Color |  | Specifies labels color of the axis.
endAngle | Number | 120 | Axis end angle. Valid values are from - 180 to 180.
endValue | Number |  | Axis end (max) value
fontSize | Number |  | Font size for axis labels.
gridCount | Number | 5 | Number of grid lines. Note, GaugeAxis doesn't adjust gridCount, so you should check your values and choose a proper gridCount which would result grids at round numbers.
gridInside | Boolean | true | Specifies if grid should be drawn inside or outside the axis.
id | Number/String |  | Unique id of an axis.
inside | Boolean | true | Specifies if labels should be placed inside or outside the axis.
labelFrequency | Number | 1 | Frequency of labels.
labelFunction |  |  | You can use this function to format axis labels. This function is called and value is passed as a attribute: labelFunction(value);
labelOffset | Number | 15 | Distance from axis to the labels.
labelsEnabled | Boolean | true | Specifies if labels on the axis should be shown.
listeners | Array |  | You can add listeners of events using this property. Example: listeners = [{"event":"clickBand", "method":handleClick}];
minorTickInterval | Number |  | Interval, at which minor ticks should be placed.
minorTickLength | Number | 5 | Length of a minor tick.
radius | Number/String | 95% | Axis radius.
showFirstLabel | Boolean | true | Specifies if the first label should be shown.
showLastLabel | Boolean | true | Specifies if the last label should be shown.
startAngle | Number | -120 | Axis start angle. Valid values are from - 180 to 180.
startValue | Number | 0 | Axis start (min) value.
tickAlpha | Number | 1 | Opacity of axis ticks.
tickColor | Color | #555555 | Color of axis ticks.
tickLength | Number | 10 | Length of a major tick.
tickThickness | Number | 1 | Tick thickness.
topText | String |  | Text displayed above the axis center.
topTextBold | Boolean | true | Specifies if text should be bold.
topTextColor | Color |  | Color of top text.
topTextFontSize | Number |  | Font size of top text.
topTextYOffset | Number | 0 | Y offset of top text.
unit | String |  | A string which can be placed next to axis labels.
unitPosition | String | right | Position of the unit.
usePrefixes | Boolean | false | Specifies if small and big numbers should use prefixes to make them more readable.
valueInterval | Number |  | Interval, at which ticks with values should be placed.

### Methods

Name | Parameters | Returns | Description
--- | --- | --- | ---
addListener(type, handler) | type - string like 'clickBand' (should be listed in 'events' section of this class or classes which extend this class). handler - function which is called when event happens |  | Adds event listener to the object.
removeListener(chart, type, handler) | chart - chart object, type - event name, handler - method |  | Removes event listener from chart object.
setBottomText(text) | text - string |  | Sets bottom text.
setTopText(text) | text - string |  | Sets top text.
value2angle(value) | value - Number |  | Returns angle of the value.

### Events

Name | Event object | Description
--- | --- | ---
clickBand | {type: "clickBand", dataItem: GaugeBand, chart: AmAngularGauge, event: MouseEvent} | Event which is fired when user clicks on gauge band.
rollOutBand | {type: "rollOutBand", dataItem: GaugeBand, chart: AmAngularGauge, event: MouseEvent} | Event which is fired when user rolls-out gauge band.
rollOverBand | {type: "rollOverBand", dataItem: GaugeBand, chart: AmAngularGauge, event: MouseEvent} | Event which is fired when user rolls-over gauge band.