StackedAxis.js revision a75ebc38c1de401b679953a9b87bd323f0f48d02
/**
* StackedAxis manages stacked numeric data on an axis.
*
* @module charts
* @class StackedAxis
* @constructor
* @param {Object} config (optional) Configuration parameters for the Chart.
* @extends NumericAxis
*/
function StackedAxis(config)
{
StackedAxis.superclass.constructor.apply(this, arguments);
}
StackedAxis.NAME = "stackedAxis";
Y.extend(StackedAxis, Y.NumericAxis,
{
/**
* Calculates the maximum and minimum values for the `Axis`.
*
* @method _updateMinAndMax
* @private
*/
_updateMinAndMax: function()
{
var max = 0,
min = 0,
pos = 0,
neg = 0,
len = 0,
i = 0,
key,
num,
keys = this.get("keys");
for(key in keys)
{
if(keys.hasOwnProperty(key))
{
len = Math.max(len, keys[key].length);
}
}
for(; i < len; ++i)
{
pos = 0;
neg = 0;
for(key in keys)
{
if(keys.hasOwnProperty(key))
{
num = keys[key][i];
if(isNaN(num))
{
continue;
}
if(num >= 0)
{
pos += num;
}
else
{
neg += num;
}
}
}
if(pos > 0)
{
max = Math.max(max, pos);
}
else
{
max = Math.max(max, neg);
}
if(neg < 0)
{
min = Math.min(min, neg);
}
else
{
min = Math.min(min, pos);
}
}
this._roundMinAndMax(min, max);
}
});
Y.StackedAxis = StackedAxis;