negative values not handled

[wirlygig]

the charts do not handle negatives. when a negative value is entered it shows off grid. Is it possible to get the bar chart to also handle a negative value? Even when setting the starting value as a negative it does not render correct. The negative values should start at 0 and go down not start at -200 and go up. Now this is with scaleBeginAtZero: false, but with scaleBeginAtZero: true the negatives run down below the chart and cannot be seen.

Example:

var randomScalingFactor = function () { return Math.round(Math.random() * 100) };
var barChartData = {
labels: ["January", "February", "March", "April", "May", "June", "July"],
datasets: [
{
fillColor: "rgba(220,220,220,0.5)",
strokeColor: "rgba(220,220,220,0.8)",
highlightFill: "rgba(220,220,220,0.75)",
highlightStroke: "rgba(220,220,220,1)",
data: [-129, 52, 7, 42, 16, 0, 3]
},
{
fillColor: "rgba(151,187,205,0.5)",
strokeColor: "rgba(151,187,205,0.8)",
highlightFill: "rgba(151,187,205,0.75)",
highlightStroke: "rgba(151,187,205,1)",
data: [randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor()]
},
{
fillColor: "rgba(240,73,73,0.5)",
strokeColor: "rgba(240,73,73,0.8)",
highlightFill: "rgba(240,73,73,0.75)",
highlightStroke: "rgba(240,73,73,1)",
data: [randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor()]
}
]
};
window.onload = function () {
var ctx = document.getElementById("canvas").getContext("2d");
window.myBar = new Chart(ctx).StackedBar(barChartData, {
responsive: true, scaleBeginAtZero: false

});
};

[etimberg]

Closing as duplicate of #9