[BUG] all-negative Stacked horizontal Bar Chart size is not correct

[liuxuan30]

Hi Daniel,
I have updated the code to today's latest, after you fixed some of the bugs, thanks for it.

If I use all negative values for stacked horizontal bar chart in demo code like:

    [yValues addObject:[[BarChartDataEntry alloc] initWithValues:@[ @-10, @-10 ] xIndex: 0]];
    [yValues addObject:[[BarChartDataEntry alloc] initWithValues:@[ @-12, @-13 ] xIndex: 1]];
    [yValues addObject:[[BarChartDataEntry alloc] initWithValues:@[ @-15, @-15 ] xIndex: 2]];
    [yValues addObject:[[BarChartDataEntry alloc] initWithValues:@[ @-17, @-17 ] xIndex: 3]];
    [yValues addObject:[[BarChartDataEntry alloc] initWithValues:@[ @-19, @-20 ] xIndex: 4]];
    [yValues addObject:[[BarChartDataEntry alloc] initWithValues:@[ @-19, @-19 ] xIndex: 5]];
    [yValues addObject:[[BarChartDataEntry alloc] initWithValues:@[ @-16, @-16 ] xIndex: 6]];
    [yValues addObject:[[BarChartDataEntry alloc] initWithValues:@[ @-13, @-14 ] xIndex: 7]];
    [yValues addObject:[[BarChartDataEntry alloc] initWithValues:@[ @-10, @-11 ] xIndex: 8]];
    [yValues addObject:[[BarChartDataEntry alloc] initWithValues:@[ @-5, @-6 ] xIndex: 9]];
    [yValues addObject:[[BarChartDataEntry alloc] initWithValues:@[ @-1, @-2 ] xIndex: 10]];

The size of the stack is out of bound, looks like the range is not calculated correctly; the negative range is still 21M, while it should be @-19 + @-20? check the screenshot:

[danielgindi]

Did you specify a custom range...?

[danielgindi]

The negative demo sets a custom axis range.

[liuxuan30]

I don't realize you have set

 _chartView.rightAxis.customAxisMax = 25.0;
 _chartView.rightAxis.customAxisMin = -25.0;

Comment it out, it works fine with the all negative values.

However, If I use the default demo code data, e.g. half negative half positive and comment out customAxisMin/Max code, the chart becomes weird... Can you try it on your side?

[liuxuan30]

I don't realize you have set

 _chartView.rightAxis.customAxisMax = 25.0;
 _chartView.rightAxis.customAxisMin = -25.0;

Comment it out, it works fine with the all negative values.

However, If I use the default demo code data, e.g. half negative half positive and comment out customAxisMin/Max code, the chart becomes weird... Can you try it on your side?

[liuxuan30]

This is the dataSet:

    [yValues addObject:[[BarChartDataEntry alloc] initWithValues:@[ @-10, @10 ] xIndex: 0]];
    [yValues addObject:[[BarChartDataEntry alloc] initWithValues:@[ @-12, @13 ] xIndex: 1]];
    [yValues addObject:[[BarChartDataEntry alloc] initWithValues:@[ @-15, @15 ] xIndex: 2]];
    [yValues addObject:[[BarChartDataEntry alloc] initWithValues:@[ @-17, @17 ] xIndex: 3]];
    [yValues addObject:[[BarChartDataEntry alloc] initWithValues:@[ @-19, @20 ] xIndex: 4]];
    [yValues addObject:[[BarChartDataEntry alloc] initWithValues:@[ @-19, @19 ] xIndex: 5]];
    [yValues addObject:[[BarChartDataEntry alloc] initWithValues:@[ @-16, @16 ] xIndex: 6]];
    [yValues addObject:[[BarChartDataEntry alloc] initWithValues:@[ @-13, @14 ] xIndex: 7]];
    [yValues addObject:[[BarChartDataEntry alloc] initWithValues:@[ @-10, @11 ] xIndex: 8]];
    [yValues addObject:[[BarChartDataEntry alloc] initWithValues:@[ @-5, @6 ] xIndex: 9]];
    [yValues addObject:[[BarChartDataEntry alloc] initWithValues:@[ @-1, @2 ] xIndex: 10]];

and make sure comment out

 _chartView.rightAxis.customAxisMax = 25.0;
 _chartView.rightAxis.customAxisMin = -25.0;

turn off startAtZeroEnabled:

_chartView.rightAxis.startAtZeroEnabled = NO;

Screenshot, looks like the rightAxis range is not correct, I surpose it is [-20,21], but it looks like [-0.1,1]:

[liuxuan30]

@danielgindi, looks like this issue has been fixed on 2.1.2?