Bar on BarChart and CombinedChart doesn't start one Zero line

[jndefosse]

Hello,

I use MPAndroidChart and Charts on my project. With Charts, when a use BarChart or CombinedChart with BarData, i show the ZeroLine with default parameter. When the chart is drawed, bars don't start at zero but before it. See the screenshot.

In MPAndroidChart, bars drawed correctly

Can you tell me how to fix it?

[gangarharsh]

Use
barChartView.leftAxis.axisMinimum = 0.0(Your minimum value)

[jndefosse]

The axisMinimum is setted to 0.0.

The Zero line is drawed at the top of AxisX and not on the AxisX.

Here an example where we see the AxisX and the Zero line. I will expect that there lines were the same line.

Here a second example where we see the graduation line for 0 with the Zero Line

Sorry for my English. It's hard to explain the problem

[liuxuan30]

@jndefosse I am a bit confused.. what's graduation line? Did you mean turn on leftAxis.drawZeroLineEnabled = YES;?
I looked at ChartsDemo line chart with leftAxis.drawZeroLineEnabled = YES;, it seems what are you saying?
But for you second screenshot, I totally don't understand

[liuxuan30]

OK just found the reason:
in drawZeroLine(), it draws one point lower, so the 0 axis line and zero line not overlap

        context.move(to: CGPoint(x: viewPortHandler.contentLeft, y: pos.y - 1.0))
        context.addLine(to: CGPoint(x: viewPortHandler.contentRight, y: pos.y - 1.0))
        context.drawPath(using: CGPathDrawingMode.stroke)

@jndefosse you can delete - 1.0 for you right now. I think it's on purpose to draw in such way.

@danielgindi do you remember why?

[danielgindi]

Yes, it was for correcting an Android rendering anomaly. On iOS it's not supposed to happen...

[jndefosse]

Thanks