Improved lowestVisibleXIndex

[da-na]

Improved lowestVisibleXIndex so that the line chart does not ignore first x value and returns 0 for lowestVisibleXIndex instead of 1. Could be related to issue #785

Chart I'm using is of type LineChartView, the params setup for drawing:
chart.descriptionText = "weight (lbs)"
chart.legend.enabled = false
chart.minOffset = CGFloat(50)
chart.leftAxis.startAtZeroEnabled = false
chart.leftAxis.drawGridLinesEnabled = false
chart.rightAxis.enabled = true
chart.rightAxis.drawLabelsEnabled = false
chart.rightAxis.drawGridLinesEnabled = false
chart.xAxis.drawGridLinesEnabled = false
chart.autoScaleMinMaxEnabled = true
chart.drawBordersEnabled = true
chart.drawGridBackgroundEnabled = true

My Chart before the change:

It was not possible to scroll up or zoom out, to see the first point. It seemed to be drawn out of bounds.

After my fix:

[danielgindi]

@PhilJay are you aware of such an issue?

[PhilJay]

Absolutely not :-)
Which library version are you using?
I think it might be an older one because I see "startAtZero" in the code

[da-na]

Hi!
I'm using 2.2.1 (just checked in the Podfile.lock in my project), which was available in cocoaPods just about a month ago.

[liuxuan30]

not sure if it is the similar symptom with #713? seems both zoomed in and while scrolling, the dot is missing so the the line is broke?

[danielgindi]

Does the issue still exists with master?

[da-na]

@danielgindi Looks like it.

[danielgindi]

How can I reproduce this?