LineChart. Custom LineChartRenderer does not cross chart border

[bizibizi]

I implemented custom LineChartRenderer by subclassing it. I use bold to as a custom highlighting. My issue is that first and last dots are cropped by the chart borders. Is it possible to fix that?

[Huang-Libo]

I have similar problem: my line chart is cropped on the top and bottom, this happens when I update to v3.0 with swift 3.0

top:

bottom:

[bizibizi]

thanks, but I need dots

[bizibizi]

Try this:

    let min = Double(Int(yValues.minElement()!) - 5)
    let max = Double(Int(yValues.maxElement()!) + 5)

    chartView.leftAxis.startAtZeroEnabled = false
    chartView.leftAxis.customAxisMax = max
    chartView.leftAxis.customAxisMin = min

[danielgindi]

If you want- you can make a PR with a feature to turn off clipping

[liuxuan30]

turn off clipping may have side effects showing additional dots. I tried to implement this but complicated than I first thought

[bizibizi]

I find out that to do it, I need to comment line:
CGContextClipToRect(context, _viewPortHandler.contentRect)

from BarLineChartViewBase class, public override func drawRect(rect: CGRect) method

[bizibizi]

but I can not cancel it.

CGContextClipToRect:
"This function sets the specified graphics context’s clipping region to the area which intersects both the current clipping path and the specified rectangle."

[bizibizi]

Well, here is my solution.

 class HighlightedDotLineChartRenderer: LineChartRenderer {

internal var _indicesToHighlight = [ChartHighlight]()

override func drawExtras(context context: CGContext) {
    super.drawExtras(context: context)

    drawHighlightedAfterClipping(context: context, indices: _indicesToHighlight)
}

override func drawHighlighted(context context: CGContext, indices: [ChartHighlight]) {
    _indicesToHighlight = indices
}

func drawHighlightedAfterClipping(context context: CGContext, indices: [ChartHighlight]) {
  ...custom drawing 
 } 

[gklka]

For later reference: chart.clipDataToContentEnabled = NO; solved me the same issue.