Set bar radius settings

ChartsDemo-iOS/Swift/Demos/BarChartViewController.swift

@@ -24,6 +24,9 @@ class BarChartViewController: DemoBaseViewController {
 
     override func viewDidLoad() {
         super.viewDidLoad()
+
+        chartView.barSettings = .init(rectCorner: [.topLeft, .topRight],
+                                      cornerRadii: CGSize(width: 4, height: 4))
 
         // Do any additional setup after loading the view.
         self.title = "Bar Chart"

Source/Charts/Charts/BarChartView.swift

@@ -11,6 +11,7 @@
 
 import Foundation
 import CoreGraphics
+import UIKit
 
 /// Chart that draws bars.
 open class BarChartView: BarLineChartViewBase, BarChartDataProvider
@@ -21,6 +22,8 @@ open class BarChartView: BarLineChartViewBase, BarChartDataProvider
     /// if set to true, a grey area is drawn behind each bar that indicates the maximum value
     private var _drawBarShadowEnabled = false
 
+    private var _barSettings = BarSettings(rectCorner: .allCorners, cornerRadii: .zero)
+
     internal override func initialize()
     {
         super.initialize()
@@ -183,4 +186,28 @@ open class BarChartView: BarLineChartViewBase, BarChartDataProvider
 
     /// `true` if drawing shadows (maxvalue) for each bar is enabled, `false` ifnot
     open var isDrawBarShadowEnabled: Bool { return drawBarShadowEnabled }
+
+    @objc open var barSettings: BarSettings
+    {
+        get { return _barSettings }
+        set
+        {
+            _barSettings = newValue
+            setNeedsDisplay()
+        }
+    }
+}
+
+extension BarChartView {
+
+    public class BarSettings: NSObject {
+        let rectCorner: UIRectCorner
+        let cornerRadii: CGSize
+
+        public init(rectCorner: UIRectCorner,
+             cornerRadii: CGSize) {
+            self.rectCorner = rectCorner
+            self.cornerRadii = cornerRadii
+        }
+    }
 }

Source/Charts/Charts/CombinedChartView.swift

@@ -15,6 +15,10 @@ import CoreGraphics
 /// This chart class allows the combination of lines, bars, scatter and candle data all displayed in one chart area.
 open class CombinedChartView: BarLineChartViewBase, CombinedChartDataProvider
 {
+    public var barSettings: BarChartView.BarSettings {
+        BarChartView.BarSettings(rectCorner: .allCorners, cornerRadii: CGSize(width: 0, height: 0))
+    }
+
     /// the fill-formatter used for determining the position of the fill-line
     internal var _fillFormatter: FillFormatter!
 

Source/Charts/Interfaces/BarChartDataProvider.swift

@@ -20,4 +20,5 @@ public protocol BarChartDataProvider: BarLineScatterCandleBubbleChartDataProvide
     var isDrawBarShadowEnabled: Bool { get }
     var isDrawValueAboveBarEnabled: Bool { get }
     var isHighlightFullBarEnabled: Bool { get }
-}
+    var barSettings: BarChartView.BarSettings { get }
+}

Source/Charts/Renderers/BarChartRenderer.swift

@@ -379,7 +379,12 @@ open class BarChartRenderer: BarLineScatterCandleBubbleRenderer
                 context.setFillColor(dataSet.color(atIndex: j).cgColor)
             }
 
-            context.fill(barRect)
+
+            let path = UIBezierPath(roundedRect: barRect,
+                                    byRoundingCorners: dataProvider.barSettings.rectCorner,
+                                    cornerRadii: dataProvider.barSettings.cornerRadii)
+            context.addPath(path.cgPath)
+            context.fillPath()
 
             if drawBorder
             {