add guard

ChartsOrg · Nov 6, 2017 · 83ed464 · 83ed464
1 parent 5037034
commit 83ed464
Showing 1 changed file with 4 additions and 4 deletions.
diff --git a/Source/Charts/Components/MarkerView.swift b/Source/Charts/Components/MarkerView.swift
@@ -25,9 +25,9 @@ open class MarkerView: NSUIView, IMarker
 
     open func offsetForDrawing(atPoint point: CGPoint) -> CGPoint
     {
-        var offset = self.offset
+        guard let chart = chartView else { return self.offset }
 
-        let chart = self.chartView
+        var offset = self.offset
 
         let width = self.bounds.size.width
         let height = self.bounds.size.height
@@ -36,7 +36,7 @@ open class MarkerView: NSUIView, IMarker
         {
             offset.x = -point.x
         }
-        else if let chart = chart, point.x + width + offset.x > chart.bounds.size.width
+        else if point.x + width + offset.x > chart.bounds.size.width
         {
             offset.x = chart.bounds.size.width - point.x - width
         }
@@ -45,7 +45,7 @@ open class MarkerView: NSUIView, IMarker
         {
             offset.y = -point.y
         }
-        else if let chart = chart, point.y + height + offset.y > chart.bounds.size.height
+        else if point.y + height + offset.y > chart.bounds.size.height
         {
             offset.y = chart.bounds.size.height - point.y - height
         }