Restored old performance (ChartsOrg#3216)

Temporary fix for calcMinMax frequency. Better implementation coming for Charts 4
kalmurzayev · Feb 26, 2018 · 3d98f1d · 3d98f1d
1 parent b71dd7b
commit 3d98f1d
Showing 1 changed file with 17 additions and 4 deletions.
diff --git a/Source/Charts/Data/Implementations/Standard/ChartDataSet.swift b/Source/Charts/Data/Implementations/Standard/ChartDataSet.swift
@@ -58,11 +58,19 @@ open class ChartDataSet: ChartBaseDataSet
     /// - note: Calls `notifyDataSetChanged()` after setting a new value.
     /// - returns: The array of y-values that this DataSet represents.
     /// the entries that this dataset represents / holds together
-    @objc open var values: [ChartDataEntry] {
-        didSet {
+    @objc open var values: [ChartDataEntry]
+        {
+        didSet
+        {
+            if isIndirectValuesCall {
+                isIndirectValuesCall = false
+                return
+            }
             notifyDataSetChanged()
         }
     }
+    // TODO: Temporary fix for performance. Will be removed in 4.0
+    private var isIndirectValuesCall = false
 
     /// maximum y-value in the value array
     internal var _yMax: Double = -Double.greatestFiniteMagnitude
@@ -386,7 +394,8 @@ open class ChartDataSet: ChartBaseDataSet
     open override func addEntry(_ e: ChartDataEntry) -> Bool
     {
         calcMinMax(entry: e)
-
+
+        isIndirectValuesCall = true
         values.append(e)
 
         return true
@@ -401,6 +410,7 @@ open class ChartDataSet: ChartBaseDataSet
     {
         calcMinMax(entry: e)
 
+        isIndirectValuesCall = true
         if values.count > 0 && values.last!.x > e.x
         {
             var closestIndex = entryIndex(x: e.x, closestToY: e.y, rounding: .up)
@@ -425,7 +435,8 @@ open class ChartDataSet: ChartBaseDataSet
     open override func removeEntry(_ entry: ChartDataEntry) -> Bool
     {
         var removed = false
-
+        isIndirectValuesCall = true
+
         for i in 0 ..< values.count
         {
             if values[i] === entry
@@ -436,6 +447,8 @@ open class ChartDataSet: ChartBaseDataSet
             }
         }
 
+        notifyDataSetChanged()
+
         return removed
     }