Rework ValueTextColor

app/src/main/kotlin/info/appdev/chartexample/CombinedChartActivity.kt

@@ -112,7 +112,7 @@ class CombinedChartActivity : DemoBase() {
         set.lineMode = LineDataSet.Mode.CUBIC_BEZIER
         set.isDrawValues = true
         set.valueTextSize = 10f
-        set.setSingleValueTextColor(Color.rgb(240, 238, 70))
+        set.valueTextColor = Color.rgb(240, 238, 70)
 
         set.axisDependency = YAxis.AxisDependency.LEFT
         d.addDataSet(set)
@@ -133,14 +133,14 @@ class CombinedChartActivity : DemoBase() {
 
         val set1 = BarDataSet(entries1, "Bar 1")
         set1.color = Color.rgb(60, 220, 78)
-        set1.setSingleValueTextColor(Color.rgb(60, 220, 78))
+        set1.valueTextColor = Color.rgb(60, 220, 78)
         set1.valueTextSize = 10f
         set1.axisDependency = YAxis.AxisDependency.LEFT
 
         val set2 = BarDataSet(entries2, "")
         set2.stackLabels = mutableListOf("Stack 1", "Stack 2")
         set2.setColors(Color.rgb(61, 165, 255), Color.rgb(23, 197, 255))
-        set2.setSingleValueTextColor(Color.rgb(61, 165, 255))
+        set2.valueTextColor = Color.rgb(61, 165, 255)
         set2.valueTextSize = 10f
         set2.axisDependency = YAxis.AxisDependency.LEFT
 
@@ -215,7 +215,7 @@ class CombinedChartActivity : DemoBase() {
         val set = BubbleDataSet(entries, "Bubble DataSet")
         set.setColors(*ColorTemplate.VORDIPLOM_COLORS)
         set.valueTextSize = 10f
-        set.setSingleValueTextColor(Color.WHITE)
+        set.valueTextColor = Color.WHITE
         set.highlightCircleWidth = 1.5f
         set.isDrawValues = true
         bd.addDataSet(set)

app/src/main/kotlin/info/appdev/chartexample/DynamicalAddingActivity.kt

@@ -127,7 +127,7 @@ class DynamicalAddingActivity : DemoBase(), OnChartValueSelectedListener {
             set.setCircleColor(color)
             set.highLightColor = color
             set.valueTextSize = 10f
-            set.setSingleValueTextColor(color)
+            set.valueTextColor = color
 
             data.addDataSet(set)
             data.notifyDataChanged()

app/src/main/kotlin/info/appdev/chartexample/LineChartTimeActivity.kt

@@ -126,7 +126,7 @@ class LineChartTimeActivity : DemoBase(), OnSeekBarChangeListener {
         val set1 = LineDataSet(values, "DataSet 1")
         set1.axisDependency = AxisDependency.LEFT
         set1.color = holoBlue
-        set1.setSingleValueTextColor(holoBlue)
+        set1.valueTextColor = holoBlue
         set1.lineWidth = 1.5f
         set1.isDrawCirclesEnabled = false
         set1.isDrawValues = false

app/src/main/kotlin/info/appdev/chartexample/RealtimeLineChartActivity.kt

@@ -122,7 +122,7 @@ class RealtimeLineChartActivity : DemoBase(), OnChartValueSelectedListener {
         set.fillAlpha = 65
         set.fillColor = ColorTemplate.holoBlue
         set.highLightColor = Color.rgb(244, 117, 117)
-        set.setSingleValueTextColor(Color.WHITE)
+        set.valueTextColor = Color.WHITE
         set.valueTextSize = 9f
         set.isDrawValues = false
         return set

app/src/main/kotlin/info/appdev/chartexample/fragments/SimpleFragment.kt

@@ -101,7 +101,7 @@ abstract class SimpleFragment : Fragment() {
         val ds1 = PieDataSet(entries1, "Quarterly Revenues 2015")
         ds1.setColors(*ColorTemplate.VORDIPLOM_COLORS)
         ds1.sliceSpace = 2f
-        ds1.setSingleValueTextColor(Color.WHITE)
+        ds1.valueTextColor = Color.WHITE
         ds1.valueTextSize = 12f
 
         val d = PieData(ds1)

chartLib/src/main/kotlin/info/appdev/charting/data/BaseDataSet.kt

@@ -266,19 +266,24 @@ abstract class BaseDataSet<T : Entry>() : IDataSet<T> {
         return mValueFormatter == null
     }
 
-    override fun setSingleValueTextColor(value: Int) {
-            mValueColors.clear()
-            mValueColors.add(value)
-    }
-
     override var valueTextColors: MutableList<Int>
         get() = mValueColors
         set(value) {
             mValueColors = value
         }
 
-    override fun getValueTextColor(index: Int): Int {
-        return mValueColors[index % mValueColors.size]
+    override var valueTextColor: Int
+        get() = if (mValueColors.isEmpty())
+            0
+        else
+            mValueColors[0]
+        set(value) {
+            mValueColors.clear()
+            mValueColors.add(value)
+        }
+
+    override fun getValueTextColor(value: Int): Int {
+        return mValueColors[value % mValueColors.size]
     }
 
     override var valueTypeface: Typeface?

chartLib/src/main/kotlin/info/appdev/charting/data/ChartData.kt

@@ -551,7 +551,7 @@ abstract class ChartData<T : IDataSet<out Entry>> : Serializable {
      */
     fun setValueTextColor(color: Int) {
         for (set in this.dataSets!!) {
-            set.setSingleValueTextColor(color)
+            set.valueTextColor = color
         }
     }
 

chartLib/src/main/kotlin/info/appdev/charting/interfaces/datasets/IDataSet.kt

@@ -225,11 +225,12 @@ interface IDataSet<T : Entry> {
      */
     fun needsFormatter(): Boolean
 
-    fun setSingleValueTextColor(value: Int)
     /**
      * Sets the color the value-labels of this DataSet should have.
      */
-    fun getValueTextColor(index: Int): Int
+    var valueTextColor: Int
+    // This getter is necessary because of the parameter value
+    fun getValueTextColor(value: Int): Int
 
     var valueTextColors: MutableList<Int>