Buffer size

Author: hannesa2

MPChartLib/src/main/java/com/github/mikephil/charting/buffer/AbstractBuffer.kt

@@ -5,14 +5,14 @@ package com.github.mikephil.charting.buffer
  *
  * @param <T> The data the buffer accepts to be fed with.
 </T> */
-abstract class AbstractBuffer<T> {
+abstract class AbstractBuffer<T>(size: Int) {
     /** index in the buffer  */
     @JvmField
     protected var index: Int = 0
 
     /** float-buffer that holds the data points to draw, order: x,y,x,y,...  */
     @JvmField
-    val buffer: MutableList<Float> = mutableListOf()
+    var buffer: MutableList<Float> = mutableListOf()
 
     /** animation phase x-axis  */
     @JvmField
@@ -30,6 +30,7 @@ abstract class AbstractBuffer<T> {
 
     init {
         index = 0
+        buffer = FloatArray(size).toMutableList()
     }
 
     /** limits the drawing on the x-axis  */

MPChartLib/src/main/java/com/github/mikephil/charting/buffer/BarBuffer.kt

@@ -3,7 +3,7 @@ package com.github.mikephil.charting.buffer
 import com.github.mikephil.charting.interfaces.datasets.IBarDataSet
 import kotlin.math.abs
 
-open class BarBuffer(dataSetCount: Int, containsStacks: Boolean) : AbstractBuffer<IBarDataSet?>() {
+open class BarBuffer(size: Int, dataSetCount: Int, containsStacks: Boolean) : AbstractBuffer<IBarDataSet?>(size) {
     protected var dataSetIndex: Int = 0
     protected var dataSetCount: Int = 1
 

MPChartLib/src/main/java/com/github/mikephil/charting/buffer/HorizontalBarBuffer.kt

@@ -3,7 +3,7 @@ package com.github.mikephil.charting.buffer
 import com.github.mikephil.charting.interfaces.datasets.IBarDataSet
 import kotlin.math.abs
 
-class HorizontalBarBuffer(size: Int, dataSetCount: Int, containsStacks: Boolean) : BarBuffer(dataSetCount, containsStacks) {
+class HorizontalBarBuffer(size: Int, dataSetCount: Int, containsStacks: Boolean) : BarBuffer(size, dataSetCount, containsStacks) {
     override fun feed(data: IBarDataSet?) {
         val size = (data?.entryCount ?: 0) * phaseX
         val barWidthHalf = barWidth / 2f

MPChartLib/src/main/java/com/github/mikephil/charting/renderer/BarChartRenderer.kt

@@ -59,10 +59,11 @@ open class BarChartRenderer(
         val barData = chart.barData
         barBuffers = mutableListOf()
 
-        barData.dataSets.forEach {
+        barData.dataSets.forEach { iBarDataSet ->
             barBuffers.add(
                 BarBuffer(
-                    barData.dataSetCount, it.isStacked
+                    iBarDataSet.entryCount * 4 * (if (iBarDataSet.isStacked) iBarDataSet.stackSize else 1),
+                    barData.dataSetCount, iBarDataSet.isStacked
                 )
             )
         }