Kotlin color template

MPChartLib/src/main/java/com/github/mikephil/charting/data/LineDataSet.kt

@@ -29,7 +29,7 @@ open class LineDataSet(yVals: MutableList<Entry>?, label: String = "") : LineRad
     /**
      * List representing all colors that are used for the circles
      */
-    var circleColors: MutableList<Int?>? = null
+    var circleColors: MutableList<Int>? = null
 
     /**
      * the color of the inner circles
@@ -73,7 +73,7 @@ open class LineDataSet(yVals: MutableList<Entry>?, label: String = "") : LineRad
         // mCircleRadius = UtilsKtKt.convertDpToPixel(4f);
         // mLineWidth = UtilsKtKt.convertDpToPixel(1f);
         if (this.circleColors == null) {
-            this.circleColors = ArrayList<Int?>()
+            this.circleColors = ArrayList<Int>()
         }
         circleColors!!.clear()
 
@@ -198,7 +198,7 @@ open class LineDataSet(yVals: MutableList<Entry>?, label: String = "") : LineRad
         }
 
     override fun getCircleColor(index: Int): Int {
-        return circleColors!![index]!!
+        return circleColors!![index]
     }
 
     override val circleColorCount: Int
@@ -267,15 +267,15 @@ open class LineDataSet(yVals: MutableList<Entry>?, label: String = "") : LineRad
      * this method. Internally, the colors are resolved using
      * getResources().getColor(...)
      */
-    fun setCircleColors(colors: IntArray, c: Context) {
+    fun setCircleColors(colors: IntArray, context: Context) {
         var clrs = this.circleColors
         if (clrs == null) {
             clrs = ArrayList()
         }
         clrs.clear()
 
         for (color in colors) {
-            clrs.add(c.resources.getColor(color))
+            clrs.add(context.resources.getColor(color))
         }
 
         this.circleColors = clrs
@@ -295,7 +295,7 @@ open class LineDataSet(yVals: MutableList<Entry>?, label: String = "") : LineRad
      */
     fun resetCircleColors() {
         if (this.circleColors == null) {
-            this.circleColors = ArrayList<Int?>()
+            this.circleColors = ArrayList()
         }
         circleColors!!.clear()
     }

MPChartLib/src/main/java/com/github/mikephil/charting/utils/ColorTemplate.kt

@@ -0,0 +1,87 @@
+package com.github.mikephil.charting.utils
+
+import android.graphics.Color
+
+/**
+ * Class that holds predefined color integer arrays (e.g.
+ * ColorTemplate.VORDIPLOM_COLORS) and convenience methods for loading colors
+ * from resources.
+ */
+object ColorTemplate {
+    /**
+     * an "invalid" color that indicates that no color is set
+     */
+    const val COLOR_NONE: Int = 0x00112233
+
+    /**
+     * this "color" is used for the Legend creation and indicates that the next
+     * form should be skipped
+     */
+    const val COLOR_SKIP: Int = 0x00112234
+
+    /**
+     * THE COLOR THEMES ARE PREDEFINED (predefined color integer arrays), FEEL
+     * FREE TO CREATE YOUR OWN WITH AS MANY DIFFERENT COLORS AS YOU WANT
+     */
+    val LIBERTY_COLORS: IntArray = intArrayOf(
+        Color.rgb(207, 248, 246), Color.rgb(148, 212, 212), Color.rgb(136, 180, 187),
+        Color.rgb(118, 174, 175), Color.rgb(42, 109, 130)
+    )
+    val JOYFUL_COLORS: IntArray = intArrayOf(
+        Color.rgb(217, 80, 138), Color.rgb(254, 149, 7), Color.rgb(254, 247, 120),
+        Color.rgb(106, 167, 134), Color.rgb(53, 194, 209)
+    )
+    val PASTEL_COLORS: IntArray = intArrayOf(
+        Color.rgb(64, 89, 128), Color.rgb(149, 165, 124), Color.rgb(217, 184, 162),
+        Color.rgb(191, 134, 134), Color.rgb(179, 48, 80)
+    )
+    val COLORFUL_COLORS: IntArray = intArrayOf(
+        Color.rgb(193, 37, 82), Color.rgb(255, 102, 0), Color.rgb(245, 199, 0),
+        Color.rgb(106, 150, 31), Color.rgb(179, 100, 53)
+    )
+    val VORDIPLOM_COLORS: IntArray = intArrayOf(
+        Color.rgb(192, 255, 140), Color.rgb(255, 247, 140), Color.rgb(255, 208, 140),
+        Color.rgb(140, 234, 255), Color.rgb(255, 140, 157)
+    )
+    val MATERIAL_COLORS: IntArray = intArrayOf(
+        rgb("#2ecc71"), rgb("#f1c40f"), rgb("#e74c3c"), rgb("#3498db")
+    )
+
+    /**
+     * Converts the given hex-color-string to rgb.
+     */
+    fun rgb(hex: String): Int {
+        val color = hex.replace("#", "").toLong(16).toInt()
+        val r = (color shr 16) and 0xFF
+        val g = (color shr 8) and 0xFF
+        val b = (color) and 0xFF
+        return Color.rgb(r, g, b)
+    }
+
+    val holoBlue: Int
+        /**
+         * Returns the Android ICS holo blue light color.
+         */
+        get() = Color.rgb(51, 181, 229)
+
+    /**
+     * Sets the alpha component of the given color.
+     * @param alpha 0 - 255
+     */
+    fun colorWithAlpha(color: Int, alpha: Int): Int {
+        return (color and 0xffffff) or ((alpha and 0xff) shl 24)
+    }
+
+    /**
+     * Turns an array of colors (integer color values) into an ArrayList of colors.
+     */
+    fun createColors(colors: IntArray): MutableList<Int> {
+        val result: MutableList<Int> = ArrayList()
+
+        for (i in colors) {
+            result.add(i)
+        }
+
+        return result
+    }
+}

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

@@ -8,7 +8,6 @@ import android.text.SpannableString
 import android.text.style.ForegroundColorSpan
 import android.text.style.RelativeSizeSpan
 import android.text.style.StyleSpan
-import android.util.DisplayMetrics
 import android.view.Menu
 import android.view.MenuItem
 import android.widget.RelativeLayout
@@ -113,7 +112,7 @@ class HalfPieChartActivity : DemoBase() {
         s.setSpan(ForegroundColorSpan(Color.GRAY), 14, s.length - 15, 0)
         s.setSpan(RelativeSizeSpan(.8f), 14, s.length - 15, 0)
         s.setSpan(StyleSpan(Typeface.ITALIC), s.length - 14, s.length, 0)
-        s.setSpan(ForegroundColorSpan(ColorTemplate.getHoloBlue()), s.length - 14, s.length, 0)
+        s.setSpan(ForegroundColorSpan(ColorTemplate.holoBlue), s.length - 14, s.length, 0)
         return s
     }
 

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

@@ -104,7 +104,7 @@ class LineChartDualAxisActivity : DemoBase(), OnSeekBarChangeListener, OnChartVa
 
         val leftAxis = chart!!.axisLeft
         leftAxis.typeface = tfLight
-        leftAxis.textColor = ColorTemplate.getHoloBlue()
+        leftAxis.textColor = ColorTemplate.holoBlue
         leftAxis.axisMaximum = 200f
         leftAxis.axisMinimum = 0f
         leftAxis.setDrawGridLines(true)
@@ -163,12 +163,12 @@ class LineChartDualAxisActivity : DemoBase(), OnSeekBarChangeListener, OnChartVa
             set1 = LineDataSet(values1, "DataSet 1")
 
             set1.axisDependency = AxisDependency.LEFT
-            set1.color = ColorTemplate.getHoloBlue()
+            set1.color = ColorTemplate.holoBlue
             set1.setCircleColor(Color.WHITE)
             set1.lineWidth = 2f
             set1.circleRadius = 3f
             set1.fillAlpha = 65
-            set1.fillColor = ColorTemplate.getHoloBlue()
+            set1.fillColor = ColorTemplate.holoBlue
             set1.highLightColor = Color.rgb(244, 117, 117)
             set1.isDrawCircleHoleEnabled = false
 

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

@@ -92,7 +92,7 @@ class LineChartTimeActivity : DemoBase(), OnSeekBarChangeListener {
         val leftAxis = chart!!.axisLeft
         leftAxis.setPosition(YAxis.YAxisLabelPosition.INSIDE_CHART)
         leftAxis.typeface = tfLight
-        leftAxis.textColor = ColorTemplate.getHoloBlue()
+        leftAxis.textColor = ColorTemplate.holoBlue
         leftAxis.setDrawGridLines(true)
         leftAxis.isGranularityEnabled = true
         leftAxis.axisMinimum = 0f
@@ -118,10 +118,9 @@ class LineChartTimeActivity : DemoBase(), OnSeekBarChangeListener {
         // increment by 1 hour
         var x = now.toFloat()
         while (x < to) {
-            val y: Float
-            if (count == 100)  // initial
-                y = (valuesData[x.roundToInt()])!!.toFloat() * 50 + 50
-            else y = (Math.random() * 50 + 50).toFloat() // manually triggered
+            val y: Float = if (count == 100)  // initial
+                (valuesData[x.roundToInt()])!!.toFloat() * 50 + 50
+            else (Math.random() * 50 + 50).toFloat() // manually triggered
 
             values.add(Entry(x, y)) // add one entry per hour
             x++
@@ -130,13 +129,13 @@ class LineChartTimeActivity : DemoBase(), OnSeekBarChangeListener {
         // create a dataset and give it a type
         val set1 = LineDataSet(values, "DataSet 1")
         set1.axisDependency = AxisDependency.LEFT
-        set1.color = ColorTemplate.getHoloBlue()
-        set1.setSingleValueTextColor(ColorTemplate.getHoloBlue())
+        set1.color = ColorTemplate.holoBlue
+        set1.setSingleValueTextColor(ColorTemplate.holoBlue)
         set1.lineWidth = 1.5f
         set1.isDrawCirclesEnabled = false
         set1.isDrawValues = false
         set1.fillAlpha = 65
-        set1.fillColor = ColorTemplate.getHoloBlue()
+        set1.fillColor = ColorTemplate.holoBlue
         set1.highLightColor = Color.rgb(244, 117, 117)
         set1.isDrawCircleHoleEnabled = false
 

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

@@ -144,7 +144,7 @@ class PieChartActivity : DemoBase(), OnSeekBarChangeListener, OnChartValueSelect
 
         for (c in ColorTemplate.PASTEL_COLORS) colors.add(c)
 
-        colors.add(ColorTemplate.getHoloBlue())
+        colors.add(ColorTemplate.holoBlue)
 
         dataSet.setColors(colors)
 
@@ -274,7 +274,7 @@ class PieChartActivity : DemoBase(), OnSeekBarChangeListener, OnChartValueSelect
         s.setSpan(ForegroundColorSpan(Color.GRAY), 14, s.length - 15, 0)
         s.setSpan(RelativeSizeSpan(.8f), 14, s.length - 15, 0)
         s.setSpan(StyleSpan(Typeface.ITALIC), s.length - 14, s.length, 0)
-        s.setSpan(ForegroundColorSpan(ColorTemplate.getHoloBlue()), s.length - 14, s.length, 0)
+        s.setSpan(ForegroundColorSpan(ColorTemplate.holoBlue), s.length - 14, s.length, 0)
         return s
     }
 

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

@@ -146,7 +146,7 @@ class PieChartRoundedActivity : DemoBase(), OnSeekBarChangeListener, OnChartValu
 
         for (c in ColorTemplate.PASTEL_COLORS) colors.add(c)
 
-        colors.add(ColorTemplate.getHoloBlue())
+        colors.add(ColorTemplate.holoBlue)
 
         dataSet.setColors(colors)
 
@@ -279,7 +279,7 @@ class PieChartRoundedActivity : DemoBase(), OnSeekBarChangeListener, OnChartValu
         s.setSpan(ForegroundColorSpan(Color.GRAY), 14, s.length - 15, 0)
         s.setSpan(RelativeSizeSpan(.8f), 14, s.length - 15, 0)
         s.setSpan(StyleSpan(Typeface.ITALIC), s.length - 14, s.length, 0)
-        s.setSpan(ForegroundColorSpan(ColorTemplate.getHoloBlue()), s.length - 14, s.length, 0)
+        s.setSpan(ForegroundColorSpan(ColorTemplate.holoBlue), s.length - 14, s.length, 0)
         return s
     }
 

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

@@ -131,7 +131,7 @@ class PiePolylineChartActivity : DemoBase(), OnSeekBarChangeListener, OnChartVal
 
         for (c in ColorTemplate.PASTEL_COLORS) colors.add(c)
 
-        colors.add(ColorTemplate.getHoloBlue())
+        colors.add(ColorTemplate.holoBlue)
 
         dataSet.setColors(colors)
 
@@ -261,7 +261,7 @@ class PiePolylineChartActivity : DemoBase(), OnSeekBarChangeListener, OnChartVal
         s.setSpan(ForegroundColorSpan(Color.GRAY), 12, s.length - 10, 0)
         s.setSpan(RelativeSizeSpan(.65f), 12, s.length - 10, 0)
         s.setSpan(StyleSpan(Typeface.ITALIC), s.length - 10, s.length, 0)
-        s.setSpan(ForegroundColorSpan(ColorTemplate.getHoloBlue()), s.length - 10, s.length, 0)
+        s.setSpan(ForegroundColorSpan(ColorTemplate.holoBlue), s.length - 10, s.length, 0)
         return s
     }