Merge pull request #224 from AppDevNext/Kotlinformatter

More Kotlin formatter

Author: hannesa2

MPChartExample/src/main/java/com/xxmassdeveloper/mpchartexample/custom/DayAxisValueFormatter.java

@@ -0,0 +1,94 @@
+package com.xxmassdeveloper.mpchartexample.custom
+
+import com.github.mikephil.charting.charts.BarLineChartBase
+import com.github.mikephil.charting.components.AxisBase
+import com.github.mikephil.charting.formatter.IAxisValueFormatter
+import kotlin.math.max
+
+class DayAxisValueFormatter(private val chart: BarLineChartBase<*>) : IAxisValueFormatter {
+    private val months = arrayOf(
+        "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
+    )
+
+    override fun getFormattedValue(value: Float, axis: AxisBase?): String {
+        val days = value.toInt()
+
+        val year = determineYear(days)
+
+        val month = determineMonth(days)
+        val monthName = months[month % months.size]
+        val yearName = year.toString()
+
+        if (chart.visibleXRange > 30 * 6) {
+            return "$monthName $yearName"
+        } else {
+            val dayOfMonth = determineDayOfMonth(days, month + 12 * (year - 2016))
+
+            var appendix = "th"
+
+            when (dayOfMonth) {
+                1 -> appendix = "st"
+                2 -> appendix = "nd"
+                3 -> appendix = "rd"
+                21 -> appendix = "st"
+                22 -> appendix = "nd"
+                23 -> appendix = "rd"
+                31 -> appendix = "st"
+            }
+            return if (dayOfMonth == 0) "" else "$dayOfMonth$appendix $monthName"
+        }
+    }
+
+    private fun getDaysForMonth(month: Int, year: Int): Int {
+        // month is 0-based
+
+        if (month == 1) {
+            var is29Feb = false
+
+            if (year < 1582) is29Feb = (if (year < 1) year + 1 else year) % 4 == 0
+            else if (year > 1582) is29Feb = year % 4 == 0 && (year % 100 != 0 || year % 400 == 0)
+
+            return if (is29Feb) 29 else 28
+        }
+
+        return if (month == 3 || month == 5 || month == 8 || month == 10) 30
+        else 31
+    }
+
+    private fun determineMonth(dayOfYear: Int): Int {
+        var month = -1
+        var days = 0
+
+        while (days < dayOfYear) {
+            month += 1
+
+            if (month >= 12) month = 0
+
+            val year = determineYear(days)
+            days += getDaysForMonth(month, year)
+        }
+
+        return max(month.toDouble(), 0.0).toInt()
+    }
+
+    private fun determineDayOfMonth(days: Int, month: Int): Int {
+        var count = 0
+        var daysForMonths = 0
+
+        while (count < month) {
+            val year = determineYear(daysForMonths)
+            daysForMonths += getDaysForMonth(count % 12, year)
+            count++
+        }
+
+        return days - daysForMonths
+    }
+
+    private fun determineYear(days: Int): Int {
+        return if (days <= 366) 2016
+        else if (days <= 730) 2017
+        else if (days <= 1094) 2018
+        else if (days <= 1458) 2019
+        else 2020
+    }
+}

MPChartExample/src/main/java/com/xxmassdeveloper/mpchartexample/custom/DayAxisValueFormatter.kt

@@ -0,0 +1,13 @@
+package com.xxmassdeveloper.mpchartexample.custom
+
+import com.github.mikephil.charting.components.AxisBase
+import com.github.mikephil.charting.formatter.IAxisValueFormatter
+import java.text.DecimalFormat
+
+class MyAxisValueFormatter : IAxisValueFormatter {
+    private val mFormat = DecimalFormat("###,###,###,##0.0")
+
+    override fun getFormattedValue(value: Float, axis: AxisBase?): String {
+        return mFormat.format(value.toDouble()) + " $"
+    }
+}

MPChartExample/src/main/java/com/xxmassdeveloper/mpchartexample/custom/MyAxisValueFormatter.java

@@ -0,0 +1,13 @@
+package com.xxmassdeveloper.mpchartexample.custom
+
+import com.github.mikephil.charting.formatter.IFillFormatter
+import com.github.mikephil.charting.interfaces.dataprovider.LineDataProvider
+import com.github.mikephil.charting.interfaces.datasets.ILineDataSet
+
+@Suppress("unused")
+class MyFillFormatter(private val fillPos: Float) : IFillFormatter {
+    override fun getFillLinePosition(dataSet: ILineDataSet?, dataProvider: LineDataProvider?): Float {
+        // your logic could be here
+        return fillPos
+    }
+}

MPChartExample/src/main/java/com/xxmassdeveloper/mpchartexample/custom/MyAxisValueFormatter.kt

@@ -0,0 +1,14 @@
+package com.xxmassdeveloper.mpchartexample.custom
+
+import com.github.mikephil.charting.data.Entry
+import com.github.mikephil.charting.formatter.IValueFormatter
+import com.github.mikephil.charting.utils.ViewPortHandler
+import java.text.DecimalFormat
+
+class MyValueFormatter : IValueFormatter {
+    private val decimalFormat = DecimalFormat("###,###,###,##0.0")
+
+    override fun getFormattedValue(value: Float, entry: Entry?, dataSetIndex: Int, viewPortHandler: ViewPortHandler?): String? {
+        return decimalFormat.format(value.toDouble()) + " $"
+    }
+}