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ViewBinding FilledLine #490

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Merged
hannesa2 merged 2 commits into from
Dec 17, 2025
Merged

ViewBinding FilledLine #490

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e93c27a
ViewBinding FilledLine
hannesa2 Dec 17, 2025
b9d5da7
Rename
hannesa2 Dec 17, 2025
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79 changes: 39 additions & 40 deletions app/src/main/kotlin/info/appdev/chartexample/FilledLineActivity.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -5,7 +5,7 @@ import android.graphics.Color
import android.os.Bundle
import android.view.Menu
import android.view.MenuItem
import com.github.mikephil.charting.charts.LineChart
import androidx.core.net.toUri
import com.github.mikephil.charting.components.YAxis
import com.github.mikephil.charting.data.Entry
import com.github.mikephil.charting.data.LineData
Expand All @@ -14,8 +14,8 @@ import com.github.mikephil.charting.formatter.IFillFormatter
import com.github.mikephil.charting.interfaces.dataprovider.LineDataProvider
import com.github.mikephil.charting.interfaces.datasets.ILineDataSet
import info.appdev.chartexample.DataTools.Companion.getValues
import info.appdev.chartexample.databinding.ActivityLinechartNoseekbarBinding
import info.appdev.chartexample.notimportant.DemoBase
import androidx.core.net.toUri

/**
* This works by inverting the background and desired "fill" color. First, we draw the fill color
Expand All @@ -25,79 +25,80 @@ import androidx.core.net.toUri
* the area OUTSIDE the lines!
*/
class FilledLineActivity : DemoBase() {
private var chart: LineChart? = null
private val fillColor = Color.argb(150, 51, 181, 229)

private lateinit var binding: ActivityLinechartNoseekbarBinding

override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_linechart_noseekbar)
binding = ActivityLinechartNoseekbarBinding.inflate(layoutInflater)
val view = binding.root
setContentView(view)

chart = findViewById(R.id.chart1)
chart!!.setBackgroundColor(Color.WHITE)
chart!!.setGridBackgroundColor(fillColor)
chart!!.setDrawGridBackground(true)
binding.chart1.setBackgroundColor(Color.WHITE)
binding.chart1.setGridBackgroundColor(fillColor)
binding.chart1.setDrawGridBackground(true)

chart!!.setDrawBorders(true)
binding.chart1.setDrawBorders(true)

// no description text
chart!!.description.isEnabled = false
binding.chart1.description.isEnabled = false

// if disabled, scaling can be done on x- and y-axis separately
chart!!.setPinchZoom(false)
binding.chart1.setPinchZoom(false)

val l = chart!!.legend
val l = binding.chart1.legend
l.isEnabled = false

val xAxis = chart!!.xAxis
val xAxis = binding.chart1.xAxis
xAxis.isEnabled = false

val leftAxis = chart!!.axisLeft
val leftAxis = binding.chart1.axisLeft
leftAxis.setAxisMaximum(900f)
leftAxis.setAxisMinimum(-250f)
leftAxis.setDrawAxisLine(false)
leftAxis.setDrawZeroLine(false)
leftAxis.setDrawGridLines(false)

chart!!.axisRight.isEnabled = false
binding.chart1.axisRight.isEnabled = false

// add data
setData(60f)

chart!!.invalidate()
binding.chart1.invalidate()
}

private fun setData(range: Float) {
private fun setData(@Suppress("SameParameterValue") range: Float) {
val count = 100
val values1 = ArrayList<Entry?>()
val valuesArray1 = ArrayList<Entry?>()
val sampleValues = getValues(count + 2)

for (i in 0..<count) {
val `val` = (sampleValues[i]!!.toFloat() * range) + 50
values1.add(Entry(i.toFloat(), `val`))
val valueY = (sampleValues[i]!!.toFloat() * range) + 50
valuesArray1.add(Entry(i.toFloat(), valueY))
}

val values2 = ArrayList<Entry?>()
val valuesArray2 = ArrayList<Entry?>()

for (i in 0..<count) {
val `val` = (sampleValues[i + 1]!!.toFloat() * range) + 450
values2.add(Entry(i.toFloat(), `val`))
val valueY = (sampleValues[i + 1]!!.toFloat() * range) + 450
valuesArray2.add(Entry(i.toFloat(), valueY))
}

val set1: LineDataSet
val set2: LineDataSet

if (chart!!.data != null &&
chart!!.data!!.getDataSetCount() > 0
if (binding.chart1.data != null &&
binding.chart1.data!!.getDataSetCount() > 0
) {
set1 = chart!!.data!!.getDataSetByIndex(0) as LineDataSet
set2 = chart!!.data!!.getDataSetByIndex(1) as LineDataSet
set1.setEntries(values1)
set2.setEntries(values2)
chart!!.data!!.notifyDataChanged()
chart!!.notifyDataSetChanged()
set1 = binding.chart1.data!!.getDataSetByIndex(0) as LineDataSet
set2 = binding.chart1.data!!.getDataSetByIndex(1) as LineDataSet
set1.setEntries(valuesArray1)
set2.setEntries(valuesArray2)
binding.chart1.data!!.notifyDataChanged()
binding.chart1.notifyDataSetChanged()
} else {
// create a dataset and give it a type
set1 = LineDataSet(values1, "DataSet 1")
set1 = LineDataSet(valuesArray1, "DataSet 1")

set1.axisDependency = YAxis.AxisDependency.LEFT
set1.setColor(Color.rgb(255, 241, 46))
Expand All @@ -113,12 +114,12 @@ class FilledLineActivity : DemoBase() {
override fun getFillLinePosition(dataSet: ILineDataSet?, dataProvider: LineDataProvider?): Float {
// change the return value here to better understand the effect
// return 0;
return chart!!.axisLeft.axisMinimum
return binding.chart1.axisLeft.axisMinimum
}
}

// create a dataset and give it a type
set2 = LineDataSet(values2, "DataSet 2")
set2 = LineDataSet(valuesArray2, "DataSet 2")
set2.axisDependency = YAxis.AxisDependency.LEFT
set2.setColor(Color.rgb(255, 241, 46))
set2.setDrawCircles(false)
Expand All @@ -133,7 +134,7 @@ class FilledLineActivity : DemoBase() {
override fun getFillLinePosition(dataSet: ILineDataSet?, dataProvider: LineDataProvider?): Float {
// change the return value here to better understand the effect
// return 600;
return chart!!.axisLeft.axisMaximum
return binding.chart1.axisLeft.axisMaximum
}
}

Expand All @@ -145,8 +146,7 @@ class FilledLineActivity : DemoBase() {
val data = LineData(dataSets)
data.setDrawValues(false)

// set data
chart!!.setData(data)
binding.chart1.setData(data)
}
}

Expand All @@ -168,6 +168,5 @@ class FilledLineActivity : DemoBase() {
return true
}

public override fun saveToGallery() { /* Intentionally left empty */
}
public override fun saveToGallery() = Unit // Intentionally left empty
}
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