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hannesa2 merged 1 commit into from
Dec 17, 2025
+74 −84
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View Binding #494

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158 changes: 74 additions & 84 deletions app/src/main/kotlin/info/appdev/chartexample/MultiLineChartActivity.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -9,10 +9,8 @@ import android.view.MenuItem
import android.view.MotionEvent
import android.widget.SeekBar
import android.widget.SeekBar.OnSeekBarChangeListener
import android.widget.TextView
import androidx.core.content.ContextCompat
import androidx.core.net.toUri
import com.github.mikephil.charting.charts.LineChart
import com.github.mikephil.charting.components.Legend
import com.github.mikephil.charting.data.Entry
import com.github.mikephil.charting.data.LineData
Expand All @@ -24,60 +22,52 @@ import com.github.mikephil.charting.listener.OnChartGestureListener
import com.github.mikephil.charting.listener.OnChartValueSelectedListener
import com.github.mikephil.charting.utils.ColorTemplate
import info.appdev.chartexample.DataTools.Companion.getValues
import info.appdev.chartexample.databinding.ActivityLinechartBinding
import info.appdev.chartexample.notimportant.DemoBase
import timber.log.Timber

class MultiLineChartActivity : DemoBase(), OnSeekBarChangeListener, OnChartGestureListener, OnChartValueSelectedListener {
private var chart: LineChart? = null
private var seekBarX: SeekBar? = null
private var seekBarY: SeekBar? = null
private var tvX: TextView? = null
private var tvY: TextView? = null

private lateinit var binding: ActivityLinechartBinding

override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_linechart)

tvX = findViewById(R.id.tvXMax)
tvY = findViewById(R.id.tvYMax)

seekBarX = findViewById(R.id.seekBarX)
seekBarX!!.setOnSeekBarChangeListener(this)

seekBarY = findViewById(R.id.seekBarY)
seekBarY!!.setOnSeekBarChangeListener(this)

chart = findViewById(R.id.chart1)
chart!!.setOnChartValueSelectedListener(this)

chart!!.setDrawGridBackground(false)
chart!!.description.isEnabled = false
chart!!.setDrawBorders(false)

chart!!.axisLeft.isEnabled = false
chart!!.axisRight.setDrawAxisLine(false)
chart!!.axisRight.setDrawGridLines(false)
chart!!.xAxis.setDrawAxisLine(false)
chart!!.xAxis.setDrawGridLines(false)
binding = ActivityLinechartBinding.inflate(layoutInflater)
val view = binding.root
setContentView(view)

binding.seekBarX.setOnSeekBarChangeListener(this)
binding.seekBarY.setOnSeekBarChangeListener(this)
binding.chart1.setOnChartValueSelectedListener(this)
binding.chart1.setDrawGridBackground(false)
binding.chart1.description.isEnabled = false
binding.chart1.setDrawBorders(false)

binding.chart1.axisLeft.isEnabled = false
binding.chart1.axisRight.setDrawAxisLine(false)
binding.chart1.axisRight.setDrawGridLines(false)
binding.chart1.xAxis.setDrawAxisLine(false)
binding.chart1.xAxis.setDrawGridLines(false)

// enable touch gestures
chart!!.setTouchEnabled(true)
binding.chart1.setTouchEnabled(true)

// enable scaling and dragging
chart!!.setDragEnabled(true)
chart!!.setScaleEnabled(true)
binding.chart1.setDragEnabled(true)
binding.chart1.setScaleEnabled(true)

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

seekBarX!!.progress = 20
seekBarY!!.progress = 100
binding.seekBarX.progress = 20
binding.seekBarY.progress = 100

val l = chart!!.legend
l.verticalAlignment = Legend.LegendVerticalAlignment.TOP
l.horizontalAlignment = Legend.LegendHorizontalAlignment.RIGHT
l.orientation = Legend.LegendOrientation.VERTICAL
l.setDrawInside(false)
binding.chart1.legend.apply {
verticalAlignment = Legend.LegendVerticalAlignment.TOP
horizontalAlignment = Legend.LegendHorizontalAlignment.RIGHT
orientation = Legend.LegendOrientation.VERTICAL
setDrawInside(false)
}
}

private val colors = intArrayOf(
Expand All @@ -87,32 +77,32 @@ class MultiLineChartActivity : DemoBase(), OnSeekBarChangeListener, OnChartGestu
)

override fun onProgressChanged(seekBar: SeekBar?, progress: Int, fromUser: Boolean) {
chart!!.resetTracking()
binding.chart1.resetTracking()

val progress: Int = seekBarX!!.progress
val progress: Int = binding.seekBarX.progress

tvX!!.text = seekBarX!!.progress.toString()
tvY!!.text = seekBarY!!.progress.toString()
binding.tvXMax.text = binding.seekBarX.progress.toString()
binding.tvYMax.text = binding.seekBarY.progress.toString()

val dataSets = ArrayList<ILineDataSet?>()
val dataSets = ArrayList<ILineDataSet>()

for (z in 0..2) {
for (datasetNumber in 0..2) {
val values = ArrayList<Entry?>()
val sampleValues = getValues(100)

for (i in 0..<progress) {
val `val` = ((sampleValues[i]!!.toFloat() * seekBarY!!.progress) + 3).toDouble()
values.add(Entry(i.toFloat(), `val`.toFloat()))
val valuesY = ((sampleValues[i]!!.toFloat() * binding.seekBarY.progress) + 3).toDouble()
values.add(Entry(i.toFloat(), valuesY.toFloat()))
}

val d = LineDataSet(values, "DataSet " + (z + 1))
d.setLineWidth(2.5f)
d.circleRadius = 4f
val lineDataSet = LineDataSet(values, "DataSet " + (datasetNumber + 1))
lineDataSet.setLineWidth(2.5f)
lineDataSet.circleRadius = 4f

val color = colors[z % colors.size]
d.setColor(color)
d.setCircleColor(color)
dataSets.add(d)
val color = colors[datasetNumber % colors.size]
lineDataSet.setColor(color)
lineDataSet.setCircleColor(color)
dataSets.add(lineDataSet)
}

// make the first DataSet dashed
Expand All @@ -121,8 +111,8 @@ class MultiLineChartActivity : DemoBase(), OnSeekBarChangeListener, OnChartGestu
(dataSets[0] as LineDataSet).setCircleColors(*ColorTemplate.VORDIPLOM_COLORS)

val data = LineData(dataSets)
chart!!.setData(data)
chart!!.invalidate()
binding.chart1.setData(data)
binding.chart1.invalidate()
}

override fun onCreateOptionsMenu(menu: Menu): Boolean {
Expand All @@ -141,44 +131,44 @@ class MultiLineChartActivity : DemoBase(), OnSeekBarChangeListener, OnChartGestu
}

R.id.actionToggleValues -> {
chart!!.data!!.dataSets.forEach { set ->
binding.chart1.data!!.dataSets.forEach { set ->
set.setDrawValues(!set.isDrawValuesEnabled)
}

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

R.id.actionTogglePinch -> {
if (chart!!.isPinchZoomEnabled) chart!!.setPinchZoom(false)
else chart!!.setPinchZoom(true)
if (binding.chart1.isPinchZoomEnabled) binding.chart1.setPinchZoom(false)
else binding.chart1.setPinchZoom(true)

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

R.id.actionToggleAutoScaleMinMax -> {
chart!!.isAutoScaleMinMaxEnabled = !chart!!.isAutoScaleMinMaxEnabled
chart!!.notifyDataSetChanged()
binding.chart1.isAutoScaleMinMaxEnabled = !binding.chart1.isAutoScaleMinMaxEnabled
binding.chart1.notifyDataSetChanged()
}

R.id.actionToggleHighlight -> {
if (chart!!.data != null) {
chart!!.data!!.isHighlightEnabled = !chart!!.data!!.isHighlightEnabled()
chart!!.invalidate()
if (binding.chart1.data != null) {
binding.chart1.data!!.isHighlightEnabled = !binding.chart1.data!!.isHighlightEnabled()
binding.chart1.invalidate()
}
}

R.id.actionToggleFilled -> {
chart!!.data!!.dataSets.forEach { set ->
binding.chart1.data!!.dataSets.forEach { set ->
if (set.isDrawFilledEnabled)
set.setDrawFilled(false)
else
set.setDrawFilled(true)
}
chart!!.invalidate()
binding.chart1.invalidate()
}

R.id.actionToggleCircles -> {
val sets = chart!!.data!!.dataSets
val sets = binding.chart1.data!!.dataSets

for (iSet in sets) {
val set = iSet as LineDataSet
Expand All @@ -187,11 +177,11 @@ class MultiLineChartActivity : DemoBase(), OnSeekBarChangeListener, OnChartGestu
else
set.setDrawCircles(true)
}
chart!!.invalidate()
binding.chart1.invalidate()
}

R.id.actionToggleCubic -> {
val sets = chart!!.data!!.dataSets
val sets = binding.chart1.data!!.dataSets

for (iSet in sets) {
val set = iSet as LineDataSet
Expand All @@ -200,11 +190,11 @@ class MultiLineChartActivity : DemoBase(), OnSeekBarChangeListener, OnChartGestu
else
LineDataSet.Mode.CUBIC_BEZIER
}
chart!!.invalidate()
binding.chart1.invalidate()
}

R.id.actionToggleStepped -> {
val sets = chart!!.data!!.dataSets
val sets = binding.chart1.data!!.dataSets

for (iSet in sets) {
val set = iSet as LineDataSet
Expand All @@ -213,11 +203,11 @@ class MultiLineChartActivity : DemoBase(), OnSeekBarChangeListener, OnChartGestu
else
LineDataSet.Mode.STEPPED
}
chart!!.invalidate()
binding.chart1.invalidate()
}

R.id.actionToggleHorizontalCubic -> {
val sets = chart!!.data!!.dataSets
val sets = binding.chart1.data!!.dataSets

for (iSet in sets) {
val set = iSet as LineDataSet
Expand All @@ -226,34 +216,34 @@ class MultiLineChartActivity : DemoBase(), OnSeekBarChangeListener, OnChartGestu
else
LineDataSet.Mode.HORIZONTAL_BEZIER
}
chart!!.invalidate()
binding.chart1.invalidate()
}

R.id.actionSave -> {
if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {
saveToGallery()
} else {
requestStoragePermission(chart)
requestStoragePermission(binding.chart1)
}
}

R.id.animateX -> {
chart!!.animateX(2000)
binding.chart1.animateX(2000)
}

R.id.animateY -> {
chart!!.animateY(2000)
binding.chart1.animateY(2000)
}

R.id.animateXY -> {
chart!!.animateXY(2000, 2000)
binding.chart1.animateXY(2000, 2000)
}
}
return true
}

override fun saveToGallery() {
saveToGallery(chart, "MultiLineChartActivity")
saveToGallery(binding.chart1, "MultiLineChartActivity")
}

override fun onChartGestureStart(me: MotionEvent, lastPerformedGesture: ChartGesture?) {
Expand All @@ -264,7 +254,7 @@ class MultiLineChartActivity : DemoBase(), OnSeekBarChangeListener, OnChartGestu
Timber.i("END, lastGesture: $lastPerformedGesture")

// un-highlight values after the gesture is finished and no single-tap
if (lastPerformedGesture != ChartGesture.SINGLE_TAP) chart!!.highlightValues(null) // or highlightTouch(null) for callback to onNothingSelected(...)
if (lastPerformedGesture != ChartGesture.SINGLE_TAP) binding.chart1.highlightValues(null) // or highlightTouch(null) for callback to onNothingSelected(...)
}

override fun onChartLongPressed(me: MotionEvent) {
Expand Down
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