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alshanalshan
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Move 'view' demos to a subfolder.
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‎demo/view/android-plot-view/build.gradle.kts‎

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/*
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* Copyright (c) 2023. JetBrains s.r.o.
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* Use of this source code is governed by the MIT license that can be found in the LICENSE file.
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*/
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plugins {
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kotlin("android")
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id("com.android.application")
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}
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android {
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compileSdk = (findProperty("android.compileSdk") as String).toInt()
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namespace = "demo.plot.view"
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defaultConfig {
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applicationId = "demo.plot.view"
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minSdk = (findProperty("android.minSdk") as String).toInt()
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targetSdk = (findProperty("android.targetSdk") as String).toInt()
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versionCode = 1
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versionName = "1.0"
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}
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buildTypes {
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debug {
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isDebuggable = true
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}
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}
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compileOptions {
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sourceCompatibility = JavaVersion.VERSION_11
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targetCompatibility = JavaVersion.VERSION_11
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}
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kotlin {
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jvmToolchain(11)
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}
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}
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val letsPlotVersion = extra["letsPlot.version"] as String
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val letsPlotKotlinVersion = extra["letsPlotKotlin.version"] as String
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dependencies {
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implementation(project(":platf-android"))
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implementation(project(":demo-plot-shared"))
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implementation("org.jetbrains.lets-plot:lets-plot-kotlin-kernel:${letsPlotKotlinVersion}")
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implementation("org.jetbrains.lets-plot:lets-plot-common:$letsPlotVersion")
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implementation("org.jetbrains.lets-plot:canvas:${letsPlotVersion}")
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implementation("org.jetbrains.lets-plot:plot-raster:$letsPlotVersion")
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}

‎demo/view/android-plot-view/src/main/AndroidManifest.xml‎

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<?xml version="1.0" encoding="utf-8"?>
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<manifest xmlns:android="http://schemas.android.com/apk/res/android"
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xmlns:tools="http://schemas.android.com/tools" >
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<application
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android:allowBackup="true"
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android:debuggable="true"
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android:icon="@mipmap/ic_launcher"
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android:label="@string/app_name"
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android:roundIcon="@mipmap/ic_launcher_round"
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android:supportsRtl="true"
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tools:ignore="HardcodedDebugMode" >
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<activity
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android:name="demo.plot.view.PlotGirdDemoActivity"
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android:exported="true">
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<intent-filter>
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<action android:name="android.intent.action.MAIN" />
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<category android:name="android.intent.category.LAUNCHER" />
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</intent-filter>
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</activity>
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<activity
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android:name="demo.plot.view.LayoutDemoActivity"
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android:exported="true">
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<intent-filter>
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<action android:name="android.intent.action.MAIN" />
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<category android:name="android.intent.category.LAUNCHER" />
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</intent-filter>
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</activity>
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<activity
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android:name="demo.plot.view.ResizingWithFitContainerSizePolicyDemoActivity"
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android:exported="true">
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<intent-filter>
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<action android:name="android.intent.action.MAIN" />
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<category android:name="android.intent.category.LAUNCHER" />
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</intent-filter>
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</activity>
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<activity
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android:name="demo.plot.view.ResizingWithFixedPlotSizePolicyDemoActivity"
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android:exported="true">
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<intent-filter>
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<action android:name="android.intent.action.MAIN" />
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<category android:name="android.intent.category.LAUNCHER" />
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</intent-filter>
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</activity>
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<!-- android:theme="@style/Theme.AppCompat.Light"> -->
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<!-- android:theme="@style/Theme.AppCompat.Light.NoActionBar"> -->
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<activity
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android:name="demo.plot.view.DensityPlotDemoActivity"
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android:exported="true" >
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<intent-filter>
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<action android:name="android.intent.action.MAIN" />
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<category android:name="android.intent.category.LAUNCHER" />
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</intent-filter>
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</activity>
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</application>
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</manifest>

‎demo/view/android-plot-view/src/main/kotlin/demo/plot/view/DensityPlotDemoActivity.kt‎

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/*
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* Copyright (c) 2025 JetBrains s.r.o.
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* Use of this source code is governed by the MIT license that can be found in the LICENSE file.
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*/
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package demo.plot.view
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import android.app.Activity
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import android.graphics.Color
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import android.os.Bundle
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import org.jetbrains.letsPlot.android.canvas.CanvasView
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import org.jetbrains.letsPlot.core.util.sizing.SizingPolicy
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import org.jetbrains.letsPlot.intern.toSpec
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import org.jetbrains.letsPlot.raster.builder.MonolithicCanvas
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import plotSpec.DensitySpec
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class DensityPlotDemoActivity : Activity() {
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override fun onCreate(savedInstanceState: Bundle?) {
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super.onCreate(savedInstanceState)
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val plotFigure = DensitySpec().createFigure()
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setContentView(
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CanvasView(this).apply {
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figure = MonolithicCanvas.buildPlotFigureFromRawSpec(
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rawSpec = plotFigure.toSpec(),
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sizingPolicy = SizingPolicy.fitContainerSize(false),
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computationMessagesHandler = {}
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)
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setBackgroundColor(Color.GREEN)
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}
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)
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}
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}

‎demo/view/android-plot-view/src/main/kotlin/demo/plot/view/LayoutDemoActivity.kt‎

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package demo.plot.view
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import android.app.Activity
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import android.graphics.Color
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import android.os.Bundle
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import android.view.ViewGroup
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import android.widget.*
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import org.jetbrains.letsPlot.android.canvas.CanvasView
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import org.jetbrains.letsPlot.core.util.sizing.SizingPolicy
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import org.jetbrains.letsPlot.intern.toSpec
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import org.jetbrains.letsPlot.raster.builder.MonolithicCanvas
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import org.jetbrains.letsPlot.raster.view.PlotCanvasFigure
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import org.jetbrains.letsPlot.themes.flavorDarcula
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import plotSpec.BarPlotSpec
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class LayoutDemoActivity : Activity() {
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private companion object {
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private const val MAX_PLOT_WIDTH_DP = 390
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private const val MIN_PARENT_HEIGHT_DP = 50
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private const val MAX_PARENT_HEIGHT_DP = 390
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}
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private lateinit var plotSizeLabel: TextView
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private lateinit var sizingPolicyOptions: RadioGroup
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private lateinit var preserveAspectRatio: CheckBox
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private lateinit var plotWidthSlider: SeekBar
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private lateinit var plotHeightSlider: SeekBar
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private lateinit var containerOptionsGroup: ViewGroup
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private lateinit var fixedSizeOptionsGroup: ViewGroup
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private lateinit var widthOptions: RadioGroup
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private lateinit var heightOptions: RadioGroup
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private lateinit var parentContainer: FrameLayout
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private lateinit var parentWidthSlider: SeekBar
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private lateinit var parentHeightSlider: SeekBar
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private lateinit var demoView: CanvasView
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private val plotFigure = PlotCanvasFigure()
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private val plotSpec = (BarPlotSpec().basic + flavorDarcula()).toSpec()
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override fun onCreate(savedInstanceState: Bundle?) {
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super.onCreate(savedInstanceState)
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setContentView(R.layout.layout_demo_activity)
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sizingPolicyOptions = findViewById(R.id.sizing_policy_options)
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preserveAspectRatio = findViewById(R.id.preserve_aspect_ratio)
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plotWidthSlider = findViewById(R.id.plot_width_slider)
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plotHeightSlider = findViewById(R.id.plot_height_slider)
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plotSizeLabel = findViewById(R.id.plot_size_label)
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containerOptionsGroup = findViewById(R.id.container_options_group)
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fixedSizeOptionsGroup = findViewById(R.id.fixed_size_options_group)
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widthOptions = findViewById(R.id.width_options)
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heightOptions = findViewById(R.id.height_options)
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parentContainer = findViewById(R.id.parent_container)
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parentWidthSlider = findViewById(R.id.parent_width_slider)
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parentHeightSlider = findViewById(R.id.parent_height_slider)
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demoView = CanvasView(this).apply {
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figure = plotFigure
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setBackgroundColor(Color.GREEN)
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}
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parentContainer.addView(demoView)
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setupControls()
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findViewById<RadioButton>(R.id.width_match).isChecked = true
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findViewById<RadioButton>(R.id.height_match).isChecked = true
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findViewById<RadioButton>(R.id.sizing_policy_container).isChecked = true
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updateDemoViewLayoutParams()
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updateParentContainerSize()
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updatePlotOptions()
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updateUiEnabledState()
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}
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private fun setupControls() {
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sizingPolicyOptions.setOnCheckedChangeListener { _, checkedId ->
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updateUiEnabledState()
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updatePlotOptions()
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}
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preserveAspectRatio.setOnCheckedChangeListener { _, checkedId ->
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updatePlotOptions()
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}
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val plotSizeUpdateListener = object : SeekBar.OnSeekBarChangeListener {
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override fun onProgressChanged(seekBar: SeekBar?, progress: Int, fromUser: Boolean) {
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updatePlotOptions()
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}
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override fun onStartTrackingTouch(seekBar: SeekBar?) {}
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override fun onStopTrackingTouch(seekBar: SeekBar?) {}
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}
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plotWidthSlider.setOnSeekBarChangeListener(plotSizeUpdateListener)
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plotHeightSlider.setOnSeekBarChangeListener(plotSizeUpdateListener)
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val layoutUpdateListener = RadioGroup.OnCheckedChangeListener { _, _ ->
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updateDemoViewLayoutParams()
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}
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widthOptions.setOnCheckedChangeListener(layoutUpdateListener)
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heightOptions.setOnCheckedChangeListener(layoutUpdateListener)
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val parentSizeUpdateListener = object : SeekBar.OnSeekBarChangeListener {
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override fun onProgressChanged(seekBar: SeekBar?, progress: Int, fromUser: Boolean) {
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updateParentContainerSize()
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}
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override fun onStartTrackingTouch(seekBar: SeekBar?) {}
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override fun onStopTrackingTouch(seekBar: SeekBar?) {}
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}
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parentWidthSlider.setOnSeekBarChangeListener(parentSizeUpdateListener)
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parentHeightSlider.setOnSeekBarChangeListener(parentSizeUpdateListener)
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}
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private fun updatePlotOptions() {
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val plotWidth = MAX_PLOT_WIDTH_DP * plotWidthSlider.progress / 100.0
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val plotHeight = MAX_PLOT_WIDTH_DP * plotHeightSlider.progress / 100.0
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plotSizeLabel.text = "Plot size: $plotWidth x $plotHeight"
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val sizingPolicy = when (sizingPolicyOptions.checkedRadioButtonId) {
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R.id.sizing_policy_fixed -> SizingPolicy.fixed(width = plotWidth, height = plotHeight)
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R.id.sizing_policy_container -> SizingPolicy.fitContainerSize(preserveAspectRatio.isChecked)
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else -> error("Unknown sizing policy option selected")
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}
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MonolithicCanvas.updatePlotFigureFromRawSpec(plotFigure, plotSpec, sizingPolicy) { _ -> }
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}
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private fun updateDemoViewLayoutParams() {
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val width = getSelectedLayoutParam(widthOptions.checkedRadioButtonId)
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val height = getSelectedLayoutParam(heightOptions.checkedRadioButtonId)
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demoView.layoutParams = FrameLayout.LayoutParams(width, height)
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}
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private fun updateParentContainerSize() {
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val density = resources.displayMetrics.density
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val lp = parentContainer.layoutParams
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val parentOfContainer = parentContainer.parent as ViewGroup
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val parentMaxWidth = parentOfContainer.width - parentOfContainer.paddingStart - parentOfContainer.paddingEnd
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val progressWidth = parentWidthSlider.progress / 100f
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if (parentMaxWidth > 0) {
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lp.width = (parentMaxWidth * progressWidth).coerceAtLeast(100f).toInt()
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}
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val heightRangePx = (MAX_PARENT_HEIGHT_DP - MIN_PARENT_HEIGHT_DP) * density
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val minHeightPx = (MIN_PARENT_HEIGHT_DP * density)
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val progressHeight = parentHeightSlider.progress / 100f
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lp.height = (minHeightPx + (heightRangePx * progressHeight)).toInt()
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findViewById<TextView>(R.id.parent_container_size_label).text = "Parent size: ${lp.width} x ${lp.height}"
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parentContainer.layoutParams = lp
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}
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private fun getSelectedLayoutParam(checkedId: Int): Int {
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val density = resources.displayMetrics.density
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return when (checkedId) {
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R.id.width_match, R.id.height_match -> ViewGroup.LayoutParams.MATCH_PARENT
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R.id.width_wrap, R.id.height_wrap -> ViewGroup.LayoutParams.WRAP_CONTENT
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R.id.width_fixed, R.id.height_fixed -> (200 * density).toInt()
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else -> ViewGroup.LayoutParams.WRAP_CONTENT
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}
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}
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private fun updateUiEnabledState() {
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when (sizingPolicyOptions.checkedRadioButtonId) {
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R.id.sizing_policy_container -> {
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// Enable the "fitContainerSize" options
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setGroupEnabled(containerOptionsGroup, true)
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// Disable the "fixed" size options
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setGroupEnabled(fixedSizeOptionsGroup, false)
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}
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R.id.sizing_policy_fixed -> {
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// Disable the "fitContainerSize" options
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setGroupEnabled(containerOptionsGroup, false)
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// Enable the "fixed" size options
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setGroupEnabled(fixedSizeOptionsGroup, true)
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}
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}
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}
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private fun setGroupEnabled(viewGroup: ViewGroup, isEnabled: Boolean) {
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viewGroup.isEnabled = isEnabled
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// Loop through all the children of the ViewGroup
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for (i in 0 until viewGroup.childCount) {
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val child = viewGroup.getChildAt(i)
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child.isEnabled = isEnabled
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// Set alpha to provide a visual cue for being disabled
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child.alpha = if (isEnabled) 1.0f else 0.5f
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}
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}
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}

‎demo/view/android-plot-view/src/main/kotlin/demo/plot/view/PlotGirdDemoActivity.kt‎

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/*
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* Copyright (c) 2025 JetBrains s.r.o.
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* Use of this source code is governed by the MIT license that can be found in the LICENSE file.
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*/
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package demo.plot.view
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import android.app.Activity
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import android.graphics.Color
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import android.os.Bundle
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import org.jetbrains.letsPlot.android.canvas.CanvasView
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import org.jetbrains.letsPlot.core.util.sizing.SizingPolicy
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import org.jetbrains.letsPlot.intern.toSpec
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import org.jetbrains.letsPlot.raster.builder.MonolithicCanvas
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import plotSpec.PlotGridSpec
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class PlotGirdDemoActivity : Activity() {
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override fun onCreate(savedInstanceState: Bundle?) {
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super.onCreate(savedInstanceState)
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val plotFigure = PlotGridSpec().createFigure()
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setContentView(
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CanvasView(this).apply {
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figure = MonolithicCanvas.buildPlotFigureFromRawSpec(
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rawSpec = plotFigure.toSpec(),
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sizingPolicy = SizingPolicy.fitContainerSize(false),
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computationMessagesHandler = {}
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)
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setBackgroundColor(Color.GREEN)
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}
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)
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}
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}

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