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Canvas implementation for Android (android.view.View) (#31)
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‎demo/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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ndk {
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abiFilters += listOf("x86_64", "arm64-v8a")
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}
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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-skia"))
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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/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.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/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/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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}

‎demo/android-plot-view/src/main/kotlin/demo/plot/view/ResizingWithFitContainerSizePolicyDemoActivity.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 demo.plot.view.ResizingWithFixedPlotSizePolicyDemoActivity.Companion.setupResizableCanvas
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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 ResizingWithFitContainerSizePolicyDemoActivity: 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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val view = 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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setupResizableCanvas(view)
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}
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}

‎demo/android-plot-view/src/main/kotlin/demo/plot/view/ResizingWithFixedPlotSizePolicyDemoActivity.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 android.widget.FrameLayout
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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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import java.util.*
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class ResizingWithFixedPlotSizePolicyDemoActivity: 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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val view = CanvasView(this).apply {
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figure = MonolithicCanvas.buildPlotFigureFromRawSpec(
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rawSpec = plotFigure.toSpec(),
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sizingPolicy = SizingPolicy.keepFigureDefaultSize(),
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computationMessagesHandler = {}
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)
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setBackgroundColor(Color.GREEN)
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}
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setupResizableCanvas(view)
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}
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companion object {
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fun Activity.setupResizableCanvas(view: CanvasView) {
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setContentView(view)
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val resizeTask = object : TimerTask() {
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var width = 500
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var height = 500
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var dv = 2
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override fun run() {
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runOnUiThread {
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if (width < 500 || width > 1000) {
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dv *= -1
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}
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width += dv
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height += dv
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view.layoutParams = FrameLayout.LayoutParams(width, height)
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}
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}
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}
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Timer().schedule(resizeTask, 0, 10)
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}
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}
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}

‎demo/svg/android/src/main/res/drawable/ic_launcher_foreground.xml‎ renamed to ‎demo/android-plot-view/src/main/res/drawable/ic_launcher_foreground.xml‎

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‎demo/android-plot-view/src/main/res/layout/activity_another.xml‎

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<?xml version="1.0" encoding="utf-8"?>
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<androidx.constraintlayout.widget.ConstraintLayout
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xmlns:android="http://schemas.android.com/apk/res/android"
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xmlns:tools="http://schemas.android.com/tools"
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android:id="@+id/main"
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android:layout_width="match_parent"
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android:layout_height="match_parent"
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tools:context="demo.plot.view.AnotherActivity">
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</androidx.constraintlayout.widget.ConstraintLayout>

‎demo/svg/android/src/main/res/mipmap-anydpi-v26/ic_launcher.xml‎ renamed to ‎demo/android-plot-view/src/main/res/mipmap-anydpi-v26/ic_launcher.xml‎

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‎demo/svg/android/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml‎ renamed to ‎demo/android-plot-view/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml‎

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