├── app
    ├── .gitignore
    ├── src
    │   ├── main
    │   │   ├── res
    │   │   │   ├── values
    │   │   │   │   ├── strings.xml
    │   │   │   │   ├── themes.xml
    │   │   │   │   └── colors.xml
    │   │   │   ├── values-night
    │   │   │   │   └── themes.xml
    │   │   │   ├── mipmap-hdpi
    │   │   │   │   ├── ic_launcher.webp
    │   │   │   │   └── ic_launcher_round.webp
    │   │   │   ├── mipmap-mdpi
    │   │   │   │   ├── ic_launcher.webp
    │   │   │   │   └── ic_launcher_round.webp
    │   │   │   ├── mipmap-xhdpi
    │   │   │   │   ├── ic_launcher.webp
    │   │   │   │   └── ic_launcher_round.webp
    │   │   │   ├── mipmap-xxhdpi
    │   │   │   │   ├── ic_launcher.webp
    │   │   │   │   └── ic_launcher_round.webp
    │   │   │   ├── mipmap-xxxhdpi
    │   │   │   │   ├── ic_launcher.webp
    │   │   │   │   └── ic_launcher_round.webp
    │   │   │   ├── mipmap-anydpi-v26
    │   │   │   │   ├── ic_launcher.xml
    │   │   │   │   └── ic_launcher_round.xml
    │   │   │   ├── drawable-v24
    │   │   │   │   └── ic_launcher_foreground.xml
    │   │   │   └── drawable
    │   │   │   │   └── ic_launcher_background.xml
    │   │   ├── java
    │   │   │   └── ru
    │   │   │   │   └── shirobokov
    │   │   │   │       └── marketchart
    │   │   │   │           ├── chart
    │   │   │   │               ├── Candle.kt
    │   │   │   │               ├── MarketChartState.kt
    │   │   │   │               └── MarketChart.kt
    │   │   │   │           └── ChartActivity.kt
    │   │   └── AndroidManifest.xml
    │   ├── test
    │   │   └── java
    │   │   │   └── ru
    │   │   │       └── shirobokov
    │   │   │           └── marketchart
    │   │   │               └── ExampleUnitTest.kt
    │   └── androidTest
    │   │   └── java
    │   │       └── ru
    │   │           └── shirobokov
    │   │               └── marketchart
    │   │                   └── ExampleInstrumentedTest.kt
    ├── proguard-rules.pro
    └── build.gradle
├── README.md
├── screenshot
    └── image.gif
├── gradle
    └── wrapper
    │   ├── gradle-wrapper.jar
    │   └── gradle-wrapper.properties
├── .gitignore
├── settings.gradle
├── gradle.properties
├── gradlew.bat
└── gradlew


/app/.gitignore:
--------------------------------------------------------------------------------
1 | /build


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
1 | ## Рыночный график на Compose
2 | 
3 | ![](screenshot/image.gif)
4 | 


--------------------------------------------------------------------------------
/screenshot/image.gif:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/ShirobokovNE/MarketChart/HEAD/screenshot/image.gif


--------------------------------------------------------------------------------
/app/src/main/res/values/strings.xml:
--------------------------------------------------------------------------------
1 | <resources>
2 |     <string name="app_name">MarketChart</string>
3 | </resources>


--------------------------------------------------------------------------------
/app/src/main/res/values/themes.xml:
--------------------------------------------------------------------------------
1 | <resources xmlns:tools="http://schemas.android.com/tools">
2 | 
3 | </resources>


--------------------------------------------------------------------------------
/app/src/main/res/values-night/themes.xml:
--------------------------------------------------------------------------------
1 | <resources xmlns:tools="http://schemas.android.com/tools">
2 | 
3 | </resources>


--------------------------------------------------------------------------------
/gradle/wrapper/gradle-wrapper.jar:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/ShirobokovNE/MarketChart/HEAD/gradle/wrapper/gradle-wrapper.jar


--------------------------------------------------------------------------------
/app/src/main/res/mipmap-hdpi/ic_launcher.webp:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/ShirobokovNE/MarketChart/HEAD/app/src/main/res/mipmap-hdpi/ic_launcher.webp


--------------------------------------------------------------------------------
/app/src/main/res/mipmap-mdpi/ic_launcher.webp:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/ShirobokovNE/MarketChart/HEAD/app/src/main/res/mipmap-mdpi/ic_launcher.webp


--------------------------------------------------------------------------------
/app/src/main/res/mipmap-xhdpi/ic_launcher.webp:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/ShirobokovNE/MarketChart/HEAD/app/src/main/res/mipmap-xhdpi/ic_launcher.webp


--------------------------------------------------------------------------------
/app/src/main/res/mipmap-xxhdpi/ic_launcher.webp:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/ShirobokovNE/MarketChart/HEAD/app/src/main/res/mipmap-xxhdpi/ic_launcher.webp


--------------------------------------------------------------------------------
/app/src/main/res/mipmap-xxxhdpi/ic_launcher.webp:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/ShirobokovNE/MarketChart/HEAD/app/src/main/res/mipmap-xxxhdpi/ic_launcher.webp


--------------------------------------------------------------------------------
/app/src/main/res/mipmap-hdpi/ic_launcher_round.webp:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/ShirobokovNE/MarketChart/HEAD/app/src/main/res/mipmap-hdpi/ic_launcher_round.webp


--------------------------------------------------------------------------------
/app/src/main/res/mipmap-mdpi/ic_launcher_round.webp:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/ShirobokovNE/MarketChart/HEAD/app/src/main/res/mipmap-mdpi/ic_launcher_round.webp


--------------------------------------------------------------------------------
/app/src/main/res/mipmap-xhdpi/ic_launcher_round.webp:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/ShirobokovNE/MarketChart/HEAD/app/src/main/res/mipmap-xhdpi/ic_launcher_round.webp


--------------------------------------------------------------------------------
/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.webp:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/ShirobokovNE/MarketChart/HEAD/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.webp


--------------------------------------------------------------------------------
/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.webp:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/ShirobokovNE/MarketChart/HEAD/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.webp


--------------------------------------------------------------------------------
/.gitignore:
--------------------------------------------------------------------------------
 1 | *.iml
 2 | .gradle
 3 | /local.properties
 4 | .idea
 5 | .DS_Store
 6 | /build
 7 | /captures
 8 | .externalNativeBuild
 9 | .cxx
10 | local.properties
11 | 


--------------------------------------------------------------------------------
/gradle/wrapper/gradle-wrapper.properties:
--------------------------------------------------------------------------------
1 | #Sun Sep 19 09:42:06 MSK 2021
2 | distributionBase=GRADLE_USER_HOME
3 | distributionUrl=https\://services.gradle.org/distributions/gradle-7.0.2-bin.zip
4 | distributionPath=wrapper/dists
5 | zipStorePath=wrapper/dists
6 | zipStoreBase=GRADLE_USER_HOME
7 | 


--------------------------------------------------------------------------------
/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml:
--------------------------------------------------------------------------------
1 | <?xml version="1.0" encoding="utf-8"?>
2 | <adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
3 |     <background android:drawable="@drawable/ic_launcher_background" />
4 |     <foreground android:drawable="@drawable/ic_launcher_foreground" />
5 | </adaptive-icon>


--------------------------------------------------------------------------------
/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml:
--------------------------------------------------------------------------------
1 | <?xml version="1.0" encoding="utf-8"?>
2 | <adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
3 |     <background android:drawable="@drawable/ic_launcher_background" />
4 |     <foreground android:drawable="@drawable/ic_launcher_foreground" />
5 | </adaptive-icon>


--------------------------------------------------------------------------------
/settings.gradle:
--------------------------------------------------------------------------------
 1 | dependencyResolutionManagement {
 2 |     repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
 3 |     repositories {
 4 |         google()
 5 |         mavenCentral()
 6 |         jcenter() // Warning: this repository is going to shut down soon
 7 |     }
 8 | }
 9 | rootProject.name = "MarketChart"
10 | include ':app'
11 | 


--------------------------------------------------------------------------------
/app/src/main/java/ru/shirobokov/marketchart/chart/Candle.kt:
--------------------------------------------------------------------------------
 1 | package ru.shirobokov.marketchart.chart
 2 | 
 3 | import java.time.LocalDateTime
 4 | 
 5 | data class Candle(
 6 |     val time: LocalDateTime,
 7 |     val open: Float,
 8 |     val close: Float,
 9 |     val high: Float,
10 |     val low: Float
11 | ) : Comparable<Candle> {
12 | 
13 |     override fun compareTo(other: Candle) = if (time.isBefore(other.time)) -1 else 1
14 | }
15 | 


--------------------------------------------------------------------------------
/app/src/main/res/values/colors.xml:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="utf-8"?>
 2 | <resources>
 3 |     <color name="purple_200">#FFBB86FC</color>
 4 |     <color name="purple_500">#FF6200EE</color>
 5 |     <color name="purple_700">#FF3700B3</color>
 6 |     <color name="teal_200">#FF03DAC5</color>
 7 |     <color name="teal_700">#FF018786</color>
 8 |     <color name="black">#FF000000</color>
 9 |     <color name="white">#FFFFFFFF</color>
10 | </resources>


--------------------------------------------------------------------------------
/app/src/test/java/ru/shirobokov/marketchart/ExampleUnitTest.kt:
--------------------------------------------------------------------------------
 1 | package ru.shirobokov.marketchart
 2 | 
 3 | import org.junit.Test
 4 | 
 5 | import org.junit.Assert.*
 6 | 
 7 | /**
 8 |  * Example local unit test, which will execute on the development machine (host).
 9 |  *
10 |  * See [testing documentation](http://d.android.com/tools/testing).
11 |  */
12 | class ExampleUnitTest {
13 |     @Test
14 |     fun addition_isCorrect() {
15 |         assertEquals(4, 2 + 2)
16 |     }
17 | }


--------------------------------------------------------------------------------
/app/src/androidTest/java/ru/shirobokov/marketchart/ExampleInstrumentedTest.kt:
--------------------------------------------------------------------------------
 1 | package ru.shirobokov.marketchart
 2 | 
 3 | import androidx.test.platform.app.InstrumentationRegistry
 4 | import androidx.test.ext.junit.runners.AndroidJUnit4
 5 | 
 6 | import org.junit.Test
 7 | import org.junit.runner.RunWith
 8 | 
 9 | import org.junit.Assert.*
10 | 
11 | /**
12 |  * Instrumented test, which will execute on an Android device.
13 |  *
14 |  * See [testing documentation](http://d.android.com/tools/testing).
15 |  */
16 | @RunWith(AndroidJUnit4::class)
17 | class ExampleInstrumentedTest {
18 |     @Test
19 |     fun useAppContext() {
20 |         // Context of the app under test.
21 |         val appContext = InstrumentationRegistry.getInstrumentation().targetContext
22 |         assertEquals("ru.shirobokov.e", appContext.packageName)
23 |     }
24 | }


--------------------------------------------------------------------------------
/app/proguard-rules.pro:
--------------------------------------------------------------------------------
 1 | # Add project specific ProGuard rules here.
 2 | # You can control the set of applied configuration files using the
 3 | # proguardFiles setting in build.gradle.
 4 | #
 5 | # For more details, see
 6 | #   http://developer.android.com/guide/developing/tools/proguard.html
 7 | 
 8 | # If your project uses WebView with JS, uncomment the following
 9 | # and specify the fully qualified class name to the JavaScript interface
10 | # class:
11 | #-keepclassmembers class fqcn.of.javascript.interface.for.webview {
12 | #   public *;
13 | #}
14 | 
15 | # Uncomment this to preserve the line number information for
16 | # debugging stack traces.
17 | #-keepattributes SourceFile,LineNumberTable
18 | 
19 | # If you keep the line number information, uncomment this to
20 | # hide the original source file name.
21 | #-renamesourcefileattribute SourceFile


--------------------------------------------------------------------------------
/app/src/main/AndroidManifest.xml:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="utf-8"?>
 2 | <manifest xmlns:android="http://schemas.android.com/apk/res/android"
 3 |     package="ru.shirobokov.marketchart">
 4 | 
 5 |     <application
 6 |         android:allowBackup="false"
 7 |         android:icon="@mipmap/ic_launcher"
 8 |         android:label="@string/app_name"
 9 |         android:roundIcon="@mipmap/ic_launcher_round"
10 |         android:supportsRtl="true">
11 | 
12 |         <activity
13 |             android:name=".ChartActivity"
14 |             android:exported="true"
15 |             android:theme="@style/Theme.AppCompat.DayNight.NoActionBar">
16 | 
17 |             <intent-filter>
18 |                 <action android:name="android.intent.action.MAIN" />
19 |                 <category android:name="android.intent.category.LAUNCHER" />
20 |             </intent-filter>
21 |         </activity>
22 |     </application>
23 | 
24 | </manifest>


--------------------------------------------------------------------------------
/gradle.properties:
--------------------------------------------------------------------------------
 1 | # Project-wide Gradle settings.
 2 | # IDE (e.g. Android Studio) users:
 3 | # Gradle settings configured through the IDE *will override*
 4 | # any settings specified in this file.
 5 | # For more details on how to configure your build environment visit
 6 | # http://www.gradle.org/docs/current/userguide/build_environment.html
 7 | # Specifies the JVM arguments used for the daemon process.
 8 | # The setting is particularly useful for tweaking memory settings.
 9 | org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8
10 | # When configured, Gradle will run in incubating parallel mode.
11 | # This option should only be used with decoupled projects. More details, visit
12 | # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
13 | # org.gradle.parallel=true
14 | # AndroidX package structure to make it clearer which packages are bundled with the
15 | # Android operating system, and which are packaged with your app"s APK
16 | # https://developer.android.com/topic/libraries/support-library/androidx-rn
17 | android.useAndroidX=true
18 | # Automatically convert third-party libraries to use AndroidX
19 | android.enableJetifier=true
20 | # Kotlin code style for this project: "official" or "obsolete":
21 | kotlin.code.style=official


--------------------------------------------------------------------------------
/app/src/main/java/ru/shirobokov/marketchart/ChartActivity.kt:
--------------------------------------------------------------------------------
 1 | package ru.shirobokov.marketchart
 2 | 
 3 | import MarketChart
 4 | import android.os.Bundle
 5 | import androidx.activity.compose.setContent
 6 | import androidx.appcompat.app.AppCompatActivity
 7 | import ru.shirobokov.marketchart.chart.Candle
 8 | import java.time.LocalDateTime
 9 | 
10 | class ChartActivity : AppCompatActivity() {
11 | 
12 |     override fun onCreate(savedInstanceState: Bundle?) {
13 |         super.onCreate(savedInstanceState)
14 |         val candles = mutableListOf<Candle>()
15 |         assets.open("quotes.txt").use {
16 |             it.bufferedReader().forEachLine { line ->
17 |                 val splitStrings = line.split(" ")
18 | 
19 |                 val year = splitStrings[0].substring(0, 4).toInt()
20 |                 val month = splitStrings[0].substring(4, 6).toInt()
21 |                 val day = splitStrings[0].substring(6, 8).toInt()
22 |                 val hour = splitStrings[1].substring(0, 2).toInt()
23 |                 val minute = splitStrings[1].substring(2, 4).toInt()
24 | 
25 |                 val dateTime = LocalDateTime.of(year, month, day, hour, minute)
26 |                 val open = splitStrings[2].toFloat()
27 |                 val high = splitStrings[3].toFloat()
28 |                 val low = splitStrings[4].toFloat()
29 |                 val close = splitStrings[5].toFloat()
30 | 
31 |                 candles.add(Candle(dateTime, open, close, high, low))
32 |             }
33 |             candles.sort()
34 |         }
35 | 
36 |         setContent {
37 |             MarketChart(candles)
38 |         }
39 |     }
40 | }
41 | 


--------------------------------------------------------------------------------
/app/build.gradle:
--------------------------------------------------------------------------------
 1 | plugins {
 2 |     id("com.android.application")
 3 |     id("kotlin-android")
 4 | }
 5 | 
 6 | android {
 7 |     compileSdk = 30
 8 |     buildToolsVersion = "30.0.3"
 9 | 
10 |     defaultConfig {
11 |         applicationId = "ru.shirobokov.marketchart"
12 |         minSdk = 21
13 |         targetSdk = 30
14 |         versionCode = 1
15 |         versionName = "1.0"
16 | 
17 |         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
18 |         vectorDrawables {
19 |             useSupportLibrary = true
20 |         }
21 |     }
22 |     compileOptions {
23 |         coreLibraryDesugaringEnabled = true
24 |         sourceCompatibility = JavaVersion.VERSION_1_8
25 |         targetCompatibility = JavaVersion.VERSION_1_8
26 |     }
27 |     kotlinOptions {
28 |         jvmTarget = "1.8"
29 |     }
30 |     buildFeatures {
31 |         compose = true
32 |     }
33 |     composeOptions {
34 |         kotlinCompilerExtensionVersion = "1.0.2"
35 |     }
36 | }
37 | 
38 | dependencies {
39 |     implementation("androidx.core:core-ktx:1.6.0")
40 |     implementation("androidx.appcompat:appcompat:1.3.1")
41 | 
42 |     implementation("androidx.compose.ui:ui:1.0.4")
43 |     implementation("androidx.compose.material:material:1.0.4")
44 |     implementation("androidx.compose.ui:ui-tooling:1.0.4")
45 |     implementation("androidx.activity:activity-compose:1.3.1")
46 | 
47 |     coreLibraryDesugaring("com.android.tools:desugar_jdk_libs:1.1.5")
48 | 
49 |     testImplementation("junit:junit:4.13.2")
50 |     androidTestImplementation("androidx.test.ext:junit:1.1.3")
51 |     androidTestImplementation("androidx.test.espresso:espresso-core:3.4.0")
52 | }


--------------------------------------------------------------------------------
/app/src/main/res/drawable-v24/ic_launcher_foreground.xml:
--------------------------------------------------------------------------------
 1 | <vector xmlns:android="http://schemas.android.com/apk/res/android"
 2 |     xmlns:aapt="http://schemas.android.com/aapt"
 3 |     android:width="108dp"
 4 |     android:height="108dp"
 5 |     android:viewportWidth="108"
 6 |     android:viewportHeight="108">
 7 |     <path android:pathData="M31,63.928c0,0 6.4,-11 12.1,-13.1c7.2,-2.6 26,-1.4 26,-1.4l38.1,38.1L107,108.928l-32,-1L31,63.928z">
 8 |         <aapt:attr name="android:fillColor">
 9 |             <gradient
10 |                 android:endX="85.84757"
11 |                 android:endY="92.4963"
12 |                 android:startX="42.9492"
13 |                 android:startY="49.59793"
14 |                 android:type="linear">
15 |                 <item
16 |                     android:color="#44000000"
17 |                     android:offset="0.0" />
18 |                 <item
19 |                     android:color="#00000000"
20 |                     android:offset="1.0" />
21 |             </gradient>
22 |         </aapt:attr>
23 |     </path>
24 |     <path
25 |         android:fillColor="#FFFFFF"
26 |         android:fillType="nonZero"
27 |         android:pathData="M65.3,45.828l3.8,-6.6c0.2,-0.4 0.1,-0.9 -0.3,-1.1c-0.4,-0.2 -0.9,-0.1 -1.1,0.3l-3.9,6.7c-6.3,-2.8 -13.4,-2.8 -19.7,0l-3.9,-6.7c-0.2,-0.4 -0.7,-0.5 -1.1,-0.3C38.8,38.328 38.7,38.828 38.9,39.228l3.8,6.6C36.2,49.428 31.7,56.028 31,63.928h46C76.3,56.028 71.8,49.428 65.3,45.828zM43.4,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2c-0.3,-0.7 -0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C45.3,56.528 44.5,57.328 43.4,57.328L43.4,57.328zM64.6,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2s-0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C66.5,56.528 65.6,57.328 64.6,57.328L64.6,57.328z"
28 |         android:strokeWidth="1"
29 |         android:strokeColor="#00000000" />
30 | </vector>


--------------------------------------------------------------------------------
/gradlew.bat:
--------------------------------------------------------------------------------
 1 | @rem
 2 | @rem Copyright 2015 the original author or authors.
 3 | @rem
 4 | @rem Licensed under the Apache License, Version 2.0 (the "License");
 5 | @rem you may not use this file except in compliance with the License.
 6 | @rem You may obtain a copy of the License at
 7 | @rem
 8 | @rem      https://www.apache.org/licenses/LICENSE-2.0
 9 | @rem
10 | @rem Unless required by applicable law or agreed to in writing, software
11 | @rem distributed under the License is distributed on an "AS IS" BASIS,
12 | @rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 | @rem See the License for the specific language governing permissions and
14 | @rem limitations under the License.
15 | @rem
16 | 
17 | @if "%DEBUG%" == "" @echo off
18 | @rem ##########################################################################
19 | @rem
20 | @rem  Gradle startup script for Windows
21 | @rem
22 | @rem ##########################################################################
23 | 
24 | @rem Set local scope for the variables with windows NT shell
25 | if "%OS%"=="Windows_NT" setlocal
26 | 
27 | set DIRNAME=%~dp0
28 | if "%DIRNAME%" == "" set DIRNAME=.
29 | set APP_BASE_NAME=%~n0
30 | set APP_HOME=%DIRNAME%
31 | 
32 | @rem Resolve any "." and ".." in APP_HOME to make it shorter.
33 | for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
34 | 
35 | @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
36 | set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
37 | 
38 | @rem Find java.exe
39 | if defined JAVA_HOME goto findJavaFromJavaHome
40 | 
41 | set JAVA_EXE=java.exe
42 | %JAVA_EXE% -version >NUL 2>&1
43 | if "%ERRORLEVEL%" == "0" goto execute
44 | 
45 | echo.
46 | echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
47 | echo.
48 | echo Please set the JAVA_HOME variable in your environment to match the
49 | echo location of your Java installation.
50 | 
51 | goto fail
52 | 
53 | :findJavaFromJavaHome
54 | set JAVA_HOME=%JAVA_HOME:"=%
55 | set JAVA_EXE=%JAVA_HOME%/bin/java.exe
56 | 
57 | if exist "%JAVA_EXE%" goto execute
58 | 
59 | echo.
60 | echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
61 | echo.
62 | echo Please set the JAVA_HOME variable in your environment to match the
63 | echo location of your Java installation.
64 | 
65 | goto fail
66 | 
67 | :execute
68 | @rem Setup the command line
69 | 
70 | set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
71 | 
72 | 
73 | @rem Execute Gradle
74 | "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
75 | 
76 | :end
77 | @rem End local scope for the variables with windows NT shell
78 | if "%ERRORLEVEL%"=="0" goto mainEnd
79 | 
80 | :fail
81 | rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
82 | rem the _cmd.exe /c_ return code!
83 | if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
84 | exit /b 1
85 | 
86 | :mainEnd
87 | if "%OS%"=="Windows_NT" endlocal
88 | 
89 | :omega
90 | 


--------------------------------------------------------------------------------
/app/src/main/java/ru/shirobokov/marketchart/chart/MarketChartState.kt:
--------------------------------------------------------------------------------
  1 | package ru.shirobokov.marketchart.chart
  2 | 
  3 | import androidx.compose.foundation.gestures.ScrollableState
  4 | import androidx.compose.foundation.gestures.TransformableState
  5 | import androidx.compose.runtime.derivedStateOf
  6 | import androidx.compose.runtime.getValue
  7 | import androidx.compose.runtime.mutableStateOf
  8 | import androidx.compose.runtime.saveable.Saver
  9 | import androidx.compose.runtime.saveable.listSaver
 10 | import androidx.compose.runtime.setValue
 11 | import kotlin.math.roundToInt
 12 | 
 13 | class MarketChartState {
 14 | 
 15 |     private var candles = listOf<Candle>()
 16 |     private var visibleCandleCount by mutableStateOf(0)
 17 |     private var scrollOffset by mutableStateOf(0f)
 18 |     private var viewWidth = 0f
 19 |     private var viewHeight = 0f
 20 |     private var candleInGrid = Float.MAX_VALUE
 21 | 
 22 |     private val maxPrice by derivedStateOf { visibleCandles.maxOfOrNull { it.high } ?: 0f }
 23 |     private val minPrice by derivedStateOf { visibleCandles.minOfOrNull { it.low } ?: 0f }
 24 | 
 25 |     val transformableState = TransformableState { zoomChange, _, _ -> scaleView(zoomChange) }
 26 | 
 27 |     val scrollableState = ScrollableState {
 28 |         scrollOffset = if (it > 0) {
 29 |             (scrollOffset - it.scrolledCandles).coerceAtLeast(0f)
 30 |         } else {
 31 |             (scrollOffset - it.scrolledCandles).coerceAtMost(candles.lastIndex.toFloat())
 32 |         }
 33 |         it
 34 |     }
 35 | 
 36 |     private val Float.scrolledCandles: Float
 37 |         get() = this * visibleCandleCount.toFloat() / viewWidth
 38 | 
 39 |     var timeLines by mutableStateOf(listOf<Candle>())
 40 | 
 41 |     val priceLines by derivedStateOf {
 42 |         val priceItem = (maxPrice - minPrice) / PRICES_COUNT
 43 |         mutableListOf<Float>().apply { repeat(PRICES_COUNT) { if (it > 0) add(maxPrice - priceItem * it) } }
 44 |     }
 45 | 
 46 |     val visibleCandles by derivedStateOf {
 47 |         if (candles.isNotEmpty()) {
 48 |             candles.subList(
 49 |                 scrollOffset.roundToInt().coerceAtLeast(0),
 50 |                 (scrollOffset.roundToInt() + visibleCandleCount).coerceAtMost(candles.size)
 51 |             )
 52 |         } else {
 53 |             emptyList()
 54 |         }
 55 |     }
 56 | 
 57 |     private fun scaleView(zoomChange: Float) {
 58 |         if ((zoomChange < 1f && visibleCandleCount / zoomChange <= MAX_CANDLES) ||
 59 |             (zoomChange > 1f && visibleCandleCount / zoomChange >= MIN_CANDLES)
 60 |         ) {
 61 |             visibleCandleCount = (visibleCandleCount / zoomChange).roundToInt()
 62 |         }
 63 |     }
 64 | 
 65 |     fun setViewSize(width: Float, height: Float) {
 66 |         viewWidth = width
 67 |         viewHeight = height
 68 |     }
 69 | 
 70 |     fun calculateGridWidth() {
 71 |         val candleWidth = viewWidth / visibleCandleCount
 72 |         val currentGridWidth = candleInGrid * candleWidth
 73 |         when {
 74 |             currentGridWidth < MIN_GRID_WIDTH -> {
 75 |                 candleInGrid = MAX_GRID_WIDTH / candleWidth
 76 |                 timeLines = candles.filterIndexed { index, _ -> index % candleInGrid.roundToInt() == 0 }
 77 |             }
 78 |             currentGridWidth > MAX_GRID_WIDTH -> {
 79 |                 candleInGrid = MIN_GRID_WIDTH / candleWidth
 80 |                 timeLines = candles.filterIndexed { index, _ -> index % candleInGrid.roundToInt() == 0 }
 81 |             }
 82 |         }
 83 |     }
 84 | 
 85 |     fun xOffset(candle: Candle) = viewWidth * visibleCandles.indexOf(candle).toFloat() / visibleCandleCount.toFloat()
 86 |     fun yOffset(value: Float) = viewHeight * (maxPrice - value) / (maxPrice - minPrice)
 87 | 
 88 |     companion object {
 89 |         private const val MAX_GRID_WIDTH = 500
 90 |         private const val MIN_GRID_WIDTH = 250
 91 |         private const val MAX_CANDLES = 100
 92 |         private const val MIN_CANDLES = 30
 93 |         private const val START_CANDLES = 60
 94 |         private const val PRICES_COUNT = 10
 95 | 
 96 |         fun getState(candles: List<Candle>, visibleCandleCount: Int? = null, scrollOffset: Float? = null) =
 97 |             MarketChartState().apply {
 98 |                 this.candles = candles
 99 |                 this.visibleCandleCount = visibleCandleCount ?: START_CANDLES
100 |                 this.scrollOffset = scrollOffset ?: candles.size.toFloat() - this.visibleCandleCount
101 |             }
102 | 
103 |         @Suppress("UNCHECKED_CAST")
104 |         val Saver: Saver<MarketChartState, Any> = listSaver(
105 |             save = { listOf(it.candles, it.scrollOffset, it.visibleCandleCount) },
106 |             restore = {
107 |                 getState(
108 |                     candles = it[0] as List<Candle>,
109 |                     visibleCandleCount = it[2] as Int,
110 |                     scrollOffset = it[1] as Float
111 |                 )
112 |             }
113 |         )
114 |     }
115 | }
116 | 


--------------------------------------------------------------------------------
/app/src/main/res/drawable/ic_launcher_background.xml:
--------------------------------------------------------------------------------
  1 | <?xml version="1.0" encoding="utf-8"?>
  2 | <vector xmlns:android="http://schemas.android.com/apk/res/android"
  3 |     android:width="108dp"
  4 |     android:height="108dp"
  5 |     android:viewportWidth="108"
  6 |     android:viewportHeight="108">
  7 |     <path
  8 |         android:fillColor="#3DDC84"
  9 |         android:pathData="M0,0h108v108h-108z" />
 10 |     <path
 11 |         android:fillColor="#00000000"
 12 |         android:pathData="M9,0L9,108"
 13 |         android:strokeWidth="0.8"
 14 |         android:strokeColor="#33FFFFFF" />
 15 |     <path
 16 |         android:fillColor="#00000000"
 17 |         android:pathData="M19,0L19,108"
 18 |         android:strokeWidth="0.8"
 19 |         android:strokeColor="#33FFFFFF" />
 20 |     <path
 21 |         android:fillColor="#00000000"
 22 |         android:pathData="M29,0L29,108"
 23 |         android:strokeWidth="0.8"
 24 |         android:strokeColor="#33FFFFFF" />
 25 |     <path
 26 |         android:fillColor="#00000000"
 27 |         android:pathData="M39,0L39,108"
 28 |         android:strokeWidth="0.8"
 29 |         android:strokeColor="#33FFFFFF" />
 30 |     <path
 31 |         android:fillColor="#00000000"
 32 |         android:pathData="M49,0L49,108"
 33 |         android:strokeWidth="0.8"
 34 |         android:strokeColor="#33FFFFFF" />
 35 |     <path
 36 |         android:fillColor="#00000000"
 37 |         android:pathData="M59,0L59,108"
 38 |         android:strokeWidth="0.8"
 39 |         android:strokeColor="#33FFFFFF" />
 40 |     <path
 41 |         android:fillColor="#00000000"
 42 |         android:pathData="M69,0L69,108"
 43 |         android:strokeWidth="0.8"
 44 |         android:strokeColor="#33FFFFFF" />
 45 |     <path
 46 |         android:fillColor="#00000000"
 47 |         android:pathData="M79,0L79,108"
 48 |         android:strokeWidth="0.8"
 49 |         android:strokeColor="#33FFFFFF" />
 50 |     <path
 51 |         android:fillColor="#00000000"
 52 |         android:pathData="M89,0L89,108"
 53 |         android:strokeWidth="0.8"
 54 |         android:strokeColor="#33FFFFFF" />
 55 |     <path
 56 |         android:fillColor="#00000000"
 57 |         android:pathData="M99,0L99,108"
 58 |         android:strokeWidth="0.8"
 59 |         android:strokeColor="#33FFFFFF" />
 60 |     <path
 61 |         android:fillColor="#00000000"
 62 |         android:pathData="M0,9L108,9"
 63 |         android:strokeWidth="0.8"
 64 |         android:strokeColor="#33FFFFFF" />
 65 |     <path
 66 |         android:fillColor="#00000000"
 67 |         android:pathData="M0,19L108,19"
 68 |         android:strokeWidth="0.8"
 69 |         android:strokeColor="#33FFFFFF" />
 70 |     <path
 71 |         android:fillColor="#00000000"
 72 |         android:pathData="M0,29L108,29"
 73 |         android:strokeWidth="0.8"
 74 |         android:strokeColor="#33FFFFFF" />
 75 |     <path
 76 |         android:fillColor="#00000000"
 77 |         android:pathData="M0,39L108,39"
 78 |         android:strokeWidth="0.8"
 79 |         android:strokeColor="#33FFFFFF" />
 80 |     <path
 81 |         android:fillColor="#00000000"
 82 |         android:pathData="M0,49L108,49"
 83 |         android:strokeWidth="0.8"
 84 |         android:strokeColor="#33FFFFFF" />
 85 |     <path
 86 |         android:fillColor="#00000000"
 87 |         android:pathData="M0,59L108,59"
 88 |         android:strokeWidth="0.8"
 89 |         android:strokeColor="#33FFFFFF" />
 90 |     <path
 91 |         android:fillColor="#00000000"
 92 |         android:pathData="M0,69L108,69"
 93 |         android:strokeWidth="0.8"
 94 |         android:strokeColor="#33FFFFFF" />
 95 |     <path
 96 |         android:fillColor="#00000000"
 97 |         android:pathData="M0,79L108,79"
 98 |         android:strokeWidth="0.8"
 99 |         android:strokeColor="#33FFFFFF" />
100 |     <path
101 |         android:fillColor="#00000000"
102 |         android:pathData="M0,89L108,89"
103 |         android:strokeWidth="0.8"
104 |         android:strokeColor="#33FFFFFF" />
105 |     <path
106 |         android:fillColor="#00000000"
107 |         android:pathData="M0,99L108,99"
108 |         android:strokeWidth="0.8"
109 |         android:strokeColor="#33FFFFFF" />
110 |     <path
111 |         android:fillColor="#00000000"
112 |         android:pathData="M19,29L89,29"
113 |         android:strokeWidth="0.8"
114 |         android:strokeColor="#33FFFFFF" />
115 |     <path
116 |         android:fillColor="#00000000"
117 |         android:pathData="M19,39L89,39"
118 |         android:strokeWidth="0.8"
119 |         android:strokeColor="#33FFFFFF" />
120 |     <path
121 |         android:fillColor="#00000000"
122 |         android:pathData="M19,49L89,49"
123 |         android:strokeWidth="0.8"
124 |         android:strokeColor="#33FFFFFF" />
125 |     <path
126 |         android:fillColor="#00000000"
127 |         android:pathData="M19,59L89,59"
128 |         android:strokeWidth="0.8"
129 |         android:strokeColor="#33FFFFFF" />
130 |     <path
131 |         android:fillColor="#00000000"
132 |         android:pathData="M19,69L89,69"
133 |         android:strokeWidth="0.8"
134 |         android:strokeColor="#33FFFFFF" />
135 |     <path
136 |         android:fillColor="#00000000"
137 |         android:pathData="M19,79L89,79"
138 |         android:strokeWidth="0.8"
139 |         android:strokeColor="#33FFFFFF" />
140 |     <path
141 |         android:fillColor="#00000000"
142 |         android:pathData="M29,19L29,89"
143 |         android:strokeWidth="0.8"
144 |         android:strokeColor="#33FFFFFF" />
145 |     <path
146 |         android:fillColor="#00000000"
147 |         android:pathData="M39,19L39,89"
148 |         android:strokeWidth="0.8"
149 |         android:strokeColor="#33FFFFFF" />
150 |     <path
151 |         android:fillColor="#00000000"
152 |         android:pathData="M49,19L49,89"
153 |         android:strokeWidth="0.8"
154 |         android:strokeColor="#33FFFFFF" />
155 |     <path
156 |         android:fillColor="#00000000"
157 |         android:pathData="M59,19L59,89"
158 |         android:strokeWidth="0.8"
159 |         android:strokeColor="#33FFFFFF" />
160 |     <path
161 |         android:fillColor="#00000000"
162 |         android:pathData="M69,19L69,89"
163 |         android:strokeWidth="0.8"
164 |         android:strokeColor="#33FFFFFF" />
165 |     <path
166 |         android:fillColor="#00000000"
167 |         android:pathData="M79,19L79,89"
168 |         android:strokeWidth="0.8"
169 |         android:strokeColor="#33FFFFFF" />
170 | </vector>
171 | 


--------------------------------------------------------------------------------
/gradlew:
--------------------------------------------------------------------------------
  1 | #!/usr/bin/env sh
  2 | 
  3 | #
  4 | # Copyright 2015 the original author or authors.
  5 | #
  6 | # Licensed under the Apache License, Version 2.0 (the "License");
  7 | # you may not use this file except in compliance with the License.
  8 | # You may obtain a copy of the License at
  9 | #
 10 | #      https://www.apache.org/licenses/LICENSE-2.0
 11 | #
 12 | # Unless required by applicable law or agreed to in writing, software
 13 | # distributed under the License is distributed on an "AS IS" BASIS,
 14 | # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 15 | # See the License for the specific language governing permissions and
 16 | # limitations under the License.
 17 | #
 18 | 
 19 | ##############################################################################
 20 | ##
 21 | ##  Gradle start up script for UN*X
 22 | ##
 23 | ##############################################################################
 24 | 
 25 | # Attempt to set APP_HOME
 26 | # Resolve links: $0 may be a link
 27 | PRG="$0"
 28 | # Need this for relative symlinks.
 29 | while [ -h "$PRG" ] ; do
 30 |     ls=`ls -ld "$PRG"`
 31 |     link=`expr "$ls" : '.*-> \(.*\)$'`
 32 |     if expr "$link" : '/.*' > /dev/null; then
 33 |         PRG="$link"
 34 |     else
 35 |         PRG=`dirname "$PRG"`"/$link"
 36 |     fi
 37 | done
 38 | SAVED="`pwd`"
 39 | cd "`dirname \"$PRG\"`/" >/dev/null
 40 | APP_HOME="`pwd -P`"
 41 | cd "$SAVED" >/dev/null
 42 | 
 43 | APP_NAME="Gradle"
 44 | APP_BASE_NAME=`basename "$0"`
 45 | 
 46 | # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
 47 | DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
 48 | 
 49 | # Use the maximum available, or set MAX_FD != -1 to use that value.
 50 | MAX_FD="maximum"
 51 | 
 52 | warn () {
 53 |     echo "$*"
 54 | }
 55 | 
 56 | die () {
 57 |     echo
 58 |     echo "$*"
 59 |     echo
 60 |     exit 1
 61 | }
 62 | 
 63 | # OS specific support (must be 'true' or 'false').
 64 | cygwin=false
 65 | msys=false
 66 | darwin=false
 67 | nonstop=false
 68 | case "`uname`" in
 69 |   CYGWIN* )
 70 |     cygwin=true
 71 |     ;;
 72 |   Darwin* )
 73 |     darwin=true
 74 |     ;;
 75 |   MINGW* )
 76 |     msys=true
 77 |     ;;
 78 |   NONSTOP* )
 79 |     nonstop=true
 80 |     ;;
 81 | esac
 82 | 
 83 | CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
 84 | 
 85 | 
 86 | # Determine the Java command to use to start the JVM.
 87 | if [ -n "$JAVA_HOME" ] ; then
 88 |     if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
 89 |         # IBM's JDK on AIX uses strange locations for the executables
 90 |         JAVACMD="$JAVA_HOME/jre/sh/java"
 91 |     else
 92 |         JAVACMD="$JAVA_HOME/bin/java"
 93 |     fi
 94 |     if [ ! -x "$JAVACMD" ] ; then
 95 |         die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
 96 | 
 97 | Please set the JAVA_HOME variable in your environment to match the
 98 | location of your Java installation."
 99 |     fi
100 | else
101 |     JAVACMD="java"
102 |     which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
103 | 
104 | Please set the JAVA_HOME variable in your environment to match the
105 | location of your Java installation."
106 | fi
107 | 
108 | # Increase the maximum file descriptors if we can.
109 | if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
110 |     MAX_FD_LIMIT=`ulimit -H -n`
111 |     if [ $? -eq 0 ] ; then
112 |         if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
113 |             MAX_FD="$MAX_FD_LIMIT"
114 |         fi
115 |         ulimit -n $MAX_FD
116 |         if [ $? -ne 0 ] ; then
117 |             warn "Could not set maximum file descriptor limit: $MAX_FD"
118 |         fi
119 |     else
120 |         warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
121 |     fi
122 | fi
123 | 
124 | # For Darwin, add options to specify how the application appears in the dock
125 | if $darwin; then
126 |     GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
127 | fi
128 | 
129 | # For Cygwin or MSYS, switch paths to Windows format before running java
130 | if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
131 |     APP_HOME=`cygpath --path --mixed "$APP_HOME"`
132 |     CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
133 | 
134 |     JAVACMD=`cygpath --unix "$JAVACMD"`
135 | 
136 |     # We build the pattern for arguments to be converted via cygpath
137 |     ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
138 |     SEP=""
139 |     for dir in $ROOTDIRSRAW ; do
140 |         ROOTDIRS="$ROOTDIRS$SEP$dir"
141 |         SEP="|"
142 |     done
143 |     OURCYGPATTERN="(^($ROOTDIRS))"
144 |     # Add a user-defined pattern to the cygpath arguments
145 |     if [ "$GRADLE_CYGPATTERN" != "" ] ; then
146 |         OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
147 |     fi
148 |     # Now convert the arguments - kludge to limit ourselves to /bin/sh
149 |     i=0
150 |     for arg in "$@" ; do
151 |         CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
152 |         CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
153 | 
154 |         if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
155 |             eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
156 |         else
157 |             eval `echo args$i`="\"$arg\""
158 |         fi
159 |         i=`expr $i + 1`
160 |     done
161 |     case $i in
162 |         0) set -- ;;
163 |         1) set -- "$args0" ;;
164 |         2) set -- "$args0" "$args1" ;;
165 |         3) set -- "$args0" "$args1" "$args2" ;;
166 |         4) set -- "$args0" "$args1" "$args2" "$args3" ;;
167 |         5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
168 |         6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
169 |         7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
170 |         8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
171 |         9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
172 |     esac
173 | fi
174 | 
175 | # Escape application args
176 | save () {
177 |     for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
178 |     echo " "
179 | }
180 | APP_ARGS=`save "$@"`
181 | 
182 | # Collect all arguments for the java command, following the shell quoting and substitution rules
183 | eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
184 | 
185 | exec "$JAVACMD" "$@"
186 | 


--------------------------------------------------------------------------------
/app/src/main/java/ru/shirobokov/marketchart/chart/MarketChart.kt:
--------------------------------------------------------------------------------
  1 | import android.graphics.Rect
  2 | import androidx.compose.foundation.Canvas
  3 | import androidx.compose.foundation.background
  4 | import androidx.compose.foundation.gestures.Orientation
  5 | import androidx.compose.foundation.gestures.scrollable
  6 | import androidx.compose.foundation.gestures.transformable
  7 | import androidx.compose.foundation.layout.BoxWithConstraints
  8 | import androidx.compose.foundation.layout.fillMaxSize
  9 | import androidx.compose.runtime.Composable
 10 | import androidx.compose.runtime.saveable.rememberSaveable
 11 | import androidx.compose.ui.Modifier
 12 | import androidx.compose.ui.geometry.Offset
 13 | import androidx.compose.ui.geometry.Size
 14 | import androidx.compose.ui.graphics.Color
 15 | import androidx.compose.ui.graphics.Paint
 16 | import androidx.compose.ui.graphics.PathEffect
 17 | import androidx.compose.ui.graphics.drawscope.drawIntoCanvas
 18 | import androidx.compose.ui.graphics.nativeCanvas
 19 | import androidx.compose.ui.graphics.toArgb
 20 | import androidx.compose.ui.tooling.preview.Devices
 21 | import androidx.compose.ui.tooling.preview.Preview
 22 | import androidx.compose.ui.unit.dp
 23 | import androidx.compose.ui.unit.sp
 24 | import ru.shirobokov.marketchart.chart.Candle
 25 | import ru.shirobokov.marketchart.chart.MarketChartState
 26 | import java.text.DecimalFormat
 27 | import java.time.LocalDateTime
 28 | import java.time.format.DateTimeFormatter
 29 | 
 30 | @Composable
 31 | fun MarketChart(candles: List<Candle>) {
 32 | 
 33 |     val state = rememberSaveable(saver = MarketChartState.Saver) { MarketChartState.getState(candles) }
 34 | 
 35 |     val decimalFormat = DecimalFormat("##.00")
 36 |     val timeFormatter = DateTimeFormatter.ofPattern("dd.MM, HH:mm")
 37 |     val bounds = Rect()
 38 |     val textPaint = Paint().asFrameworkPaint().apply {
 39 |         isAntiAlias = true
 40 |         textSize = 35.sp.value
 41 |         color = Color.White.toArgb()
 42 |     }
 43 | 
 44 |     BoxWithConstraints(modifier = Modifier.fillMaxSize()) {
 45 |         val chartWidth = constraints.maxWidth - 128.dp.value
 46 |         val chartHeight = constraints.maxHeight - 64.dp.value
 47 | 
 48 |         state.setViewSize(chartWidth, chartHeight)
 49 |         state.calculateGridWidth()
 50 | 
 51 |         Canvas(
 52 |             modifier = Modifier
 53 |                 .fillMaxSize()
 54 |                 .background(Color(0xFF182028))
 55 |                 .scrollable(state.scrollableState, Orientation.Horizontal)
 56 |                 .transformable(state.transformableState)
 57 |         ) {
 58 |             drawLine(
 59 |                 color = Color.White,
 60 |                 strokeWidth = 2.dp.value,
 61 |                 start = Offset(0f, chartHeight),
 62 |                 end = Offset(chartWidth, chartHeight)
 63 |             )
 64 | 
 65 |             drawLine(
 66 |                 color = Color.White,
 67 |                 strokeWidth = 2.dp.value,
 68 |                 start = Offset(chartWidth, 0f),
 69 |                 end = Offset(chartWidth, chartHeight)
 70 |             )
 71 | 
 72 |             state.timeLines.forEach { candle ->
 73 |                 val offset = state.xOffset(candle)
 74 |                 if (offset !in 0f..chartWidth) return@forEach
 75 |                 drawLine(
 76 |                     color = Color.White,
 77 |                     strokeWidth = 1.dp.value,
 78 |                     start = Offset(offset, 0f),
 79 |                     end = Offset(offset, chartHeight),
 80 |                     pathEffect = PathEffect.dashPathEffect(intervals = floatArrayOf(10f, 20f), phase = 5f)
 81 |                 )
 82 |                 drawIntoCanvas {
 83 |                     val text = candle.time.format(timeFormatter)
 84 |                     textPaint.getTextBounds(text, 0, text.length, bounds)
 85 |                     val textHeight = bounds.height()
 86 |                     val textWidth = bounds.width()
 87 |                     it.nativeCanvas.drawText(
 88 |                         text,
 89 |                         offset - textWidth / 2,
 90 |                         chartHeight + 8.dp.value + textHeight,
 91 |                         textPaint
 92 |                     )
 93 |                 }
 94 |             }
 95 | 
 96 |             state.priceLines.forEach { value: Float ->
 97 |                 val yOffset = state.yOffset(value)
 98 |                 val text = decimalFormat.format(value)
 99 |                 drawLine(
100 |                     color = Color.White,
101 |                     strokeWidth = 1.dp.value,
102 |                     start = Offset(0f, yOffset),
103 |                     end = Offset(chartWidth, yOffset),
104 |                     pathEffect = PathEffect.dashPathEffect(intervals = floatArrayOf(10f, 20f), phase = 5f)
105 |                 )
106 |                 drawIntoCanvas {
107 |                     textPaint.getTextBounds(text, 0, text.length, bounds)
108 |                     val textHeight = bounds.height()
109 |                     it.nativeCanvas.drawText(
110 |                         text,
111 |                         chartWidth + 8.dp.value,
112 |                         yOffset + textHeight / 2,
113 |                         textPaint
114 |                     )
115 |                 }
116 |             }
117 | 
118 |             state.visibleCandles.forEach { candle ->
119 |                 val xOffset = state.xOffset(candle)
120 |                 drawLine(
121 |                     color = Color.White,
122 |                     strokeWidth = 2.dp.value,
123 |                     start = Offset(xOffset, state.yOffset(candle.low)),
124 |                     end = Offset(xOffset, state.yOffset(candle.high))
125 |                 )
126 |                 if (candle.open > candle.close) {
127 |                     drawRect(
128 |                         color = Color.Red,
129 |                         topLeft = Offset(xOffset - 6.dp.value, state.yOffset(candle.open)),
130 |                         size = Size(12.dp.value, state.yOffset(candle.close) - state.yOffset(candle.open))
131 |                     )
132 |                 } else {
133 |                     drawRect(
134 |                         color = Color.Green,
135 |                         topLeft = Offset(xOffset - 6.dp.value, state.yOffset(candle.close)),
136 |                         size = Size(12.dp.value, state.yOffset(candle.open) - state.yOffset(candle.close))
137 |                     )
138 |                 }
139 |             }
140 |         }
141 |     }
142 | }
143 | 
144 | @Preview(device = Devices.PIXEL_2)
145 | @Composable
146 | fun MarketChartPreview() {
147 |     MarketChart(
148 |         listOf(
149 |             Candle(LocalDateTime.now().plusHours(21), 16f, 20f, 22f, 15f),
150 |             Candle(LocalDateTime.now().plusHours(20), 11f, 16f, 16f, 10f),
151 |             Candle(LocalDateTime.now().plusHours(19), 8f, 10f, 11f, 7f),
152 |             Candle(LocalDateTime.now().plusHours(18), 6f, 8f, 9f, 5f),
153 |             Candle(LocalDateTime.now().plusHours(17), 10f, 6f, 11f, 6f),
154 |             Candle(LocalDateTime.now().plusHours(16), 14f, 10f, 15f, 10f),
155 |             Candle(LocalDateTime.now().plusHours(15), 12f, 14f, 15f, 10f),
156 |             Candle(LocalDateTime.now().plusHours(14), 10f, 12f, 13f, 10f),
157 |             Candle(LocalDateTime.now().plusHours(13), 15f, 10f, 16f, 9f),
158 |             Candle(LocalDateTime.now().plusHours(12), 14f, 15f, 15f, 12f),
159 |             Candle(LocalDateTime.now().plusHours(11), 14f, 14f, 15f, 10f),
160 |             Candle(LocalDateTime.now().plusHours(10), 12f, 14f, 15f, 10f),
161 |             Candle(LocalDateTime.now().plusHours(9), 10f, 12f, 13f, 10f),
162 |             Candle(LocalDateTime.now().plusHours(8), 11f, 10f, 16f, 9f),
163 |             Candle(LocalDateTime.now().plusHours(7), 10f, 11f, 12f, 10f),
164 |             Candle(LocalDateTime.now().plusHours(6), 6f, 10f, 12f, 4f),
165 |             Candle(LocalDateTime.now().plusHours(5), 4f, 6f, 7f, 4f),
166 |             Candle(LocalDateTime.now().plusHours(4), 6f, 4f, 8f, 4f),
167 |             Candle(LocalDateTime.now().plusHours(3), 3f, 6f, 6f, 2f),
168 |             Candle(LocalDateTime.now().plusHours(2), 4f, 3f, 5f, 2f),
169 |             Candle(LocalDateTime.now().plusHours(1), 2f, 4f, 6f, 1f)
170 |         ).sorted()
171 |     )
172 | }
173 | 


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