├── .gitignore
├── .idea
├── .gitignore
├── .name
├── compiler.xml
├── gradle.xml
├── kotlinc.xml
├── misc.xml
└── vcs.xml
├── LICENSE
├── README.md
├── app
├── .gitignore
├── build.gradle.kts
├── proguard-rules.pro
└── src
│ ├── androidTest
│ └── java
│ │ └── com
│ │ └── jgomezdev
│ │ └── draganddroplibreary
│ │ └── ExampleInstrumentedTest.kt
│ ├── main
│ ├── AndroidManifest.xml
│ ├── java
│ │ └── com
│ │ │ └── jgomezdev
│ │ │ └── draganddroplibreary
│ │ │ └── MainActivity.kt
│ └── res
│ │ ├── drawable
│ │ ├── ic_launcher_background.xml
│ │ └── ic_launcher_foreground.xml
│ │ ├── layout
│ │ └── activity_main.xml
│ │ ├── mipmap-anydpi
│ │ ├── ic_launcher.xml
│ │ └── ic_launcher_round.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
│ │ ├── values-night
│ │ └── themes.xml
│ │ ├── values
│ │ ├── colors.xml
│ │ ├── strings.xml
│ │ └── themes.xml
│ │ └── xml
│ │ ├── backup_rules.xml
│ │ └── data_extraction_rules.xml
│ └── test
│ └── java
│ └── com
│ └── jgomezdev
│ └── draganddroplibreary
│ └── ExampleUnitTest.kt
├── build.gradle.kts
├── drag-and-drop-compose
├── .gitignore
├── build.gradle.kts
├── consumer-rules.pro
├── proguard-rules.pro
└── src
│ ├── androidTest
│ └── java
│ │ └── com
│ │ └── jgomezdev
│ │ └── draganddropcompose
│ │ └── ExampleInstrumentedTest.kt
│ ├── main
│ ├── AndroidManifest.xml
│ └── java
│ │ └── com
│ │ └── jgomezdev
│ │ └── draganddropcompose
│ │ ├── DragAndDrop.kt
│ │ └── SlideState.kt
│ └── test
│ └── java
│ └── com
│ └── jgomezdev
│ └── draganddropcompose
│ └── ExampleUnitTest.kt
├── gradle.properties
├── gradle
└── wrapper
│ ├── gradle-wrapper.jar
│ └── gradle-wrapper.properties
├── gradlew
├── gradlew.bat
├── jitpack.yml
└── settings.gradle.kts
/.gitignore:
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1 | *.iml
2 | .gradle
3 | /local.properties
4 | /.idea/caches
5 | /.idea/libraries
6 | /.idea/modules.xml
7 | /.idea/workspace.xml
8 | /.idea/navEditor.xml
9 | /.idea/assetWizardSettings.xml
10 | .DS_Store
11 | /build
12 | /captures
13 | .externalNativeBuild
14 | .cxx
15 | local.properties
16 |
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/.idea/.gitignore:
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1 | # Default ignored files
2 | /shelf/
3 | /workspace.xml
4 |
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/.idea/.name:
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/.idea/compiler.xml:
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/LICENSE:
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1 | MIT License
2 |
3 | Copyright (c) 2023 Javier Gómez
4 |
5 | Permission is hereby granted, free of charge, to any person obtaining a copy
6 | of this software and associated documentation files (the "Software"), to deal
7 | in the Software without restriction, including without limitation the rights
8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
9 | copies of the Software, and to permit persons to whom the Software is
10 | furnished to do so, subject to the following conditions:
11 |
12 | The above copyright notice and this permission notice shall be included in all
13 | copies or substantial portions of the Software.
14 |
15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 | SOFTWARE.
22 |
--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
1 | # :books: Modifier extension drag-and-drop #
2 |
3 | [](https://jitpack.io/#JGomez-Dev/drag-and-drop-compose-library)
4 |
5 | 
6 |
7 | This project is a library that provides an extension of the Modifier class in Jetpack Compose, allowing you to easily add drag and drop behavior to list items in your applications. With this library, you can enhance the user experience by enabling users to drag items from a list and place them in a new position.
8 |
9 | ### 📁 Example Repo
10 | https://github.com/JGomez-Dev/drag-and-drop-jetpack-compose
11 |
12 | ### :control_knobs: How to Use ###
13 |
14 | To be able to use it, we will need to include the following in the Gradle file of our module where we want to use it:
15 |
16 | ```kotlin
17 | implementation ("com.github.JGomez-Dev:drag-and-drop-compose-library:")
18 | ```
19 |
20 | In the settings.gradle:
21 | ```kotlin
22 | pluginManagement {
23 | repositories {
24 | ...
25 | maven { url = uri("https://jitpack.io") }
26 | }
27 | }
28 |
29 | dependencyResolutionManagement {
30 | repositories {
31 | ...
32 | maven { url = uri("https://jitpack.io") }
33 | }
34 | }
35 | ```
36 |
37 | ## :sparkles: Features
38 | - Drag and drop items within a list.
39 | - Smooth animation and visual effects during drag and drop.
40 | - Reorder items in the list based on user interactions.
41 |
42 | ## :tada: Usage
43 | To use this drag and drop example in your project, follow these steps:
44 |
45 | 1. Add the People data class to your project. The People class represents an item in the list and contains a name property.
46 | 2. Copy the BasicExample and HomeExample composable functions to your project.
47 | 3. Modify the code as needed to fit your project requirements.
48 | 4. Use the ExampleList composable function to display the list of items with drag and drop functionality. Pass the necessary parameters, such as the list of people, slide states, and update functions.
49 | 5. Make sure you have the necessary dependencies and setup for Compose and Material Design in your project.
50 |
51 | ## :computer: Code
52 |
53 | Example
54 | Here's an example usage of the drag and drop functionality:
55 | ```kotlin
56 |
57 | val peopleList = mutableListOf(
58 | People(name = "Martin Jenkins"),
59 | People(name = "Jacquelyn Keith"),
60 | People(name = "Lavern Chen")
61 | )
62 |
63 | @Composable
64 | fun App() {
65 | HomeExample()
66 | }
67 |
68 | @ExperimentalAnimationApi
69 | @Composable
70 | fun HomeExample() {
71 | val slideStates = remember {
72 | mutableStateMapOf()
73 | .apply {
74 | peopleList.map { example ->
75 | example to SlideState.NONE
76 | }.toMap().also {
77 | putAll(it)
78 | }
79 | }
80 | }
81 | Scaffold(
82 | topBar = {
83 | TopAppBar(
84 | title = {
85 | Text(text = "Drag and Drop In Compose")
86 | }
87 | )
88 | }
89 | ) { innerPadding ->
90 | ExampleList(
91 | modifier = Modifier.padding(innerPadding),
92 | peopleList = peopleList,
93 | slideStates = slideStates,
94 | updateSlideState = { people, slideState ->
95 | // Handle slide state updates here
96 | },
97 | updateItemPosition = { currentIndex, destinationIndex ->
98 | // Handle item position updates here
99 | }
100 | )
101 | }
102 | }
103 |
104 | @ExperimentalAnimationApi
105 | @Composable
106 | fun ExampleList(
107 | modifier: Modifier,
108 | peopleList: MutableList,
109 | slideStates: Map,
110 | updateSlideState: (people: People, slideState: SlideState) -> Unit,
111 | updateItemPosition: (currentIndex: Int, destinationIndex: Int) -> Unit
112 | ) {
113 | val lazyListState = rememberLazyListState()
114 | LazyColumn(
115 | state = lazyListState,
116 | modifier = modifier.padding(top = dimensionResource(id = R.dimen.list_top_padding))
117 | ) {
118 | items(peopleList.size) { index ->
119 | val example = peopleList.getOrNull(index)
120 | if (example != null) {
121 | key(example) {
122 | val slideState = slideStates[example] ?: SlideState.NONE
123 | BasicExample(
124 | peoble = example,
125 | peopleList = peopleList,
126 | slideState = slideState,
127 | updateSlideState = updateSlideState,
128 | updateItemPosition = updateItemPosition
129 | )
130 | }
131 | }
132 | }
133 | }
134 | }
135 |
136 | @Composable
137 | fun BasicExample(
138 | peoble: People,
139 | peopleList: MutableList,
140 | slideState: SlideState,
141 | updateSlideState: (shoesArticle: People, slideState: SlideState) -> Unit,
142 | updateItemPosition: (currentIndex: Int, destinationIndex: Int) -> Unit
143 | ) {
144 | val itemHeightDp = dimensionResource(id = R.dimen.image_size)
145 |
146 | val verticalTranslation by animateIntAsState(
147 | targetValue = when (slideState) {
148 | SlideState.UP -> -itemHeight
149 | SlideState.DOWN -> itemHeight
150 | else -> 0
151 | },
152 | label = "",
153 | )
154 | val isDragged = remember { mutableStateOf(false) }
155 | val zIndex = if (isDragged.value) 1.0f else 0.0f
156 | val rotation = if (isDragged.value) -5.0f else 0.0f
157 | val elevation = if (isDragged.value) 8.dp else 0.dp
158 |
159 | val currentIndex = remember { mutableStateOf(0) }
160 | val destinationIndex = remember { mutableStateOf(0) }
161 | val isPlaced = remember { mutableStateOf(false) }
162 |
163 | with(LocalDensity.current) {
164 | itemHeight = itemHeightDp.toPx().toInt()
165 | }
166 |
167 | LaunchedEffect(isPlaced.value) {
168 | if (isPlaced.value) {
169 | launch {
170 | if (currentIndex.value != destinationIndex.value) {
171 | updateItemPosition(currentIndex.value, destinationIndex.value)
172 | }
173 | isPlaced.value = false
174 | }
175 | }
176 | }
177 | Column {
178 | Box(
179 | Modifier
180 | .dragAndDrop(
181 | peoble,
182 | peopleList,
183 | itemHeight,
184 | updateSlideState,
185 | isDraggedAfterLongPress = false,
186 | { isDragged.value = true },
187 | { cIndex, dIndex ->
188 | isDragged.value = false
189 | isPlaced.value = true
190 | currentIndex.value = cIndex
191 | destinationIndex.value = dIndex
192 | }
193 | )
194 | .padding(horizontal = 16.dp)
195 | .offset { IntOffset(0, verticalTranslation) }
196 | .zIndex(zIndex)
197 | .rotate(rotation)
198 |
199 | ) {
200 | Column(
201 | modifier = Modifier
202 | .shadow(elevation, RoundedCornerShape(8.dp))
203 | .clip(RoundedCornerShape(8.dp))
204 | .align(Alignment.CenterStart)
205 | .fillMaxWidth()
206 |
207 | ) {
208 | Row(horizontalArrangement = Arrangement.SpaceBetween) {
209 | Text(text = peoble.name)
210 | Image(
211 | modifier = Modifier
212 | .size(itemHeightDp),
213 | painter = painterResource(id = R.mipmap.ic_climbig_blue),
214 | contentDescription = ""
215 | )
216 | }
217 | }
218 | }
219 | }
220 | }
221 |
222 | ```
223 | ## 🙌 Contributing
224 | Contributions are welcome! If you find any issues or have suggestions for improvements, please create a pull request or open an issue in this repository.
225 |
226 | ## :pencil: License
227 |
228 | MIT License
229 |
230 | Copyright (c) 2023 Javier Gómez
231 |
232 | Permission is hereby granted, free of charge, to any person obtaining a copy
233 | of this software and associated documentation files (the "Software"), to deal
234 | in the Software without restriction, including without limitation the rights
235 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
236 | copies of the Software, and to permit persons to whom the Software is
237 | furnished to do so, subject to the following conditions:
238 |
239 | The above copyright notice and this permission notice shall be included in all
240 | copies or substantial portions of the Software.
241 |
242 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
243 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
244 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
245 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
246 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
247 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
248 | SOFTWARE.
249 |
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/app/.gitignore:
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1 | /build
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/app/build.gradle.kts:
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1 | plugins {
2 | id("com.android.application")
3 | id("org.jetbrains.kotlin.android")
4 | }
5 |
6 | android {
7 | namespace = "com.jgomezdev.draganddroplibreary"
8 | compileSdk = 33
9 |
10 | defaultConfig {
11 | applicationId = "com.jgomezdev.draganddroplibreary"
12 | minSdk = 30
13 | targetSdk = 33
14 | versionCode = 1
15 | versionName = "1.0"
16 |
17 | testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
18 | }
19 |
20 | buildTypes {
21 | release {
22 | isMinifyEnabled = false
23 | proguardFiles(getDefaultProguardFile("proguard-android-optimize.txt"), "proguard-rules.pro")
24 | }
25 | }
26 | compileOptions {
27 | sourceCompatibility = JavaVersion.VERSION_1_8
28 | targetCompatibility = JavaVersion.VERSION_1_8
29 | }
30 | kotlinOptions {
31 | jvmTarget = "1.8"
32 | }
33 | }
34 |
35 | dependencies {
36 | implementation("androidx.core:core-ktx:1.9.0")
37 | implementation("androidx.appcompat:appcompat:1.6.1")
38 | implementation("com.google.android.material:material:1.9.0")
39 | implementation("androidx.constraintlayout:constraintlayout:2.1.4")
40 | testImplementation("junit:junit:4.13.2")
41 | androidTestImplementation("androidx.test.ext:junit:1.1.5")
42 | androidTestImplementation("androidx.test.espresso:espresso-core:3.5.1")
43 | }
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/app/proguard-rules.pro:
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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
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/app/src/androidTest/java/com/jgomezdev/draganddroplibreary/ExampleInstrumentedTest.kt:
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1 | package com.jgomezdev.draganddroplibreary
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("com.jgomezdev.draganddroplibreary", appContext.packageName)
23 | }
24 | }
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1 | package com.jgomezdev.draganddroplibreary
2 |
3 | import androidx.appcompat.app.AppCompatActivity
4 | import android.os.Bundle
5 |
6 | class MainActivity : AppCompatActivity() {
7 | override fun onCreate(savedInstanceState: Bundle?) {
8 | super.onCreate(savedInstanceState)
9 | setContentView(R.layout.activity_main)
10 | }
11 | }
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4 | #FFFFFFFF
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2 | DragAndDropLibrery
3 |
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/app/src/test/java/com/jgomezdev/draganddroplibreary/ExampleUnitTest.kt:
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1 | package com.jgomezdev.draganddroplibreary
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 | }
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/build.gradle.kts:
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1 | // Top-level build file where you can add configuration options common to all sub-projects/modules.
2 | plugins {
3 | id("com.android.application") version "8.0.2" apply false
4 | id("org.jetbrains.kotlin.android") version "1.7.20" apply false
5 | id("com.android.library") version "8.0.2" apply false
6 | }
7 |
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1 | plugins {
2 | id("com.android.library")
3 | id("org.jetbrains.kotlin.android")
4 | id("maven-publish")
5 | }
6 |
7 | android {
8 | namespace = "com.jgomezdev.draganddropcompose"
9 | compileSdk = 33
10 |
11 | defaultConfig {
12 | minSdk = 30
13 |
14 | testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
15 | consumerProguardFiles("consumer-rules.pro")
16 | }
17 |
18 | buildTypes {
19 | release {
20 | isMinifyEnabled = false
21 | proguardFiles(getDefaultProguardFile("proguard-android-optimize.txt"), "proguard-rules.pro")
22 | }
23 | }
24 | compileOptions {
25 | sourceCompatibility = JavaVersion.VERSION_1_8
26 | targetCompatibility = JavaVersion.VERSION_1_8
27 | }
28 | kotlinOptions {
29 | jvmTarget = "1.8"
30 | }
31 | buildFeatures {
32 | compose = true
33 | }
34 |
35 | publishing{
36 | singleVariant("release"){
37 | withJavadocJar()
38 | withSourcesJar()
39 | }
40 | }
41 | }
42 |
43 | dependencies {
44 |
45 | implementation("androidx.core:core-ktx:1.9.0")
46 | implementation("androidx.appcompat:appcompat:1.6.1")
47 | implementation("com.google.android.material:material:1.9.0")
48 | testImplementation("junit:junit:4.13.2")
49 | androidTestImplementation("androidx.test.ext:junit:1.1.5")
50 | androidTestImplementation("androidx.test.espresso:espresso-core:3.5.1")
51 |
52 | //Compose
53 | implementation("androidx.activity:activity-compose:1.7.2")
54 | implementation(platform("androidx.compose:compose-bom:2023.03.00"))
55 | implementation("androidx.compose.ui:ui")
56 | implementation("androidx.compose.ui:ui-graphics")
57 | implementation("androidx.compose.ui:ui-tooling-preview")
58 | implementation("androidx.compose.material3:material3")
59 | }
60 |
61 |
62 | publishing {
63 | publications {
64 | register("release") {
65 | groupId = "com.github.JGomez-Dev"
66 | artifactId = "drag-and-drop-compose-library"
67 | version = "1.0.5"
68 | //System.getenv("GITHUB_TAG")
69 |
70 | afterEvaluate{
71 | from(components["release"])
72 | }
73 | }
74 | }
75 | }
76 |
--------------------------------------------------------------------------------
/drag-and-drop-compose/consumer-rules.pro:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/JGomez-Dev/drag-and-drop-compose-library/0f2fa41ea4cc7ad180349e9e160233d3ac3e188e/drag-and-drop-compose/consumer-rules.pro
--------------------------------------------------------------------------------
/drag-and-drop-compose/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
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/drag-and-drop-compose/src/androidTest/java/com/jgomezdev/draganddropcompose/ExampleInstrumentedTest.kt:
--------------------------------------------------------------------------------
1 | package com.jgomezdev.draganddropcompose
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("com.jgomezdev.draganddropcompose.test", appContext.packageName)
23 | }
24 | }
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/drag-and-drop-compose/src/main/AndroidManifest.xml:
--------------------------------------------------------------------------------
1 |
2 |
3 |
4 |
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/drag-and-drop-compose/src/main/java/com/jgomezdev/draganddropcompose/DragAndDrop.kt:
--------------------------------------------------------------------------------
1 | package com.jgomezdev.draganddropcompose
2 |
3 | import android.util.Log
4 | import androidx.compose.animation.core.Animatable
5 | import androidx.compose.foundation.gestures.awaitFirstDown
6 | import androidx.compose.foundation.gestures.detectDragGesturesAfterLongPress
7 | import androidx.compose.foundation.gestures.drag
8 | import androidx.compose.foundation.layout.offset
9 | import androidx.compose.runtime.remember
10 | import androidx.compose.ui.Modifier
11 | import androidx.compose.ui.composed
12 | import androidx.compose.ui.input.pointer.PointerInputChange
13 | import androidx.compose.ui.input.pointer.consumePositionChange
14 | import androidx.compose.ui.input.pointer.pointerInput
15 | import androidx.compose.ui.input.pointer.positionChange
16 | import androidx.compose.ui.unit.IntOffset
17 | import kotlinx.coroutines.coroutineScope
18 | import kotlinx.coroutines.launch
19 | import java.lang.IndexOutOfBoundsException
20 | import kotlin.math.roundToInt
21 | import kotlin.math.sign
22 |
23 | /**
24 | * Applies drag-and-drop behavior to a composable item within a list of items.
25 | * @param item The item being dragged and dropped.
26 | * @param items The mutable list of items.
27 | * @param itemHeight The height of each item.
28 | * @param updateSlideState A callback function to update the slide state of the item.
29 | * @param isDraggedAfterLongPress Determines if dragging is triggered after a long press.
30 | * @param onStartDrag A callback function invoked when dragging starts.
31 | * @param onStopDrag A callback function invoked when dragging stops, providing the current and destination indices of the item.
32 | *
33 | * @return A modified Modifier with drag-and-drop behavior applied.
34 | * */
35 |
36 | fun Modifier.dragAndDrop(
37 | item: T,
38 | items: MutableList,
39 | itemHeight: Int,
40 | updateSlideState: (item: T, slideState: SlideState) -> Unit,
41 | isDraggedAfterLongPress: Boolean,
42 | onStartDrag: () -> Unit,
43 | onStopDrag: (currentIndex: Int, destinationIndex: Int) -> Unit,
44 | ): Modifier = composed {
45 | val offsetX = remember { Animatable(0f) }
46 | val offsetY = remember { Animatable(0f) }
47 | pointerInput(Unit) {
48 | // Wrap in a coroutine scope to use suspend functions for touch events and animation.
49 | coroutineScope {
50 | val shoesArticleIndex = items.indexOf(item)
51 | val offsetToSlide = itemHeight / 4
52 | var numberOfItems = 0
53 | var previousNumberOfItems: Int
54 | var listOffset = 0
55 |
56 | val onDragStart = {
57 | // Interrupt any ongoing animation of other items.
58 | launch {
59 | offsetX.stop()
60 | offsetY.stop()
61 | }
62 | onStartDrag()
63 | }
64 | val onDrag = {change: PointerInputChange ->
65 | val horizontalDragOffset = offsetX.value + change.positionChange().x
66 | launch {
67 | offsetX.snapTo(horizontalDragOffset)
68 | }
69 | val verticalDragOffset = offsetY.value + change.positionChange().y
70 | launch {
71 | offsetY.snapTo(verticalDragOffset)
72 | val offsetSign = offsetY.value.sign.toInt()
73 | previousNumberOfItems = numberOfItems
74 | numberOfItems = calculateNumberOfSlidItems(
75 | offsetY.value * offsetSign,
76 | itemHeight,
77 | offsetToSlide,
78 | previousNumberOfItems
79 | )
80 |
81 | if (previousNumberOfItems > numberOfItems) {
82 | updateSlideState(
83 | items[shoesArticleIndex + previousNumberOfItems * offsetSign],
84 | SlideState.NONE
85 | )
86 | } else if (numberOfItems != 0) {
87 | try {
88 | updateSlideState(
89 | items[shoesArticleIndex + numberOfItems * offsetSign],
90 | if (offsetSign == 1) SlideState.UP else SlideState.DOWN
91 | )
92 | } catch (e: IndexOutOfBoundsException) {
93 | numberOfItems = previousNumberOfItems
94 | Log.i("DragToReorder", "Item is outside or at the edge")
95 | }
96 | }
97 | listOffset = numberOfItems * offsetSign
98 | }
99 | // Consume the gesture event, not passed to external
100 | change.consumePositionChange()
101 | }
102 | val onDragEnd = {
103 | launch {
104 | offsetX.animateTo(0f)
105 | }
106 | launch {
107 | offsetY.animateTo(itemHeight * numberOfItems * offsetY.value.sign)
108 | onStopDrag(shoesArticleIndex, shoesArticleIndex + listOffset)
109 | }
110 | }
111 | if (isDraggedAfterLongPress)
112 | detectDragGesturesAfterLongPress(
113 | onDragStart = { onDragStart() },
114 | onDrag = { change, _ -> onDrag(change) },
115 | onDragEnd = { onDragEnd() }
116 | ) else
117 | while (true) {
118 | val pointerId = awaitPointerEventScope { awaitFirstDown().id }
119 | awaitPointerEventScope {
120 | drag(pointerId) { change ->
121 | onDragStart()
122 | onDrag(change)
123 | }
124 | }
125 | onDragEnd()
126 | }
127 | }
128 | }
129 | .offset {
130 | // Use the animating offset value here.
131 | IntOffset(offsetX.value.roundToInt(), offsetY.value.roundToInt())
132 | }
133 | }
134 |
135 | private fun calculateNumberOfSlidItems(
136 | offsetY: Float,
137 | itemHeight: Int,
138 | offsetToSlide: Int,
139 | previousNumberOfItems: Int
140 | ): Int {
141 | val numberOfItemsInOffset = (offsetY / itemHeight).toInt()
142 | val numberOfItemsPlusOffset = ((offsetY + offsetToSlide) / itemHeight).toInt()
143 | val numberOfItemsMinusOffset = ((offsetY - offsetToSlide - 1) / itemHeight).toInt()
144 | return when {
145 | offsetY - offsetToSlide - 1 < 0 -> 0
146 | numberOfItemsPlusOffset > numberOfItemsInOffset -> numberOfItemsPlusOffset
147 | numberOfItemsMinusOffset < numberOfItemsInOffset -> numberOfItemsInOffset
148 | else -> previousNumberOfItems
149 | }
150 | }
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/drag-and-drop-compose/src/main/java/com/jgomezdev/draganddropcompose/SlideState.kt:
--------------------------------------------------------------------------------
1 | package com.jgomezdev.draganddropcompose
2 |
3 | enum class SlideState {
4 | NONE,
5 | UP,
6 | DOWN
7 | }
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/drag-and-drop-compose/src/test/java/com/jgomezdev/draganddropcompose/ExampleUnitTest.kt:
--------------------------------------------------------------------------------
1 | package com.jgomezdev.draganddropcompose
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 | }
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/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 | # Kotlin code style for this project: "official" or "obsolete":
19 | kotlin.code.style=official
20 | # Enables namespacing of each library's R class so that its R class includes only the
21 | # resources declared in the library itself and none from the library's dependencies,
22 | # thereby reducing the size of the R class for that library
23 | android.nonTransitiveRClass=true
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/gradle/wrapper/gradle-wrapper.jar:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/JGomez-Dev/drag-and-drop-compose-library/0f2fa41ea4cc7ad180349e9e160233d3ac3e188e/gradle/wrapper/gradle-wrapper.jar
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/gradle/wrapper/gradle-wrapper.properties:
--------------------------------------------------------------------------------
1 | #Tue Jun 27 12:42:45 CEST 2023
2 | distributionBase=GRADLE_USER_HOME
3 | distributionPath=wrapper/dists
4 | distributionUrl=https\://services.gradle.org/distributions/gradle-8.0-bin.zip
5 | zipStoreBase=GRADLE_USER_HOME
6 | zipStorePath=wrapper/dists
7 |
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/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 |
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/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 |
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/jitpack.yml:
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1 | jdk:
2 | -openjdk17
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/settings.gradle.kts:
--------------------------------------------------------------------------------
1 | pluginManagement {
2 | repositories {
3 | google()
4 | mavenCentral()
5 | gradlePluginPortal()
6 | }
7 | }
8 | dependencyResolutionManagement {
9 | repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
10 | repositories {
11 | google()
12 | mavenCentral()
13 | }
14 | }
15 |
16 | rootProject.name = "DragAndDropLibrery"
17 | include(":app")
18 | include(":drag-and-drop-compose")
19 |
--------------------------------------------------------------------------------