Add group spacing

CHANGELOG.md

@@ -1,3 +1,7 @@
+## [6.0.1] - 27.06.2025
+### Features:
+* Add `groupSpacing` to easy create space between each group.
+
 ## [6.0.0] - 27.06.2024
 ### Features: 
 * feat: interdependent items builder [GH-175](https://github.com/Dimibe/grouped_list/pull/175)

README.md

@@ -60,6 +60,7 @@ import 'package:grouped_list/grouped_list.dart';
 | `itemComparator`                                                                       | Can be used to define a custom sorting for the elements inside each group. Otherwise the natural sorting order is used                                                                                                                                                                                                                                                                                                                                      | no | - |
 | `order`                                                                                | Change to `GroupedListOrder.DESC` to reverse the group sorting                                                                                                                                                                                                                                                                                                                                                                                              | no | `GroupedListOrder.ASC` |
 | `footer`                                                                               | Widget at the bottom of the list                                                                                                                                                                                                                                                                                                                                                                                                                            | no | - |
+| `groupSpacing`                                                                               | How much space to place between each group                                                                                                                                                                                                                                                                                                                                                                                                                             | no | - |
 
 **Also the fields from `ListView.builder` can be used.** 
 

example/.metadata

@@ -1,26 +1,23 @@
 # This file tracks properties of this Flutter project.
 # Used by Flutter tool to assess capabilities and perform upgrades etc.
 #
-# This file should be version controlled.
+# This file should be version controlled and should not be manually edited.
 
 version:
-  revision: b06b8b2710955028a6b562f5aa6fe62941d6febf
-  channel: stable
+  revision: "ea121f8859e4b13e47a8f845e4586164519588bc"
+  channel: "stable"
 
 project_type: app
 
 # Tracks metadata for the flutter migrate command
 migration:
   platforms:
     - platform: root
-      create_revision: b06b8b2710955028a6b562f5aa6fe62941d6febf
-      base_revision: b06b8b2710955028a6b562f5aa6fe62941d6febf
+      create_revision: ea121f8859e4b13e47a8f845e4586164519588bc
+      base_revision: ea121f8859e4b13e47a8f845e4586164519588bc
     - platform: android
-      create_revision: b06b8b2710955028a6b562f5aa6fe62941d6febf
-      base_revision: b06b8b2710955028a6b562f5aa6fe62941d6febf
-    - platform: ios
-      create_revision: b06b8b2710955028a6b562f5aa6fe62941d6febf
-      base_revision: b06b8b2710955028a6b562f5aa6fe62941d6febf
+      create_revision: ea121f8859e4b13e47a8f845e4586164519588bc
+      base_revision: ea121f8859e4b13e47a8f845e4586164519588bc
 
   # User provided section
 

example/android/.gitignore

@@ -5,9 +5,10 @@ gradle-wrapper.jar
 /gradlew.bat
 /local.properties
 GeneratedPluginRegistrant.java
+.cxx/
 
 # Remember to never publicly share your keystore.
-# See https://flutter.dev/docs/deployment/android#reference-the-keystore-from-the-app
+# See https://flutter.dev/to/reference-keystore
 key.properties
 **/*.keystore
 **/*.jks

example/android/app/build.gradle.kts

@@ -0,0 +1,44 @@
+plugins {
+    id("com.android.application")
+    id("kotlin-android")
+    // The Flutter Gradle Plugin must be applied after the Android and Kotlin Gradle plugins.
+    id("dev.flutter.flutter-gradle-plugin")
+}
+
+android {
+    namespace = "com.example.example"
+    compileSdk = flutter.compileSdkVersion
+    ndkVersion = flutter.ndkVersion
+
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_11
+        targetCompatibility = JavaVersion.VERSION_11
+    }
+
+    kotlinOptions {
+        jvmTarget = JavaVersion.VERSION_11.toString()
+    }
+
+    defaultConfig {
+        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
+        applicationId = "com.example.example"
+        // You can update the following values to match your application needs.
+        // For more information, see: https://flutter.dev/to/review-gradle-config.
+        minSdk = flutter.minSdkVersion
+        targetSdk = flutter.targetSdkVersion
+        versionCode = flutter.versionCode
+        versionName = flutter.versionName
+    }
+
+    buildTypes {
+        release {
+            // TODO: Add your own signing config for the release build.
+            // Signing with the debug keys for now, so `flutter run --release` works.
+            signingConfig = signingConfigs.getByName("debug")
+        }
+    }
+}
+
+flutter {
+    source = "../.."
+}

example/android/app/src/debug/AndroidManifest.xml

@@ -1,5 +1,4 @@
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="com.example.example">
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
     <!-- The INTERNET permission is required for development. Specifically,
          the Flutter tool needs it to communicate with the running application
          to allow setting breakpoints, to provide hot reload, etc.

example/android/app/src/main/AndroidManifest.xml

@@ -1,13 +1,13 @@
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="com.example.example">
-   <application
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+    <application
         android:label="example"
         android:name="${applicationName}"
         android:icon="@mipmap/ic_launcher">
         <activity
             android:name=".MainActivity"
             android:exported="true"
             android:launchMode="singleTop"
+            android:taskAffinity=""
             android:theme="@style/LaunchTheme"
             android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
             android:hardwareAccelerated="true"
@@ -31,4 +31,15 @@
             android:name="flutterEmbedding"
             android:value="2" />
     </application>
+    <!-- Required to query activities that can process text, see:
+         https://developer.android.com/training/package-visibility and
+         https://developer.android.com/reference/android/content/Intent#ACTION_PROCESS_TEXT.
+
+         In particular, this is used by the Flutter engine in io.flutter.plugin.text.ProcessTextPlugin. -->
+    <queries>
+        <intent>
+            <action android:name="android.intent.action.PROCESS_TEXT"/>
+            <data android:mimeType="text/plain"/>
+        </intent>
+    </queries>
 </manifest>

example/android/app/src/main/kotlin/com/example/example/MainActivity.kt

@@ -2,5 +2,4 @@ package com.example.example
 
 import io.flutter.embedding.android.FlutterActivity
 
-class MainActivity: FlutterActivity() {
-}
+class MainActivity : FlutterActivity()

example/android/app/src/profile/AndroidManifest.xml

@@ -1,5 +1,4 @@
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="com.example.example">
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
     <!-- The INTERNET permission is required for development. Specifically,
          the Flutter tool needs it to communicate with the running application
          to allow setting breakpoints, to provide hot reload, etc.

example/android/build.gradle.kts

@@ -0,0 +1,21 @@
+allprojects {
+    repositories {
+        google()
+        mavenCentral()
+    }
+}
+
+val newBuildDir: Directory = rootProject.layout.buildDirectory.dir("../../build").get()
+rootProject.layout.buildDirectory.value(newBuildDir)
+
+subprojects {
+    val newSubprojectBuildDir: Directory = newBuildDir.dir(project.name)
+    project.layout.buildDirectory.value(newSubprojectBuildDir)
+}
+subprojects {
+    project.evaluationDependsOn(":app")
+}
+
+tasks.register<Delete>("clean") {
+    delete(rootProject.layout.buildDirectory)
+}

example/android/gradle.properties

@@ -1,3 +1,3 @@
-org.gradle.jvmargs=-Xmx1536M
+org.gradle.jvmargs=-Xmx8G -XX:MaxMetaspaceSize=4G -XX:ReservedCodeCacheSize=512m -XX:+HeapDumpOnOutOfMemoryError
 android.useAndroidX=true
 android.enableJetifier=true

example/android/gradle/wrapper/gradle-wrapper.properties

@@ -2,4 +2,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.5-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.10.2-all.zip

example/android/settings.gradle.kts

@@ -0,0 +1,25 @@
+pluginManagement {
+    val flutterSdkPath = run {
+        val properties = java.util.Properties()
+        file("local.properties").inputStream().use { properties.load(it) }
+        val flutterSdkPath = properties.getProperty("flutter.sdk")
+        require(flutterSdkPath != null) { "flutter.sdk not set in local.properties" }
+        flutterSdkPath
+    }
+
+    includeBuild("$flutterSdkPath/packages/flutter_tools/gradle")
+
+    repositories {
+        google()
+        mavenCentral()
+        gradlePluginPortal()
+    }
+}
+
+plugins {
+    id("dev.flutter.flutter-plugin-loader") version "1.0.0"
+    id("com.android.application") version "8.7.0" apply false
+    id("org.jetbrains.kotlin.android") version "1.8.22" apply false
+}
+
+include(":app")

lib/grouped_list.dart

@@ -213,6 +213,9 @@ class GroupedListView<T, E> extends StatefulWidget {
   /// Widget to be placed at the bottom of the list.
   final Widget? footer;
 
+  /// How much space to place between each group.
+  final double? groupSpacing;
+
   /// Creates a [GroupedListView].
   /// This constructor requires that [elements] and [groupBy] are provieded.
   /// [elements] defines a list of elements which are displayed in the list and
@@ -259,6 +262,7 @@ class GroupedListView<T, E> extends StatefulWidget {
     this.semanticChildCount,
     this.itemExtent,
     this.footer,
+    this.groupSpacing,
   })  : assert(itemBuilder != null ||
             indexedItemBuilder != null ||
             interdependentItemBuilder != null ||
@@ -347,6 +351,12 @@ class _GroupedListViewState<T, E> extends State<GroupedListView<T, E>> {
           : null;
       if (isSeparator(index)) {
         if (prev != curr) {
+          if (widget.groupSpacing != null) {
+            return Padding(
+              padding: EdgeInsets.only(top: widget.groupSpacing!),
+              child: _buildGroupSeparator(_sortedElements[actualIndex]),
+            );
+          }
           return _buildGroupSeparator(_sortedElements[actualIndex]);
         }
         return widget.separator;