Basic navigation drawer examples

compose/snippets/src/main/java/com/example/compose/snippets/SnippetsActivity.kt

@@ -42,6 +42,7 @@ import com.example.compose.snippets.components.DialogExamples
 import com.example.compose.snippets.components.DividerExamples
 import com.example.compose.snippets.components.FloatingActionButtonExamples
 import com.example.compose.snippets.components.MenusExamples
+import com.example.compose.snippets.components.NavigationDrawerExamples
 import com.example.compose.snippets.components.PartialBottomSheet
 import com.example.compose.snippets.components.ProgressIndicatorExamples
 import com.example.compose.snippets.components.ScaffoldExample
@@ -113,6 +114,7 @@ class SnippetsActivity : ComponentActivity() {
                                     TopComponentsDestination.DatePickerExamples -> DatePickerExamples()
                                     TopComponentsDestination.CarouselExamples -> CarouselExamples()
                                     TopComponentsDestination.MenusExample -> MenusExamples()
+                                    TopComponentsDestination.NavigationDrawerExamples -> NavigationDrawerExamples()
                                 }
                             }
                         }

compose/snippets/src/main/java/com/example/compose/snippets/components/NavigationDrawer.kt

@@ -0,0 +1,184 @@
+package com.example.compose.snippets.components
+
+import androidx.compose.animation.AnimatedVisibility
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.ColumnScope
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.KeyboardArrowDown
+import androidx.compose.material.icons.filled.KeyboardArrowUp
+import androidx.compose.material3.Button
+import androidx.compose.material3.HorizontalDivider
+import androidx.compose.material3.Icon
+import androidx.compose.material3.ModalDrawerSheet
+import androidx.compose.material3.ModalNavigationDrawer
+import androidx.compose.material3.NavigationDrawerItem
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.saveable.rememberSaveable
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+
+enum class ExampleStrings(val description: String){
+    SIMPLE("simple navigation drawer example"),
+    NESTED("navigation drawer with nested items")
+}
+
+@Composable
+fun NavigationDrawerExamples(){
+    var currentExample by remember { mutableStateOf<ExampleStrings?>(null) }
+
+    if (currentExample == null){
+        Column(){
+            Text(
+                text = "Select which example you'd like to see.",
+                textAlign = TextAlign.Center,
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .padding(16.dp)
+            )
+
+            Button(onClick = {currentExample = ExampleStrings.SIMPLE}){
+                Text("Simple navigation drawer.")
+            }
+            Button(onClick = {currentExample = ExampleStrings.NESTED}){
+                Text("Navigation drawer with nested items.")
+            }
+        }
+
+        return
+    }
+
+    Column(modifier = Modifier.fillMaxSize()){
+        Text(
+            text = "Swipe from left to open the ${currentExample!!.description}.",
+            textAlign = TextAlign.Center,
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(16.dp)
+        )
+    }
+
+    when (currentExample){
+        null,
+        ExampleStrings.SIMPLE -> SimpleNavigationDrawerExample()
+        ExampleStrings.NESTED -> NestedNavigationDrawerExample()
+    }
+}
+
+@Preview
+@Composable
+private fun NavigationDrawerExamplesPreview(){
+    NavigationDrawerExamples()
+}
+
+// [START android_compose_components_navigationdrawergroupitem]
+@Composable
+fun NavigationDrawerGroupItem(
+    label: @Composable () -> Unit,
+    content: @Composable ColumnScope.() -> Unit,
+) {
+    var isExpanded by rememberSaveable { mutableStateOf(false) }
+
+    NavigationDrawerItem(
+        label = label,
+        selected = isExpanded,
+        onClick = { isExpanded = !isExpanded },
+        icon = {
+            Icon(
+                imageVector = if (isExpanded) Icons.Default.KeyboardArrowUp else Icons.Default.KeyboardArrowDown,
+                contentDescription = if (isExpanded) "Collapse" else "Expand"
+            )
+        }
+    )
+    AnimatedVisibility(visible = isExpanded) {
+        Column(modifier = Modifier.padding(start = 16.dp)) {
+            content()
+        }
+    }
+}
+// [END android_compose_components_navigationdrawergroupitem]
+
+// [START android_compose_components_simplenavigationdrawerexample]
+@Composable
+fun SimpleNavigationDrawerExample() {
+    ModalNavigationDrawer(
+        drawerContent = {
+            ModalDrawerSheet {
+                NavigationDrawerItem(
+                    label = { Text(text = "Item 1") },
+                    selected = false,
+                    onClick = { /* Do something... */ }
+                )
+                NavigationDrawerItem(
+                    label = { Text(text = "Item 2") },
+                    selected = false,
+                    onClick = { /* Do something... */ }
+                )
+            }
+        }
+    ) {
+        // Screen content
+    }
+}
+// [END android_compose_components_simplenavigationdrawerexample]
+
+// [START android_compose_components_nestednavigationdrawerexample]
+@Composable
+fun NestedNavigationDrawerExample() {
+    ModalNavigationDrawer(
+        drawerContent = {
+            ModalDrawerSheet {
+                Text("Drawer Title", modifier = Modifier.padding(16.dp))
+                HorizontalDivider()
+                NavigationDrawerItem(
+                    label = { Text(text = "Drawer Item") },
+                    selected = false,
+                    onClick = { /* Do something... */ }
+                )
+                NavigationDrawerGroupItem(
+                    label = { Text("Drawer Group Item") },
+                    content = {
+                        NavigationDrawerItem(
+                            label = { Text(text = "Drawer Item") },
+                            selected = false,
+                            onClick = { /* Do something... */ }
+                        )
+                        NavigationDrawerGroupItem(
+                            label = { Text("Nested Group Item") },
+                            content = {
+                                NavigationDrawerItem(
+                                    label = { Text(text = "Inner Drawer Item") },
+                                    selected = false,
+                                    onClick = { /* Do something... */ }
+                                )
+                                NavigationDrawerItem(
+                                    label = { Text(text = "Inner Drawer Item") },
+                                    selected = false,
+                                    onClick = { /* Do something... */ }
+                                )
+                            }
+                        )
+                        NavigationDrawerItem(
+                            label = { Text(text = "Drawer Item") },
+                            selected = false,
+                            onClick = { /* Do something... */ }
+                        )
+                    }
+                )
+            }
+        }
+    ) {
+        // Screen content
+    }
+}
+// [END android_compose_components_nestednavigationdrawerexample]
+

compose/snippets/src/main/java/com/example/compose/snippets/navigation/Destination.kt

@@ -45,5 +45,6 @@ enum class TopComponentsDestination(val route: String, val title: String) {
     TimePickerExamples("timePickerExamples", "Time Pickers"),
     DatePickerExamples("datePickerExamples", "Date Pickers"),
     CarouselExamples("carouselExamples", "Carousel"),
-    MenusExample("menusExamples", "Menus")
+    MenusExample("menusExamples", "Menus"),
+    NavigationDrawerExamples("navigationDrawerExamples", "Navigation drawer")
 }