feat: setup of navigation and main screens files

app/build.gradle

@@ -66,6 +66,8 @@ dependencies {
     implementation "androidx.compose.material3:material3:1.2.1"
     implementation 'androidx.test:core-ktx:1.6.1'
     implementation 'com.google.ar:core:1.44.0'
+    implementation 'androidx.navigation:navigation-runtime-ktx:2.7.7'
+    implementation 'androidx.navigation:navigation-compose:2.7.7'
     testImplementation 'junit:junit:4.13.2'
     androidTestImplementation 'androidx.test.ext:junit:1.2.1'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.6.1'

app/src/main/java/be/re/writand/MainActivity.kt

@@ -9,7 +9,9 @@ import androidx.compose.material3.Surface
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+import androidx.navigation.compose.rememberNavController
+import be.re.writand.navigation.WNavGraph
 import be.re.writand.ui.theme.WritandTheme
 
 class MainActivity : ComponentActivity() {
@@ -22,22 +24,12 @@ class MainActivity : ComponentActivity() {
                     modifier = Modifier.fillMaxSize(),
                     color = MaterialTheme.colorScheme.primary
                 ) {
-                    Greeting("Android")
+                    WNavGraph(
+                        navHostController = rememberNavController(),
+                        modifier = Modifier.padding(5.dp)
+                    )
                 }
             }
         }
     }
 }
-
-@Composable
-fun Greeting(name: String) {
-    Text(text = "Hello $name!")
-}
-
-@Preview(showBackground = true)
-@Composable
-fun DefaultPreview() {
-    WritandTheme {
-        Greeting("Android")
-    }
-}

app/src/main/java/be/re/writand/navigation/WAppDestinations.kt

@@ -0,0 +1,21 @@
+package be.re.writand.navigation
+
+/**
+ * All the destinations of the different screens the navigator can go to.
+ * They are categorized, so it's easier to find/add destinations.
+ */
+object WAppDestinations {
+    // Start of application
+    const val SPLASH = "splash"
+
+    // Welcome screens for first time user
+    const val WELCOME_START = "welcome_start"
+    const val WELCOME_TOS = "welcome_tos"
+    const val WELCOME_SETTINGS = "welcome_settings"
+
+    // Project picker
+    const val PROJECT_PICKER = "project_picker"
+
+    // Editor view
+    const val MAIN_EDITOR = "main_editor"
+}

app/src/main/java/be/re/writand/navigation/WNavGraph.kt

@@ -0,0 +1,68 @@
+package be.re.writand.navigation
+
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.navigation.compose.NavHost
+import androidx.navigation.NavHostController
+import androidx.navigation.compose.composable
+import be.re.writand.screens.editor.EditorScreen
+import be.re.writand.screens.projectpicker.ProjectPickerScreen
+import be.re.writand.screens.splash.SplashScreen
+import be.re.writand.screens.welcome.WelcomeSettingsScreen
+import be.re.writand.screens.welcome.WelcomeStartScreen
+import be.re.writand.screens.welcome.WelcomeTOSScreen
+
+/**
+ * The navigation controller containing all the different screens a user can go to.
+ * @param[navHostController] the controller to go from one screen to another and back.
+ * @param[modifier] the general modifier that should be applied to all screens.
+ */
+@Composable
+fun WNavGraph(navHostController: NavHostController, modifier: Modifier) {
+
+    val onBackArrow: () -> Unit = { navHostController.navigateUp() }
+
+    NavHost(
+        navController = navHostController,
+        startDestination = WAppDestinations.SPLASH,
+        modifier = modifier
+    ) {
+
+
+        // Start of application
+
+        composable(WAppDestinations.SPLASH) {
+            SplashScreen(navHostController = navHostController)
+        }
+
+
+        // Welcome screens for first time user
+
+        composable(WAppDestinations.WELCOME_START) {
+            WelcomeStartScreen(navHostController = navHostController)
+        }
+
+        composable(WAppDestinations.WELCOME_TOS) {
+            WelcomeTOSScreen(navHostController = navHostController)
+        }
+
+        composable(WAppDestinations.WELCOME_SETTINGS) {
+            WelcomeSettingsScreen(navHostController = navHostController)
+        }
+
+
+        // Project picker
+
+        composable(WAppDestinations.PROJECT_PICKER) {
+            ProjectPickerScreen(navHostController = navHostController)
+        }
+
+
+        // Editor view
+
+        composable(WAppDestinations.MAIN_EDITOR) {
+            EditorScreen(navHostController = navHostController)
+        }
+
+    }
+}

app/src/main/java/be/re/writand/screens/editor/EditorScreen.kt

@@ -0,0 +1,11 @@
+package be.re.writand.screens.editor
+
+import androidx.compose.runtime.Composable
+import androidx.navigation.NavHostController
+
+@Composable
+fun EditorScreen(
+    navHostController: NavHostController
+) {
+
+}

app/src/main/java/be/re/writand/screens/projectpicker/ProjectPickerScreen.kt

@@ -0,0 +1,23 @@
+package be.re.writand.screens.projectpicker
+
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.size
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
+import androidx.navigation.NavHostController
+import be.re.writand.navigation.WAppDestinations
+import be.re.writand.screens.components.WButton
+
+@Composable
+fun ProjectPickerScreen(
+    navHostController: NavHostController
+) {
+
+    Box(modifier = Modifier.size(20.dp, 20.dp)) {
+        WButton(
+            text = "Create new",
+            onClick = { navHostController.navigate(WAppDestinations.MAIN_EDITOR) }
+        )
+    }
+}

app/src/main/java/be/re/writand/screens/splash/SplashScreen.kt

@@ -0,0 +1,25 @@
+package be.re.writand.screens.splash
+
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.size
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
+import androidx.navigation.NavHostController
+import be.re.writand.navigation.WAppDestinations
+import be.re.writand.screens.components.WButton
+
+@Composable
+fun SplashScreen(
+    navHostController: NavHostController
+) {
+
+    Box(modifier = Modifier.size(20.dp, 20.dp)) {
+        WButton(
+            text = "Some fancy screen where you click...",
+            // TODO: find out which screen is next
+            onClick = { navHostController.navigate(WAppDestinations.WELCOME_START) }
+        )
+    }
+
+}

app/src/main/java/be/re/writand/screens/splash/SplashViewModel.kt

@@ -0,0 +1,4 @@
+package be.re.writand.screens.splash
+
+class SplashViewModel {
+}

app/src/main/java/be/re/writand/screens/welcome/WelcomeSettingsScreen.kt

@@ -0,0 +1,24 @@
+package be.re.writand.screens.welcome
+
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.size
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
+import androidx.navigation.NavHostController
+import be.re.writand.navigation.WAppDestinations
+import be.re.writand.screens.components.WButton
+
+@Composable
+fun WelcomeSettingsScreen(
+    navHostController: NavHostController
+) {
+
+    Box(modifier = Modifier.size(20.dp, 20.dp)) {
+        WButton(
+            text = "Finish",
+            onClick = { navHostController.navigate(WAppDestinations.PROJECT_PICKER) }
+        )
+    }
+
+}

app/src/main/java/be/re/writand/screens/welcome/WelcomeStartScreen.kt

@@ -0,0 +1,24 @@
+package be.re.writand.screens.welcome
+
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.size
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
+import androidx.navigation.NavHostController
+import be.re.writand.navigation.WAppDestinations
+import be.re.writand.screens.components.WButton
+
+@Composable
+fun WelcomeStartScreen(
+    navHostController: NavHostController
+) {
+
+    Box(modifier = Modifier.size(20.dp, 20.dp)) {
+        WButton(
+            text = "Next",
+            onClick = { navHostController.navigate(WAppDestinations.WELCOME_TOS) }
+        )
+    }
+
+}

app/src/main/java/be/re/writand/screens/welcome/WelcomeTOSScreen.kt

@@ -0,0 +1,24 @@
+package be.re.writand.screens.welcome
+
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.size
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
+import androidx.navigation.NavHostController
+import be.re.writand.navigation.WAppDestinations
+import be.re.writand.screens.components.WButton
+
+@Composable
+fun WelcomeTOSScreen(
+    navHostController: NavHostController
+) {
+
+    Box(modifier = Modifier.size(20.dp, 20.dp)) {
+        WButton(
+            text = "Next",
+            onClick = { navHostController.navigate(WAppDestinations.WELCOME_SETTINGS) }
+        )
+    }
+
+}