Adding basic TouchpadTutorialActivity with starting ViewModels

Test: activity launches when triggered from intent: adb shell am start -a com.android.systemui.action.TOUCHPAD_TUTORIAL -c android.intent.category.DEFAULT
Bug: 309928033
Flag: com.android.systemui.new_touchpad_gestures_tutorial
Change-Id: I45aeb771ea8318c95085cd3dd323df98c8686e13

packages/SystemUI/Android.bp

@@ -483,6 +483,7 @@ android_library {
         "androidx.compose.material_material-icons-extended",
         "androidx.activity_activity-compose",
         "androidx.compose.animation_animation-graphics",
+        "androidx.lifecycle_lifecycle-viewmodel-compose",
         "device_policy_aconfig_flags_lib",
     ],
     libs: [
@@ -644,6 +645,7 @@ android_library {
         "androidx.compose.material_material-icons-extended",
         "androidx.activity_activity-compose",
         "androidx.compose.animation_animation-graphics",
+        "androidx.lifecycle_lifecycle-viewmodel-compose",
         "TraceurCommon",
     ],
 }

packages/SystemUI/AndroidManifest.xml

@@ -475,6 +475,15 @@
             android:exported="false"
             android:noHistory="true" />
 
+        <activity android:name=".touchpad.tutorial.ui.view.TouchpadTutorialActivity"
+            android:exported="true"
+            android:theme="@style/Theme.AppCompat.NoActionBar">
+            <intent-filter>
+                <action android:name="com.android.systemui.action.TOUCHPAD_TUTORIAL"/>
+                <category android:name="android.intent.category.DEFAULT"/>
+            </intent-filter>
+        </activity>
+
         <service android:name=".screenshot.appclips.AppClipsScreenshotHelperService"
             android:exported="false"
             android:singleUser="true"

packages/SystemUI/src/com/android/systemui/dagger/DefaultActivityBinder.java

@@ -29,6 +29,7 @@ import com.android.systemui.screenshot.scroll.LongScreenshotActivity;
 import com.android.systemui.sensorprivacy.SensorUseStartedActivity;
 import com.android.systemui.settings.brightness.BrightnessDialog;
 import com.android.systemui.telephony.ui.activity.SwitchToManagedProfileForCallActivity;
+import com.android.systemui.touchpad.tutorial.ui.view.TouchpadTutorialActivity;
 import com.android.systemui.tuner.TunerActivity;
 import com.android.systemui.usb.UsbAccessoryUriActivity;
 import com.android.systemui.usb.UsbConfirmActivity;
@@ -156,4 +157,10 @@ public abstract class DefaultActivityBinder {
     @ClassKey(SwitchToManagedProfileForCallActivity.class)
     public abstract Activity bindSwitchToManagedProfileForCallActivity(
             SwitchToManagedProfileForCallActivity activity);
+
+    /** Inject into TouchpadTutorialActivity. */
+    @Binds
+    @IntoMap
+    @ClassKey(TouchpadTutorialActivity.class)
+    public abstract Activity bindTouchpadTutorialActivity(TouchpadTutorialActivity activity);
 }

packages/SystemUI/src/com/android/systemui/touchpad/tutorial/ui/GestureViewModelFactory.kt

+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.systemui.touchpad.tutorial.ui
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
+
+sealed class GestureTutorialViewModel : ViewModel()
+
+class BackGestureTutorialViewModel : GestureTutorialViewModel()
+
+class HomeGestureTutorialViewModel : GestureTutorialViewModel()
+
+class GestureViewModelFactory : ViewModelProvider.Factory {
+
+    @Suppress("UNCHECKED_CAST")
+    override fun <T : ViewModel> create(modelClass: Class<T>): T {
+        return when (modelClass) {
+            BackGestureTutorialViewModel::class.java -> BackGestureTutorialViewModel()
+            HomeGestureTutorialViewModel::class.java -> HomeGestureTutorialViewModel()
+            else -> error("Unknown ViewModel class: ${modelClass.name}")
+        }
+            as T
+    }
+}

packages/SystemUI/src/com/android/systemui/touchpad/tutorial/ui/TouchpadTutorialViewModel.kt

+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.systemui.touchpad.tutorial.ui
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import javax.inject.Inject
+
+class TouchpadTutorialViewModel : ViewModel() {
+
+    private val _screen = MutableStateFlow(Screen.TUTORIAL_SELECTION)
+    val screen: StateFlow<Screen> = _screen
+
+    class Factory @Inject constructor() : ViewModelProvider.Factory {
+
+        @Suppress("UNCHECKED_CAST")
+        override fun <T : ViewModel> create(modelClass: Class<T>): T {
+            return TouchpadTutorialViewModel() as T
+        }
+    }
+}
+
+enum class Screen {
+    TUTORIAL_SELECTION,
+    BACK_GESTURE,
+    HOME_GESTURE,
+}

packages/SystemUI/src/com/android/systemui/touchpad/tutorial/ui/TutorialSelectionViewModel.kt

+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.systemui.touchpad.tutorial.ui
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
+
+class TutorialSelectionViewModel : ViewModel()
+
+class TutorialSelectionViewModelFactory : ViewModelProvider.Factory {
+
+    @Suppress("UNCHECKED_CAST")
+    override fun <T : ViewModel> create(modelClass: Class<T>): T {
+        return TutorialSelectionViewModel() as T
+    }
+}

packages/SystemUI/src/com/android/systemui/touchpad/tutorial/ui/view/TouchpadTutorialActivity.kt

+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.systemui.touchpad.tutorial.ui.view
+
+import android.os.Bundle
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.lifecycle.Lifecycle.State.STARTED
+import androidx.lifecycle.ViewModelProvider
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import androidx.lifecycle.viewmodel.compose.viewModel
+import com.android.compose.theme.PlatformTheme
+import com.android.systemui.touchpad.tutorial.ui.BackGestureTutorialViewModel
+import com.android.systemui.touchpad.tutorial.ui.GestureViewModelFactory
+import com.android.systemui.touchpad.tutorial.ui.HomeGestureTutorialViewModel
+import com.android.systemui.touchpad.tutorial.ui.Screen.BACK_GESTURE
+import com.android.systemui.touchpad.tutorial.ui.Screen.HOME_GESTURE
+import com.android.systemui.touchpad.tutorial.ui.Screen.TUTORIAL_SELECTION
+import com.android.systemui.touchpad.tutorial.ui.TouchpadTutorialViewModel
+import com.android.systemui.touchpad.tutorial.ui.TutorialSelectionViewModel
+import com.android.systemui.touchpad.tutorial.ui.TutorialSelectionViewModelFactory
+import javax.inject.Inject
+
+class TouchpadTutorialActivity
+@Inject
+constructor(
+    private val viewModelFactory: TouchpadTutorialViewModel.Factory,
+) : ComponentActivity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContent { PlatformTheme { TouchpadTutorialScreen(viewModelFactory) } }
+    }
+}
+
+@Composable
+fun TouchpadTutorialScreen(viewModelFactory: ViewModelProvider.Factory) {
+    val vm = viewModel<TouchpadTutorialViewModel>(factory = viewModelFactory)
+    val activeScreen by vm.screen.collectAsStateWithLifecycle(STARTED)
+    when (activeScreen) {
+        TUTORIAL_SELECTION -> TutorialSelectionScreen()
+        BACK_GESTURE -> BackGestureTutorialScreen()
+        HOME_GESTURE -> HomeGestureTutorialScreen()
+    }
+}
+
+@Composable
+fun TutorialSelectionScreen() {
+    val vm = viewModel<TutorialSelectionViewModel>(factory = TutorialSelectionViewModelFactory())
+}
+
+@Composable
+fun BackGestureTutorialScreen() {
+    val vm = viewModel<BackGestureTutorialViewModel>(factory = GestureViewModelFactory())
+}
+
+@Composable
+fun HomeGestureTutorialScreen() {
+    val vm = viewModel<HomeGestureTutorialViewModel>(factory = GestureViewModelFactory())
+}