Implementing TutorialSelectionScreen

TutorialSelectionScreen is first screen appearing when coming from settings and lets user choose which tutorial to do.
This is just a rough implementation, there's not visd yet but it's a good starting point.

Also making the whole activity properly full screen

Flag: com.android.systemui.new_touchpad_gestures_tutorial
Fixes: 346580488
Test: manually, launch activity with intent: adb shell am start -a com.android.systemui.action.TOUCHPAD_TUTORIAL -c android.intent.category.DEFAULT
Change-Id: Iaa3d3e2925eb6f60456718e840621c988c5f94fc
diff --git a/packages/SystemUI/res/values/strings.xml b/packages/SystemUI/res/values/strings.xml
index cac2df5b..bc90177 100644
--- a/packages/SystemUI/res/values/strings.xml
+++ b/packages/SystemUI/res/values/strings.xml
@@ -3526,6 +3526,15 @@
          [CHAR LIMIT=NONE] -->
     <string name="shortcut_helper_content_description_expand_icon">Expand icon</string>
 
+    <!-- Label for button opening tutorial for back gesture on touchpad [CHAR LIMIT=NONE] -->
+    <string name="touchpad_tutorial_back_gesture_button">Back gesture</string>
+    <!-- Label for button opening tutorial for back gesture on touchpad [CHAR LIMIT=NONE] -->
+    <string name="touchpad_tutorial_home_gesture_button">Home gesture</string>
+    <!-- Label for button opening tutorial on using Action key from keyboard [CHAR LIMIT=NONE] -->
+    <string name="touchpad_tutorial_action_key_button">Action key</string>
+    <!-- Label for button finishing touchpad tutorial [CHAR LIMIT=NONE] -->
+    <string name="touchpad_tutorial_done_button">Done</string>
+
     <!-- Content description for keyboard backlight brightness dialog [CHAR LIMIT=NONE] -->
     <string name="keyboard_backlight_dialog_title">Keyboard backlight</string>
     <!-- Content description for keyboard backlight brightness value [CHAR LIMIT=NONE] -->
diff --git a/packages/SystemUI/src/com/android/systemui/touchpad/tutorial/ui/TouchpadTutorialViewModel.kt b/packages/SystemUI/src/com/android/systemui/touchpad/tutorial/ui/TouchpadTutorialViewModel.kt
index 7669524..11740a8 100644
--- a/packages/SystemUI/src/com/android/systemui/touchpad/tutorial/ui/TouchpadTutorialViewModel.kt
+++ b/packages/SystemUI/src/com/android/systemui/touchpad/tutorial/ui/TouchpadTutorialViewModel.kt
@@ -27,6 +27,10 @@
     private val _screen = MutableStateFlow(Screen.TUTORIAL_SELECTION)
     val screen: StateFlow<Screen> = _screen
 
+    fun goTo(screen: Screen) {
+        _screen.value = screen
+    }
+
     class Factory @Inject constructor() : ViewModelProvider.Factory {
 
         @Suppress("UNCHECKED_CAST")
diff --git a/packages/SystemUI/src/com/android/systemui/touchpad/tutorial/ui/TutorialSelectionViewModel.kt b/packages/SystemUI/src/com/android/systemui/touchpad/tutorial/ui/TutorialSelectionViewModel.kt
deleted file mode 100644
index 1a8272d8..0000000
--- a/packages/SystemUI/src/com/android/systemui/touchpad/tutorial/ui/TutorialSelectionViewModel.kt
+++ /dev/null
@@ -1,30 +0,0 @@
-/*
- * 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
-    }
-}
diff --git a/packages/SystemUI/src/com/android/systemui/touchpad/tutorial/ui/view/TouchpadTutorialActivity.kt b/packages/SystemUI/src/com/android/systemui/touchpad/tutorial/ui/view/TouchpadTutorialActivity.kt
index 09dd909..b7629c7 100644
--- a/packages/SystemUI/src/com/android/systemui/touchpad/tutorial/ui/view/TouchpadTutorialActivity.kt
+++ b/packages/SystemUI/src/com/android/systemui/touchpad/tutorial/ui/view/TouchpadTutorialActivity.kt
@@ -19,6 +19,7 @@
 import android.os.Bundle
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
+import androidx.activity.enableEdgeToEdge
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.getValue
 import androidx.lifecycle.Lifecycle.State.STARTED
@@ -33,8 +34,6 @@
 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
@@ -45,27 +44,31 @@
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-        setContent { PlatformTheme { TouchpadTutorialScreen(viewModelFactory) } }
+        enableEdgeToEdge()
+        setContent {
+            PlatformTheme { TouchpadTutorialScreen(viewModelFactory, closeTutorial = { finish() }) }
+        }
     }
 }
 
 @Composable
-fun TouchpadTutorialScreen(viewModelFactory: ViewModelProvider.Factory) {
+fun TouchpadTutorialScreen(viewModelFactory: ViewModelProvider.Factory, closeTutorial: () -> Unit) {
     val vm = viewModel<TouchpadTutorialViewModel>(factory = viewModelFactory)
     val activeScreen by vm.screen.collectAsStateWithLifecycle(STARTED)
     when (activeScreen) {
-        TUTORIAL_SELECTION -> TutorialSelectionScreen()
+        TUTORIAL_SELECTION ->
+            TutorialSelectionScreen(
+                onBackTutorialClicked = { vm.goTo(BACK_GESTURE) },
+                onHomeTutorialClicked = { vm.goTo(HOME_GESTURE) },
+                onActionKeyTutorialClicked = {},
+                onDoneButtonClicked = closeTutorial
+            )
         BACK_GESTURE -> BackGestureTutorialScreen()
         HOME_GESTURE -> HomeGestureTutorialScreen()
     }
 }
 
 @Composable
-fun TutorialSelectionScreen() {
-    val vm = viewModel<TutorialSelectionViewModel>(factory = TutorialSelectionViewModelFactory())
-}
-
-@Composable
 fun BackGestureTutorialScreen() {
     val vm = viewModel<BackGestureTutorialViewModel>(factory = GestureViewModelFactory())
 }
diff --git a/packages/SystemUI/src/com/android/systemui/touchpad/tutorial/ui/view/TutorialSelectionScreen.kt b/packages/SystemUI/src/com/android/systemui/touchpad/tutorial/ui/view/TutorialSelectionScreen.kt
new file mode 100644
index 0000000..532eb1b
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/touchpad/tutorial/ui/view/TutorialSelectionScreen.kt
@@ -0,0 +1,129 @@
+/*
+ * 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 androidx.compose.foundation.background
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.aspectRatio
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material3.Button
+import androidx.compose.material3.ButtonDefaults
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.unit.dp
+import com.android.systemui.res.R
+
+@Composable
+fun TutorialSelectionScreen(
+    onBackTutorialClicked: () -> Unit,
+    onHomeTutorialClicked: () -> Unit,
+    onActionKeyTutorialClicked: () -> Unit,
+    onDoneButtonClicked: () -> Unit,
+) {
+    Column(
+        verticalArrangement = Arrangement.Center,
+        modifier =
+            Modifier.background(
+                    color = MaterialTheme.colorScheme.surfaceContainer,
+                )
+                .fillMaxSize()
+    ) {
+        TutorialSelectionButtons(
+            onBackTutorialClicked = onBackTutorialClicked,
+            onHomeTutorialClicked = onHomeTutorialClicked,
+            onActionKeyTutorialClicked = onActionKeyTutorialClicked,
+            modifier = Modifier.padding(60.dp)
+        )
+        DoneButton(
+            onDoneButtonClicked = onDoneButtonClicked,
+            modifier = Modifier.padding(horizontal = 60.dp)
+        )
+    }
+}
+
+@Composable
+private fun TutorialSelectionButtons(
+    onBackTutorialClicked: () -> Unit,
+    onHomeTutorialClicked: () -> Unit,
+    onActionKeyTutorialClicked: () -> Unit,
+    modifier: Modifier = Modifier
+) {
+    Row(
+        horizontalArrangement = Arrangement.spacedBy(20.dp),
+        verticalAlignment = Alignment.CenterVertically,
+        modifier = modifier
+    ) {
+        TutorialButton(
+            text = stringResource(R.string.touchpad_tutorial_back_gesture_button),
+            onClick = onBackTutorialClicked,
+            color = MaterialTheme.colorScheme.primary,
+            modifier = Modifier.weight(1f)
+        )
+        TutorialButton(
+            text = stringResource(R.string.touchpad_tutorial_home_gesture_button),
+            onClick = onHomeTutorialClicked,
+            color = MaterialTheme.colorScheme.secondary,
+            modifier = Modifier.weight(1f)
+        )
+        TutorialButton(
+            text = stringResource(R.string.touchpad_tutorial_action_key_button),
+            onClick = onActionKeyTutorialClicked,
+            color = MaterialTheme.colorScheme.tertiary,
+            modifier = Modifier.weight(1f)
+        )
+    }
+}
+
+@Composable
+private fun TutorialButton(
+    text: String,
+    onClick: () -> Unit,
+    color: Color,
+    modifier: Modifier = Modifier
+) {
+    Button(
+        onClick = onClick,
+        shape = RoundedCornerShape(16.dp),
+        colors = ButtonDefaults.buttonColors(containerColor = color),
+        modifier = modifier.aspectRatio(0.66f)
+    ) {
+        Text(text = text, style = MaterialTheme.typography.headlineLarge)
+    }
+}
+
+@Composable
+private fun DoneButton(onDoneButtonClicked: () -> Unit, modifier: Modifier = Modifier) {
+    Row(
+        horizontalArrangement = Arrangement.End,
+        verticalAlignment = Alignment.CenterVertically,
+        modifier = modifier.fillMaxWidth()
+    ) {
+        Button(onClick = onDoneButtonClicked) {
+            Text(stringResource(R.string.touchpad_tutorial_done_button))
+        }
+    }
+}