From 75ad41effa37cd16cccda3f336af990a6090d310 Mon Sep 17 00:00:00 2001
From: Fabian Kozynski <kozynski@google.com>
Date: Fri, 6 Mar 2020 09:52:46 -0500
Subject: Adds a tooltip for multiple structures

Adds a tooltip (manager) to display tooltips in Controls surfaces. The
manager supports the following:

* The tooltip will not be shown after a certain number of times. Tracked
by a Shared Pref that is passed to the TooltipManager
* The tooltip will be shown pointing to a given position on screen
* The tooltip can be parametrized to show the arrow pointing up
(default) or down.

Fixes: 150707923
Test: manual

Change-Id: I70e7c38343a16ae6cd887a0fdcfa5b0f896e413e
---
 .../SystemUI/res/layout/controls_onboarding.xml    |  65 +++++++++
 .../res/layout/controls_structure_page.xml         |  13 +-
 packages/SystemUI/res/values/strings.xml           |   3 +
 packages/SystemUI/res/values/styles.xml            |   1 +
 .../SystemUI/src/com/android/systemui/Prefs.java   |   4 +-
 .../android/systemui/controls/TooltipManager.kt    | 160 +++++++++++++++++++++
 .../management/ControlsFavoritingActivity.kt       |  75 +++++++++-
 .../controls/management/ManagementPageIndicator.kt |   9 ++
 8 files changed, 315 insertions(+), 15 deletions(-)
 create mode 100644 packages/SystemUI/res/layout/controls_onboarding.xml
 create mode 100644 packages/SystemUI/src/com/android/systemui/controls/TooltipManager.kt

diff --git a/packages/SystemUI/res/layout/controls_onboarding.xml b/packages/SystemUI/res/layout/controls_onboarding.xml
new file mode 100644
index 000000000000..577a3b404472
--- /dev/null
+++ b/packages/SystemUI/res/layout/controls_onboarding.xml
@@ -0,0 +1,65 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2020 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.
+  -->
+
+<LinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_height="wrap_content"
+    android:layout_width="wrap_content"
+    android:padding="4dp"
+    android:orientation="vertical">
+
+    <View
+        android:id="@+id/arrow"
+        android:elevation="2dp"
+        android:layout_width="10dp"
+        android:layout_height="8dp"
+        android:layout_marginBottom="-2dp"
+        android:layout_gravity="center_horizontal"/>
+
+    <LinearLayout
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:paddingStart="24dp"
+        android:paddingEnd="4dp"
+        android:background="@drawable/recents_onboarding_toast_rounded_background"
+        android:layout_gravity="center_horizontal"
+        android:elevation="2dp"
+        android:orientation="horizontal">
+
+        <TextView
+            android:id="@+id/onboarding_text"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:layout_gravity="center_vertical"
+            android:textColor="?attr/wallpaperTextColor"
+            android:textSize="16sp"/>
+        <ImageView
+            android:id="@+id/dismiss"
+            android:layout_width="40dp"
+            android:layout_height="40dp"
+            android:layout_gravity="center_vertical"
+            android:padding="10dp"
+            android:layout_marginStart="2dp"
+            android:layout_marginEnd="2dp"
+            android:alpha="0.7"
+            android:src="@drawable/ic_close_white"
+            android:tint="?attr/wallpaperTextColor"
+            android:background="?android:attr/selectableItemBackgroundBorderless"
+            android:contentDescription="@string/accessibility_desc_close"/>
+    </LinearLayout>
+</LinearLayout>
\ No newline at end of file
diff --git a/packages/SystemUI/res/layout/controls_structure_page.xml b/packages/SystemUI/res/layout/controls_structure_page.xml
index 2c7e1681f2e1..047ab98eb191 100644
--- a/packages/SystemUI/res/layout/controls_structure_page.xml
+++ b/packages/SystemUI/res/layout/controls_structure_page.xml
@@ -15,17 +15,10 @@
   ~ limitations under the License.
   -->
 
-<androidx.core.widget.NestedScrollView
+<androidx.recyclerview.widget.RecyclerView
     xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/listAll"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:orientation="vertical"
-    android:layout_marginTop="@dimen/controls_management_list_margin">
-
-    <androidx.recyclerview.widget.RecyclerView
-        android:id="@+id/listAll"
-        android:layout_width="match_parent"
-        android:layout_height="match_parent"
-    />
-
-</androidx.core.widget.NestedScrollView>
\ No newline at end of file
+    android:layout_marginTop="@dimen/controls_management_list_margin"/>
\ No newline at end of file
diff --git a/packages/SystemUI/res/values/strings.xml b/packages/SystemUI/res/values/strings.xml
index caf22fe16beb..18fec29dd3cf 100644
--- a/packages/SystemUI/res/values/strings.xml
+++ b/packages/SystemUI/res/values/strings.xml
@@ -2653,4 +2653,7 @@
     <string name="controls_pin_verify">Verify device PIN</string>
     <!-- Controls PIN entry dialog, text hint [CHAR LIMIT=30] -->
     <string name="controls_pin_instructions">Enter PIN</string>
+
+    <!-- Tooltip to show in management screen when there are multiple structures [CHAR_LIMIT=50] -->
+    <string name="controls_structure_tooltip">Swipe to see other structures</string>
 </resources>
diff --git a/packages/SystemUI/res/values/styles.xml b/packages/SystemUI/res/values/styles.xml
index 125dd8f1d60c..47709108db1b 100644
--- a/packages/SystemUI/res/values/styles.xml
+++ b/packages/SystemUI/res/values/styles.xml
@@ -650,6 +650,7 @@
     <!-- Controls styles -->
     <style name="Theme.ControlsManagement" parent="@android:style/Theme.DeviceDefault.NoActionBar">
         <item name="android:windowIsTranslucent">false</item>
+        <item name="wallpaperTextColor">@*android:color/primary_text_material_dark</item>
     </style>
 
     <style name="TextAppearance.Control">
diff --git a/packages/SystemUI/src/com/android/systemui/Prefs.java b/packages/SystemUI/src/com/android/systemui/Prefs.java
index 5e6589f76c13..6aa2326c388a 100644
--- a/packages/SystemUI/src/com/android/systemui/Prefs.java
+++ b/packages/SystemUI/src/com/android/systemui/Prefs.java
@@ -59,7 +59,8 @@ public final class Prefs {
             Key.TOUCHED_RINGER_TOGGLE,
             Key.HAS_SEEN_ODI_CAPTIONS_TOOLTIP,
             Key.HAS_SEEN_BUBBLES_EDUCATION,
-            Key.HAS_SEEN_BUBBLES_MANAGE_EDUCATION
+            Key.HAS_SEEN_BUBBLES_MANAGE_EDUCATION,
+            Key.CONTROLS_STRUCTURE_SWIPE_TOOLTIP_COUNT
     })
     public @interface Key {
         @Deprecated
@@ -107,6 +108,7 @@ public final class Prefs {
         String HAS_SEEN_ODI_CAPTIONS_TOOLTIP = "HasSeenODICaptionsTooltip";
         String HAS_SEEN_BUBBLES_EDUCATION = "HasSeenBubblesOnboarding";
         String HAS_SEEN_BUBBLES_MANAGE_EDUCATION = "HasSeenBubblesManageOnboarding";
+        String CONTROLS_STRUCTURE_SWIPE_TOOLTIP_COUNT = "ControlsStructureSwipeTooltipCount";
     }
 
     public static boolean getBoolean(Context context, @Key String key, boolean defaultValue) {
diff --git a/packages/SystemUI/src/com/android/systemui/controls/TooltipManager.kt b/packages/SystemUI/src/com/android/systemui/controls/TooltipManager.kt
new file mode 100644
index 000000000000..6e17bc94b16b
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/controls/TooltipManager.kt
@@ -0,0 +1,160 @@
+/*
+ * Copyright (C) 2020 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.controls
+
+import android.annotation.StringRes
+import android.content.Context
+import android.graphics.CornerPathEffect
+import android.graphics.drawable.ShapeDrawable
+import android.util.TypedValue
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.view.animation.AccelerateInterpolator
+import android.view.animation.DecelerateInterpolator
+import android.widget.TextView
+import com.android.systemui.Prefs
+import com.android.systemui.R
+import com.android.systemui.recents.TriangleShape
+
+/**
+ * Manager for showing an onboarding tooltip on screen.
+ *
+ * The tooltip can be made to appear below or above a point. The number of times it will appear
+ * is determined by an shared preference (defined in [Prefs]).
+ *
+ * @property context A context to use to inflate the views and retrieve shared preferences from
+ * @property preferenceName name of the preference to use to track the number of times the tooltip
+ *                          has been shown.
+ * @property maxTimesShown the maximum number of times to show the tooltip
+ * @property below whether the tooltip should appear below (with up pointing arrow) or above (down
+ *                 pointing arrow) the specified point.
+ * @see [TooltipManager.show]
+ */
+class TooltipManager(
+    context: Context,
+    private val preferenceName: String,
+    private val maxTimesShown: Int = 2,
+    private val below: Boolean = true
+) {
+
+    companion object {
+        private const val SHOW_DELAY_MS: Long = 500
+        private const val SHOW_DURATION_MS: Long = 300
+        private const val HIDE_DURATION_MS: Long = 100
+    }
+
+    private var shown = Prefs.getInt(context, preferenceName, 0)
+
+    val layout: ViewGroup =
+        LayoutInflater.from(context).inflate(R.layout.controls_onboarding, null) as ViewGroup
+    val preferenceStorer = { num: Int ->
+        Prefs.putInt(context, preferenceName, num)
+    }
+
+    init {
+        layout.alpha = 0f
+    }
+
+    private val textView = layout.requireViewById<TextView>(R.id.onboarding_text)
+    private val dismissView = layout.requireViewById<View>(R.id.dismiss).apply {
+        setOnClickListener {
+            hide(true)
+        }
+    }
+
+    private val arrowView = layout.requireViewById<View>(R.id.arrow).apply {
+        val typedValue = TypedValue()
+        context.theme.resolveAttribute(android.R.attr.colorAccent, typedValue, true)
+        val toastColor = context.resources.getColor(typedValue.resourceId, context.theme)
+        val arrowRadius = context.resources.getDimensionPixelSize(
+            R.dimen.recents_onboarding_toast_arrow_corner_radius)
+        val arrowLp = layoutParams
+        val arrowDrawable = ShapeDrawable(TriangleShape.create(
+            arrowLp.width.toFloat(), arrowLp.height.toFloat(), below))
+        val arrowPaint = arrowDrawable.paint
+        arrowPaint.color = toastColor
+        // The corner path effect won't be reflected in the shadow, but shouldn't be noticeable.
+        arrowPaint.pathEffect = CornerPathEffect(arrowRadius.toFloat())
+        setBackground(arrowDrawable)
+    }
+
+    init {
+        if (!below) {
+            layout.removeView(arrowView)
+            layout.addView(arrowView)
+            (arrowView.layoutParams as ViewGroup.MarginLayoutParams).apply {
+                bottomMargin = topMargin
+                topMargin = 0
+            }
+        }
+    }
+
+    /**
+     * Show the tooltip
+     *
+     * @param stringRes the id of the string to show in the tooltip
+     * @param x horizontal position (w.r.t. screen) for the arrow point
+     * @param y vertical position (w.r.t. screen) for the arrow point
+     */
+    fun show(@StringRes stringRes: Int, x: Int, y: Int) {
+        if (!shouldShow()) return
+        textView.setText(stringRes)
+        shown++
+        preferenceStorer(shown)
+        layout.post {
+            val p = IntArray(2)
+            layout.getLocationOnScreen(p)
+            layout.translationX = (x - p[0] - layout.width / 2).toFloat()
+            layout.translationY = (y - p[1]).toFloat() - if (!below) layout.height else 0
+            if (layout.alpha == 0f) {
+                layout.animate()
+                    .alpha(1f)
+                    .withLayer()
+                    .setStartDelay(SHOW_DELAY_MS)
+                    .setDuration(SHOW_DURATION_MS)
+                    .setInterpolator(DecelerateInterpolator())
+                    .start()
+            }
+        }
+    }
+
+    /**
+     * Hide the tooltip
+     *
+     * @param animate whether to animate the fade out
+     */
+    fun hide(animate: Boolean = false) {
+        if (layout.alpha == 0f) return
+        layout.post {
+            if (animate) {
+                layout.animate()
+                    .alpha(0f)
+                    .withLayer()
+                    .setStartDelay(0)
+                    .setDuration(HIDE_DURATION_MS)
+                    .setInterpolator(AccelerateInterpolator())
+                    .start()
+            } else {
+                layout.animate().cancel()
+                layout.alpha = 0f
+            }
+        }
+    }
+
+    private fun shouldShow() = shown < maxTimesShown
+}
\ No newline at end of file
diff --git a/packages/SystemUI/src/com/android/systemui/controls/management/ControlsFavoritingActivity.kt b/packages/SystemUI/src/com/android/systemui/controls/management/ControlsFavoritingActivity.kt
index 04715abe5f99..502354a8703a 100644
--- a/packages/SystemUI/src/com/android/systemui/controls/management/ControlsFavoritingActivity.kt
+++ b/packages/SystemUI/src/com/android/systemui/controls/management/ControlsFavoritingActivity.kt
@@ -19,22 +19,27 @@ package com.android.systemui.controls.management
 import android.app.Activity
 import android.content.ComponentName
 import android.content.Intent
+import android.content.res.Configuration
 import android.graphics.drawable.Drawable
 import android.os.Bundle
 import android.text.TextUtils
+import android.view.Gravity
 import android.view.View
+import android.view.ViewGroup
 import android.view.ViewStub
 import android.widget.Button
+import android.widget.FrameLayout
 import android.widget.ImageView
 import android.widget.TextView
 import androidx.viewpager2.widget.ViewPager2
+import com.android.systemui.Prefs
 import com.android.systemui.R
 import com.android.systemui.broadcast.BroadcastDispatcher
 import com.android.systemui.controls.ControlsServiceInfo
+import com.android.systemui.controls.TooltipManager
 import com.android.systemui.controls.controller.ControlsControllerImpl
 import com.android.systemui.controls.controller.StructureInfo
 import com.android.systemui.dagger.qualifiers.Main
-import com.android.systemui.qs.PageIndicator
 import com.android.systemui.settings.CurrentUserTracker
 import java.text.Collator
 import java.util.concurrent.Executor
@@ -51,6 +56,8 @@ class ControlsFavoritingActivity @Inject constructor(
     companion object {
         private const val TAG = "ControlsFavoritingActivity"
         const val EXTRA_APP = "extra_app_label"
+        private const val TOOLTIP_PREFS_KEY = Prefs.Key.CONTROLS_STRUCTURE_SWIPE_TOOLTIP_COUNT
+        private const val TOOLTIP_MAX_SHOWN = 2
     }
 
     private var component: ComponentName? = null
@@ -61,7 +68,8 @@ class ControlsFavoritingActivity @Inject constructor(
     private lateinit var titleView: TextView
     private lateinit var iconView: ImageView
     private lateinit var iconFrame: View
-    private lateinit var pageIndicator: PageIndicator
+    private lateinit var pageIndicator: ManagementPageIndicator
+    private var mTooltipManager: TooltipManager? = null
     private var listOfStructures = emptyList<StructureContainer>()
 
     private lateinit var comparator: Comparator<StructureContainer>
@@ -172,9 +180,48 @@ class ControlsFavoritingActivity @Inject constructor(
             layoutResource = R.layout.controls_management_favorites
             inflate()
         }
-
         statusText = requireViewById(R.id.status_message)
-        pageIndicator = requireViewById(R.id.structure_page_indicator)
+        if (shouldShowTooltip()) {
+            mTooltipManager = TooltipManager(statusText.context,
+                TOOLTIP_PREFS_KEY, TOOLTIP_MAX_SHOWN)
+            addContentView(
+                mTooltipManager?.layout,
+                FrameLayout.LayoutParams(
+                    ViewGroup.LayoutParams.WRAP_CONTENT,
+                    ViewGroup.LayoutParams.WRAP_CONTENT,
+                    Gravity.TOP or Gravity.LEFT
+                )
+            )
+        }
+        pageIndicator = requireViewById<ManagementPageIndicator>(
+            R.id.structure_page_indicator).apply {
+            addOnLayoutChangeListener(object : View.OnLayoutChangeListener {
+                override fun onLayoutChange(
+                    v: View,
+                    left: Int,
+                    top: Int,
+                    right: Int,
+                    bottom: Int,
+                    oldLeft: Int,
+                    oldTop: Int,
+                    oldRight: Int,
+                    oldBottom: Int
+                ) {
+                    if (v.visibility == View.VISIBLE && mTooltipManager != null) {
+                        val p = IntArray(2)
+                        v.getLocationOnScreen(p)
+                        val x = p[0] + (right - left) / 2
+                        val y = p[1] + bottom - top
+                        mTooltipManager?.show(R.string.controls_structure_tooltip, x, y)
+                    }
+                }
+            })
+            visibilityListener = {
+                if (it != View.VISIBLE) {
+                    mTooltipManager?.hide(true)
+                }
+            }
+        }
 
         titleView = requireViewById<TextView>(R.id.title).apply {
             text = appName ?: resources.getText(R.string.controls_favorite_default_title)
@@ -184,6 +231,12 @@ class ControlsFavoritingActivity @Inject constructor(
         iconView = requireViewById(com.android.internal.R.id.icon)
         iconFrame = requireViewById(R.id.icon_frame)
         structurePager = requireViewById<ViewPager2>(R.id.structure_pager)
+        structurePager.registerOnPageChangeCallback(object : ViewPager2.OnPageChangeCallback() {
+            override fun onPageSelected(position: Int) {
+                super.onPageSelected(position)
+                mTooltipManager?.hide(true)
+            }
+        })
         bindButtons()
     }
 
@@ -207,11 +260,25 @@ class ControlsFavoritingActivity @Inject constructor(
         }
     }
 
+    override fun onPause() {
+        super.onPause()
+        mTooltipManager?.hide(false)
+    }
+
+    override fun onConfigurationChanged(newConfig: Configuration) {
+        super.onConfigurationChanged(newConfig)
+        mTooltipManager?.hide(false)
+    }
+
     override fun onDestroy() {
         currentUserTracker.stopTracking()
         listingController.removeCallback(listingCallback)
         super.onDestroy()
     }
+
+    private fun shouldShowTooltip(): Boolean {
+        return Prefs.getInt(applicationContext, TOOLTIP_PREFS_KEY, 0) < TOOLTIP_MAX_SHOWN
+    }
 }
 
 data class StructureContainer(val structureName: CharSequence, val model: ControlsModel)
diff --git a/packages/SystemUI/src/com/android/systemui/controls/management/ManagementPageIndicator.kt b/packages/SystemUI/src/com/android/systemui/controls/management/ManagementPageIndicator.kt
index 4289274cb3e4..72b10982e237 100644
--- a/packages/SystemUI/src/com/android/systemui/controls/management/ManagementPageIndicator.kt
+++ b/packages/SystemUI/src/com/android/systemui/controls/management/ManagementPageIndicator.kt
@@ -40,4 +40,13 @@ class ManagementPageIndicator(
             super.setLocation(location)
         }
     }
+
+    var visibilityListener: (Int) -> Unit = {}
+
+    override fun onVisibilityChanged(changedView: View, visibility: Int) {
+        super.onVisibilityChanged(changedView, visibility)
+        if (changedView == this) {
+            visibilityListener(visibility)
+        }
+    }
 }
\ No newline at end of file
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