Bubble bar user education

Launcher support for the user education logic described in ag/24587530.

Bug: 275077944
Test: TBD
Flag: WM_BUBBLE_BAR
Change-Id: I2b9a6ecde332de6305ad574c41d8322d8bb5d7ad

quickstep/src/com/android/launcher3/taskbar/bubbles/BubbleBarViewController.java

@@ -18,6 +18,7 @@ package com.android.launcher3.taskbar.bubbles;
 import static android.view.View.INVISIBLE;
 import static android.view.View.VISIBLE;
 
+import android.graphics.Point;
 import android.graphics.Rect;
 import android.util.Log;
 import android.view.MotionEvent;
@@ -75,6 +76,7 @@ public class BubbleBarViewController {
     private boolean mHiddenForSysui;
     // Whether the bar is hidden because there are no bubbles.
     private boolean mHiddenForNoBubbles;
+    private boolean mShouldShowEducation;
 
     public BubbleBarViewController(TaskbarActivityContext activity, BubbleBarView barView) {
         mActivity = activity;
@@ -98,7 +100,7 @@ public class BubbleBarViewController {
         mBarView.getLayoutParams().height = mActivity.getDeviceProfile().taskbarHeight;
         mBubbleBarScale.updateValue(1f);
         mBubbleClickListener = v -> onBubbleClicked(v);
-        mBubbleBarClickListener = v -> setExpanded(true);
+        mBubbleBarClickListener = v -> onBubbleBarClicked();
         mBubbleDragController.setupBubbleBarView(mBarView);
         mBarView.setOnClickListener(mBubbleBarClickListener);
         mBarView.addOnLayoutChangeListener((view, i, i1, i2, i3, i4, i5, i6, i7) ->
@@ -121,6 +123,21 @@ public class BubbleBarViewController {
         }
     }
 
+    private void onBubbleBarClicked() {
+        if (mShouldShowEducation) {
+            mShouldShowEducation = false;
+            // Get the bubble bar bounds on screen
+            Rect bounds = new Rect();
+            mBarView.getBoundsOnScreen(bounds);
+            // Calculate user education reference position in Screen coordinates
+            Point position = new Point(bounds.centerX(), bounds.top);
+            // Show user education relative to the reference point
+            mSystemUiProxy.showUserEducation(position);
+        } else {
+            setExpanded(true);
+        }
+    }
+
     //
     // The below animators are exposed to BubbleStashController so it can manage the stashing
     // animation.
@@ -326,6 +343,12 @@ public class BubbleBarViewController {
         }
     }
 
+    /** Marks as should show education and shows the bubble bar in a collapsed state */
+    public void prepareToShowEducation() {
+        mShouldShowEducation = true;
+        mBubbleStashController.showBubbleBar(false /* expand the bubbles */);
+    }
+
     /**
      * Updates the dragged bubble view in the bubble bar view, and notifies SystemUI
      * that a bubble is being dragged to dismiss.