Merge "Adding tooltip for Select button." into ub-launcher3-rvc-dev am: 8449aeaf6e

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/11818768

Change-Id: Iddf677b95e4e8317b656d25a8497632bbce91890
diff --git a/res/layout/arrow_toast.xml b/res/layout/arrow_toast.xml
index 2c97e89..0ec9981 100644
--- a/res/layout/arrow_toast.xml
+++ b/res/layout/arrow_toast.xml
@@ -60,6 +60,5 @@
         android:elevation="2dp"
         android:layout_width="10dp"
         android:layout_height="8dp"
-        android:layout_marginTop="-2dp"
-        android:layout_gravity="center_horizontal"/>
+        android:layout_marginTop="-2dp"/>
 </merge>
diff --git a/src/com/android/launcher3/views/ArrowTipView.java b/src/com/android/launcher3/views/ArrowTipView.java
index a7575d1..b4a6b14 100644
--- a/src/com/android/launcher3/views/ArrowTipView.java
+++ b/src/com/android/launcher3/views/ArrowTipView.java
@@ -125,11 +125,35 @@
      * Show Tip with specified string and Y location
      */
     public ArrowTipView show(String text, int top) {
+        return show(text, Gravity.CENTER_HORIZONTAL, 0, top);
+    }
+
+    /**
+     * Show the ArrowTipView (tooltip) center, start, or end aligned.
+     *
+     * @param text The text to be shown in the tooltip.
+     * @param gravity The gravity aligns the tooltip center, start, or end.
+     * @param arrowMarginStart The margin from start to place arrow (ignored if center)
+     * @param top  The Y coordinate of the bottom of tooltip.
+     * @return The tooltip.
+     */
+    public ArrowTipView show(String text, int gravity, int arrowMarginStart, int top) {
         ((TextView) findViewById(R.id.text)).setText(text);
-        mActivity.getDragLayer().addView(this);
+        ViewGroup parent = mActivity.getDragLayer();
+        parent.addView(this);
 
         DragLayer.LayoutParams params = (DragLayer.LayoutParams) getLayoutParams();
-        params.gravity = Gravity.CENTER_HORIZONTAL;
+        params.gravity = gravity;
+        LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams) findViewById(
+                R.id.arrow).getLayoutParams();
+        lp.gravity = gravity;
+        if (gravity == Gravity.END) {
+            lp.setMarginEnd(parent.getMeasuredWidth() - arrowMarginStart);
+        } else if (gravity == Gravity.START) {
+            lp.setMarginStart(arrowMarginStart);
+        }
+        requestLayout();
+
         params.leftMargin = mActivity.getDeviceProfile().workspacePadding.left;
         params.rightMargin = mActivity.getDeviceProfile().workspacePadding.right;
         post(() -> setY(top - getHeight()));