[QS] Add header tooltip for long press

Added some hooks in animator to pass along expanded/animating/collapsed
state in a more clear manner. Added tooltip view with the teaser text to
animate in at the top of the view (and fade out either when we start
animating or automatically after 5 seconds).

Added prefs for tracking how often tooltip is shown/hiding it based on
that number.

Updated dimensions for correct spacing (based on redlines).

Test: Visually
Bug: 72528203

Change-Id: I70e4654ed95057fac6d8dbb890d575c2a5d9f215
diff --git a/packages/SystemUI/src/com/android/systemui/qs/QSPanel.java b/packages/SystemUI/src/com/android/systemui/qs/QSPanel.java
index cdcc5e6..476cb40 100644
--- a/packages/SystemUI/src/com/android/systemui/qs/QSPanel.java
+++ b/packages/SystemUI/src/com/android/systemui/qs/QSPanel.java
@@ -18,6 +18,7 @@
 
 import static com.android.systemui.qs.tileimpl.QSTileImpl.getColorForState;
 
+import android.annotation.Nullable;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.res.Configuration;
@@ -57,6 +58,7 @@
 public class QSPanel extends LinearLayout implements Tunable, Callback, BrightnessMirrorListener {
 
     public static final String QS_SHOW_BRIGHTNESS = "qs_show_brightness";
+    public static final String QS_SHOW_LONG_PRESS_TOOLTIP = "qs_show_long_press";
 
     protected final Context mContext;
     protected final ArrayList<TileRecord> mRecords = new ArrayList<TileRecord>();
@@ -72,6 +74,7 @@
     private BrightnessController mBrightnessController;
     protected QSTileHost mHost;
 
+    protected QSTooltipView mTooltipView;
     protected QSSecurityFooter mFooter;
     private boolean mGridContentVisible = true;
 
@@ -93,6 +96,11 @@
 
         setOrientation(VERTICAL);
 
+        mTooltipView = (QSTooltipView) LayoutInflater.from(mContext)
+                .inflate(R.layout.quick_settings_header, this, false);
+
+        addView(mTooltipView);
+
         mBrightnessView = LayoutInflater.from(mContext).inflate(
             R.layout.quick_settings_brightness_dialog, this, false);
         addView(mBrightnessView);
@@ -142,7 +150,10 @@
     @Override
     protected void onAttachedToWindow() {
         super.onAttachedToWindow();
-        Dependency.get(TunerService.class).addTunable(this, QS_SHOW_BRIGHTNESS);
+        final TunerService tunerService = Dependency.get(TunerService.class);
+        tunerService.addTunable(this, QS_SHOW_BRIGHTNESS);
+        tunerService.addTunable(this, QS_SHOW_LONG_PRESS_TOOLTIP);
+
         if (mHost != null) {
             setTiles(mHost.getTiles());
         }
@@ -174,11 +185,16 @@
     @Override
     public void onTuningChanged(String key, String newValue) {
         if (QS_SHOW_BRIGHTNESS.equals(key)) {
-            mBrightnessView.setVisibility(newValue == null || Integer.parseInt(newValue) != 0
-                    ? VISIBLE : GONE);
+            updateViewVisibilityForTuningValue(mBrightnessView, newValue);
+        } else if (QS_SHOW_LONG_PRESS_TOOLTIP.equals(key)) {
+            updateViewVisibilityForTuningValue(mTooltipView, newValue);
         }
     }
 
+    private void updateViewVisibilityForTuningValue(View view, @Nullable String newValue) {
+        view.setVisibility(newValue == null || Integer.parseInt(newValue) != 0 ? VISIBLE : GONE);
+    }
+
     public void openDetails(String subPanel) {
         QSTile tile = getTile(subPanel);
         showDetailAdapter(true, tile.getDetailAdapter(), new int[]{getWidth() / 2, 0});
@@ -213,6 +229,10 @@
         return mBrightnessView;
     }
 
+    View getHeaderView() {
+        return mTooltipView;
+    }
+
     public void setCallback(QSDetail.Callback callback) {
         mCallback = callback;
     }
@@ -269,6 +289,21 @@
         if (mCustomizePanel != null && mCustomizePanel.isShown()) {
             mCustomizePanel.hide(mCustomizePanel.getWidth() / 2, mCustomizePanel.getHeight() / 2);
         }
+
+        // Instantly hide the header here since we don't want it to still be animating.
+        mTooltipView.setVisibility(View.INVISIBLE);
+    }
+
+    /**
+     * Called when the panel is fully animated out/expanded. This is different from the state
+     * tracked by {@link #mExpanded}, which only checks if the panel is even partially pulled out.
+     */
+    public void onExpanded() {
+        mTooltipView.fadeIn();
+    }
+
+    public void onAnimating() {
+        mTooltipView.fadeOut();
     }
 
     public void setExpanded(boolean expanded) {