Add a click listener to QQS drag handler

That way, QS can be expanded by clicking on it

Test: manual
Fixes: 198453772
Change-Id: I766d0236452ddf6271a97d065e35414d6a6d428b

packages/SystemUI/src/com/android/systemui/qs/QSContainerImpl.java

@@ -208,9 +208,17 @@ public class QSContainerImpl extends FrameLayout implements Dumpable {
 
     protected int calculateContainerHeight() {
         int heightOverride = mHeightOverride != -1 ? mHeightOverride : getMeasuredHeight();
+        // Need to add the dragHandle height so touches will be intercepted by it.
+        int dragHandleHeight;
+        if (mDragHandle.getVisibility() == VISIBLE) {
+            dragHandleHeight = Math.round((1 - mQsExpansion) * mDragHandle.getHeight());
+        } else {
+            dragHandleHeight = 0;
+        }
         return mQSCustomizer.isCustomizing() ? mQSCustomizer.getHeight()
                 : Math.round(mQsExpansion * (heightOverride - mHeader.getHeight()))
-                + mHeader.getHeight();
+                + mHeader.getHeight()
+                + dragHandleHeight;
     }
 
     int calculateContainerBottom() {
@@ -226,6 +234,7 @@ public class QSContainerImpl extends FrameLayout implements Dumpable {
         mQsExpansion = expansion;
         mQSPanelContainer.setScrollingEnabled(expansion > 0f);
         mDragHandle.setAlpha(1.0f - expansion);
+        mDragHandle.setClickable(expansion == 0f); // Only clickable when fully collapsed
         updateExpansion();
     }
 

packages/SystemUI/src/com/android/systemui/qs/QSFragment.java

@@ -37,7 +37,6 @@ import android.widget.ImageView;
 import androidx.annotation.Nullable;
 import androidx.annotation.VisibleForTesting;
 
-import com.android.systemui.Dumpable;
 import com.android.systemui.R;
 import com.android.systemui.animation.Interpolators;
 import com.android.systemui.dump.DumpManager;
@@ -238,6 +237,11 @@ public class QSFragment extends LifecycleFragment implements QS, CommandQueue.Ca
                     mQSPanelController.getMediaHost().getHostView().setAlpha(1.0f);
                     mQSAnimator.requestAnimatorUpdate();
                 });
+
+        mQsDragHandler.setOnClickListener(v -> {
+            Log.d(TAG, "drag handler clicked");
+            mCommandQueue.animateExpandSettingsPanel(null);
+        });
     }
 
     @Override