src/com/android/systemui/car/statusicon/StatusIconPanelController.java - platform/packages/apps/Car/SystemUI - Git at Google

 /*
  * Copyright (C) 2021 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.car.statusicon;

 import static android.view.WindowManager.LayoutParams.TYPE_SYSTEM_DIALOG;
 import static android.widget.ListPopupWindow.WRAP_CONTENT;

 import android.annotation.ColorInt;
 import android.annotation.DimenRes;
 import android.annotation.LayoutRes;
 import android.car.Car;
 import android.car.user.CarUserManager;
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
 import android.os.UserHandle;
 import android.view.Gravity;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.view.ViewTreeObserver;
 import android.view.WindowManager;
 import android.widget.ImageView;
 import android.widget.PopupWindow;

 import androidx.annotation.VisibleForTesting;

 import com.android.car.ui.FocusParkingView;
 import com.android.car.ui.utils.ViewUtils;
 import com.android.systemui.R;
 import com.android.systemui.broadcast.BroadcastDispatcher;
 import com.android.systemui.car.CarServiceProvider;
 import com.android.systemui.car.qc.SystemUIQCView;

 import java.util.ArrayList;

 /**
  * A controller for a panel view associated with a status icon.
  */
 public class StatusIconPanelController {
     private static final int DEFAULT_POPUP_WINDOW_ANCHOR_GRAVITY = Gravity.TOP | Gravity.START;

     private final Context mContext;
     private final String mIdentifier;
     private final String mIconTag;
     private final @ColorInt int mIconHighlightedColor;
     private final @ColorInt int mIconNotHighlightedColor;
     private final int mYOffsetPixel;
     private final ArrayList<SystemUIQCView> mQCViews = new ArrayList<>();

     private PopupWindow mPanel;
     private ViewGroup mPanelContent;
     private OnQcViewsFoundListener mOnQcViewsFoundListener;
     private View mAnchorView;
     private ImageView mStatusIconView;
     private float mDimValue = -1.0f;
     private boolean mUserSwitchEventRegistered;

     private final CarUserManager.UserLifecycleListener mUserLifecycleListener = event -> {
         if (event.getEventType() == CarUserManager.USER_LIFECYCLE_EVENT_TYPE_SWITCHING) {
             reset();
         }
     };

     private final BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() {
         @Override
         public void onReceive(Context context, Intent intent) {
             String action = intent.getAction();
             boolean isIntentFromSelf =
                     intent.getIdentifier() != null && intent.getIdentifier().equals(mIdentifier);

             if (Intent.ACTION_CLOSE_SYSTEM_DIALOGS.equals(action) && !isIntentFromSelf
                     && mPanel != null && mPanel.isShowing()) {
                 mPanel.dismiss();
             }
         }
     };

     private final ViewTreeObserver.OnGlobalFocusChangeListener mFocusChangeListener =
             (oldFocus, newFocus) -> {
                 if (mPanel != null && oldFocus != null && newFocus instanceof FocusParkingView) {
                     // When nudging out of the panel, RotaryService will focus on the
                     // FocusParkingView to clear the focus highlight. When this occurs, dismiss the
                     // panel.
                     mPanel.dismiss();
                 }
             };

     public StatusIconPanelController(
             Context context,
             CarServiceProvider carServiceProvider,
             BroadcastDispatcher broadcastDispatcher) {
         mContext = context;
         mIdentifier = Integer.toString(System.identityHashCode(this));

         mIconTag = mContext.getResources().getString(R.string.qc_icon_tag);
         mIconHighlightedColor = mContext.getColor(R.color.status_icon_highlighted_color);
         mIconNotHighlightedColor = mContext.getColor(R.color.status_icon_not_highlighted_color);

         int panelMarginTop = mContext.getResources().getDimensionPixelSize(
                 R.dimen.car_status_icon_panel_margin_top);
         int topSystemBarHeight = mContext.getResources().getDimensionPixelSize(
                 R.dimen.car_top_system_bar_height);
         // Cancel out the superfluous inset automatically applied to the panel.
         mYOffsetPixel = panelMarginTop - topSystemBarHeight;

         broadcastDispatcher.registerReceiver(mBroadcastReceiver,
                 new IntentFilter(Intent.ACTION_CLOSE_SYSTEM_DIALOGS), /* executor= */ null,
                 UserHandle.ALL);

         carServiceProvider.addListener(car -> {
             CarUserManager carUserManager = (CarUserManager) car.getCarManager(
                     Car.CAR_USER_SERVICE);
             if (!mUserSwitchEventRegistered) {
                 carUserManager.addListener(Runnable::run, mUserLifecycleListener);
                 mUserSwitchEventRegistered = true;
             }
         });
     }

     /**
      * @return list of {@link SystemUIQCView} in this controller
      */
     public ArrayList<SystemUIQCView> getQCViews() {
         return mQCViews;
     }

     public void setOnQcViewsFoundListener(OnQcViewsFoundListener onQcViewsFoundListener) {
         mOnQcViewsFoundListener = onQcViewsFoundListener;
     }

     /**
      * A listener that can be used to attach controllers quick control panels using
      * {@link SystemUIQCView#getLocalQCProvider()}
      */
     public interface OnQcViewsFoundListener {
         /**
          * This method is call up when {@link SystemUIQCView}s are found
          */
         void qcViewsFound(ArrayList<SystemUIQCView> qcViews);
     }

     /**
      * Attaches a panel to a root view that toggles the panel visibility when clicked.
      *
      * Variant of {@link #attachPanel(View, int, int, int, int, int)} with
      * xOffset={@code 0}, yOffset={@link #mYOffsetPixel} &
      * gravity={@link #DEFAULT_POPUP_WINDOW_ANCHOR_GRAVITY}.
      */
     public void attachPanel(View view, @LayoutRes int layoutRes, @DimenRes int widthRes) {
         attachPanel(view, layoutRes, widthRes, DEFAULT_POPUP_WINDOW_ANCHOR_GRAVITY);
     }

     /**
      * Attaches a panel to a root view that toggles the panel visibility when clicked.
      *
      * Variant of {@link #attachPanel(View, int, int, int, int, int)} with
      * xOffset={@code 0} & yOffset={@link #mYOffsetPixel}.
      */
     public void attachPanel(View view, @LayoutRes int layoutRes, @DimenRes int widthRes,
             int gravity) {
         attachPanel(view, layoutRes, widthRes, /* xOffset= */ 0, mYOffsetPixel,
                 gravity);
     }

     /**
      * Attaches a panel to a root view that toggles the panel visibility when clicked.
      *
      * Variant of {@link #attachPanel(View, int, int, int, int, int)} with
      * gravity={@link #DEFAULT_POPUP_WINDOW_ANCHOR_GRAVITY}.
      */
     public void attachPanel(View view, @LayoutRes int layoutRes, @DimenRes int widthRes,
             int xOffset, int yOffset) {
         attachPanel(view, layoutRes, widthRes, xOffset, yOffset,
                 DEFAULT_POPUP_WINDOW_ANCHOR_GRAVITY);
     }

     /**
      * Attaches a panel to a root view that toggles the panel visibility when clicked.
      */
     public void attachPanel(View view, @LayoutRes int layoutRes, @DimenRes int widthRes,
             int xOffset, int yOffset, int gravity) {
         if (mAnchorView == null) {
             mAnchorView = view;
         }

         mAnchorView.setOnClickListener(v -> {
             if (mPanel == null) {
                 mPanel = createPanel(layoutRes, widthRes);
             }

             if (mPanel.isShowing()) {
                 mPanel.dismiss();
                 return;
             }

             // Dismiss all currently open system dialogs before opening this panel.
             Intent intent = new Intent(Intent.ACTION_CLOSE_SYSTEM_DIALOGS);
             intent.setIdentifier(mIdentifier);
             mContext.sendBroadcastAsUser(intent, UserHandle.CURRENT);

             mQCViews.forEach(qcView -> qcView.listen(true));

             // Clear the focus highlight in this window since a dialog window is about to show.
             // TODO(b/201700195): remove this workaround once the window focus issue is fixed.
             if (view.isFocused()) {
                 ViewUtils.hideFocus(view.getRootView());
             }
             registerFocusListener(true);

             // TODO(b/202563671): remove yOffsetPixel when the PopupWindow API is updated.
             mPanel.showAsDropDown(mAnchorView, xOffset, yOffset, gravity);
             mAnchorView.setSelected(true);
             highlightStatusIcon(true);

             dimBehind(mPanel);
         });
     }

     @VisibleForTesting
     protected PopupWindow getPanel() {
         return mPanel;
     }

     @VisibleForTesting
     protected BroadcastReceiver getBroadcastReceiver() {
         return mBroadcastReceiver;
     }

     @VisibleForTesting
     protected String getIdentifier() {
         return mIdentifier;
     }

     @VisibleForTesting
     @ColorInt
     protected int getIconHighlightedColor() {
         return mIconHighlightedColor;
     }

     @VisibleForTesting
     @ColorInt
     protected int getIconNotHighlightedColor() {
         return mIconNotHighlightedColor;
     }

     private PopupWindow createPanel(@LayoutRes int layoutRes, @DimenRes int widthRes) {
         int panelWidth = mContext.getResources().getDimensionPixelSize(widthRes);

         mPanelContent = (ViewGroup) LayoutInflater.from(mContext).inflate(layoutRes, /* root= */
                 null);
         findQcViews(mPanelContent);
         if (mOnQcViewsFoundListener != null) {
             mOnQcViewsFoundListener.qcViewsFound(mQCViews);
         }
         PopupWindow panel = new PopupWindow(mPanelContent, panelWidth, WRAP_CONTENT);
         panel.setBackgroundDrawable(
                 mContext.getResources().getDrawable(R.drawable.status_icon_panel_bg,
                         mContext.getTheme()));
         panel.setWindowLayoutType(TYPE_SYSTEM_DIALOG);
         panel.setFocusable(true);
         panel.setOutsideTouchable(false);
         panel.setOnDismissListener(new PopupWindow.OnDismissListener() {
             @Override
             public void onDismiss() {
                 mAnchorView.setSelected(false);
                 highlightStatusIcon(false);
                 registerFocusListener(false);
                 mQCViews.forEach(qcView -> qcView.listen(false));
             }
         });
         addFocusParkingView();

         return panel;
     }

     private void dimBehind(PopupWindow popupWindow) {
         View container = popupWindow.getContentView().getRootView();
         WindowManager wm = mContext.getSystemService(WindowManager.class);

         if (wm == null) return;

         if (mDimValue < 0) {
             mDimValue = mContext.getResources().getFloat(R.dimen.car_status_icon_panel_dim);
         }

         WindowManager.LayoutParams lp = (WindowManager.LayoutParams) container.getLayoutParams();
         lp.flags |= WindowManager.LayoutParams.FLAG_DIM_BEHIND;
         lp.dimAmount = mDimValue;
         wm.updateViewLayout(container, lp);
     }

     /**
      * Add a FocusParkingView to the panel content to prevent rotary controller rotation wrapping
      * around in the panel - this only should be called once per panel.
      */
     private void addFocusParkingView() {
         if (mPanelContent != null) {
             FocusParkingView fpv = new FocusParkingView(mContext);
             mPanelContent.addView(fpv);
         }
     }

     private void registerFocusListener(boolean register) {
         if (mPanelContent == null) {
             return;
         }
         if (register) {
             mPanelContent.getViewTreeObserver().addOnGlobalFocusChangeListener(
                     mFocusChangeListener);
         } else {
             mPanelContent.getViewTreeObserver().removeOnGlobalFocusChangeListener(
                     mFocusChangeListener);
         }
     }

     private void reset() {
         if (mPanel == null) return;

         mPanel.dismiss();
         mPanel = null;
         mPanelContent = null;
         mOnQcViewsFoundListener = null;
         mQCViews.forEach(v -> v.destroy());
         mQCViews.clear();
     }

     private void findQcViews(ViewGroup rootView) {
         for (int i = 0; i < rootView.getChildCount(); i++) {
             View v = rootView.getChildAt(i);
             if (v instanceof SystemUIQCView) {
                 mQCViews.add((SystemUIQCView) v);
             } else if (v instanceof ViewGroup) {
                 this.findQcViews((ViewGroup) v);
             }
         }
     }

     private void highlightStatusIcon(boolean isHighlighted) {
         if (mStatusIconView == null) {
             mStatusIconView = mAnchorView.findViewWithTag(mIconTag);
         }

         if (mStatusIconView != null) {
             mStatusIconView.setColorFilter(
                     isHighlighted ? mIconHighlightedColor : mIconNotHighlightedColor);
         }
     }
 }
	/*
	* Copyright (C) 2021 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.car.statusicon;

	import static android.view.WindowManager.LayoutParams.TYPE_SYSTEM_DIALOG;
	import static android.widget.ListPopupWindow.WRAP_CONTENT;

	import android.annotation.ColorInt;
	import android.annotation.DimenRes;
	import android.annotation.LayoutRes;
	import android.car.Car;
	import android.car.user.CarUserManager;
	import android.content.BroadcastReceiver;
	import android.content.Context;
	import android.content.Intent;
	import android.content.IntentFilter;
	import android.os.UserHandle;
	import android.view.Gravity;
	import android.view.LayoutInflater;
	import android.view.View;
	import android.view.ViewGroup;
	import android.view.ViewTreeObserver;
	import android.view.WindowManager;
	import android.widget.ImageView;
	import android.widget.PopupWindow;

	import androidx.annotation.VisibleForTesting;

	import com.android.car.ui.FocusParkingView;
	import com.android.car.ui.utils.ViewUtils;
	import com.android.systemui.R;
	import com.android.systemui.broadcast.BroadcastDispatcher;
	import com.android.systemui.car.CarServiceProvider;
	import com.android.systemui.car.qc.SystemUIQCView;

	import java.util.ArrayList;

	/**
	* A controller for a panel view associated with a status icon.
	*/
	public class StatusIconPanelController {
	private static final int DEFAULT_POPUP_WINDOW_ANCHOR_GRAVITY = Gravity.TOP \| Gravity.START;

	private final Context mContext;
	private final String mIdentifier;
	private final String mIconTag;
	private final @ColorInt int mIconHighlightedColor;
	private final @ColorInt int mIconNotHighlightedColor;
	private final int mYOffsetPixel;
	private final ArrayList<SystemUIQCView> mQCViews = new ArrayList<>();

	private PopupWindow mPanel;
	private ViewGroup mPanelContent;
	private OnQcViewsFoundListener mOnQcViewsFoundListener;
	private View mAnchorView;
	private ImageView mStatusIconView;
	private float mDimValue = -1.0f;
	private boolean mUserSwitchEventRegistered;

	private final CarUserManager.UserLifecycleListener mUserLifecycleListener = event -> {
	if (event.getEventType() == CarUserManager.USER_LIFECYCLE_EVENT_TYPE_SWITCHING) {
	reset();
	}
	};

	private final BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() {
	@Override
	public void onReceive(Context context, Intent intent) {
	String action = intent.getAction();
	boolean isIntentFromSelf =
	intent.getIdentifier() != null && intent.getIdentifier().equals(mIdentifier);

	if (Intent.ACTION_CLOSE_SYSTEM_DIALOGS.equals(action) && !isIntentFromSelf
	&& mPanel != null && mPanel.isShowing()) {
	mPanel.dismiss();
	}
	}
	};

	private final ViewTreeObserver.OnGlobalFocusChangeListener mFocusChangeListener =
	(oldFocus, newFocus) -> {
	if (mPanel != null && oldFocus != null && newFocus instanceof FocusParkingView) {
	// When nudging out of the panel, RotaryService will focus on the
	// FocusParkingView to clear the focus highlight. When this occurs, dismiss the
	// panel.
	mPanel.dismiss();
	}
	};

	public StatusIconPanelController(
	Context context,
	CarServiceProvider carServiceProvider,
	BroadcastDispatcher broadcastDispatcher) {
	mContext = context;
	mIdentifier = Integer.toString(System.identityHashCode(this));

	mIconTag = mContext.getResources().getString(R.string.qc_icon_tag);
	mIconHighlightedColor = mContext.getColor(R.color.status_icon_highlighted_color);
	mIconNotHighlightedColor = mContext.getColor(R.color.status_icon_not_highlighted_color);

	int panelMarginTop = mContext.getResources().getDimensionPixelSize(
	R.dimen.car_status_icon_panel_margin_top);
	int topSystemBarHeight = mContext.getResources().getDimensionPixelSize(
	R.dimen.car_top_system_bar_height);
	// Cancel out the superfluous inset automatically applied to the panel.
	mYOffsetPixel = panelMarginTop - topSystemBarHeight;

	broadcastDispatcher.registerReceiver(mBroadcastReceiver,
	new IntentFilter(Intent.ACTION_CLOSE_SYSTEM_DIALOGS), /* executor= */ null,
	UserHandle.ALL);

	carServiceProvider.addListener(car -> {
	CarUserManager carUserManager = (CarUserManager) car.getCarManager(
	Car.CAR_USER_SERVICE);
	if (!mUserSwitchEventRegistered) {
	carUserManager.addListener(Runnable::run, mUserLifecycleListener);
	mUserSwitchEventRegistered = true;
	}
	});
	}

	/**
	* @return list of {@link SystemUIQCView} in this controller
	*/
	public ArrayList<SystemUIQCView> getQCViews() {
	return mQCViews;
	}

	public void setOnQcViewsFoundListener(OnQcViewsFoundListener onQcViewsFoundListener) {
	mOnQcViewsFoundListener = onQcViewsFoundListener;
	}

	/**
	* A listener that can be used to attach controllers quick control panels using
	* {@link SystemUIQCView#getLocalQCProvider()}
	*/
	public interface OnQcViewsFoundListener {
	/**
	* This method is call up when {@link SystemUIQCView}s are found
	*/
	void qcViewsFound(ArrayList<SystemUIQCView> qcViews);
	}

	/**
	* Attaches a panel to a root view that toggles the panel visibility when clicked.
	*
	* Variant of {@link #attachPanel(View, int, int, int, int, int)} with
	* xOffset={@code 0}, yOffset={@link #mYOffsetPixel} &
	* gravity={@link #DEFAULT_POPUP_WINDOW_ANCHOR_GRAVITY}.
	*/
	public void attachPanel(View view, @LayoutRes int layoutRes, @DimenRes int widthRes) {
	attachPanel(view, layoutRes, widthRes, DEFAULT_POPUP_WINDOW_ANCHOR_GRAVITY);
	}

	/**
	* Attaches a panel to a root view that toggles the panel visibility when clicked.
	*
	* Variant of {@link #attachPanel(View, int, int, int, int, int)} with
	* xOffset={@code 0} & yOffset={@link #mYOffsetPixel}.
	*/
	public void attachPanel(View view, @LayoutRes int layoutRes, @DimenRes int widthRes,
	int gravity) {
	attachPanel(view, layoutRes, widthRes, /* xOffset= */ 0, mYOffsetPixel,
	gravity);
	}

	/**
	* Attaches a panel to a root view that toggles the panel visibility when clicked.
	*
	* Variant of {@link #attachPanel(View, int, int, int, int, int)} with
	* gravity={@link #DEFAULT_POPUP_WINDOW_ANCHOR_GRAVITY}.
	*/
	public void attachPanel(View view, @LayoutRes int layoutRes, @DimenRes int widthRes,
	int xOffset, int yOffset) {
	attachPanel(view, layoutRes, widthRes, xOffset, yOffset,
	DEFAULT_POPUP_WINDOW_ANCHOR_GRAVITY);
	}

	/**
	* Attaches a panel to a root view that toggles the panel visibility when clicked.
	*/
	public void attachPanel(View view, @LayoutRes int layoutRes, @DimenRes int widthRes,
	int xOffset, int yOffset, int gravity) {
	if (mAnchorView == null) {
	mAnchorView = view;
	}

	mAnchorView.setOnClickListener(v -> {
	if (mPanel == null) {
	mPanel = createPanel(layoutRes, widthRes);
	}

	if (mPanel.isShowing()) {
	mPanel.dismiss();
	return;
	}

	// Dismiss all currently open system dialogs before opening this panel.
	Intent intent = new Intent(Intent.ACTION_CLOSE_SYSTEM_DIALOGS);
	intent.setIdentifier(mIdentifier);
	mContext.sendBroadcastAsUser(intent, UserHandle.CURRENT);

	mQCViews.forEach(qcView -> qcView.listen(true));

	// Clear the focus highlight in this window since a dialog window is about to show.
	// TODO(b/201700195): remove this workaround once the window focus issue is fixed.
	if (view.isFocused()) {
	ViewUtils.hideFocus(view.getRootView());
	}
	registerFocusListener(true);

	// TODO(b/202563671): remove yOffsetPixel when the PopupWindow API is updated.
	mPanel.showAsDropDown(mAnchorView, xOffset, yOffset, gravity);
	mAnchorView.setSelected(true);
	highlightStatusIcon(true);

	dimBehind(mPanel);
	});
	}

	@VisibleForTesting
	protected PopupWindow getPanel() {
	return mPanel;
	}

	@VisibleForTesting
	protected BroadcastReceiver getBroadcastReceiver() {
	return mBroadcastReceiver;
	}

	@VisibleForTesting
	protected String getIdentifier() {
	return mIdentifier;
	}

	@VisibleForTesting
	@ColorInt
	protected int getIconHighlightedColor() {
	return mIconHighlightedColor;
	}

	@VisibleForTesting
	@ColorInt
	protected int getIconNotHighlightedColor() {
	return mIconNotHighlightedColor;
	}

	private PopupWindow createPanel(@LayoutRes int layoutRes, @DimenRes int widthRes) {
	int panelWidth = mContext.getResources().getDimensionPixelSize(widthRes);

	mPanelContent = (ViewGroup) LayoutInflater.from(mContext).inflate(layoutRes, /* root= */
	null);
	findQcViews(mPanelContent);
	if (mOnQcViewsFoundListener != null) {
	mOnQcViewsFoundListener.qcViewsFound(mQCViews);
	}
	PopupWindow panel = new PopupWindow(mPanelContent, panelWidth, WRAP_CONTENT);
	panel.setBackgroundDrawable(
	mContext.getResources().getDrawable(R.drawable.status_icon_panel_bg,
	mContext.getTheme()));
	panel.setWindowLayoutType(TYPE_SYSTEM_DIALOG);
	panel.setFocusable(true);
	panel.setOutsideTouchable(false);
	panel.setOnDismissListener(new PopupWindow.OnDismissListener() {
	@Override
	public void onDismiss() {
	mAnchorView.setSelected(false);
	highlightStatusIcon(false);
	registerFocusListener(false);
	mQCViews.forEach(qcView -> qcView.listen(false));
	}
	});
	addFocusParkingView();

	return panel;
	}

	private void dimBehind(PopupWindow popupWindow) {
	View container = popupWindow.getContentView().getRootView();
	WindowManager wm = mContext.getSystemService(WindowManager.class);

	if (wm == null) return;

	if (mDimValue < 0) {
	mDimValue = mContext.getResources().getFloat(R.dimen.car_status_icon_panel_dim);
	}

	WindowManager.LayoutParams lp = (WindowManager.LayoutParams) container.getLayoutParams();
	lp.flags \|= WindowManager.LayoutParams.FLAG_DIM_BEHIND;
	lp.dimAmount = mDimValue;
	wm.updateViewLayout(container, lp);
	}

	/**
	* Add a FocusParkingView to the panel content to prevent rotary controller rotation wrapping
	* around in the panel - this only should be called once per panel.
	*/
	private void addFocusParkingView() {
	if (mPanelContent != null) {
	FocusParkingView fpv = new FocusParkingView(mContext);
	mPanelContent.addView(fpv);
	}
	}

	private void registerFocusListener(boolean register) {
	if (mPanelContent == null) {
	return;
	}
	if (register) {
	mPanelContent.getViewTreeObserver().addOnGlobalFocusChangeListener(
	mFocusChangeListener);
	} else {
	mPanelContent.getViewTreeObserver().removeOnGlobalFocusChangeListener(
	mFocusChangeListener);
	}
	}

	private void reset() {
	if (mPanel == null) return;

	mPanel.dismiss();
	mPanel = null;
	mPanelContent = null;
	mOnQcViewsFoundListener = null;
	mQCViews.forEach(v -> v.destroy());
	mQCViews.clear();
	}

	private void findQcViews(ViewGroup rootView) {
	for (int i = 0; i < rootView.getChildCount(); i++) {
	View v = rootView.getChildAt(i);
	if (v instanceof SystemUIQCView) {
	mQCViews.add((SystemUIQCView) v);
	} else if (v instanceof ViewGroup) {
	this.findQcViews((ViewGroup) v);
	}
	}
	}

	private void highlightStatusIcon(boolean isHighlighted) {
	if (mStatusIconView == null) {
	mStatusIconView = mAnchorView.findViewWithTag(mIconTag);
	}

	if (mStatusIconView != null) {
	mStatusIconView.setColorFilter(
	isHighlighted ? mIconHighlightedColor : mIconNotHighlightedColor);
	}
	}
	}