material-components_material-components-android/lib/java/com/google/android/material/internal/NavigationMenu.java

/*
 * Copyright (C) 2015 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.google.android.material.internal;

import static androidx.annotation.RestrictTo.Scope.LIBRARY_GROUP;

import android.content.Context;
import androidx.appcompat.view.menu.MenuBuilder;
import androidx.appcompat.view.menu.MenuItemImpl;
import androidx.appcompat.view.menu.SubMenuBuilder;
import android.view.SubMenu;
import androidx.annotation.NonNull;
import androidx.annotation.RestrictTo;

/**
 * This is a {@link MenuBuilder} that returns an instance of {@link NavigationSubMenu} instead of
 * {@link SubMenuBuilder} when a sub menu is created.
 *
 * @hide
 */
@RestrictTo(LIBRARY_GROUP)
public class NavigationMenu extends MenuBuilder {

  public NavigationMenu(Context context) {
    super(context);
  }

  @NonNull
  @Override
  public SubMenu addSubMenu(int group, int id, int categoryOrder, CharSequence title) {
    final MenuItemImpl item = (MenuItemImpl) addInternal(group, id, categoryOrder, title);
    final SubMenuBuilder subMenu = new NavigationSubMenu(getContext(), this, item);
    item.setSubMenu(subMenu);
    return subMenu;
  }
}