| /* |
| * Copyright (C) 2018 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.wallpaper.picker; |
| |
| import android.os.Bundle; |
| import android.text.TextUtils; |
| import android.view.MenuItem; |
| import android.view.View; |
| import android.widget.TextView; |
| |
| import androidx.annotation.MenuRes; |
| import androidx.appcompat.widget.Toolbar; |
| import androidx.appcompat.widget.Toolbar.OnMenuItemClickListener; |
| import androidx.fragment.app.Fragment; |
| |
| import com.android.wallpaper.R; |
| |
| /** |
| * Base class for Fragments that own a {@link Toolbar} widget. |
| * A Fragment extending this class is expected to have a {@link Toolbar} in its root view, with id |
| * {@link R.id#toolbar}, which can optionally have a TextView with id custom_toolbar_title for |
| * the title. |
| * If the Bundle returned by {@link #createArguments(CharSequence)} is used as Arguments for this |
| * Fragment, the title provided to that method will be used as the Fragment's toolbar title, |
| * otherwise, the value returned by {@link #getDefaultTitle()} (default being {@code null}) will be |
| * used as title. |
| * |
| * @see #setArguments(Bundle) |
| */ |
| public abstract class ToolbarFragment extends Fragment implements OnMenuItemClickListener { |
| |
| private static final String ARG_TITLE = "ToolbarFragment.title"; |
| |
| /** |
| * Returns a newly created {@link Bundle} containing the given title as an argument. |
| * If set as a ToolbarFragment's arguments bundle, this will be used to set up the title of |
| * the Toolbar in {@link #setUpToolbar(View)} |
| */ |
| protected static Bundle createArguments(CharSequence title) { |
| Bundle args = new Bundle(); |
| args.putCharSequence(ARG_TITLE, title); |
| return args; |
| } |
| |
| protected Toolbar mToolbar; |
| private TextView mTitleView; |
| |
| /** |
| * Configures a toolbar in the given rootView, with id {@code toolbar} and sets its title to |
| * the value in Arguments or {@link #getDefaultTitle()} |
| */ |
| public void setUpToolbar(View rootView) { |
| mToolbar = rootView.findViewById(R.id.toolbar); |
| |
| mTitleView = mToolbar.findViewById(R.id.custom_toolbar_title); |
| CharSequence title; |
| if (getArguments() != null) { |
| title = getArguments().getCharSequence(ARG_TITLE, getDefaultTitle()); |
| } else { |
| title = getDefaultTitle(); |
| } |
| if (!TextUtils.isEmpty(title)) { |
| setTitle(title); |
| } |
| } |
| |
| /** |
| * Configures a toolbar in the given rootView, inflating the menu corresponding to the given id |
| * for the toolbar menu. |
| * Override {@link #onMenuItemClick(MenuItem)} to listen to item click events. |
| * @see #setUpToolbar(View) |
| */ |
| public void setUpToolbar(View rootView, @MenuRes int menuResId) { |
| setUpToolbar(rootView); |
| mToolbar.inflateMenu(menuResId); |
| mToolbar.setOnMenuItemClickListener(this); |
| } |
| |
| /** |
| * Provides a title for this Fragment's toolbar to be used if none is found in |
| * {@link #getArguments()}. |
| * Default implementation returns {@code null}. |
| */ |
| public CharSequence getDefaultTitle() { |
| return null; |
| } |
| |
| private void setTitle(CharSequence title) { |
| if (mToolbar == null) { |
| return; |
| } |
| if (mTitleView != null) { |
| mToolbar.setTitle(null); |
| mTitleView.setText(title); |
| } else { |
| mToolbar.setTitle(title); |
| } |
| } |
| |
| @Override |
| public boolean onMenuItemClick(MenuItem item) { |
| return false; |
| } |
| } |