| /* |
| * Copyright (C) 2023 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.accessibility.accessibilitymenu.view; |
| |
| import android.graphics.Rect; |
| import android.view.TouchDelegate; |
| import android.view.View; |
| import android.view.View.OnClickListener; |
| import android.view.ViewGroup; |
| import android.view.ViewTreeObserver.OnGlobalLayoutListener; |
| import android.widget.ImageButton; |
| |
| import androidx.annotation.Nullable; |
| |
| import com.android.systemui.accessibility.accessibilitymenu.R; |
| |
| /** |
| * This class is for Accessibility menu footer layout. Handles switching between a11y menu pages. |
| */ |
| public class A11yMenuFooter { |
| |
| /** Provides an interface for footer of a11yMenu. */ |
| public interface A11yMenuFooterCallBack { |
| |
| /** Calls back when user clicks the left button. */ |
| void onLeftButtonClicked(); |
| |
| /** Calls back when user clicks the right button. */ |
| void onRightButtonClicked(); |
| } |
| |
| private final FooterButtonClickListener mFooterButtonClickListener; |
| |
| private ImageButton mPreviousPageBtn; |
| private ImageButton mNextPageBtn; |
| private View mTopListDivider; |
| private View mBottomListDivider; |
| private final A11yMenuFooterCallBack mCallBack; |
| |
| public A11yMenuFooter(ViewGroup menuLayout, A11yMenuFooterCallBack callBack) { |
| this.mCallBack = callBack; |
| mFooterButtonClickListener = new FooterButtonClickListener(); |
| configureFooterLayout(menuLayout); |
| } |
| |
| public @Nullable ImageButton getPreviousPageBtn() { |
| return mPreviousPageBtn; |
| } |
| |
| public @Nullable ImageButton getNextPageBtn() { |
| return mNextPageBtn; |
| } |
| |
| private void configureFooterLayout(ViewGroup menuLayout) { |
| ViewGroup footerContainer = menuLayout.findViewById(R.id.footerlayout); |
| footerContainer.setVisibility(View.VISIBLE); |
| |
| mPreviousPageBtn = menuLayout.findViewById(R.id.menu_prev_button); |
| mNextPageBtn = menuLayout.findViewById(R.id.menu_next_button); |
| mTopListDivider = menuLayout.findViewById(R.id.top_listDivider); |
| mBottomListDivider = menuLayout.findViewById(R.id.bottom_listDivider); |
| |
| // Registers listeners for footer buttons. |
| setListener(mPreviousPageBtn); |
| setListener(mNextPageBtn); |
| |
| menuLayout |
| .getViewTreeObserver() |
| .addOnGlobalLayoutListener( |
| new OnGlobalLayoutListener() { |
| @Override |
| public void onGlobalLayout() { |
| menuLayout.getViewTreeObserver().removeOnGlobalLayoutListener(this); |
| expandBtnTouchArea(mPreviousPageBtn, menuLayout); |
| expandBtnTouchArea(mNextPageBtn, (View) mNextPageBtn.getParent()); |
| } |
| }); |
| } |
| |
| private void expandBtnTouchArea(ImageButton btn, View btnParent) { |
| Rect btnRect = new Rect(); |
| btn.getHitRect(btnRect); |
| btnRect.top -= getHitRectHeight(mTopListDivider); |
| btnRect.bottom += getHitRectHeight(mBottomListDivider); |
| btnParent.setTouchDelegate(new TouchDelegate(btnRect, btn)); |
| } |
| |
| private static int getHitRectHeight(View listDivider) { |
| Rect hitRect = new Rect(); |
| listDivider.getHitRect(hitRect); |
| return hitRect.height(); |
| } |
| |
| private void setListener(@Nullable View view) { |
| if (view != null) { |
| view.setOnClickListener(mFooterButtonClickListener); |
| } |
| } |
| |
| /** Handles click event for footer buttons. */ |
| private class FooterButtonClickListener implements OnClickListener { |
| @Override |
| public void onClick(View view) { |
| if (view.getId() == R.id.menu_prev_button) { |
| mCallBack.onLeftButtonClicked(); |
| } else if (view.getId() == R.id.menu_next_button) { |
| mCallBack.onRightButtonClicked(); |
| } |
| } |
| } |
| } |