4860e4ee48
Test: make setup-wizard-lib Bug: 76692459 Change-Id: I40171e973d442b1a1815e9e7d7c2cc984cb38bac
82 lines
2.5 KiB
Java
82 lines
2.5 KiB
Java
/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.setupwizardlib.template;
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import android.util.Log;
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import android.widget.ScrollView;
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import androidx.annotation.NonNull;
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import androidx.annotation.Nullable;
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import com.android.setupwizardlib.template.RequireScrollMixin.ScrollHandlingDelegate;
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import com.android.setupwizardlib.view.BottomScrollView;
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import com.android.setupwizardlib.view.BottomScrollView.BottomScrollListener;
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/**
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* {@link ScrollHandlingDelegate} which analyzes scroll events from {@link BottomScrollView} and
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* notifies {@link RequireScrollMixin} about scrollability changes.
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*/
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public class ScrollViewScrollHandlingDelegate
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implements ScrollHandlingDelegate, BottomScrollListener {
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private static final String TAG = "ScrollViewDelegate";
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@NonNull
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private final RequireScrollMixin mRequireScrollMixin;
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@Nullable
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private final BottomScrollView mScrollView;
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public ScrollViewScrollHandlingDelegate(
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@NonNull RequireScrollMixin requireScrollMixin,
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@Nullable ScrollView scrollView) {
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mRequireScrollMixin = requireScrollMixin;
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if (scrollView instanceof BottomScrollView) {
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mScrollView = (BottomScrollView) scrollView;
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} else {
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Log.w(TAG, "Cannot set non-BottomScrollView. Found=" + scrollView);
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mScrollView = null;
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}
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}
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@Override
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public void onScrolledToBottom() {
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mRequireScrollMixin.notifyScrollabilityChange(false);
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}
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@Override
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public void onRequiresScroll() {
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mRequireScrollMixin.notifyScrollabilityChange(true);
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}
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@Override
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public void startListening() {
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if (mScrollView != null) {
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mScrollView.setBottomScrollListener(this);
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} else {
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Log.w(TAG, "Cannot require scroll. Scroll view is null.");
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}
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}
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@Override
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public void pageScrollDown() {
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if (mScrollView != null) {
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mScrollView.pageScroll(ScrollView.FOCUS_DOWN);
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}
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}
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}
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