87 lines
2.7 KiB
Java
87 lines
2.7 KiB
Java
/*
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* Copyright (C) 2022 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.internal.widget;
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import android.content.Context;
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import android.util.AttributeSet;
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import android.view.View;
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import android.view.ViewGroup;
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import android.widget.ScrollView;
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/** ScrollView that includes scaling and fading animations */
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public class FadingWearableScrollView extends ScrollView {
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private ViewGroupFader mFader;
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public FadingWearableScrollView(Context context) {
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this(context, null);
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}
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public FadingWearableScrollView(Context context, AttributeSet attrs) {
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this(context, attrs, com.android.internal.R.attr.scrollViewStyle);
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}
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public FadingWearableScrollView(Context context, AttributeSet attrs, int defStyleAttr) {
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this(context, attrs, defStyleAttr, 0);
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}
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public FadingWearableScrollView(Context context, AttributeSet attrs, int defStyleAttr,
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int defStyleRes) {
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super(context, attrs, defStyleAttr, defStyleRes);
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init();
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}
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private void init() {
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mFader = createFader(this);
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}
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/**
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* Creates a simple ViewGroupFader that animates views from both top and bottom.
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*/
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private ViewGroupFader createFader(ViewGroup container) {
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return new ViewGroupFader(
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container,
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new ViewGroupFader.AnimationCallback() {
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@Override
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public boolean shouldFadeFromTop(View view) {
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return true;
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}
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@Override
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public boolean shouldFadeFromBottom(View view) {
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return true;
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}
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@Override
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public void viewHasBecomeFullSize(View view) {
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}
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},
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new ViewGroupFader.GlobalVisibleViewBoundsProvider());
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}
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@Override
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protected void onLayout(boolean changed, int l, int t, int r, int b) {
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super.onLayout(changed, l, t, r, b);
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mFader.updateFade();
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}
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@Override
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protected void onScrollChanged(int l, int t, int oldl, int oldt) {
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super.onScrollChanged(l, t, oldl, oldt);
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mFader.updateFade();
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}
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}
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