82 lines
2.8 KiB
Java
82 lines
2.8 KiB
Java
/*
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* Copyright (C) 2020 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.app;
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import android.content.Context;
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import android.util.AttributeSet;
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import com.android.internal.widget.GridLayoutManager;
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import com.android.internal.widget.RecyclerView;
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/**
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* For a11y and per {@link RecyclerView#onInitializeAccessibilityNodeInfo}, override
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* methods to ensure proper row counts.
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*/
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public class ChooserGridLayoutManager extends GridLayoutManager {
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private boolean mVerticalScrollEnabled = true;
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/**
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* Constructor used when layout manager is set in XML by RecyclerView attribute
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* "layoutManager". If spanCount is not specified in the XML, it defaults to a
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* single column.
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*
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*/
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public ChooserGridLayoutManager(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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}
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/**
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* Creates a vertical GridLayoutManager
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*
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* @param context Current context, will be used to access resources.
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* @param spanCount The number of columns in the grid
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*/
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public ChooserGridLayoutManager(Context context, int spanCount) {
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super(context, spanCount);
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}
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/**
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* @param context Current context, will be used to access resources.
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* @param spanCount The number of columns or rows in the grid
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* @param orientation Layout orientation. Should be {@link #HORIZONTAL} or {@link
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* #VERTICAL}.
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* @param reverseLayout When set to true, layouts from end to start.
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*/
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public ChooserGridLayoutManager(Context context, int spanCount, int orientation,
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boolean reverseLayout) {
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super(context, spanCount, orientation, reverseLayout);
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}
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@Override
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public int getRowCountForAccessibility(RecyclerView.Recycler recycler,
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RecyclerView.State state) {
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// Do not count the footer view in the official count
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return super.getRowCountForAccessibility(recycler, state) - 1;
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}
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void setVerticalScrollEnabled(boolean verticalScrollEnabled) {
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mVerticalScrollEnabled = verticalScrollEnabled;
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}
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@Override
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public boolean canScrollVertically() {
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return mVerticalScrollEnabled && super.canScrollVertically();
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}
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}
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