mirror of https://github.com/NekoX-Dev/NekoX.git
90 lines
2.9 KiB
Java
90 lines
2.9 KiB
Java
/*
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* Copyright 2018 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 androidx.recyclerview.widget;
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import android.graphics.Canvas;
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import android.os.Build;
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import android.view.View;
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import androidx.core.view.ViewCompat;
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/**
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* Package private class to keep implementations. Putting them inside ItemTouchUIUtil makes them
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* public API, which is not desired in this case.
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*/
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class ItemTouchUIUtilImpl implements ItemTouchUIUtil {
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static final ItemTouchUIUtil INSTANCE = new ItemTouchUIUtilImpl();
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@Override
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public void onDraw(Canvas c, RecyclerView recyclerView, View view, float dX, float dY,
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int actionState, boolean isCurrentlyActive) {
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if (Build.VERSION.SDK_INT >= 21) {
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if (isCurrentlyActive) {
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Object originalElevation = view.getTag();
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if (originalElevation == null) {
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originalElevation = ViewCompat.getElevation(view);
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float newElevation = 1f + findMaxElevation(recyclerView, view);
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ViewCompat.setElevation(view, newElevation);
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view.setTag(originalElevation);
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}
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}
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}
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view.setTranslationX(dX);
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view.setTranslationY(dY);
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}
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private static float findMaxElevation(RecyclerView recyclerView, View itemView) {
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final int childCount = recyclerView.getChildCount();
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float max = 0;
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for (int i = 0; i < childCount; i++) {
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final View child = recyclerView.getChildAt(i);
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if (child == itemView) {
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continue;
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}
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final float elevation = ViewCompat.getElevation(child);
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if (elevation > max) {
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max = elevation;
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}
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}
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return max;
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}
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@Override
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public void onDrawOver(Canvas c, RecyclerView recyclerView, View view, float dX, float dY,
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int actionState, boolean isCurrentlyActive) {
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}
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@Override
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public void clearView(View view) {
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if (Build.VERSION.SDK_INT >= 21) {
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final Object tag = view.getTag();
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if (tag instanceof Float) {
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ViewCompat.setElevation(view, (Float) tag);
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}
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view.setTag(null);
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}
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view.setTranslationX(0f);
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view.setTranslationY(0f);
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}
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@Override
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public void onSelected(View view) {
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}
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}
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