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/*
* Copyright (C) 2016 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.deskclock;
import android.content.Context;
import androidx.annotation.Nullable;
import androidx.recyclerview.widget.RecyclerView;
import android.util.AttributeSet;
import android.view.MotionEvent;
/**
* Thin wrapper around RecyclerView to prevent simultaneous layout passes, particularly during
* animations.
*/
public class AlarmRecyclerView extends RecyclerView {
private boolean mIgnoreRequestLayout;
public AlarmRecyclerView(Context context) {
this(context, null);
}
public AlarmRecyclerView(Context context, @Nullable AttributeSet attrs) {
this(context, attrs, 0);
}
public AlarmRecyclerView(Context context, @Nullable AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
addOnItemTouchListener(new RecyclerView.SimpleOnItemTouchListener() {
@Override
public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) {
// Disable scrolling/user action to prevent choppy animations.
return rv.getItemAnimator().isRunning();
}
});
}
@Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
mIgnoreRequestLayout = true;
super.onLayout(changed, left, top, right, bottom);
mIgnoreRequestLayout = false;
}
@Override
public void requestLayout() {
if (!mIgnoreRequestLayout &&
(getItemAnimator() == null || !getItemAnimator().isRunning())) {
super.requestLayout();
}
}
}
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