com/android/systemui/globalactions/MinHeightScrollView.java

/*
 * Copyright (C) 2020 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.systemui.globalactions;

import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.widget.ScrollView;

/**
 * When measured, this view sets the minimum height of its first child to be equal to its own
 * target height.
 *
 * This ensures fall-through click handlers can be placed on this view's child component.
 */
public class MinHeightScrollView extends ScrollView {
    public MinHeightScrollView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    @Override
    public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        View firstChild = getChildAt(0);
        if (firstChild != null) {
            firstChild.setMinimumHeight(MeasureSpec.getSize(heightMeasureSpec));
        }
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    }
}