xref: /frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/ReverseLinearLayout.java

/*
 * 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.systemui.statusbar.phone;

import android.annotation.Nullable;
import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;
import android.widget.LinearLayout;

/**
 * Automatically reverses the order of children as they are added.
 * Also reverse the width and height values of layout params
 */
public class ReverseLinearLayout extends LinearLayout {

    public ReverseLinearLayout(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
    }

    @Override
    public void addView(View child) {
        reversParams(child.getLayoutParams());
        super.addView(child, 0);
    }

    @Override
    public void addView(View child, ViewGroup.LayoutParams params) {
        reversParams(params);
        super.addView(child, 0, params);
    }

    private void reversParams(ViewGroup.LayoutParams params) {
        if (params == null) {
            return;
        }
        int width = params.width;
        params.width = params.height;
        params.height = width;
    }

}