| /* |
| * 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.content.res.Configuration; |
| import android.util.AttributeSet; |
| import android.view.View; |
| import android.view.ViewGroup; |
| import android.widget.LinearLayout; |
| |
| import java.util.ArrayList; |
| |
| /** |
| * 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 { |
| |
| /** If true, the layout is reversed vs. a regular linear layout */ |
| private boolean mIsLayoutReverse; |
| |
| /** If true, the layout is opposite to it's natural reversity from the layout direction */ |
| private boolean mIsAlternativeOrder; |
| |
| public ReverseLinearLayout(Context context, @Nullable AttributeSet attrs) { |
| super(context, attrs); |
| } |
| |
| @Override |
| protected void onFinishInflate() { |
| super.onFinishInflate(); |
| updateOrder(); |
| } |
| |
| @Override |
| public void addView(View child) { |
| reversParams(child.getLayoutParams()); |
| if (mIsLayoutReverse) { |
| super.addView(child, 0); |
| } else { |
| super.addView(child); |
| } |
| } |
| |
| @Override |
| public void addView(View child, ViewGroup.LayoutParams params) { |
| reversParams(params); |
| if (mIsLayoutReverse) { |
| super.addView(child, 0, params); |
| } else { |
| super.addView(child, params); |
| } |
| } |
| |
| @Override |
| public void onRtlPropertiesChanged(int layoutDirection) { |
| super.onRtlPropertiesChanged(layoutDirection); |
| updateOrder(); |
| } |
| |
| public void setAlternativeOrder(boolean alternative) { |
| mIsAlternativeOrder = alternative; |
| updateOrder(); |
| } |
| |
| /** |
| * In landscape, the LinearLayout is not auto mirrored since it is vertical. Therefore we |
| * have to do it manually |
| */ |
| private void updateOrder() { |
| boolean isLayoutRtl = getLayoutDirection() == LAYOUT_DIRECTION_RTL; |
| boolean isLayoutReverse = isLayoutRtl ^ mIsAlternativeOrder; |
| |
| if (mIsLayoutReverse != isLayoutReverse) { |
| // reversity changed, swap the order of all views. |
| int childCount = getChildCount(); |
| ArrayList<View> childList = new ArrayList<>(childCount); |
| for (int i = 0; i < childCount; i++) { |
| childList.add(getChildAt(i)); |
| } |
| removeAllViews(); |
| for (int i = childCount - 1; i >= 0; i--) { |
| super.addView(childList.get(i)); |
| } |
| mIsLayoutReverse = isLayoutReverse; |
| } |
| } |
| |
| private void reversParams(ViewGroup.LayoutParams params) { |
| if (params == null) { |
| return; |
| } |
| int width = params.width; |
| params.width = params.height; |
| params.height = width; |
| } |
| |
| } |