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/*
* Copyright (C) 2013 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.camera.ui;
import android.content.Context;
import android.content.res.Configuration;
import android.util.AttributeSet;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.LinearLayout;
import java.util.ArrayList;
import java.util.List;
/**
* TopRightWeightedLayout is a LinearLayout that reorders its
* children such that the right most child is the top most child
* on an orientation change.
*/
public class TopRightWeightedLayout extends LinearLayout {
public TopRightWeightedLayout(Context context, AttributeSet attrs) {
super(context, attrs);
}
@Override
public void onFinishInflate() {
Configuration configuration = getContext().getResources().getConfiguration();
checkOrientation(configuration.orientation);
}
@Override
public void onConfigurationChanged(Configuration configuration) {
super.onConfigurationChanged(configuration);
checkOrientation(configuration.orientation);
}
/**
* Set the orientation of this layout if it has changed,
* and center the elements based on the new orientation.
*/
private void checkOrientation(int orientation) {
final boolean isHorizontal = LinearLayout.HORIZONTAL == getOrientation();
final boolean isPortrait = Configuration.ORIENTATION_PORTRAIT == orientation;
if (isPortrait && !isHorizontal) {
// Portrait orientation is out of sync, setting to horizontal
// and reversing children
setOrientation(LinearLayout.HORIZONTAL);
reverseChildren();
requestLayout();
} else if (!isPortrait && isHorizontal) {
// Landscape orientation is out of sync, setting to vertical
// and reversing children
setOrientation(LinearLayout.VERTICAL);
reverseChildren();
requestLayout();
}
}
/**
* Reverse the ordering of the children in this layout.
* Note: bringChildToFront produced a non-deterministic ordering.
*/
private void reverseChildren() {
List<View> children = new ArrayList<View>();
for (int i = getChildCount() - 1; i >= 0; i--) {
children.add(getChildAt(i));
}
for (View v : children) {
bringChildToFront(v);
}
}
}
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