/*
|
* Copyright (C) 2017 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.settings.widget;
|
|
import android.annotation.Nullable;
|
import android.content.Context;
|
import android.util.AttributeSet;
|
import android.view.Gravity;
|
import android.view.View;
|
import android.widget.LinearLayout;
|
|
import androidx.annotation.VisibleForTesting;
|
|
import com.android.settingslib.R;
|
|
/**
|
* An extension of LinearLayout that automatically switches to vertical
|
* orientation when it can't fit its child views horizontally.
|
*
|
* Main logic in this class comes from {@link androidx.appcompat.widget.ButtonBarLayout}.
|
* Compared with {@link androidx.appcompat.widget.ButtonBarLayout}, this layout won't reverse
|
* children's order and won't update the minimum height
|
*/
|
public class BottomLabelLayout extends LinearLayout {
|
private static final String TAG = "BottomLabelLayout";
|
|
public BottomLabelLayout(Context context,
|
@Nullable AttributeSet attrs) {
|
super(context, attrs);
|
}
|
|
@Override
|
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
|
final int widthSize = MeasureSpec.getSize(widthMeasureSpec);
|
final boolean isStacked = isStacked();
|
boolean needsRemeasure = false;
|
|
// If we're not stacked, make sure the measure spec is AT_MOST rather
|
// than EXACTLY. This ensures that we'll still get TOO_SMALL so that we
|
// know to stack the buttons.
|
final int initialWidthMeasureSpec;
|
if (!isStacked && MeasureSpec.getMode(widthMeasureSpec) == MeasureSpec.EXACTLY) {
|
initialWidthMeasureSpec = MeasureSpec.makeMeasureSpec(widthSize, MeasureSpec.AT_MOST);
|
|
// We'll need to remeasure again to fill excess space.
|
needsRemeasure = true;
|
} else {
|
initialWidthMeasureSpec = widthMeasureSpec;
|
}
|
|
super.onMeasure(initialWidthMeasureSpec, heightMeasureSpec);
|
if (!isStacked) {
|
final int measuredWidth = getMeasuredWidthAndState();
|
final int measuredWidthState = measuredWidth & View.MEASURED_STATE_MASK;
|
|
if (measuredWidthState == View.MEASURED_STATE_TOO_SMALL) {
|
setStacked(true);
|
// Measure again in the new orientation.
|
needsRemeasure = true;
|
}
|
}
|
|
if (needsRemeasure) {
|
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
|
}
|
|
}
|
|
@VisibleForTesting
|
void setStacked(boolean stacked) {
|
setOrientation(stacked ? LinearLayout.VERTICAL : LinearLayout.HORIZONTAL);
|
setGravity(stacked ? Gravity.START : Gravity.BOTTOM);
|
|
final View spacer = findViewById(R.id.spacer);
|
if (spacer != null) {
|
spacer.setVisibility(stacked ? View.GONE : View.VISIBLE);
|
}
|
}
|
|
private boolean isStacked() {
|
return getOrientation() == LinearLayout.VERTICAL;
|
}
|
}
|
