23f8d59d02
Having consistent import order will reduce chance of merge conflict between internal and external master Test: rebuild Change-Id: I0b1a170967ddcce7f388603fd521f6ed1eeba30b
98 lines
3.4 KiB
Java
98 lines
3.4 KiB
Java
/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.settings.widget;
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import android.annotation.Nullable;
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import android.content.Context;
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import android.util.AttributeSet;
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import android.view.Gravity;
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import android.view.View;
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import android.widget.LinearLayout;
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import androidx.annotation.VisibleForTesting;
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import com.android.settingslib.R;
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/**
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* An extension of LinearLayout that automatically switches to vertical
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* orientation when it can't fit its child views horizontally.
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*
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* Main logic in this class comes from {@link androidx.appcompat.widget.ButtonBarLayout}.
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* Compared with {@link androidx.appcompat.widget.ButtonBarLayout}, this layout won't reverse
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* children's order and won't update the minimum height
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*/
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public class BottomLabelLayout extends LinearLayout {
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private static final String TAG = "BottomLabelLayout";
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public BottomLabelLayout(Context context,
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@Nullable AttributeSet attrs) {
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super(context, attrs);
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}
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@Override
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protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
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final int widthSize = MeasureSpec.getSize(widthMeasureSpec);
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final boolean isStacked = isStacked();
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boolean needsRemeasure = false;
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// If we're not stacked, make sure the measure spec is AT_MOST rather
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// than EXACTLY. This ensures that we'll still get TOO_SMALL so that we
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// know to stack the buttons.
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final int initialWidthMeasureSpec;
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if (!isStacked && MeasureSpec.getMode(widthMeasureSpec) == MeasureSpec.EXACTLY) {
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initialWidthMeasureSpec = MeasureSpec.makeMeasureSpec(widthSize, MeasureSpec.AT_MOST);
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// We'll need to remeasure again to fill excess space.
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needsRemeasure = true;
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} else {
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initialWidthMeasureSpec = widthMeasureSpec;
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}
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super.onMeasure(initialWidthMeasureSpec, heightMeasureSpec);
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if (!isStacked) {
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final int measuredWidth = getMeasuredWidthAndState();
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final int measuredWidthState = measuredWidth & View.MEASURED_STATE_MASK;
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if (measuredWidthState == View.MEASURED_STATE_TOO_SMALL) {
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setStacked(true);
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// Measure again in the new orientation.
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needsRemeasure = true;
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}
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}
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if (needsRemeasure) {
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super.onMeasure(widthMeasureSpec, heightMeasureSpec);
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}
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}
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@VisibleForTesting
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void setStacked(boolean stacked) {
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setOrientation(stacked ? LinearLayout.VERTICAL : LinearLayout.HORIZONTAL);
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setGravity(stacked ? Gravity.START : Gravity.BOTTOM);
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final View spacer = findViewById(R.id.spacer);
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if (spacer != null) {
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spacer.setVisibility(stacked ? View.GONE : View.VISIBLE);
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}
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}
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private boolean isStacked() {
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return getOrientation() == LinearLayout.VERTICAL;
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}
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}
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