71 lines
2.3 KiB
Java
71 lines
2.3 KiB
Java
/*
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* Copyright (C) 2021 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.internal.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.View;
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import android.widget.FrameLayout;
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import android.widget.RemoteViews;
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/**
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* This view will measure itself as having 0 size if all of its children are {@link #GONE}.
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* Otherwise it acts like a normal {@link FrameLayout}.
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*/
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@RemoteViews.RemoteView
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public class NotificationVanishingFrameLayout extends FrameLayout {
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public NotificationVanishingFrameLayout(Context context) {
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this(context, null, 0, 0);
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}
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public NotificationVanishingFrameLayout(Context context, @Nullable AttributeSet attrs) {
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this(context, attrs, 0, 0);
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}
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public NotificationVanishingFrameLayout(Context context, @Nullable AttributeSet attrs,
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int defStyleAttr) {
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this(context, attrs, defStyleAttr, 0);
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}
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public NotificationVanishingFrameLayout(Context context, AttributeSet attrs, int defStyleAttr,
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int defStyleRes) {
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super(context, attrs, defStyleAttr, defStyleRes);
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}
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@Override
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protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
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if (allChildrenGone()) {
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int zeroSpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.EXACTLY);
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super.onMeasure(zeroSpec, zeroSpec);
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} else {
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super.onMeasure(widthMeasureSpec, heightMeasureSpec);
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}
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}
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private boolean allChildrenGone() {
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final int childCount = getChildCount();
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for (int i = 0; i < childCount; i++) {
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final View child = getChildAt(i);
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if (child != null && child.getVisibility() != GONE) {
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return false;
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}
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}
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return true;
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}
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}
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