90 lines
3.1 KiB
Java
90 lines
3.1 KiB
Java
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/*
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* Copyright (C) 2019 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.app;
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import android.content.Context;
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import android.util.AttributeSet;
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import android.view.MotionEvent;
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import android.view.View;
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import com.android.internal.widget.ViewPager;
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/**
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* A {@link ViewPager} which wraps around its tallest child's height.
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* <p>Normally {@link ViewPager} instances expand their height to cover all remaining space in
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* the layout.
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* <p>This class is used for the intent resolver and share sheet's tabbed view.
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*/
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public class ResolverViewPager extends ViewPager {
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private boolean mSwipingEnabled = true;
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public ResolverViewPager(Context context) {
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super(context);
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}
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public ResolverViewPager(Context context, AttributeSet attrs) {
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super(context, attrs);
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}
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public ResolverViewPager(Context context, AttributeSet attrs, int defStyleAttr) {
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super(context, attrs, defStyleAttr);
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}
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public ResolverViewPager(Context context, AttributeSet attrs,
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int defStyleAttr, 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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super.onMeasure(widthMeasureSpec, heightMeasureSpec);
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if (MeasureSpec.getMode(heightMeasureSpec) != MeasureSpec.AT_MOST) {
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return;
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}
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widthMeasureSpec = MeasureSpec.makeMeasureSpec(getMeasuredWidth(), MeasureSpec.EXACTLY);
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int height = getMeasuredHeight();
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int maxHeight = 0;
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for (int i = 0; i < getChildCount(); i++) {
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View child = getChildAt(i);
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child.measure(widthMeasureSpec,
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MeasureSpec.makeMeasureSpec(height, MeasureSpec.AT_MOST));
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if (maxHeight < child.getMeasuredHeight()) {
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maxHeight = child.getMeasuredHeight();
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}
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}
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if (maxHeight > 0) {
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height = maxHeight;
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}
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heightMeasureSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY);
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super.onMeasure(widthMeasureSpec, heightMeasureSpec);
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}
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/**
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* Sets whether swiping sideways should happen.
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* <p>Note that swiping is always disabled for RTL layouts (b/159110029 for context).
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*/
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void setSwipingEnabled(boolean swipingEnabled) {
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mSwipingEnabled = swipingEnabled;
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}
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@Override
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public boolean onInterceptTouchEvent(MotionEvent ev) {
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return !isLayoutRtl() && mSwipingEnabled && super.onInterceptTouchEvent(ev);
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}
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}
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