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