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/*
* 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.internal.app;
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);
}
}
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