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/*
* Copyright (C) 2014 The CyanogenMod 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 android.support.v4.view;
import android.content.Context;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewConfiguration;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
public class ThemeViewPager extends ViewPager {
private boolean mExpanded;
private boolean mIsDragging = false;
private float mSlop;
private float mLastX;
private float mLastY;
public ThemeViewPager(Context context, AttributeSet attrs) {
super(context, attrs);
initView(context);
}
private void initView(Context context) {
mSlop = ViewConfiguration.get(context).getScaledTouchSlop();
}
public void setExpanded(boolean expanded) {
mExpanded = expanded;
}
@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
return !mExpanded;
}
@Override
public boolean onTouchEvent(MotionEvent ev) {
switch (ev.getAction()) {
case MotionEvent.ACTION_DOWN:
mLastX = ev.getX();
mLastY = ev.getY();
break;
case MotionEvent.ACTION_MOVE:
float xDist = Math.abs(mLastX - ev.getX());
float yDist = Math.abs(mLastY - ev.getY());
if (xDist > mSlop || yDist > mSlop) {
mIsDragging = true;
}
break;
case MotionEvent.ACTION_CANCEL:
mIsDragging = false;
break;
case MotionEvent.ACTION_UP:
if (!mIsDragging) {
performClick();
}
mIsDragging = false;
break;
}
if (mExpanded) {
return false;
}
return super.onTouchEvent(ev);
}
/**
* This method will return the view associated with a given position. This is neccessary
* because the index value in 'getChildAt(index)' does not neccessarily associate with
* the viewpager's position.
*
*/
public View getViewForPosition(int position) {
View view = null;
for(int i=0; i < getChildCount(); i++) {
View v = getChildAt(i);
ItemInfo info = infoForChild(v);
if (position == info.position) {
view = v;
break;
}
}
return view;
}
}
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