com.ratebeer.android.app.location.TouchableMapViewPager.java Source code

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Here is the source code for com.ratebeer.android.app.location.TouchableMapViewPager.java

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/*
This file is part of RateBeer For Android.
    
RateBeer for Android is free software: you can redistribute it 
and/or modify it under the terms of the GNU General Public 
License as published by the Free Software Foundation, either 
version 3 of the License, or (at your option) any later version.
    
RateBeer for Android is distributed in the hope that it will be 
useful, but WITHOUT ANY WARRANTY; without even the implied warranty 
of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
    
You should have received a copy of the GNU General Public License
along with RateBeer for Android.  If not, see 
<http://www.gnu.org/licenses/>.
 */
package com.ratebeer.android.app.location;

import android.content.Context;
import android.graphics.Rect;
import android.support.v4.view.ViewPager;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;

import com.ratebeer.android.R;

/**
 * A custom ViewPager that allows touching of MapView elements. Loosely based on 
 * http://stackoverflow.com/a/7258579/243165 Will make sure that the ViewPager does
 * not handle any touch events that happen within a FrameLayout with R.id.map
 * @author erickok
 */
public class TouchableMapViewPager extends ViewPager {

    private int activePage = 0;

    public TouchableMapViewPager(Context context, AttributeSet attrs) {
        super(context, attrs);
        setOnPageChangeListener(pageChangeListener);
    }

    @Override
    public boolean onInterceptTouchEvent(MotionEvent ev) {
        View map = findViewById(R.id.map_nearby);
        if (map != null) {
            Rect rect = new Rect();
            map.getHitRect(rect);
            int pageOffset = getMeasuredWidth() * activePage;
            if (rect.contains(pageOffset + (int) ev.getX(), (int) ev.getY())) {
                return false;
            }
        }
        return super.onInterceptTouchEvent(ev);
    }

    private OnPageChangeListener pageChangeListener = new OnPageChangeListener() {

        @Override
        public void onPageSelected(int position) {
            activePage = position;
        }

        @Override
        public void onPageScrollStateChanged(int state) {
        }

        @Override
        public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels2) {
            activePage = position;
        }

    };

    public OnPageChangeListener getOnPageChangeListener() {
        return pageChangeListener;
    }

}