src/org/sflphone/fragments/HomeFragment.java

/*
 *  Copyright (C) 2004-2014 Savoir-Faire Linux Inc.
 *
 *  Author: Alexandre Lision <alexandre.lision@savoirfairelinux.com>
 *
 *  This program 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.
 *
 *  This program 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 this program; if not, write to the Free Software
 *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 *  Additional permission under GNU GPL version 3 section 7:
 *
 *  If you modify this program, or any covered work, by linking or
 *  combining it with the OpenSSL project's OpenSSL library (or a
 *  modified version of that library), containing parts covered by the
 *  terms of the OpenSSL or SSLeay licenses, Savoir-Faire Linux Inc.
 *  grants you additional permission to convey the resulting work.
 *  Corresponding Source for a non-source form of such a combination
 *  shall include the source code for the parts of OpenSSL used as well
 *  as that of the covered work.
 */
package org.sflphone.fragments;

import org.sflphone.R;
import org.sflphone.adapters.SectionsPagerAdapter;
import org.sflphone.views.PagerSlidingTabStrip;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.app.Fragment;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

public class HomeFragment extends Fragment {
    static final String TAG = HomeFragment.class.getSimpleName();

    /**
     * The {@link ViewPager} that will host the section contents.
     */
    ViewPager mViewPager;
    SectionsPagerAdapter mSectionsPagerAdapter = null;

    @Override
    public void onResume() {
        super.onResume();
        getActivity().getActionBar().setTitle(R.string.menu_item_home);
    }

    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);
    }

    @Override
    public void onDetach() {
        super.onDetach();
    }

    @Override
    public void onCreate(Bundle savedBundle) {
        super.onCreate(savedBundle);
        mSectionsPagerAdapter = new SectionsPagerAdapter(getActivity(), getChildFragmentManager());
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        ViewGroup rootView = (ViewGroup) inflater.inflate(R.layout.frag_home, container, false);

        // Set up the ViewPager with the sections adapter.
        mViewPager = (ViewPager) rootView.findViewById(R.id.pager);
        mViewPager.setPageTransformer(true, new ZoomOutPageTransformer(0.7f));

        mViewPager.setOffscreenPageLimit(2);
        mViewPager.setAdapter(mSectionsPagerAdapter);
        mViewPager.setCurrentItem(1);

        final PagerSlidingTabStrip strip = PagerSlidingTabStrip.class.cast(rootView.findViewById(R.id.pts_main));

        strip.setViewPager(mViewPager);

        return rootView;
    }

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
    }

    public class ZoomOutPageTransformer implements ViewPager.PageTransformer {
        private static final float MIN_ALPHA = .6f;

        public ZoomOutPageTransformer(float scalingStart) {
            super();
        }

        @Override
        public void transformPage(View page, float position) {
            final float normalizedposition = Math.abs(Math.abs(position) - 1);
            page.setAlpha(MIN_ALPHA + (1.f - MIN_ALPHA) * normalizedposition);
        }
    }

}