dev.drsoran.moloko.adapters.base.BaseFragmentPagerAdapter.java Source code

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Here is the source code for dev.drsoran.moloko.adapters.base.BaseFragmentPagerAdapter.java

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/* 
 *   Copyright (c) 2012 Ronny Rhricht
 *
 *   This file is part of Moloko.
 *
 *   Moloko 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.
 *
 *   Moloko 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 Moloko.  If not, see <http://www.gnu.org/licenses/>.
 *
 *   Contributors:
 * Ronny Rhricht - implementation
 */

package dev.drsoran.moloko.adapters.base;

import java.util.ArrayList;
import java.util.List;

import android.content.Context;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import dev.drsoran.moloko.fragments.factories.DefaultFragmentFactory;
import dev.drsoran.moloko.util.Strings;

public class BaseFragmentPagerAdapter extends FragmentPagerAdapter {
    public static final class PageInfo {
        private final Class<? extends Fragment> clazz;

        private final Bundle args;

        private Fragment fragment;

        private String pageTitle;

        public PageInfo(Class<? extends Fragment> clazz, Bundle args) {
            this.clazz = clazz;
            this.args = args;
        }

        public String getPageTitle() {
            return pageTitle;
        }

        public void setPageTitle(String pageTitle) {
            this.pageTitle = pageTitle;
        }

        public Fragment getFragment() {
            return fragment;
        }

        public boolean hasFragmentInstantiated() {
            return fragment != null;
        }
    }

    private final Context context;

    private final List<PageInfo> pageInfos = new ArrayList<PageInfo>();

    public BaseFragmentPagerAdapter(Context context, FragmentManager fm) {
        super(fm);
        this.context = context;
    }

    public Context getContext() {
        return context;
    }

    public PageInfo add(Class<? extends Fragment> clazz, Bundle args) {
        final PageInfo info = new PageInfo(clazz, args);

        pageInfos.add(info);
        notifyDataSetChanged();

        return info;
    }

    public PageInfo add(Class<? extends Fragment> clazz, Bundle args, String title) {
        final PageInfo info = new PageInfo(clazz, args);
        info.setPageTitle(title);

        pageInfos.add(info);
        notifyDataSetChanged();

        return info;
    }

    public PageInfo getPageInfo(int position) {
        return pageInfos.get(position);
    }

    @Override
    public Fragment getItem(int position) {
        final PageInfo info = pageInfos.get(position);
        info.fragment = DefaultFragmentFactory.create(context, info.clazz, info.args);
        return info.fragment;
    }

    @Override
    public int getCount() {
        return pageInfos.size();
    }

    @Override
    public CharSequence getPageTitle(int position) {
        return Strings.emptyIfNull(pageInfos.get(position).getPageTitle());
    }
}