com.handlerexploit.news.adapters.PagerAdapter.java Source code

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Here is the source code for com.handlerexploit.news.adapters.PagerAdapter.java

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/*
 *  Copyright (c) 2011 Adam Shanks, Daniel Huckaby
 *
 *  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.handlerexploit.news.adapters;

import java.util.ArrayList;

import com.handlerexploit.news.widgets.PagerHeader;
import com.handlerexploit.news.widgets.PagerHeader.OnHeaderClickListener;

import android.content.Context;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentStatePagerAdapter;
import android.support.v4.view.ViewPager;

public class PagerAdapter extends FragmentStatePagerAdapter
        implements ViewPager.OnPageChangeListener, OnHeaderClickListener {

    private final Context mContext;
    private final ViewPager mPager;
    private final PagerHeader mHeader;
    private final ArrayList<PageInfo> mPages = new ArrayList<PageInfo>();

    static final class PageInfo {
        private final Class<?> clss;
        private final Bundle args;

        PageInfo(Class<?> _clss, Bundle _args) {
            clss = _clss;
            args = _args;
        }
    }

    public PagerAdapter(FragmentActivity activity, ViewPager pager, PagerHeader header) {
        super(activity.getSupportFragmentManager());
        mContext = activity;
        mHeader = header;
        mHeader.setOnHeaderClickListener(this);
        mPager = pager;
        mPager.setAdapter(this);
        mPager.setOnPageChangeListener(this);
    }

    public void addPage(Class<?> clss, Bundle args, String title) {
        PageInfo info = new PageInfo(clss, args);
        mPages.add(info);
        mHeader.add(0, title);
        notifyDataSetChanged();
    }

    @Override
    public int getCount() {
        return mHeader.getChildCount();
    }

    @Override
    public Fragment getItem(int position) {
        PageInfo info = mPages.get(position);
        Fragment fragment = Fragment.instantiate(mContext, info.clss.getName(), info.args);
        return fragment;
    }

    @Override
    public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
        mHeader.setPosition(position, positionOffset, positionOffsetPixels);
    }

    @Override
    public void onPageSelected(int position) {
        mHeader.setDisplayedPage(position);
    }

    @Override
    public void onPageScrollStateChanged(int state) {
        // Ignore
    }

    @Override
    public void onHeaderSelected(int position) {
        mPager.setCurrentItem(position);
    }

    @Override
    public void onHeaderClicked(int position) {
        // Ignore
    }

    public static interface OnRefreshListener {
        public void onRefresh();
    }
}