org.nsoft.openbus.adapter.TimelinePagerAdapter.java Source code

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Here is the source code for org.nsoft.openbus.adapter.TimelinePagerAdapter.java

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/*This file is part of OpenBus project.
*
*OpenBus 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.
*
*OpenBus 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 OpenBus. If not, see <http://www.gnu.org/licenses/>.
*
* Author: Caio Lima
* Date: 30 - 06 - 2013
*/
package org.nsoft.openbus.adapter;

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

import org.json.JSONException;
import org.nsoft.openbus.model.CollumnConfig;
import org.nsoft.openbus.model.bd.Facade;
import org.nsoft.openbus.view.AbstractColumn;

import android.os.Parcelable;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.ListView;

public class TimelinePagerAdapter extends PagerAdapter {

    private List<AbstractColumn> childs = new ArrayList<AbstractColumn>();
    private ViewPager parent;
    private List<ScrollState> states = new ArrayList<ScrollState>();

    public TimelinePagerAdapter(ViewPager pager) {
        parent = pager;
    }

    public void addView(AbstractColumn v) {
        Facade facade = Facade.getInstance(parent.getContext());
        CollumnConfig config = facade.getOneConfig(childs.size());
        int top = 0;
        int scrollTo = 0;
        try {

            if (config != null) {
                top = config.getProprietes().getInt("top");

                scrollTo = config.getProprietes().getInt("scrollTo");
            }

        } catch (JSONException e) {
            // TODO: handle exception
        } finally {
            ScrollState state = new ScrollState();
            state.scrollTo = scrollTo;
            state.top = top;

            states.add(state);
        }

        childs.add(v);

    }

    public void removeViewAtPosition(int position) {
        childs.remove(position);

        states.remove(position);

    }

    @Override
    public void destroyItem(View view, int pos, Object object) {
        if (object instanceof LinearLayout) {
            ListView listView = null;
            try {
                listView = childs.get(pos).getScrollView();
            } catch (Exception e) {
                // TODO: handle exception
            }
            if (listView != null) {
                try {
                    ScrollState state = states.get(pos);
                    ListView vList = listView;
                    int index = vList.getFirstVisiblePosition();
                    View v = vList.getChildAt(0);
                    int top = (v == null) ? 0 : v.getTop();

                    state.top = top;
                    state.scrollTo = index;
                } catch (IndexOutOfBoundsException e) {
                    // TODO: handle exception
                }

            }
            try {
                ((ViewPager) view).removeView((View) object);
            } catch (Exception e) {
                // TODO: handle exception
            }
        }

    }

    @Override
    public void finishUpdate(View arg0) {

    }

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

    @Override
    public Object instantiateItem(View view, int position) {
        View myView = childs.get(position).getCollumnView();
        try {
            ((ViewPager) view).addView(myView);
        } catch (Exception e) {
            // TODO: handle exception
        }
        ListView listView = childs.get(position).getScrollView();
        if (listView != null) {
            Facade facade = Facade.getInstance(parent.getContext());
            CollumnConfig config = facade.getOneConfig(position);

            try {

                int top = states.get(position).top;

                int scrollTo = states.get(position).scrollTo;

                if (top != 0 && scrollTo != 0)
                    listView.setSelectionFromTop(scrollTo, top);
            } catch (IndexOutOfBoundsException e) {
                // TODO: handle exception
            }

        }
        return myView;
    }

    @Override
    public boolean isViewFromObject(View view, Object object) {
        return view == object;
    }

    @Override
    public void restoreState(Parcelable arg0, ClassLoader arg1) {

    }

    @Override
    public Parcelable saveState() {
        return null;
    }

    @Override
    public void startUpdate(View arg0) {

    }

    @Override
    public int getItemPosition(Object object) {
        return POSITION_NONE;
    }

    public void clear() {
        childs.clear();
        notifyDataSetChanged();

    }

    private class ScrollState {
        public int top;
        public int scrollTo;
    }

    @Override
    public CharSequence getPageTitle(int position) {
        return childs.get(position).getColumnTitle();
    }

}