AgendaFragment.java

package edu.vanderbilt.vm.guide.ui;

import android.widget.*;
import edu.vanderbilt.vm.guide.container.Agenda;
import edu.vanderbilt.vm.guide.ui.adapter.AgendaEditItemView;
import edu.vanderbilt.vm.guide.ui.adapter.PlaceItemView;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.actionbarsherlock.app.SherlockFragment;
import com.actionbarsherlock.view.MenuItem;

import android.database.Cursor;
import android.location.Location;
import android.os.Bundle;
import android.text.Html;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import edu.vanderbilt.vm.guide.R;
import edu.vanderbilt.vm.guide.container.Place;
import edu.vanderbilt.vm.guide.db.GuideDBConstants;
import edu.vanderbilt.vm.guide.db.GuideDBOpenHelper;
import edu.vanderbilt.vm.guide.ui.adapter.AgendaAdapter;
import edu.vanderbilt.vm.guide.ui.listener.GeomancerListener;
import edu.vanderbilt.vm.guide.util.DBUtils;
import edu.vanderbilt.vm.guide.util.Geomancer;
import edu.vanderbilt.vm.guide.util.GlobalState;
import edu.vanderbilt.vm.guide.util.ImageDownloader;

import java.util.Set;

public class AgendaFragment extends SherlockFragment implements GeomancerListener {

    private static final Logger logger = LoggerFactory.getLogger("ui.AgendaFragment");

    private final int DESCRIPTION_LENGTH = 100;
    
    private View mRoot;
    
    private Cursor mAllPlacesCursor;
    
    private Place mCurrentPlace;
    
    private ImageDownloader.BitmapDownloaderTask mDlTask = null;

    // Views
    private ListView mListView;
    private ImageButton mEditButton;
    private ImageButton mDeleteButton;


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        mRoot = inflater.inflate(R.layout.fragment_agenda, container, false);
        return mRoot;
    }
    
    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        
        GuideDBOpenHelper helper = new GuideDBOpenHelper(getActivity());
        String[] columns = {
                GuideDBConstants.PlaceTable.NAME_COL, GuideDBConstants.PlaceTable.CATEGORY_COL,
                GuideDBConstants.PlaceTable.LATITUDE_COL,
                GuideDBConstants.PlaceTable.LONGITUDE_COL, GuideDBConstants.PlaceTable.ID_COL,
                GuideDBConstants.PlaceTable.DESCRIPTION_COL,
                GuideDBConstants.PlaceTable.IMAGE_LOC_COL
        };
        mAllPlacesCursor = DBUtils.getAllPlaces(columns, helper.getReadableDatabase());
        //helper.close();
        
        
        mListView = (ListView) mRoot.findViewById(R.id.agenda_list);
        mListView.setAdapter(new AgendaAdapter(getActivity(), GlobalState.getUserAgenda(), PlaceItemView.getFactory()));

        
        // Add an empty agenda indicator
        TextView emptyIndicator = (TextView) getActivity().getLayoutInflater()
                .inflate(R.layout.agenda_empty, null, false);
        ((ViewGroup) mListView.getParent()).addView(emptyIndicator);
        mListView.setEmptyView(emptyIndicator);

        // Setup button
        mEditButton = (ImageButton) mRoot.findViewById(R.id.agenda_edit);
        mEditButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                if (GlobalState.getUserAgenda().size() != 0) {
                    v.setVisibility(View.GONE);
                    mDeleteButton.setVisibility(View.VISIBLE);

                    mListView.setAdapter(new AgendaAdapter(getActivity(), GlobalState.getUserAgenda(), AgendaEditItemView.getFactory()));
                    mListView.invalidateViews();
                }

            }
        });


        mDeleteButton = (ImageButton) mRoot.findViewById(R.id.agenda_remove);
        mDeleteButton.setOnClickListener(new View.OnClickListener() {
            @SuppressWarnings("unchecked")
            @Override
            public void onClick(View v) {

                Agenda a = GlobalState.getUserAgenda();
                Set<Integer> checkedSet = (Set<Integer>) mListView.getChildAt(0).getTag();

                for (int i = a.size() - 1; i >= 0; i--) {

                    if (checkedSet.contains(i)) {
                        a.remove(a.get(i));
                    }

                }

                if (checkedSet.size() == 1) {
                    Toast.makeText(getActivity(), "Removed 1 place from the Agenda",
                            Toast.LENGTH_LONG).show();
                } else if (checkedSet.size() > 1) {
                    Toast.makeText(getActivity(), "Removed " + checkedSet.size() + " places from the Agenda",
                            Toast.LENGTH_LONG).show();
                }

                v.setVisibility(View.GONE);
                mEditButton.setVisibility(View.VISIBLE);

                mListView.setAdapter(new AgendaAdapter(getActivity(), a, PlaceItemView.getFactory()));
                mListView.invalidateViews();

            }
        });

        mRoot.findViewById(R.id.current_ll_ref).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                PlaceDetailer.open(getActivity(), mCurrentPlace.getUniqueId());
            }
        });


        updateLocation(Geomancer.getDeviceLocation());
        setHasOptionsMenu(true);
    }

    
    @Override
    public void onResume() {
        super.onResume();
        logger.trace("AgendaFragment: OnResume called");
        Geomancer.registerGeomancerListener(this);
    }
    
    @Override
    public void onPause() {
        super.onPause();
        Geomancer.removeGeomancerListener(this);
    }
    
    /*
    public void onReselect() {
        try {
            ((ListView) mRoot.findViewById(R.id.s_l_listview1)).invalidateViews();
            
        } catch (IllegalStateException e) {
            logger.info("Caught IllegalStateException: ", e);
        }
    }
*/
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case R.id.menu_sort_alphabetic:
                GlobalState.getUserAgenda().sortAlphabetically();
                ((ListView) mRoot.findViewById(R.id.s_l_listview1)).invalidateViews();
                Toast.makeText(getActivity(), "Agenda is sorted alphabetically", Toast.LENGTH_SHORT)
                        .show();
                return true;

            case R.id.menu_sort_distance:
                GlobalState.getUserAgenda().sortByDistance();
                ((ListView) mRoot.findViewById(R.id.s_l_listview1)).invalidateViews();
                Toast.makeText(getActivity(), "Agenda is sorted by distance", Toast.LENGTH_SHORT)
                        .show();
                return true;
                
            default:
                return false;
        }
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        if (mDlTask != null) {
            logger.trace("Cancelling image download task");
            mDlTask.cancel(true);
        }
        
        mAllPlacesCursor.close();
    }
    
    @Override
    public void updateLocation(Location loc) {
        if (loc == null) {
            return;
        }

        int closestIx = Geomancer.findClosestPlace(loc, mAllPlacesCursor);
        if (closestIx == -1) {
            Toast.makeText(getActivity(), "Couldn't find closest place", Toast.LENGTH_LONG).show();
        } else {
            mAllPlacesCursor.moveToPosition(closestIx);
            mCurrentPlace = DBUtils.getPlaceFromCursor(mAllPlacesCursor);
            fillViews();

            mListView.invalidateViews();

        }
        
    }
    
    private void fillViews() {
        String desc = mCurrentPlace.getDescription();
        if (desc.length() > DESCRIPTION_LENGTH) {
            desc = desc.substring(0, DESCRIPTION_LENGTH).concat("...");
        }
        
        ((TextView) mRoot.findViewById(R.id.location_prev_desc)).setText(
                Html.fromHtml("<b>" + mCurrentPlace.getName() + "</b> " + desc));
        
        ImageView iv = (ImageView)mRoot.findViewById(R.id.current_img);
        mDlTask = new ImageDownloader.BitmapDownloaderTask(iv);
        logger.trace("Starting image download task");
        mDlTask.execute(mCurrentPlace.getPictureLoc());

        
        
    }

}