ChooseDictionaryWord.java :  » UnTagged » and-bible » net » bible » android » view » activity » navigation » Android Open Source

package net.bible.android.view.activity.navigation;

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

import net.bible.android.activity.R;
import net.bible.android.control.page.CurrentPageManager;
import net.bible.android.view.activity.base.Dialogs;
import net.bible.android.view.activity.base.ListActivityBase;

import org.crosswire.jsword.passage.Key;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ListView;

/**
 * Choose a bible or commentary to use
 * 
 * @author Martin Denham [mjdenham at gmail dot com]
 * @see gnu.lgpl.License for license details.<br>
 *      The copyright to this program is held by it's author.
 */
public class ChooseDictionaryWord extends ListActivityBase {
  private static final String TAG = "ChooseDictionaryWord";
  
  private List<Key> mDictionaryGlobalList;
  private List<Key> mMatchingKeyList;
  
  private static final int LIST_ITEM_TYPE = android.R.layout.simple_list_item_1; 
  
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.choose_dictionary_page);

        // ensure there is actually a dictionary
        if (CurrentPageManager.getInstance().getCurrentDictionary().getCurrentDocument()==null) {
          Log.e(TAG, "No Dictionary");
          finish();
          return;
        }
        
        initialise();
        
        EditText searcheditText = (EditText)findViewById(R.id.searchText);
        searcheditText.addTextChangedListener(new TextWatcher() {
      @Override
      public void onTextChanged(CharSequence searchText, int arg1, int arg2, int arg3) {
        showPossibleDictionaryKeys(searchText.toString());
      }

      @Override
      public void afterTextChanged(Editable searchText) {
      }
      @Override
      public void beforeTextChanged(CharSequence arg0, int arg1,  int arg2, int arg3) {
      }
        });
        searcheditText.requestFocus();
    }

    /**
     * init the list adapter for the current list activity
     * @return
     */
    protected void initialise()
    {
      Log.d(TAG, "Initialising");
      // setting up an initially empty list of matches
      mMatchingKeyList = new ArrayList<Key>();
        setListAdapter(new ArrayAdapter<Key>(ChooseDictionaryWord.this,
              LIST_ITEM_TYPE,
              mMatchingKeyList));
      
      final Handler uiHandler = new Handler();
      Dialogs.getInstance().showHourglass();
      
      new Thread( new Runnable() {

      @Override
      public void run() {
        try {
          // getting all dictionary keys is slow so do in another thread in order to show hourglass
          //TODO need to optimise this using binary search of globalkeylist without caching
          
            //already checked a dictionary exists
            mDictionaryGlobalList = CurrentPageManager.getInstance().getCurrentDictionary().getCachedGlobalKeyList(); 
            
            Log.d(TAG, "Finished Initialising");
        } catch (Throwable t) {
          Log.e(TAG, "Error creating dictionary key list");
            // must dismiss hourglass in ui thread
            uiHandler.post(new Runnable() {
            @Override
            public void run() {
              showErrorMsg("Error preparing dictionary for use.");
            }
            });
        } finally {
            // must dismiss hourglass in ui thread
            uiHandler.post(new Runnable() {
            @Override
            public void run() {
              dismissHourglass();
            }
            });
        }
      }
      }).start();
    }
    
    /** user has typed something so show keys starting with user's text
     * @param searchText
     */
    private void showPossibleDictionaryKeys(String searchText) {
    Log.d(TAG, "Search for:"+searchText);
    try {
      if (mDictionaryGlobalList!=null) {
        searchText = searchText.toLowerCase();
    
        Iterator iter = mDictionaryGlobalList.iterator();
        mMatchingKeyList.clear();
        while (iter.hasNext()) {
          Key key = (Key)iter.next();
          if (key.getName().toLowerCase().startsWith(searchText)) {
            mMatchingKeyList.add(key);
          }
        }
        Log.d(TAG, "matches found:"+mMatchingKeyList.size());
    
          ((ArrayAdapter)getListAdapter()).notifyDataSetChanged();
        Log.d(TAG, "Finished searching for:"+searchText);
      } else {
        Log.d(TAG, "Cached global key list is null");
      }
    } catch (Throwable e) {
      Log.e(TAG, "Error finding matching keys", e);
      showErrorMsg("Error searching dictionary");
    }
    }
    
    @Override
  protected void onListItemClick(ListView l, View v, int position, long id) {
      itemSelected(mMatchingKeyList.get(position));
  }

    private void itemSelected(Key selectedKey) {
      try {
        if (selectedKey!=null) {
          Log.i(TAG, "chose:"+selectedKey);
          CurrentPageManager.getInstance().getCurrentDictionary().setKey(selectedKey);
          doFinish();
        }
      } catch (Exception e) {
        Log.e(TAG, "Key not found", e);
        showErrorMsg("Key not found");
      }
    }

    private void doFinish() {
      Intent resultIntent = new Intent();
      setResult(Activity.RESULT_OK, resultIntent);
      finish();    
    }
    
}