WidgetConfigActivity.java

/*******************************************************************************
 * BBC News Reader
 * Released under the BSD License. See README or LICENSE.
 * Copyright (c) 2011, Digital Lizard (Oscar Key, Thomas Boby)
 * All rights reserved.
 ******************************************************************************/
package com.digitallizard.bbcnewsreader.widget;

import android.app.AlertDialog;
import android.app.Dialog;
import android.appwidget.AppWidgetManager;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.os.Bundle;
import android.widget.AbsListView;
import android.widget.ArrayAdapter;
import android.widget.ListView;

import com.actionbarsherlock.app.SherlockActivity;
import com.actionbarsherlock.view.Menu;
import com.actionbarsherlock.view.MenuItem;
import com.digitallizard.bbcnewsreader.R;
import com.digitallizard.bbcnewsreader.ReaderActivity;
import com.digitallizard.bbcnewsreader.data.DatabaseHandler;

public class WidgetConfigActivity extends SherlockActivity {
	ListView listView;
	String[] enabledCategoriesNames;
	SharedPreferences settings;
	int widgetId;
	private Dialog appNotRunDialog;
	
	void closeAppNotRunDialog() {
		appNotRunDialog = null; // destroy the dialog
		// end the program
		this.setResult(RESULT_CANCELED);
		this.finish();
	}
	
	void showAppNotRunDialog() {
		// only show the error dialog if one isn't already visible
		if (appNotRunDialog == null) {
			AlertDialog.Builder builder = new AlertDialog.Builder(this);
			builder.setMessage("Before using the widget, please first enable some categories by launching the main app.");
			builder.setCancelable(false);
			builder.setPositiveButton("Close", new DialogInterface.OnClickListener() {
				public void onClick(DialogInterface dialog, int id) {
					closeAppNotRunDialog();
				}
			});
			appNotRunDialog = builder.create();
			appNotRunDialog.show();
		}
	}
	
	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		super.onCreateOptionsMenu(menu);
		// inflate the menu
		getSupportMenuInflater().inflate(R.menu.category_chooser_menu, menu);
		return true; // we have made the menu so we can return true
	}
	
	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		if (item.getItemId() == R.id.categoryChooserMenuItemSave) {
			// store the selected category
			String chosenCategory = enabledCategoriesNames[listView.getCheckedItemPosition()];
			Editor editor = settings.edit();
			editor.putString(ReaderWidget.PREF_KEY_CATEGORY + widgetId, chosenCategory);
			editor.commit();
			
			// update the widget
			Intent intent = new Intent(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
			int[] widgetIds = { widgetId };
			intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, widgetIds);
			sendBroadcast(intent);
			
			// send a successful result
			Intent successResult = new Intent();
			successResult.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, widgetId);
			setResult(RESULT_OK, successResult);
			finish(); // end the activity and send the result
			
			return true;
		}
		else {
			return super.onOptionsItemSelected(item);
		}
	}
	
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		this.setContentView(R.layout.widget_config);
		widgetId = getIntent().getIntExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, AppWidgetManager.INVALID_APPWIDGET_ID);
		
		// if the activity is cancelled
		Intent cancelResult = new Intent();
		cancelResult.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, widgetId);
		setResult(RESULT_CANCELED, cancelResult);
		
		// connect to the database and retrieve the enabled categories
		DatabaseHandler database = new DatabaseHandler(this);
		String[][] enabledCategories = database.getEnabledCategories();
		// if no categories were enabled, do not allow the user to proceed
		if (enabledCategories == null || enabledCategories[0].length == 0) {
			showAppNotRunDialog();
			return; // bail here
		}
		
		enabledCategoriesNames = enabledCategories[1];
		
		// set up the list view
		listView = (ListView) this.findViewById(R.id.widgetCategoryChoiceListView);
		listView.setAdapter(new ArrayAdapter<String>(this, R.layout.category_chooser_selectable_item, enabledCategoriesNames));
		listView.setChoiceMode(AbsListView.CHOICE_MODE_SINGLE);
		
		// find the id of the current item and enable it
		settings = getSharedPreferences(ReaderActivity.PREFS_FILE_NAME, MODE_PRIVATE);
		String enabledCategory = settings.getString(ReaderWidget.PREF_KEY_CATEGORY + widgetId, ReaderWidget.DEFAULT_CATEGORY);
		int enabledCategoryId = 0;
		for (int i = 0; i < enabledCategoriesNames.length; i++) {
			if (enabledCategoriesNames[i].equals(enabledCategory)) {
				enabledCategoryId = i;
			}
		}
		listView.setItemChecked(enabledCategoryId, true);
	}
}