DiningComparisonSliderAdapter.java

package edu.mit.mitmobile2.dining;

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

import android.content.Context;
import android.graphics.Color;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup.LayoutParams;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import edu.mit.mitmobile2.R;
import edu.mit.mitmobile2.dining.DiningMealIterator.MealOrEmptyDay;
import edu.mit.mitmobile2.dining.DiningModel.DiningDietaryFlag;
import edu.mit.mitmobile2.dining.DiningModel.HouseDiningHall;
import edu.mit.mitmobile2.dining.DiningModel.Meal;
import edu.mit.mitmobile2.dining.DiningModel.MenuItem;

class DiningComparisionSliderAdapter extends DiningHouseAbstractSliderAdapter {

	private Context mContext;
	private int mDarkColor;
	private int mLightColor;
	
	List<HouseDiningHall> mHalls;
	
	public DiningComparisionSliderAdapter(Context context, List<HouseDiningHall> halls, long selectedTime) {	
		super(context);
		mContext = context;
		mHalls = halls;
		
		GregorianCalendar day = new GregorianCalendar();
		day.setTimeInMillis(selectedTime);
		DiningMealIterator mealIterator = new DiningMealIterator(day, mHalls);
		setMealIterator(mealIterator);
		
		
	}	
	
	@Override
	protected View viewForMealOrDay(MealOrEmptyDay mealOrEmptyDay) {
		LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
		View view = inflater.inflate(R.layout.dining_comparison_meal, null);
		DiningDividerLinearLayout hallTitles = (DiningDividerLinearLayout) view.findViewById(R.id.diningComparisonMealHallTitles);
		DiningDividerLinearLayout hallSubtitles = (DiningDividerLinearLayout) view.findViewById(R.id.diningComparisonMealHallSubtitles);
		DiningDividerLinearLayout menus = (DiningDividerLinearLayout) view.findViewById(R.id.diningComparisonMealMenus);
		
		mDarkColor = mContext.getResources().getColor(R.color.diningGray);
		mLightColor = Color.WHITE;
		hallTitles.setDividerColor(mDarkColor);
		hallSubtitles.setDividerColor(mLightColor);
		menus.setDividerColor(mDarkColor);
		
		
		LayoutParams columnLayoutParams = new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT, 1.0f);

		for (HouseDiningHall hall : mHalls) {
			Meal meal = mealOrEmptyDay.getMeal(hall.getID());
			
			TextView titleView = new TextView(mContext);
			titleView.setGravity(Gravity.CENTER);
			titleView.setText(hall.getShortName());
			titleView.setTextAppearance(mContext, R.style.DiningComparisonHallTitle);
			hallTitles.addView(titleView, columnLayoutParams);
			
			TextView subtitleView = new TextView(mContext);
			subtitleView.setGravity(Gravity.CENTER);
			subtitleView.setTextAppearance(mContext, R.style.DiningComparisonHallSubtitle);
			hallSubtitles.addView(subtitleView, columnLayoutParams);
			
			View menuView;
			if (meal != null) {
				subtitleView.setText(meal.getScheduleSummaryForColumns());
				menuView = getMenuView(meal);
			} else {
				menuView = getEmptyMenuView("No meals");
			}
			menus.addView(menuView, columnLayoutParams);
		}
		
		return view;
	}
	
	private View getMenuView(Meal meal) {
		DiningDividerLinearLayout menuItemsLayout = new DiningDividerLinearLayout(mContext);
		menuItemsLayout.setOrientation(LinearLayout.VERTICAL);
		menuItemsLayout.setDividerColor(mDarkColor);
		List<DiningDietaryFlag> appliedFlags = DiningDietaryFlag.loadFilters(mContext);
		boolean noSelectedFlags = appliedFlags.isEmpty();
		if (noSelectedFlags) {
			appliedFlags = new ArrayList<DiningDietaryFlag>(DiningDietaryFlag.allFlags());
		}
		boolean showingMenuItems = false;
		for (MenuItem menuItem : meal.getMenuItems()) {
			boolean showItem = false;
			if (noSelectedFlags) {
				showItem = true;
			}
			for (DiningDietaryFlag flag : menuItem.getDietaryFlags()) {
				if (appliedFlags.contains(flag)) {
					showItem = true;
					break;
				}
			}
			if (showItem) {
				showingMenuItems = true;
				menuItemsLayout.addView(getMenuItemView(menuItem), new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT));
			}
		}	
		
		if (!showingMenuItems) {
			String message;
			if (meal.getMenuItems().size() == 0) {
				message = "No items";
			} else {
				message = "No matching items";
			}
			menuItemsLayout.setDrawHorizontalDivider(false);
			menuItemsLayout.addView(getEmptyMenuView(message));
		}
		return menuItemsLayout;
	}
	
	private View getEmptyMenuView(String message) {
		TextView emptyMessage = new TextView(mContext);
		emptyMessage.setGravity(Gravity.CENTER_HORIZONTAL);
		emptyMessage.setTextAppearance(mContext, R.style.ListItemSecondary);
		emptyMessage.setText(message);
		int topPadding = mContext.getResources().getDimensionPixelSize(R.dimen.standardPadding);
		emptyMessage.setPadding(0, topPadding, 0, 0);
		return emptyMessage;
	}

	
	private View getMenuItemView(MenuItem menuItem) {
		LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
		View view = inflater.inflate(R.layout.dining_comparison_meal_item, null);
		TextView nameView = (TextView) view.findViewById(R.id.diningComparisonMealItemRowName);
		TextView descriptionView = (TextView) view.findViewById(R.id.diningComparisonMealItemRowDescription);
		LinearLayout dietaryFlags = (LinearLayout) view.findViewById(R.id.diningComparisonMealItemRowDietaryFlagsTable);
		
		nameView.setText(menuItem.getName());
		if (menuItem.getDescription() != null) {
			descriptionView.setText(menuItem.getDescription());
		} else {
			descriptionView.setVisibility(View.GONE);
		}
		
		LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
		layoutParams.gravity = Gravity.CENTER_HORIZONTAL;
		for (DiningDietaryFlag flag : menuItem.getDietaryFlags()) {
			ImageView flagImageView = new ImageView(mContext);
			if (flag != null) {
				flagImageView.setImageResource(flag.getIconId());
			}
			dietaryFlags.addView(flagImageView, layoutParams);
		}
		
		return view;
	}
}