/*

     File: ElementsTableViewController.m

 Abstract: Coordinates the tableviews and element data sources. It also responds

 to changes of selection in the table view and provides the cells.

  Version: 1.12

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 */

#import "ElementsTableViewController.h"

#import "AtomicElement.h"

#import "AtomicElementTableViewCell.h"

#import "AtomicElementViewController.h"

#import "TheElementsAppDelegate.h"

#import "ElementsDataSourceProtocol.h"

@implementation ElementsTableViewController

- (void)setDataSource:(id<ElementsDataSource,UITableViewDataSource>)dataSource {

    // retain the data source

    _dataSource = dataSource;

    // set the title, and tab bar images from the dataSource

    // object. These are part of the ElementsDataSource Protocol

    self.title = [_dataSource name];

    self.tabBarItem.image = [_dataSource tabBarImage];

    // set the long name shown in the navigation bar

    self.navigationItem.title = [_dataSource navigationBarName];

}

- (void)viewDidLoad {

    [super viewDidLoad];

    self.tableView.sectionIndexMinimumDisplayRowCount = 10;

    self.tableView.delegate = self;

    self.tableView.dataSource = self.dataSource;

    // create a custom navigation bar button and set it to always say "back"

    UIBarButtonItem *temporaryBarButtonItem = [[UIBarButtonItem alloc] init];

    temporaryBarButtonItem.title = @"Back";

    self.navigationItem.backBarButtonItem = temporaryBarButtonItem;

}

- (void)viewWillAppear:(BOOL)animated {

    // force the tableview to load

    [self.tableView reloadData];

}

#pragma mark - UITableViewDelegate

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {

    if ([segue.identifier isEqualToString:@"showDetail"]) {

        NSIndexPath *selectedIndexPath = [self.tableView indexPathForSelectedRow];

        // find the right view controller

        AtomicElement *element = [self.dataSource atomicElementForIndexPath:selectedIndexPath];

        AtomicElementViewController *viewController =

            (AtomicElementViewController *)segue.destinationViewController;

        // hide the bottom tabbar when we push this view controller

        viewController.hidesBottomBarWhenPushed = YES;

        // pass the element to this detail view controller

        viewController.element = element;

    }

}

@end