/*

     File: Level3ViewController.m

 Abstract: The application's level 3 view controller.

  Version: 1.3

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 */

#import "AppDelegate.h"

#import "Level3ViewController.h"

#import "LeafViewController.h"

@implementation Level3ViewController

NSString *kLevel3TitlePage = @"Level 3";

@synthesize listContent, leafViewController, myTableView;

- (void)dealloc

{

    [myTableView release];

    [listContent release];

    [super dealloc];

}

- (void)awakeFromNib

{   

    self.title = @"Level 3";

}

#pragma mark UIViewController delegates

- (void)viewWillAppear:(BOOL)animated

{

    [myTableView reloadData];   // populate our table's data

    NSIndexPath *tableSelection = [myTableView indexPathForSelectedRow];

    [myTableView deselectRowAtIndexPath:tableSelection animated:NO];

}

#pragma mark UITableView delegates

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView

{

    return 1;

}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section

{

    return [listContent count];

}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath

{

    // save off this level's selection to our AppDelegate

    AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];

    [appDelegate.savedLocation replaceObjectAtIndex:2 withObject:[NSNumber numberWithInteger:indexPath.row]];

    leafViewController.title = [[listContent objectAtIndex:indexPath.row] objectForKey:kItemTitleKey];

    // move to the leaf level

    [[self navigationController] pushViewController:leafViewController animated:YES];

    // commit the drill down location preference setting

    [[NSUserDefaults standardUserDefaults] setObject:appDelegate.savedLocation forKey:kRestoreLocationKey];

}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath

{

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:kCellIdentifier];

    if (cell == nil)

    {

        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:kCellIdentifier] autorelease];

        cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;

    }

    // get the view controller's info dictionary based on the indexPath's row

    NSDictionary* item = [listContent objectAtIndex:indexPath.row];

    cell.textLabel.text = [item objectForKey:kItemTitleKey];

    return cell;

}

// User was last at level 3 or at a leaf page

//

// note: this is a part of a chain reaction down each level.

// so that each level restores itself and pushes further down until there's no further stored selections.

//

- (void)restoreLevel:(NSArray*)items withSelectionArray:(NSArray *)selectionArray

{

    // user was last at level 3 or at a leaf page

    //

    self.listContent = items;   // remember our content here at level 1 in case user navigates back to this level

    NSInteger itemIdx = [[selectionArray objectAtIndex:0] integerValue];

    if (itemIdx != -1)

    {

        leafViewController.title = [[listContent objectAtIndex:itemIdx] objectForKey:kItemTitleKey];

        // we have a selection, move one more level deep and restore its content

        // (not animated since the user should not see the restore process)

        [[self navigationController] pushViewController:leafViewController animated:NO];

    }

}

- (void)viewDidAppear:(BOOL)animated

{

    // we have moved to level 3, remove it's stored selection

    AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];

    [appDelegate.savedLocation replaceObjectAtIndex:2 withObject:[NSNumber numberWithInteger:-1]];

    // commit the drill down location preference setting

    [[NSUserDefaults standardUserDefaults] setObject:appDelegate.savedLocation forKey:kRestoreLocationKey];

}

@end