/*

     File: SamplesController.m

 Abstract: A table view controller to manage and display a list file names of sample layouts to draw.

 The view controller manages one array:

 * samplesForDisplay is the array that corresponds to the full set samples the app can show.

 The table view displays the contents of the samplesForDisplay array.

 The view controller has a delegate that it notifies if row in the table view is selected.

  Version: 1.1

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*/

#import "SamplesController.h"

@implementation SamplesController

@synthesize delegate, samplesForDisplay, selectedSample;

// Utility helper method to extract list of sample document filenames from bundle

// used to present list of samples for user selection in UI.

- (NSArray*)copySamplesInBundle {

    NSMutableArray* result = [[NSMutableArray alloc] init];

    NSArray* filesInBundle = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:[[NSBundle mainBundle] bundlePath] error:NULL];  

    for (NSString* fileName in filesInBundle) {

        if ([fileName hasSuffix:@".xml"]) {

            // remove file extension for UI

            [result addObject:[fileName stringByDeletingPathExtension]];

        }

    }

    return result;

}

#pragma mark -

#pragma mark View lifecycle

- (void)viewDidLoad {

    [super viewDidLoad];

    self.title = @"Samples";

    self.contentSizeForViewInPopover = CGSizeMake(300.0, 280.0);

    // Get list of samples to show in UI 

    samplesForDisplay = [self copySamplesInBundle]; 

    // Initially, there is no active sample (RootViewController will specify this)

    selectedSample = @"";

}

- (BOOL)shouldAutorotate {

    return YES;

}

#pragma mark -

#pragma mark Table view methods

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

    return [samplesForDisplay count];

}

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

    static NSString *CellIdentifier = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

    if (cell == nil) {

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

    }

    // Set the tableview cell text to the name of the sample at the given index

    NSString *cellSampleName = [samplesForDisplay objectAtIndex:indexPath.row];

    cell.textLabel.text = cellSampleName; 

    if ([selectedSample isEqual:cellSampleName]) {

        cell.accessoryType = UITableViewCellAccessoryCheckmark;

    } else {

        cell.accessoryType = UITableViewCellAccessoryNone;

    }

    return cell;

}

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

    NSString *cellSampleName = [samplesForDisplay objectAtIndex:indexPath.row];

    // Notify the delegate if a row is selected (adding back file extension for delegate)

    if (delegate && [delegate respondsToSelector:@selector(samplesController:didSelectString:)]) {

        [delegate samplesController:self didSelectString:[cellSampleName stringByAppendingPathExtension:@"xml"]];

    }

    self.selectedSample = cellSampleName;

    [self.tableView reloadData]; // refresh tableView cells for selection state change

}

#pragma mark -

#pragma mark Memory management

- (void)dealloc {

    [samplesForDisplay release];

    [super dealloc];

}

@end