/*

     File: AccessoryViewController.m

 Abstract: The table view controller for the Accessory View tab.  It Manages

 a table view where each cell contains a checkbox control in the 

 accessoryView.

  Version: 1.4

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 */

#import "AccessoryViewController.h"

#import "Checkbox.h"

@interface AccessoryViewController ()

//! Product listings from the TableData plist file.

@property (nonatomic, strong) NSMutableArray *dataArray;

@end

@implementation AccessoryViewController

//| ----------------------------------------------------------------------------

- (void)viewDidLoad

{

    [super viewDidLoad];

    // load our data from a plist file inside our app bundle

    NSString *path = [[NSBundle mainBundle] pathForResource:@"TableData" ofType:@"plist"];

    self.dataArray = [NSMutableArray arrayWithContentsOfFile:path];

}

#pragma mark - 

#pragma mark UITableViewDataSource

//| ----------------------------------------------------------------------------

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

{

    return (NSInteger)[self.dataArray count];

}

//| ----------------------------------------------------------------------------

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

{

    static NSString *kStandardCellID = @"StandardCell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:kStandardCellID];

    if (cell.accessoryView == nil) {

        // Only configure the Checkbox control once.

        cell.accessoryView = [[Checkbox alloc] initWithFrame:CGRectMake(0, 0, 25, 43)];

        cell.accessoryView.opaque = NO;

        cell.backgroundColor = [UIColor clearColor];

        [(Checkbox*)cell.accessoryView addTarget:self action:@selector(checkBoxTapped:forEvent:) forControlEvents:UIControlEventValueChanged];

    }

    NSDictionary *item = self.dataArray[(NSUInteger)indexPath.row];

    cell.textLabel.text = [item objectForKey:@"text"];

    [(Checkbox*)cell.accessoryView setChecked: [item[@"checked"] boolValue] ];

    // Accessibility

    [self updateAccessibilityForCell:cell];

    return cell;

}

#pragma mark - 

#pragma mark UITableViewDelegate

//| ----------------------------------------------------------------------------

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

{

    // Find the cell being touched and update its checked/unchecked image.

    UITableViewCell *targetCell = [tableView cellForRowAtIndexPath:indexPath];

    Checkbox *targetCheckbox = (Checkbox*)[targetCell accessoryView];

    targetCheckbox.checked = !targetCheckbox.checked;

    // Don't keep the table selection.

    [self.tableView deselectRowAtIndexPath:indexPath animated:YES];

    // Update our data source array with the new checked state.

    NSMutableDictionary *selectedItem = self.dataArray[(NSUInteger)indexPath.row];

    selectedItem[@"checked"] = @(targetCheckbox.checked);

    // Accessibility

    [self updateAccessibilityForCell:targetCell];

}

//| ----------------------------------------------------------------------------

//! IBAction that is called when the value of a checkbox in any row changes.

//

- (IBAction)checkBoxTapped:(id)sender forEvent:(UIEvent*)event

{

    NSSet *touches = [event allTouches];

    UITouch *touch = [touches anyObject];

    CGPoint currentTouchPosition = [touch locationInView:self.tableView];

    // Lookup the index path of the cell whose checkbox was modified.

    NSIndexPath *indexPath = [self.tableView indexPathForRowAtPoint:currentTouchPosition];

    if (indexPath != nil) {

        // Update our data source array with the new checked state.

        NSMutableDictionary *selectedItem = self.dataArray[(NSUInteger)indexPath.row];

        selectedItem[@"checked"] = @([(Checkbox*)sender isChecked]);

    }

    // Accessibility

    [self updateAccessibilityForCell:[self.tableView cellForRowAtIndexPath:indexPath]];

}

//| ----------------------------------------------------------------------------

//  Because a custom accessory view is used, this method is never invoked by

//  the table view.  If one of the standard UITableViewCellAccessoryTypes were

//  used instead, the table view would invoke this method in response to a tap

//  on the accessory.

//

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

{

}

#pragma mark -

#pragma mark Accessibility

//| ----------------------------------------------------------------------------

//! Utility method for configuring a cell's accessibilityValue based upon the

//! current checkbox state.

//

- (void)updateAccessibilityForCell:(UITableViewCell*)cell

{

    // The cell's accessibilityValue is the Checkbox's accessibilityValue.

    cell.accessibilityValue = cell.accessoryView.accessibilityValue;

}

@end