#import <Cocoa/Cocoa.h>

@protocol MyDataSource
@optional
- (unsigned int)numberOfElements;
@end

@interface MyController : NSObject <MyDataSource>
{
    NSView           *view;
    NSString         *name;
    NSStringEncoding  encoding;
}

@property (nonatomic, retain) IBOutlet NSView   *view;
@property (nonatomic, copy)            NSString *name;

- (IBAction)show:(id)sender;
- (IBAction)hide:(id)sender;

- (BOOL)isEnabled;

@end

@implementation MyController

@synthesize view;
@synthesize name;

- (id)init
{
    self = [super init];
    if (self)
    {
        view     = nil;
        name     = @"Untitled";
        encoding = NSUTF8StringEncoding;
    }
    return self;
}

- (void)dealloc
{
    [view release];
    [name release];
    [super dealloc];
}

- (IBAction)show:(id)sender
{
    [view setEnabled:YES];
}

- (IBAction)hide:(id)sender
{
    [view setEnabled:NO];
}

- (BOOL)isEnabled
{
    return [view isEnabled];
}

@end