//////////

//

//  File:       Node.m

//

//  Contains:   Implementation file for the Node class.

//              This class represents a generic "list record" item

//              which can be used with the Cocoa NSOutlineView class to

//              build a list of hierarchical data items which are displayed

//              in a row-and-column format

//

//  Written by: Apple Developer Technical Support

//

//  Copyright:  © 2002 by Apple Computer, Inc., all rights reserved.

//

//  Change History (most recent first):

//     

//     <1>      10/7/02 srk     first file

//

//////////

/*

 IMPORTANT:  This Apple software is supplied to you by Apple Computer, Inc. ("Apple") in

 consideration of your agreement to the following terms, and your use, installation, 

 modification or redistribution of this Apple software constitutes acceptance of these 

 terms.  If you do not agree with these terms, please do not use, install, modify or 

 redistribute this Apple software.

 In consideration of your agreement to abide by the following terms, and subject to these 

 terms, Apple grants you a personal, non-exclusive license, under AppleÕs copyrights in 

 this original Apple software (the "Apple Software"), to use, reproduce, modify and 

 redistribute the Apple Software, with or without modifications, in source and/or binary 

 forms; provided that if you redistribute the Apple Software in its entirety and without 

 modifications, you must retain this notice and the following text and disclaimers in all 

 such redistributions of the Apple Software.  Neither the name, trademarks, service marks 

 or logos of Apple Computer, Inc. may be used to endorse or promote products derived from 

 the Apple Software without specific prior written permission from Apple. Except as expressly

 stated in this notice, no other rights or licenses, express or implied, are granted by Apple

 herein, including but not limited to any patent rights that may be infringed by your 

 derivative works or by other works in which the Apple Software may be incorporated.

 The Apple Software is provided by Apple on an "AS IS" basis.  APPLE MAKES NO WARRANTIES, 

 EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, 

 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS 

 USE AND OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.

 IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL 

 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 

 OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, 

 REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED AND 

 WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR 

 OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

*/

#import "MyDataSource.h"

#import "Node.h"

@implementation Node

//////////

//

// rootItem

//

// Class method to create a Node object

//

//////////

static Node *rootItem = nil;

+ (Node *)rootItem 

{

    if (rootItem == nil) 

    {

        rootItem = [[Node alloc] init];

    }

    return rootItem;       

}

//////////

//

// init

//

//////////

-(id)init

{

    if (self == [super init])

    {

            /* display name for the NSOutlineView */

        nameString = [[NSMutableString alloc] initWithFormat:@"ColorSync Devices"];

            /* an array of child objects for this list record item - these represent

               the child items you would see in the NSOutlineView hierarchical display

               for this list item when the user clicks the twist-down arrow icon  */

        childNodes = [[NSMutableArray alloc] init];

    }

    return self;

}

//////////

//

// childAtIndex

//

// Called by our NSOutlineView data source object. Returns the object at the specified index in our child object array.

//

//////////

-(id)childAtIndex:(int)index

{

    return [[[childNodes objectAtIndex:index] retain] autorelease];

}

//////////

//

// numberOfChildren

//

// Called by our NSOutlineView data source object. Returns the number of objects in our array.

//

//////////

-(int)numberOfChildren:(NSOutlineView *)outlineView

{

    return [childNodes count];

}

//////////

//

// returnObjValue

//

// Called by our NSOutlineView data source object. Returns the display string for the selected object.

//

//////////

-(id)returnObjValue:(id)sender

{

    return [[nameString retain] autorelease];

}

//////////

//

// setDisplayString

//

// Setter function which sets a new value for the display string

//

//////////

-(void)setDisplayString:(NSString *)newString

{

    [nameString setString:newString];

}

//////////

//

// addChildObject

//

// Add a child object to this objects array of child objects.

//

//////////

-(void)addChildObject:(id)childObject

{

    [childNodes addObject:childObject];

}

//////////

//

// dealloc

//

//////////

-(void)dealloc

{

    [childNodes release];

    [nameString release];

    if (rootItem != nil)

    {

        [rootItem release];

    }

    [super dealloc];

}

@end