//////////

//

//  File:       MyDataSource.m

//

//  Contains:   Implementation file for the MyDataSource class.

//

//  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"

@implementation MyDataSource

// NSOutlineView Data Source methods

//

// This class implements all the required NSOutlineView data source functions

// Refer to the NSOutlineView documentation for additional information.

//

//////////

//

// numberOfChildrenOfItem

//

// Returns the number of child items encompassed by item

//

//////////

- (int)outlineView:(NSOutlineView *)outlineView numberOfChildrenOfItem:(id)item {

    return (item == nil) ? 1 : [item numberOfChildren:outlineView];

}

//////////

//

// numberOfChildrenOfItem

//

// This method should return YES if item can be expanded to display its children

//

//////////

- (BOOL)outlineView:(NSOutlineView *)outlineView isItemExpandable:(id)item {

    return (item == nil) ? YES : ([item numberOfChildren:outlineView] != -1);

}

//////////

//

// child ofItem

//

// Returns the child item at the specified index.

//

//////////

- (id)outlineView:(NSOutlineView *)outlineView child:(int)index ofItem:(id)item {

    return (item == nil) ? [SG_Device rootItem] : [item childAtIndex:index];

}

//////////

//

// objectValueForTableColumn

//

// Returns the data object associated with the specified item. The item is located 

// in the specified tableColumn of the view. 

//

//////////

- (id)outlineView:(NSOutlineView *)outlineView objectValueForTableColumn:(NSTableColumn *)tableColumn byItem:(id)item {

    return (item == nil) ? @"Sequence Grabber Devices" : [item returnObjValue:self];

}

//////////

//

// shouldEditTableColumn

//

// Returns YES to permit aTableView to edit the cell at rowIndex in aTableColumn, 

// NO to deny permission. 

//

//////////

- (BOOL)outlineView:(NSOutlineView *)outlineView shouldEditTableColumn:(NSTableColumn *)tableColumn item:(id)item {

    return NO;

}

//////////

//

// shouldSelectItem

//

// Returns YES to permit outlineView to select item, NO to deny permission 

//

//////////

- (BOOL)outlineView:(NSOutlineView *)outlineView shouldSelectItem:(id)item

{

    return YES;

}

@end