Sources/Frameworks/Controller/OutlineViewController.mm

/*
 Copyright (C) 2015 Apple Inc. All Rights Reserved.
 See LICENSE.txt for this sample’s licensing information
 
 Abstract:
 View controller object for OpenGL query features' outline.
 */
 
#import "OutlineViewController.h"
 
@implementation OutlineViewController
{
@private
    QueryDataSource* mpQuery;
}
 
#pragma mark -
#pragma mark Public - Initializer
 
- (instancetype) init
{
    self = [super init];
    
    if(self)
    {
        mpQuery = [QueryDataSource new];
    } // if
    
    return self;
} // init
 
#pragma mark -
#pragma mark Public - Delegates
 
- (BOOL) allowFirstDisplayToExpand
{
    return YES;
} // allowFirstDisplayToExpand
 
- (BOOL) outlineView:(NSOutlineView *)outlineView
  shouldCollapseItem:(id)item
{
    return YES;
} // outlineView
 
- (BOOL) outlineView:(NSOutlineView *)outlineView
    isItemExpandable:(id)item
{
    if([item isKindOfClass:[NSDictionary class]] || [item isKindOfClass:[NSArray class]])
    {
        return YES;
    } // if
    else
    {
        return NO;
    } // else
} // outlineView
 
- (NSInteger) outlineView:(NSOutlineView *)outlineView
   numberOfChildrenOfItem:(id)item
{
    if(item == nil)
    {
        return mpQuery.data.count;
    } // if
    
    if([item isKindOfClass:[NSDictionary class]])
    {
        NSDictionary* children = item[@"children"];
        
        return children.count;
    } // if
    
    return 0;
} // outlineView
 
- (id) outlineView:(NSOutlineView *)outlineView
             child:(NSInteger)index
            ofItem:(id)item
{
    if(item == nil)
    {
        return mpQuery.data[index];
    } // if
    
    if([item isKindOfClass:[NSDictionary class]])
    {
        NSArray* children = item[@"children"];
        
        return children[index];
    } // if
    
    return nil;
} // outlineView
 
- (id)          outlineView:(NSOutlineView *)outlineView
  objectValueForTableColumn:(NSTableColumn *)theColumn
                     byItem:(id)item
{
    
    if([[theColumn identifier] isEqualToString:@"children"])
    {
        if([item isKindOfClass:[NSDictionary class]])
        {
            return [NSString stringWithFormat:@"%ld items",[item[@"children"] count]];
        } // if
        
        return item;
    } // if
    else
    {
        if([item isKindOfClass:[NSDictionary class]])
        {
            return item[@"parent"];
        } // if
    } // else
    
    return nil;
} // outlineView
 
- (BOOL) outlineView:(NSOutlineView *)outlineView
    shouldExpandItem:(id)item
{
    BOOL bFound = NO;
    
    if([item isKindOfClass:[NSDictionary class]])
    {
        NSAttributedString *pAttrStr = item[@"parent"];
        
        if(pAttrStr)
        {
            bFound = [mpQuery isParent:pAttrStr.string];
        } // if
    } // if
    
    return bFound;
} // outlineView
 
#pragma mark -
#pragma mark Public - Destructor
 
- (void) dealloc
{
    if(mpQuery)
    {
        [mpQuery release];
        
        mpQuery = nil;
    } // if
    
    [super dealloc];
} // dealloc
 
@end


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