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Re: Deletes Object on Remove option


On Apr 2, 2006, at 11:46 AM, mmalcolm crawford wrote:


On Apr 1, 2006, at 12:47 PM, email@hidden wrote:

For a contentSet binding, I have the "Deletes Object on Remove" option set. I'd like to know if there is a way to change this setting programmatically?

Re-establish the binding...

NSDictionary *info = [arrayController infoForBinding:@"contentSet"];
NSMutableDictionary *options = [NSMutableDictionary dictionaryWithDictionary:
[info objectForKey:NSOptionsKey]];
BOOL deletesOnRemove =
[((NSNumber *)[options objectForKey:NSDeletesObjectsOnRemoveBindingsOption]) boolValue];
deletesOnRemove = 1-deletesOnRemove;
[options setObject:[NSNumber numberWithBool:deletesOnRemove]
forKey:NSDeletesObjectsOnRemoveBindingsOption];

[arrayController bind:@"contentSet"
toObject:[info objectForKey:NSObservedObjectKey]
withKeyPath:[info objectForKey:NSObservedKeyPathKey]
options:options];

mmalc

Thanks, that seemed to re-establish the bindings. However, I noticed something odd: I don't get the same behavior as when I uncheck "Deletes Object on Remove" in IB. Below is the code I'm using. The method moveObjectsInArrangedObjectsFromIndexes is from some Apple sample code for dragging and dropping rows within the same table view, something I'm trying to do. If I use the code below, nothing happens when I drag and drop within the same table view. However, if I comment out setDeletesOnRemove and uncheck "Deletes Object on Remove" in IB, it works! Any hints as to where to look next would be appreciated.
Thanks,
Bill

-(void) setDeletesOnRemove:(NSArrayController*)inArrayController deletesOnRemove:(BOOL)inDeletesOnRemove
{
NSDictionary *info = [inArrayController infoForBinding:@"contentSet"];
NSMutableDictionary *options = [NSMutableDictionary dictionaryWithDictionary:[info objectForKey:NSOptionsKey]];
BOOL deletesOnRemove = [((NSNumber *)[options objectForKey:NSDeletesObjectsOnRemoveBindingsOption]) boolValue];
if( inDeletesOnRemove != deletesOnRemove ) {
[options setObject:[NSNumber numberWithBool:inDeletesOnRemove] forKey:NSDeletesObjectsOnRemoveBindingsOption];

[inArrayController bind:@"contentSet"
toObject:[info objectForKey:NSObservedObjectKey]
withKeyPath:[info objectForKey:NSObservedKeyPathKey]
options:options];
}
}


-(void) moveObjectsInArrangedObjectsFromIndexes:(NSIndexSet*)indexSet toIndex:(unsigned int)insertIndex
{
[self setDeletesOnRemove:timeLineController deletesOnRemove:NO];
NSArray *objects = [timeLineController arrangedObjects];
int index = [indexSet lastIndex];

int aboveInsertIndexCount = 0;
id object;
int removeIndex;

while (NSNotFound != index)
{
if (index >= insertIndex) {
removeIndex = index + aboveInsertIndexCount;
aboveInsertIndexCount += 1;
} else {
removeIndex = index;
insertIndex -= 1;
}
object = [objects objectAtIndex:removeIndex];
[timeLineController removeObjectAtArrangedObjectIndex:removeIndex];
[timeLineController insertObject:object atArrangedObjectIndex:insertIndex];

index = [indexSet indexLessThanIndex:index];
}
[self setDeletesOnRemove:timeLineController deletesOnRemove:YES];
}

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References: 
 >Deletes Object on Remove option (From: email@hidden)
 >Re: Deletes Object on Remove option (From: mmalcolm crawford <email@hidden>)



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