macOS NSOulineView scroll position

[BollywooD]

I have an NSOutlineView, that when reloaded - always reloads to the scroll position declared in my awakeFromNib. I would like to reload it to the same scroll position before it was reloaded.

How can I do this.....

thanks in advance.
😕

 

[kainjow]

Not sure I understand the question exactly, but you can set the scroll position through a variety of ways. Easiest might be to use NSTableView's scrollRowToVisible: method.

 

[BollywooD]

Ill give that a try, after dinner.

thanks.

just to clarify a bit, the NSOutlineView is bound to an NSTreeController, which reloads itself every-time the data changes. (the data is the NSHTTPCookiesStorage, which changes often)

when the NSOutline view does reload, it reloads with the last selectedObject focused, I would like it to reload to where the view was - regardless of where the last selectedObject is inside the NSOutlineView.

I hope that makes some kind of sense....

 

[BollywooD]

Is there a method which outputs - which rows are visible at any given time in the OutlineView?

 

[kainjow]

I don't see anything directly, but with a combination of the visibleRect and rowsInRect: methods you could probably do what you want. You might have to override NSArrayController to customize the behavior though.

 

[BollywooD]

Ive been playing around with rowAtPoint, but cant make it work. ill try your suggestions.

thanks

 

[BollywooD]

I used to following code, which works reasonably well....

there is a slight jump, to the closest available row - which is better than what i had before....

NSRange rowRange = [myOutlineView rowsInRect:[myOutlineView visibleRect]];
	
	int row = (NSMaxRange(rowRange));
	int newRow = (row - 1);
		
/////reload myOutlineView
	
	[myOutlineView scrollRowToVisible:newRow];

itd be nice if I could eliminate that small 'jump' also.

 

[BollywooD]

I found this code in Apple's documents (go figure)

//get current scroll position
NSPoint currentScrollPosition = [[myScrollView contentView] bounds].origin;
		
//reload OutlineView/ScrollView	

//restore scroll position
[[myScrollView documentView] scrollPoint:currentScrollPosition];

it does exactly what I need.