Disable deployment animations for NSOutlineView

Question

Is there a way to stop deployment animations for NSOutlineView. By “deployment” I mean the animation that occurs when an element expands / collapses and the children slide up / down.

Answer 1

Subclass NSOutlineView and suppress the animation:

-(void) expandItem:(id)item expandChildren:(BOOL)expandChildren
{
    [NSAnimationContext beginGrouping];
    [[NSAnimationContext currentContext] setDuration:0.0];

    [super expandItem:item expandChildren:expandChildren];

    [NSAnimationContext endGrouping];
}

Other methods:

– expandItem:
– expandItem:expandChildren:
– collapseItem:
– collapseItem:collapseChildren: