osx - NSOutlineView scroll animation is not working -


i want remove nsoutlineview's show/hide button.so,i override nsoutlineview , mousedown event.the follow code.

    -(void)mousedown:(nsevent *)theevent {     nslog(@"leftfolderlistoutlineview mousedown");     [super mousedown:theevent];      nspoint localpoint = [self convertpoint:theevent.locationinwindow                                    fromview:nil];     nsinteger row = [self rowatpoint:localpoint];      id clickeditem = [self itematrow:row];      if (![clickeditem iskindofclass:[nsdictionary class]]) {         return;     }       if ([self isitemexpanded:clickeditem]) {          [[self animator] collapseitem:clickeditem];      }else{         [[self animator] expanditem:clickeditem];     }  }

it should scroll animation when nsoutlineview collapse or expand.but in case it's not working.anyone tell me why , how can improve this?

to remove 'show/hide button' (outline cell) implement - (nsrect)frameofoutlinecellatrow:(nsinteger)row method in nsoutliveview subclass , return nszerorect.

nsoutlineview collapse/expand animation not animatable via animator.

only os 10.7 or above provide collapse/expand animation effects. planed support older os versions need provide separate implementation.

if want provide collapse/expand animation on os 10.6 or below, needed override 'drawrect' of nsoutlineview.

-- update --

sorry, think neglected main point. 10.7 expand/collapse animation automatically kick in when users clicked outline cell. if want show animation without default outline cells, there no other way manually implementing animation effects, think.

i made sample project implement expand/collapse animation effects image drawing. check source codes in here: https://github.com/roh0sun/ovanimation


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