canvas - How to set focus on a Vbox's specific child in flex 4 -

i have vbox contains several grids children. have scroll see grids. there buttons in grids. if press of button, shows children grid's removing grids vbox , fill children of grid's. there button remove children , fill vbox previous grids. when press button want come specific grid clicked see it's child. if @ bottom of scroll when see grid instead of top grid.but shows me top grid. tried setfocus method. not work.

i have canvas root parent , 1 vbox child. , vbox contains grids. , if press button of grid vbox have grid's children explained above. children of grid grids.

please this. pretty stuck in here. in advance :)

setfocus() method activates component , not scroll viewport. can use

var spdelta:point = datagroup.layout.getscrollpositiondeltatoelement(index);  if (spdelta) {     datagroup.horizontalscrollposition += spdelta.x;     datagroup.verticalscrollposition += spdelta.y; } 

where datagroup can vgroup.

if doesn't work or not want, can try height of component want bring view , move scroller height

var index:number = datagroup.getelementindex(comp); var offset:number = datagroup.getelementat(index).height; scroller.viewport.verticalscrollposition = index * offset; 

where datagroup vgroup , comp data grid want scroll to.