Well, I decided let the optimization and threads load for later, my knowledge is poor, and see that very complicated :| Now my main problem is the navigation through cells of grid. All cells have a "value control" (currently a label) where is viewed the value data. I need when a TAB key is pressed the current cell pass to next cell. My question: -How I can "focus" morph (the cell) for begin to listen the key presses events? that morph is really only a PanelMorph subclass. Really I understand than need the behavior of list widgets or textboxes for that cell, force the focus of some way. Regards and thanks for the answers. -- View this message in context: http://n4.nabble.com/Conseils-for-develop-a-grid-tp1299737p1475136.html Sent from the Pharo Smalltalk mailing list archive at Nabble.com.