Focus events

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OnUp

The user press the change focus to previous control.

OnDown

The user press the change focus to next focus control.

OnLeft

The user wants to decrease the value shown to the control to be decreased.

OnRight

The user wants to decrease the value shown to the control to be increased.

OnEnter

The user wants to apply all settings from current screen and if are more screens, to go to following screen. Ussually on OnEnter command the $next command will follow.

OnCancel

The user wants to cancel all settings from current screen and if are more screens, to go to previous screen. Usually on OnCancel command the $previous command will follow.

OnFocus

If special code should run when a button is enable, you may override that event (for instance to play a small sound here)

OnLostFocus

If special code should run when a button becomes disable, you may override that event (for instance to play a small sound here)

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