Modes Function Keys and Processing Logic

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Modes, Function Keys and Processing Logic

The following table indicates which function keys are enabled when a particular processing mode is in use and what happens when the function key is used.

Note that to be "enabled" a function key must match the entry in the following table and be specified with the *YES option on the associated command. Refer to the relevant EXIT_KEY, MENU_KEY, ADD_KEY, CHANGE_KEY, DELETE_KEY and PROMPT_KEY parameters for more information.

Additionally, the function key must not have been "disabled" by the specification of a controlling "condition" (previously defined by a DEF_COND command) that is not true at the time the screen panel is processed.

Finally, if a controlling condition has been specified to "enable" or "disable" the function key, it cannot override the LANSA mode sensitive disabling of the key. For instance the CHANGE key will not be enabled in *ADD mode, even if the controlling condition is true.

Mode	Function Key	Enabled	What Happens When Used
*DISPLAY	EXIT/SYSTEM	YES	Function ends or control passed to nominated command. Mode remains unchanged.
	MENU/CANCEL	YES	Process menu re-displayed or control passed to nominated command. Mode remains unchanged.
	MESSAGES	YES	Messages displayed, then current screen re-displayed. Mode remains unchanged.
	PROMPT	YES	Prompt request processed, then current screen re-displayed. Mode remains unchanged.
	ADD	YES	Mode changed to *ADD. Control is passed to nominated label.
	CHANGE	YES	Mode is changed to *CHANGE. Current screen is re-displayed with input capable fields to allow changes to be made.
	DELETE	YES	Mode is changed to *DELETE. Current screen is re-displayed with a message requesting that the delete request be confirmed.
*CHANGE	EXIT/SYSTEM	YES	Function ends or control passed to nominated command. Mode remains unchanged.
	MENU/CANCEL	YES	Process menu re-displayed or control passed to nominated command. Mode remains unchanged.
	MESSAGES	YES	Messages displayed, then current screen re-displayed. Mode remains unchanged.
	PROMPT	YES	Prompt request processed, then current screen re-displayed. Mode remains unchanged.
	ADD	NO	Not enabled when screen is in *CHANGE mode.
	CHANGE	NO	Enabled only when screen is in *CHANGE mode.
	DELETE	NO	Not enabled when screen is in *CHANGE mode.
*ADD	EXIT/SYSTEM	YES	Function ends or control is passed to nominated command. Mode remains unchanged.
	MENU/CANCEL	YES	Process menu re-displayed or control passed to nominated command. Mode remains unchanged.
	MESSAGES	YES	Messages displayed, then current screen re-displayed. Mode remains unchanged.
	PROMPT	YES	Prompt request processed, then current screen re-displayed. Mode remains unchanged.
	ADD	NO	Enabled only when screen is in *ADD mode.
	CHANGE DELETE	NO NO	These keys are not enabled when screen is in *ADD mode.
*DELETE	EXIT	YES	Function ends or control passed to nominated command. Mode remains unchanged.
	MENU	YES	Process menu re-displayed or control passed to nominated command. Mode remains unchanged.
	MESSAGES	YES	Messages displayed, then current screen re-displayed. Mode remains unchanged.
	PROMPT	YES	Prompt request processed, then current screen re-displayed. Mode remains unchanged.
	ADD CHANGE	NO NO	These keys are not enabled when screen is in *DELETE mode.
	DELETE	NO