Extending Ready-Made Applications

Understanding the SAS/EIS Flow of Control

In order to extend and customize SAS/EIS objects, you need to understand the SAS/EIS flow of control.

In SAS/EIS software, the following objects use the EMDDB_M data model. Hence they all use the same flow of control.

3D Business Graphs
Bubble Charts
Graphical Variance Reports
Maps
Multidimensional Business Trends
Multidimensional Charts
Multidimensional Pie Charts
Multidimensional Reports
Organizational Charts.

The EMDDB_M Data Model class combines the functionality of the MDDB_M class with the information that is stored in a SAS/EIS repository. It enables navigation of the defined data hierarchies, drill down, reach-through, subsetting, and report modifications "on the fly." The EMDDB_M Data Model provides viewers with common run-time features and allows viewers to share the same subset of data with little effort.

A flow chart for the Flow of Control (the order of execution) for objects that use the EMDDB_M data model is provided below. The order of execution does not necessarily imply that one method is calling another method.

This flow chart summarizes the set of methods that are executed at initialization and used to process user requests. The methods and their parameters are documented in the SAS/EIS online Help.

SAS/EIS Software Flow of Control

[SAS/EIS Software Flow of Control]

The following table provides information about methods that run automatically at run time. For more information about these methods, refer to the SAS/EIS online Help.

Method	Class	Description	Calls
_init	Viewer	performs the initial processing of the viewer.	_initialSetup
_initialSetup	Viewer	performs the steps that are necessary for initializing the viewer.	_viewerInitialSetup
_viewerInitialSetup	Viewer	performs the steps that are necessary for initializing the viewer.	_getModel
_getModel	ModelMgr	returns a list of model instances that are associated with the instance of EMDDB_C class.	_init
_init	Model	performs the initial processing of the model.
_postInit	Viewer	performs additional processing after the object's _init method runs.	_setup
_setup	Viewer	performs additional steps for the initial display of the viewer.	_viewerSetup, _refresh, _setCustom
_viewerSetup	Viewer	performs additional steps for the initial display of the viewer.	_attach _setApplication
_attach	Viewer	associates the specified data model with the viewer.
_setApplication	Model	accepts the application list, retrieves the information needed by the model, and creates the initial data table.
_refresh	Viewer	sets viewer attributes (if any), refreshes the viewer, and controls the graying and ungraying of pull-down menu items and tool bar items.	_setViewerAttr
_setViewerAttr	Viewer	performs additional processing before the viewer is redrawn.
_setCustom	Viewer	handles viewer-specific customizations.	_viewerSetCustom
_viewerSetCustom	Viewer	handles viewer-specific customizations.
_objectLabel	Viewer	determines the type and location of the user's selection (single click, double click, or pop-up menu), then takes appropriate action.	_setActiveValue _viewerObjectLabel
_setActiveValue	Model	identifies the active cell in the data table.
_viewerObjectLabel	Viewer	determines the type and location of the user's selection (single click, double click, or pop-up menu), then takes appropriate action.	_getActions
_getActions	Viewer	processes the pop-up menu items.	_viewerGetActions
_viewerGetActions	Viewer	processes the pop-up menu items.
_execCmd	Viewer	handles the execution of commands that are issued from the pull-down menu.
_term	Viewer	deletes the viewer.	_viewerTerm
_viewerTerm	Viewer	deletes the viewer.	_detach _deleteModel
_detach	Viewer	disassociates the currently attached data model.
_deleteModel	ModelMgr	deletes the indicated instance from the list of linked models.	_term

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