```
public interface IVSFocusHandler
```
An interface used for advanced processing of focus mappings when the standard engines cannot be used. Typically, it is used to map VirtualSpace to the UI or vice versa. This class is instantiated when the VirtualSpace is virtualized for each application session.
Author:
Christopher Mindus

Field Summary

Fields
Modifier and Type	Field	Description
`static int`	`ENGINE_NAME`	The engine by plug-in name, e.g.
`static int`	`ENGINE_UI`	The engine: UI.
`static int`	`ENGINE_VS`	The engine: VirtualSpace.
`static IFocusComp`	`NO_CHANGE`	The focus component to return when no change of focus is requested.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`IFocusComp`	`processFocusMapping(IAppSessionGyro appGyro, IClientSessionGyro clientGyro, int destination, IFocusComp focusComp, int source, IFocusComp currentFocus)`	Called to return the component to focus.

- Field Detail
  - ENGINE_NAME
```
static final int ENGINE_NAME
```
    The engine by plug-in name, e.g. "com.iizix.term" for Terminal.
    See Also:
    Constant Field Values
  - ENGINE_VS
```
static final int ENGINE_VS
```
    The engine: VirtualSpace.
    See Also:
    Constant Field Values
  - ENGINE_UI
```
static final int ENGINE_UI
```
    The engine: UI.
    See Also:
    Constant Field Values
  - NO_CHANGE
```
static final IFocusComp NO_CHANGE
```
    The focus component to return when no change of focus is requested.
- Method Detail
  - processFocusMapping
```
IFocusComp processFocusMapping(IAppSessionGyro appGyro,
                               IClientSessionGyro clientGyro,
                               int destination,
                               IFocusComp focusComp,
                               int source,
                               IFocusComp currentFocus)
```
    Called to return the component to focus.
    Return null to let the default focus engines handle the mapping, NO_CHANGE to leave focus unchanged.
    Return value is an instance of a IFocusComp of the correct type:
    Any destination:
    null for default mapping engine processing,
    destination is ENGINE_UI:
    an instance of a UIComp that implements IUIFocusComp,
    destination is ENGINE_VS:
    an instance of a IVSComponent, i.e. one of VirtualSpace, VSField, VSAction, VSTable or VSGroup.
    Parameters:
    appGyro - The application session gyro.
    clientGyro - The client session gyro when it applies (could be null for e.g. Terminal).
    destination - The destination component type requested.
    focusComp - The component that received focus.
    source - The source component type provided in focusComp.
    currentFocus - The current focus component, null for none.
    Returns:
    The component to focus of the destination type, null for default processing, or NO_CHANGE to leave focus unchanged.

Interface IVSFocusHandler

Field Summary

Method Summary

Field Detail

ENGINE_NAME

ENGINE_VS

ENGINE_UI

NO_CHANGE

Method Detail

processFocusMapping