Class: TReplaceDataCommand

Declaration: CompoundDocumentCommand.h

Taxonomy Categories:

Member Functions:

Interface Category:

API.

Inherits From:

TCommandRequiringDataFixup

Inherited By:

TPullDataCommand TPushDataCommand

Purpose:

This command replaces selected data with new data contained in a model. The command supports undo and redo.

Instantiation:

Allocate on the heap or the stack.

Deriving Classes:

No special requirements.

Concurrency:

Not multithread safe.

Resource Use:

No special requirements.

Invariants:

Assert (GetModel() != NIL)

Member Function: TReplaceDataCommand::TReplaceDataCommand

TReplaceDataCommand (TModel * modelToAdopt)
TReplaceDataCommand (const TReplaceDataCommand &)
TReplaceDataCommand ()

Interface Category:

API.

Purpose:

Constructs a command with model to use to replace data.
Copy constructor.
Default constructor.

Calling Context:

Construct command data to be absorbed into target.
Called to copy an object.
Called by the stream-in operators.

Parameters:

TModel * modelToAdopt -The model to adopt to be used to replace data.
const TReplaceDataCommand & -The command to copy.
Takes no parameters.

Return Value:

None.

Exceptions:

Throws no exceptions, passes all exceptions through.

Concurrency:

Not multithread safe.

Other Considerations:

None.

Member Function: TReplaceDataCommand::operator=

TReplaceDataCommand & operator =(const TReplaceDataCommand &)

Interface Category:

API.

Purpose:

Assignment operator.

Calling Context:

Called when an object is assigned to another compatible object.

Parameters:

const TReplaceDataCommand & -The right-hand side object.

Return Value:

Returns a const reference to the left-hand side object.

Exceptions:

Throws no exceptions, passes all exceptions through.

Concurrency:

Not multithread safe.

Other Considerations:

None.

Member Function: TReplaceDataCommand::~TReplaceDataCommand

virtual ~ TReplaceDataCommand ()

Interface Category:

API.

Purpose:

Destructor.

Calling Context:

Called to destroy an object.

Parameters:

Takes no parameters.

Return Value:

None.

Exceptions:

Throws no exceptions, passes all exceptions through.

Concurrency:

Not multithread safe.

Other Considerations:

None.

Member Function: TReplaceDataCommand::operator>>=

virtual TStream & operator >>=(TStream &) const

Interface Category:

API.

Purpose:

Stream-out operator.

Calling Context:

Called to stream out data.

Parameters:

TStream & -The stream to which the object streams itself out.

Return Value:

Returns a reference to the stream the object streams itself out to.

Exceptions:

Throws no exceptions, passes all exceptions through.

Concurrency:

Not multithread safe.

Other Considerations:

None.

Member Function: TReplaceDataCommand::operator<<=

virtual TStream & operator <<= (TStream &)

Interface Category:

API.

Purpose:

Stream-in operator.

Calling Context:

Called to stream in data.

Parameters:

TStream & -The stream from which the object streams itself in.

Return Value:

Returns a reference to the stream the object streams itself in from.

Exceptions:

Throws a TInvalidVersionError if the version of the object on the stream is unknown to the version of the shared library installed.

Concurrency:

Not multithread safe.

Other Considerations:

None.

Member Function: TReplaceDataCommand::HandleDoBegin

virtual void HandleDoBegin (MDataExchanger &)

Interface Category:

API.

Purpose:

Replaces the data selected by the target selection with the model in this command.

Calling Context:

Called by TCommandOn.

Parameters:

MDataExchanger & -The target selection used for the replace data. The command calls ReplaceData on the selection.

Return Value:

None.

Exceptions:

Throws no exceptions, passes all exceptions through.

Concurrency:

Not multithread safe.

Other Considerations:

This function is protected.

Member Function: TReplaceDataCommand::HandleUndo

virtual void HandleUndo (MDataExchanger &)

Interface Category:

API.

Purpose:

Undoes the replacement of data in the selection. The data returned from the replace is passed back to the selection for undo.

Calling Context:

Called by TCommandOn.

Parameters:

MDataExchanger & -The target selection used to undo the replace. The command calls UndoReplaceData with the model returned from the previous call to ReplaceData.

Return Value:

None.

Exceptions:

Throws no exceptions, passes all exceptions through.

Concurrency:

Not multithread safe.

Other Considerations:

This function is protected.

Member Function: TReplaceDataCommand::HandleRedo

virtual void HandleRedo (MDataExchanger &)

Interface Category:

API.

Purpose:

Redoes the command. The data returned from the previous undo replace is passed back to the selection for redo.

Calling Context:

Called by TCommandOn.

Parameters:

MDataExchanger & -The target selection used to redo the replace. The command calls RedoReplaceData with the model returned from the previous call to UndoReplaceData.

Return Value:

None.

Exceptions:

Throws no exceptions, passes all exceptions through.

Concurrency:

Not multithread safe.

Other Considerations:

This function is protected.

Member Function: TReplaceDataCommand::HandleCommitDone

virtual void HandleCommitDone ()

Interface Category:

API.

Purpose:

Commits the command to a done state. The storage for the model owned by the command is deleted because the model will never be used again.

Calling Context:

Called by TCommandOn.

Parameters:

Takes no parameters.

Return Value:

None.

Exceptions:

Throws no exceptions, passes all exceptions through.

Concurrency:

Not multithread safe.

Other Considerations:

None.

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