GOUndo

Synopsis

GType               go_undo_binary_get_type             (void);
GOUndo *            go_undo_binary_new                  (gpointer a,
                                                         gpointer b,
                                                         GOUndoBinaryFunc undo,
                                                         GFreeFunc fa,
                                                         GFreeFunc fb);
GOUndo *            go_undo_combine                     (GOUndo *a,
                                                         GOUndo *b);
GType               go_undo_get_type                    (void);
void                go_undo_group_add                   (GOUndoGroup *g,
                                                         GOUndo *u);
GType               go_undo_group_get_type              (void);
GOUndoGroup *       go_undo_group_new                   (void);
GType               go_undo_unary_get_type              (void);
GOUndo *            go_undo_unary_new                   (gpointer a,
                                                         GOUndoUnaryFunc undo,
                                                         GFreeFunc fa);
void                go_undo_undo                        (GOUndo *u);
void                go_undo_undo_with_data              (GOUndo *u,
                                                         gpointer data);

Description

Details

go_undo_binary_get_type ()

GType               go_undo_binary_get_type             (void);

Returns :

go_undo_binary_new ()

GOUndo *            go_undo_binary_new                  (gpointer a,
                                                         gpointer b,
                                                         GOUndoBinaryFunc undo,
                                                         GFreeFunc fa,
                                                         GFreeFunc fb);

This function creates a new undo object for undo operations of two arguments. (In addition, an undo-time argument is added for context.)

`a` :	first argument for undo operation
`b` :	second argument for undo operation
`undo` :	function to call with arguments `a` and `b` for undo.
`fa` :	optional function to free `a`.
`fb` :	optional function to free `b`.
Returns :	a new undo object.

go_undo_combine ()

GOUndo *            go_undo_combine                     (GOUndo *a,
                                                         GOUndo *b);

This function takes ownership of the argument references and gives ownership of the result to the caller. Either argument may be NULL in which case the other is returned.

`a` :	optional first undo operation
`b` :	optional last undo operation
Returns :	the combination of two undo operations.

go_undo_get_type ()

GType               go_undo_get_type                    (void);

Returns :

go_undo_group_add ()

void                go_undo_group_add                   (GOUndoGroup *g,
                                                         GOUndo *u);

This function adds u to g.

`g` :	undo group
`u` :	undo object

go_undo_group_get_type ()

GType               go_undo_group_get_type              (void);

Returns :

go_undo_group_new ()

GOUndoGroup *       go_undo_group_new                   (void);

This function creates a new undo group for compounding undo objects.

Returns :

a new, empty undo group.

go_undo_unary_get_type ()

GType               go_undo_unary_get_type              (void);

Returns :

go_undo_unary_new ()

GOUndo *            go_undo_unary_new                   (gpointer a,
                                                         GOUndoUnaryFunc undo,
                                                         GFreeFunc fa);

This function creates a new undo object for undo operations of one argument. (In addition, an undo-time argument is added for context.)

`a` :	argument for undo operation
`undo` :	function to call with argument `a` for undo.
`fa` :	optional function to free `a`.
Returns :	a new undo object.

go_undo_undo ()

void                go_undo_undo                        (GOUndo *u);

Execute the stored undo operation.

u :

undo object

go_undo_undo_with_data ()

void                go_undo_undo_with_data              (GOUndo *u,
                                                         gpointer data);

Execute the stored undo operation. data is supplied to the undo operation as an extra argument. It is meant not to affect the undo operation in any way, but rather supply a context through which progress and errors can be reported.

`u` :	undo object
`data` :	user data

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