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Annotation of Examples/AppKit/Draw/undo.subproj/ChangeManager.h, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Please refer to external reference pages for complete
                      3:  * documentation on using the ChangeManager class.
                      4:  */
                      5: 
                      6: @interface ChangeManager : Responder
                      7: {
                      8:     List *_changeList;                 /* done, undone and redone changes */
                      9:     Change *_lastChange;               /* the last done or redone change */
                     10:     Change *_nextChange;               /* the most recently undone change */
                     11:     Change *_changeInProgress;         /* the current change in progress */
                     12:     int _numberOfDoneChanges;          /* number of done or redone changes 
                     13:                                           recorded in the changeList */
                     14:     int _numberOfUndoneChanges;                /* undone changes in the changeList */
                     15:     int _numberOfDoneChangesAtLastClean;/* number at time clean last message */
                     16:     BOOL _someChangesForgotten;                /* YES whenever we don't remember 
                     17:                                           enough to return to a clean state */
                     18:     int _changesDisabled;              /* YES between outermost calls to
                     19:                                           disableChanges: and enableChanges:*/
                     20: }
                     21: 
                     22: /* Methods called directly by your code */
                     23: 
                     24: - init;                        /* start with [super init] if overriding */
                     25: - free;                        /* end with [super free] if overriding */
                     26: - (BOOL)canUndo;       /* DO NOT override */
                     27: - (BOOL)canRedo;       /* DO NOT override */
                     28: - (BOOL)isDirty;       /* DO NOT override */
                     29: 
                     30: - dirty:sender;                /* start with [super dirty:sender] if overriding */
                     31: - clean:sender;                /* start with [super clean:sender] if overriding */
                     32: - reset:sender;                /* start with [super reset:sender] if overriding */
                     33: - disableChanges:sender;       /* DO NOT override */
                     34: - enableChanges:sender;                /* DO NOT override */
                     35: - undoOrRedoChange:sender;     /* DO NOT override */
                     36: - undoChange:sender;           /* DO NOT override */
                     37: - redoChange:sender;           /* DO NOT override */
                     38: - (BOOL)validateCommand:sender;
                     39:                        /* end with [super validateCommand:] if overriding */
                     40: 
                     41: /* Methods called by Change           */
                     42: /* DO NOT call these methods directly */
                     43: 
                     44: - changeInProgress:change;     /* DO NOT override */
                     45: - changeComplete:change;       /* DO NOT override */
                     46: 
                     47: /* Methods called by ChangeManager    */
                     48: /* DO NOT call these methods directly */
                     49: 
                     50: - changeWasDone;               /* override at will */
                     51: - changeWasUndone;             /* override at will */
                     52: - changeWasRedone;             /* override at will */
                     53: 
                     54: @end

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