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Annotation of Examples/AppKit/Draw/graphicsUndo.subproj/MoveGraphicsChange.m, revision 1.1

1.1     ! root        1: #import "drawundo.h"
        !             2: 
        !             3: @interface MoveGraphicsChange(PrivateMethods)
        !             4: 
        !             5: - (BOOL)subsumeIdenticalChange:change;
        !             6: 
        !             7: @end
        !             8: 
        !             9: @implementation MoveGraphicsChange
        !            10: 
        !            11: - initGraphicView:aGraphicView vector:(const NXPoint *)aVector
        !            12: {
        !            13:     [super initGraphicView:aGraphicView];
        !            14:     redoVector.x = aVector->x;
        !            15:     redoVector.y = aVector->y;
        !            16:     undoVector.x = -redoVector.x;
        !            17:     undoVector.y = -redoVector.y;
        !            18: 
        !            19:     return self;
        !            20: }
        !            21: 
        !            22: - (const char *)changeName
        !            23: {
        !            24:     return NXLocalStringFromTable("Operations", "Move", NULL, "The operation of moving a graphical entity.");
        !            25: }
        !            26: 
        !            27: - changeDetailClass
        !            28: {
        !            29:     return [MoveChangeDetail class];
        !            30: }
        !            31: 
        !            32: - (const NXPoint *)undoVector
        !            33: {
        !            34:     return &undoVector;
        !            35: }
        !            36: 
        !            37: - (const NXPoint *)redoVector
        !            38: {
        !            39:     return &redoVector;
        !            40: }
        !            41: 
        !            42: - (BOOL)subsumeIdenticalChange:change
        !            43: {
        !            44:     MoveGraphicsChange *moveChange;
        !            45:     
        !            46:     moveChange = (MoveGraphicsChange *)change;
        !            47:     undoVector.x += moveChange->undoVector.x;
        !            48:     undoVector.y += moveChange->undoVector.y;
        !            49:     redoVector.x += moveChange->redoVector.x;
        !            50:     redoVector.y += moveChange->redoVector.y;
        !            51:     
        !            52:     return YES;
        !            53: }
        !            54: 
        !            55: @end

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