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Annotation of Examples/AppKit/Draw/graphicsUndo.subproj/MoveGraphicsChange.m, revision 1.1.1.1

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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