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/ NeXTSTEP 3.1 (Developer) [x86] / NeXT Step 3.1 Intel dev.cdr.dmg / NextDeveloper / Examples / AppKit / Draw / graphicsUndo.subproj / GroupGraphicsChange.m < prev    next >
Text File  |  1992-02-09  |  2KB  |  91 lines
  1. #import "drawundo.h"
  2.  
  3. @interface GroupGraphicsChange(PrivateMethods)
  4.  
  5. - undoDetails;
  6. - redoDetails;
  7.  
  8. @end
  9.  
  10. @implementation GroupGraphicsChange
  11.  
  12. - free
  13. {
  14.     if (![self hasBeenDone]) {
  15.         [[group subGraphics] empty];
  16.         [group free];
  17.     }
  18.     return [super free];
  19. }
  20.  
  21. - (const char *)changeName
  22. {
  23.     return NXLocalStringFromTable("Operations", "Group", NULL, "The operation of grouping a bunch of graphical entities together.");
  24. }
  25.  
  26. - saveBeforeChange
  27. {
  28.     [super saveBeforeChange];
  29.     [changeDetails makeObjectsPerform:@selector(recordGraphicPositionIn:) with:[graphicView graphics]];
  30.  
  31.     return self;
  32. }
  33.  
  34. - changeDetailClass
  35. {
  36.     return [OrderChangeDetail class];
  37. }
  38.  
  39. - noteGroup:aGroup
  40. {
  41.     group = aGroup;
  42.     return self;
  43. }
  44.  
  45. - undoDetails
  46. {
  47.     int count, i;
  48.     id detail, graphic;
  49.     List *allGraphics;
  50.  
  51.     allGraphics = [graphicView graphics];
  52.     [allGraphics removeObject:group];
  53.     count = [changeDetails count];
  54.     for (i = 0; i < count; i++) {
  55.     detail = [changeDetails objectAt:i];
  56.     graphic = [detail graphic];
  57.     [graphic setCacheable:YES];
  58.         [allGraphics insertObject:graphic at:[detail graphicPosition]];
  59.     }
  60.     [graphicView getSelection];
  61.     [graphicView resetGroupInSlist];
  62.     
  63.     return self;
  64. }
  65.  
  66. - redoDetails
  67. {
  68.     int count, i;
  69.     id detail, graphic;
  70.     List *selectedGraphics;
  71.     List *allGraphics;
  72.  
  73.     selectedGraphics = [graphicView selectedGraphics];
  74.     allGraphics = [graphicView graphics];
  75.     count = [changeDetails count];
  76.     for (i = 0; i < count; i++) {
  77.     detail = [changeDetails objectAt:i];
  78.     graphic = [detail graphic];
  79.     [graphic setCacheable:NO];
  80.         [selectedGraphics removeObject:graphic];
  81.         [allGraphics removeObject:graphic];
  82.     }
  83.     [allGraphics insertObject:group at:0];
  84.     [graphicView setGroupInSlist:YES];
  85.     [graphicView getSelection];
  86.  
  87.  
  88.     return self;
  89. }
  90.  
  91. @end