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

1.1     ! root        1: #import "drawundo.h"
        !             2: 
        !             3: @interface DeleteGraphicsChange(PrivateMethods)
        !             4: 
        !             5: - undoDetails;
        !             6: - redoDetails;
        !             7: 
        !             8: @end
        !             9: 
        !            10: @implementation DeleteGraphicsChange
        !            11: 
        !            12: - free
        !            13: {
        !            14:     if ([self hasBeenDone])
        !            15:         [graphics freeObjects];
        !            16:     return [super free];
        !            17: }
        !            18: 
        !            19: - (const char *)changeName
        !            20: {
        !            21:     return DELETE_OPERATION;
        !            22: }
        !            23: 
        !            24: - saveBeforeChange
        !            25: {
        !            26:     [super saveBeforeChange];
        !            27:     [changeDetails makeObjectsPerform:@selector(recordGraphicPositionIn:) with:[graphicView graphics]];
        !            28: 
        !            29:     return self;
        !            30: }
        !            31: 
        !            32: - undoDetails
        !            33: {
        !            34:     int count, i;
        !            35:     id detail, graphic;
        !            36:     List *allGraphics;
        !            37: 
        !            38:     count = [changeDetails count];
        !            39:     allGraphics = [graphicView graphics];
        !            40:     for (i = 0; i < count; i++) {
        !            41:        detail = [changeDetails objectAt:i];
        !            42:        graphic = [detail graphic];
        !            43:         [allGraphics insertObject:graphic at:[detail graphicPosition]];
        !            44:        [graphic wasAddedTo:graphicView];
        !            45:     }
        !            46:     [graphicView getSelection];
        !            47:        
        !            48:     return self;
        !            49: }
        !            50: 
        !            51: - redoDetails
        !            52: {
        !            53:     int count, i;
        !            54:     id detail, graphic;
        !            55:     List *selectedGraphics;
        !            56:     List *allGraphics;
        !            57: 
        !            58:     selectedGraphics = [graphicView selectedGraphics];
        !            59:     allGraphics = [graphicView graphics];
        !            60:     count = [changeDetails count];
        !            61:     for (i = 0; i < count; i++) {
        !            62:        detail = [changeDetails objectAt:i];
        !            63:        graphic = [detail graphic];
        !            64:         [selectedGraphics removeObject:graphic];
        !            65:         [allGraphics removeObject:graphic];
        !            66:        [graphic wasRemovedFrom:graphicView];
        !            67:     }
        !            68:     [graphicView resetGroupInSlist];
        !            69: 
        !            70:     return self;
        !            71: }
        !            72: 
        !            73: - changeDetailClass
        !            74: {
        !            75:     return [OrderChangeDetail class];
        !            76: }
        !            77: 
        !            78: @end

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