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

1.1     ! root        1: #import "drawundo.h"
        !             2: 
        !             3: @implementation PerformTextGraphicsChange
        !             4: 
        !             5: static id editText = nil;
        !             6: static id editWindow = nil;
        !             7: 
        !             8: - initGraphic:aGraphic view:aGraphicView
        !             9: {
        !            10:     [super init];
        !            11: 
        !            12:     if (editText == nil) {
        !            13:        editText = [[UndoText alloc] initFrame:(NXRect *)0];
        !            14:        [editText setMonoFont:NO];
        !            15:     }
        !            16: 
        !            17:     if (editWindow == nil) {
        !            18:        editWindow = [[Window alloc] init];
        !            19:     }
        !            20: 
        !            21:     graphic = aGraphic;
        !            22:     graphicView = aGraphicView;
        !            23:     textChange = nil;
        !            24: 
        !            25:     return self;
        !            26: }
        !            27: 
        !            28: - free
        !            29: {
        !            30:     [textChange free];
        !            31:     return [super free];
        !            32: }
        !            33: 
        !            34: - (const char *)changeName
        !            35: {
        !            36:     return [textChange changeName];
        !            37: }
        !            38: 
        !            39: - undoChange
        !            40: {
        !            41:     NXRect bounds;
        !            42: 
        !            43:     [self loadGraphic];
        !            44:     [textChange undoChange];
        !            45:     [self unloadGraphic];
        !            46:     [graphic getBounds:&bounds];
        !            47:     [graphicView cache:&bounds];
        !            48:     [[graphicView window] flushWindow];
        !            49: 
        !            50:     return [super undoChange];
        !            51: }
        !            52: 
        !            53: - redoChange
        !            54: {
        !            55:     NXRect bounds;
        !            56: 
        !            57:     [self loadGraphic];
        !            58:     [textChange redoChange];
        !            59:     [self unloadGraphic];
        !            60:     [graphic getBounds:&bounds];
        !            61:     [graphicView cache:&bounds];
        !            62:     [[graphicView window] flushWindow];
        !            63: 
        !            64:     return [super redoChange];
        !            65: }
        !            66: 
        !            67: - (BOOL)incorporateChange:aChange
        !            68: {
        !            69:     if (textChange == nil) {
        !            70:        textChange = aChange;
        !            71:        return YES;
        !            72:     } else {
        !            73:        return NO;
        !            74:     }
        !            75: }
        !            76: 
        !            77: - loadGraphic
        !            78: {
        !            79:     NXRect graphicBounds;
        !            80: 
        !            81:     stream = NXOpenMemory([graphic data], [graphic length], NX_READONLY);
        !            82:     [editText readRichText:stream];
        !            83:     NXCloseMemory(stream, NX_SAVEBUFFER);
        !            84: 
        !            85:     [graphic getBounds:&graphicBounds];
        !            86:     [editText setFrame:&graphicBounds];
        !            87: 
        !            88:     [editWindow setNextResponder:graphicView]; /* so changes can find our */
        !            89:                                                /* change manager          */
        !            90:     [[editWindow contentView] addSubview:editText];
        !            91: 
        !            92:     [editText selectAll:self];
        !            93: 
        !            94:     return self;
        !            95: }
        !            96: 
        !            97: - unloadGraphic
        !            98: {
        !            99:     int length, maxlen;
        !           100:     char *buffer, *data;
        !           101: 
        !           102:     [editWindow setNextResponder:nil];
        !           103:     [editText removeFromSuperview];
        !           104:     [editText setSel:0 :0];
        !           105:     [graphic setFont:[editText font]];
        !           106: 
        !           107:     stream = NXOpenMemory(NULL, 0, NX_WRITEONLY);
        !           108:     [editText writeRichText:stream];
        !           109:     NXGetMemoryBuffer(stream, &buffer, &length, &maxlen);
        !           110:     NX_ZONEMALLOC([graphic zone], data, char, length);
        !           111:     bcopy(buffer, data, length);
        !           112:     NXCloseMemory(stream, NX_FREEBUFFER);
        !           113: 
        !           114:     [graphic setData:data];
        !           115:     [graphic setLength:length];
        !           116: 
        !           117:     return self;
        !           118: }
        !           119: 
        !           120: - editText
        !           121: {
        !           122:     return editText;
        !           123: }
        !           124: 
        !           125: @end

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