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

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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