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Annotation of Examples/IndexingKit/QueryFieldEditor/README.rtf, revision 1.1

1.1     ! root        1: {\rtf0\ansi{\fonttbl\f0\fswiss Helvetica;\f1\fmodern Ohlfs;}
        !             2: \paperw13040
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        !             4: \margl120
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        !             6: \pard\tx1140\tx2300\tx3440\tx4600\tx5760\tx6900\tx8060\tx9200\tx10360\tx11520\f0\b\i0\ulnone\fs36\fc0\cf0 QueryFieldEditor
        !             7: \b0\fs28 \
        !             8: by Adam Hertz\
        !             9: \
        !            10: This example is a field editor that does escape completion against any IXBTree cursor.  It is used by Webster, Librarian and the ToDoList example.  Attach it to a TextField, and when the user types Esc, it completes the prefix using an IXBTree's key space as the set of possible completions.\
        !            11: \
        !            12: It behaves like (and was inspired by) the escape completion in Edit: it cycles through all possible completions for a given prefix.  Attach it to a TextField by implementing the Window delegate's - windowWillReturnFieldEditor:toObject: delegate method.  Arm it with any IXBTree cursor, such as an IXBTreeCursor or an IXPostingCursor, and away you go.\
        !            13: \
        !            14: The interface and implementation files for this example, QueryFieldEditor.h and QueryFieldEditor.m, are included in the ToDoList example.\
        !            15: \
        !            16: The following code sample shows how the Window delegate manages the QueryFieldEditor:\
        !            17: \
        !            18: 
        !            19: \fs24 #import <btree/IXBTreeCursor.h>\
        !            20: \
        !            21: // This window delegate method sets the field editor for the TextField in the instance \
        !            22: // variable queryField from the instance variable fieldEditor. The first time through, it \
        !            23: // creates the field editor and loads it with a cursor from the instance variable cursor\
        !            24: \
        !            25: - windowWillReturnFieldEditor:sender toObject:client\
        !            26: \{     \
        !            27:     if (client != queryField) return nil;\
        !            28:     if (fieldEditor == nil)\
        !            29:     \{\
        !            30:        fieldEditor = [[QueryFieldEditor alloc] init];\
        !            31:        [fieldEditor setCursor:cursor];\
        !            32:     \}\
        !            33: \
        !            34:     return fieldEditor;\
        !            35: \}\
        !            36: 
        !            37: }

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