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Annotation of Examples/EnterpriseObjects/QueryByExample/QBEPalette/QBE.h, revision 1.1

1.1     ! root        1: /* QBE.h:
        !             2:  * You may freely copy, distribute, and reuse the code in this example.
        !             3:  * NeXT disclaims any warranty of any kind, expressed or  implied, as to its
        !             4:  * fitness for any particular use.
        !             5:  *
        !             6:  * Written by Craig Federighi
        !             7:  *  
        !             8:  *
        !             9:  * Example of a Query By Example object: Connects to an EOController for an
        !            10:  * easy contruction of qualifiers from data entered into fields of an 
        !            11:  * existing user interface.
        !            12:  */
        !            13: 
        !            14: #import <appkit/appkit.h>
        !            15: #import <eointerface/eointerface.h>
        !            16: #import <apps/InterfaceBuilder.h>
        !            17: 
        !            18: @interface QBE:Object 
        !            19: {
        !            20:     EOController *controller;
        !            21:     EODatabaseDataSource *realsource;
        !            22: 
        !            23:     NSMutableArray *removedAssociations;
        !            24:     EOController *nextController;
        !            25:     id controllersDelegate;
        !            26:     NSMutableArray *wereUneditableAssoc;
        !            27:     NSMutableArray *wereEditableAssoc;
        !            28:     
        !            29:     EOQualifier *originalQualifier;
        !            30: }
        !            31: 
        !            32: - enterQueryMode:sender;
        !            33:     // switches controller from displaying database
        !            34:     // data to displaying a blank row in which query info can be entered.
        !            35:     // Sending this message when already in Query mode will add a new row to
        !            36:     // the controller to allow entry of another disjoined qualifier.
        !            37: 
        !            38: - toggleQueryFetch:sender;
        !            39:     // if not in query mode, enters query mode.  If in query mode, does
        !            40:     // applyQualifier (and exits query mode)
        !            41:     
        !            42: - applyQualifier:sender;
        !            43:     // constructs a qualifier with ANDing within columns and ORing rows
        !            44:     // Sets the qualifier in the datasource and issues a fetch on the
        !            45:     // controller.
        !            46:      
        !            47: - applyDisjointQualifier:sender;
        !            48:     // like applyQualifier, but ORs within columns
        !            49:     
        !            50: - exitQueryMode:sender;
        !            51:     // reverts to original qualifier and fetches.
        !            52: 
        !            53: - addQuery:sender;
        !            54:     // add a line to the query controller and select it  
        !            55: 
        !            56: @end
        !            57: 

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