Return to QBE.h CVS log

Up to [NeXTSTEP 3.3 examples] / Examples / EnterpriseObjects / QueryByExample / QBEPalette

Annotation of Examples/EnterpriseObjects/QueryByExample/QBEPalette/QBE.h, revision 1.1.1.1

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: 

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.