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Annotation of Examples/EnterpriseObjects/QueryByExample/QBEPalette/SortOrderSetter.m, revision 1.1

1.1     ! root        1: // SortOrderSetter.m
        !             2: 
        !             3: #import <eointerface/eointerface.h>
        !             4: #import "SortOrderSetter.h"
        !             5: #import "TableMagic.h"
        !             6: 
        !             7: @implementation SortOrderSetter
        !             8: - (NSArray *)orderingArrayForEntity:(EOEntity *)entity keys:(NSArray *)keys
        !             9:                  ordering:(EOOrdering)ordering
        !            10: {
        !            11:     int count, i;
        !            12:     NSMutableArray *orderarray;
        !            13:     
        !            14:     count = [keys count];
        !            15:     orderarray = [NSMutableArray arrayWithCapacity:count];
        !            16:     
        !            17:     for(i=0; i<count; i++) {
        !            18:         EOAttribute *attr = [entity attributeNamed:[keys objectAtIndex:i]];
        !            19:         if (attr)
        !            20:             [orderarray addObject: [EOAttributeOrdering attributeOrderingWithAttribute:attr
        !            21:                ordering:ordering]];
        !            22:     }
        !            23:     return orderarray;
        !            24: }
        !            25: 
        !            26: - applyOrderingToDataSourceAndFetch:(EOOrdering)ordering
        !            27: {
        !            28:     id tableView = [NXTableView keyTableView];
        !            29:     EOController *controller = [tableView eoController];
        !            30:     id dataSource = [controller dataSource];
        !            31:     if (controller && [dataSource respondsToSelector:@selector(setFetchOrder:)]) {
        !            32:         NSArray *keys = [tableView associationKeysForSelectedColumns];
        !            33:         if (!keys) // if none selected, sort by first
        !            34:             keys = [NSArray arrayWithObject:[tableView associationKeyForColumn:0]];
        !            35:         [dataSource setFetchOrder:[self orderingArrayForEntity:[dataSource entity] keys:keys ordering:ordering]];
        !            36: 
        !            37:         // nil out the fetch order on the controller (since it will override this one)
        !            38:         [controller setSortOrdering:nil];
        !            39:         
        !            40:         [controller fetch:nil];
        !            41:         return self;
        !            42:     }
        !            43:     
        !            44:     NXBeep();
        !            45:     return nil;
        !            46: }
        !            47: 
        !            48: - sortDataSourceAscending:sender
        !            49: {
        !            50:     return [self applyOrderingToDataSourceAndFetch:EOAscendingOrder];
        !            51: }
        !            52: 
        !            53: - sortDataSourceDescending:sender
        !            54: {
        !            55:     return [self applyOrderingToDataSourceAndFetch:EODescendingOrder];
        !            56: }
        !            57: 
        !            58: - (NSArray *)keyOrderingForKeys:(NSArray *)keys ordering:(NSComparisonResult)ordering
        !            59: {
        !            60:     int i, count = [keys count];
        !            61:     NSMutableArray *result = [NSMutableArray arrayWithCapacity:count];
        !            62:     for(i=0; i<count; i++) {
        !            63:         [result addObject:[EOKeySortOrdering keyOrderingWithKey:[keys objectAtIndex:i] ordering:ordering]];
        !            64:     }
        !            65:     return result;
        !            66: }
        !            67: 
        !            68: - applyOrderingToControllerAndFetch:(NSComparisonResult)ordering
        !            69: {
        !            70:     id tableView = [NXTableView keyTableView];
        !            71:     EOController *controller = [tableView eoController];
        !            72:     if (controller) {
        !            73:         NSArray *keys = [tableView associationKeysForSelectedColumns];
        !            74:         if (!keys) // if none selected, sort by first
        !            75:             keys = [NSArray arrayWithObject:[tableView associationKeyForColumn:0]];
        !            76:         [controller setSortOrdering:[self keyOrderingForKeys:keys ordering:ordering]];
        !            77:         [controller resort];
        !            78: 
        !            79:         if ([[controller dataSource] respondsToSelector:@selector(setFetchOrder:)]) {
        !            80:             // unset the fetch order on the dataSource
        !            81:             [(EODatabaseDataSource *)[controller dataSource] setFetchOrder:nil];
        !            82:         }
        !            83:         return self;
        !            84:     }
        !            85: 
        !            86:     NXBeep();
        !            87:     return nil;
        !            88:     
        !            89: }
        !            90: 
        !            91: - sortControllerAscending:sender
        !            92: {
        !            93:     return [self applyOrderingToControllerAndFetch:NSOrderedAscending];
        !            94: }
        !            95: 
        !            96: - sortControllerDescending:sender
        !            97: {
        !            98:     return [self applyOrderingToControllerAndFetch:NSOrderedDescending];
        !            99: }
        !           100: 
        !           101: 
        !           102: // switch old style methods to use controller sorting
        !           103: - setOrderAscending:sender
        !           104: {
        !           105:     return [self sortControllerAscending:sender];
        !           106: }
        !           107: 
        !           108: - setOrderDescending:sender
        !           109: {
        !           110:     return [self sortControllerDescending:sender];
        !           111: }
        !           112: @end

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