[34] | 1 | //
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| 2 | // NJRTableDelegate.m
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| 3 | // Pester
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| 4 | //
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| 5 | // Created by Nicholas Riley on Sun Oct 27 2002.
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| 6 | // Copyright (c) 2002 __MyCompanyName__. All rights reserved.
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| 7 | //
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| 8 |
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| 9 | #import "NJRTableDelegate.h"
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| 10 | #import "NSTableView-NJRExtensions.h"
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| 11 |
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| 12 | #pragma mark sorting support
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| 13 |
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| 14 | typedef struct { NSString *key; BOOL descending; } SortContext;
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| 15 |
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| 16 | // Sort array of itemNums, by looking up the itemNum in the dictionary of dictionaries.
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| 17 | // based on code of Ondra Cada <ocs@ocs.cz> on cocoa-dev list
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| 18 |
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| 19 | int ORDER_BY_CONTEXT(id left, id right, void *ctxt) {
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| 20 | SortContext *context = (SortContext *)ctxt;
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| 21 | int order = 0;
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| 22 | id key = context->key;
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| 23 | if (0 != key) {
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| 24 | id first, second; // the actual objects to compare
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| 25 |
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| 26 | if (context->descending) {
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| 27 | first = [right objectForKey: key];
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| 28 | second = [left objectForKey: key];
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| 29 | } else {
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| 30 | first = [left objectForKey: key];
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| 31 | second = [right objectForKey: key];
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| 32 | }
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| 33 |
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| 34 | if ([first respondsToSelector: @selector(caseInsensitiveCompare:)]) {
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| 35 | order = [first caseInsensitiveCompare:second];
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| 36 | } else { // sort numbers or dates
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| 37 | order = [(NSNumber *)first compare:second];
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| 38 | }
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| 39 | }
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| 40 | return order;
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| 41 | }
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| 42 |
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| 43 | @implementation NJRTableDelegate
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| 44 |
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| 45 | #pragma mark initialize-release
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| 46 |
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| 47 | - (void)dealloc
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| 48 | {
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| 49 | [sortingColumn release];
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| 50 | [sortingKey release];
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| 51 | [super dealloc];
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| 52 | }
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| 53 |
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| 54 | #pragma mark accessing
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| 55 |
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| 56 | - (void)setSortingColumn:(NSTableColumn *)inNewValue;
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| 57 | {
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| 58 | [inNewValue retain];
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| 59 | [sortingColumn release];
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| 60 | sortingColumn = inNewValue;
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| 61 | }
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| 62 |
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| 63 | - (void)setSortingKey:(NSString *)inNewValue;
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| 64 | {
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| 65 | [inNewValue retain];
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| 66 | [sortingKey release];
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| 67 | sortingKey = inNewValue;
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| 68 | }
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| 69 |
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| 70 | #pragma mark saving/restoring selection
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| 71 |
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| 72 | - (NSSet *)selectedItems;
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| 73 | {
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| 74 | NSMutableSet *result = [NSMutableSet set];
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| 75 | NSEnumerator *e = [tableView selectedRowEnumerator];
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| 76 | NSNumber *rowNum;
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| 77 |
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| 78 | while ( (rowNum = [e nextObject]) != nil) {
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| 79 | id item = [oData objectAtIndex: [rowNum intValue]];
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| 80 | [result addObject: item];
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| 81 | }
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| 82 | return result;
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| 83 | }
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| 84 |
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| 85 | - (void)selectItems:(NSSet *)inSelectedItems;
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| 86 | {
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| 87 | NSEnumerator *e = [inSelectedItems objectEnumerator];
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| 88 | id item;
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| 89 | int savedLastRow = 0;
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| 90 |
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| 91 | [tableView deselectAll: nil];
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| 92 |
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| 93 | while ( (item = [e nextObject]) != nil ) {
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| 94 | int row = [oData indexOfObjectIdenticalTo: item];
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| 95 | if (row != NSNotFound) {
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| 96 | [tableView selectRow: row byExtendingSelection: YES];
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| 97 | savedLastRow = row;
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| 98 | }
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| 99 | }
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| 100 | [tableView scrollRowToVisible: savedLastRow];
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| 101 | }
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| 102 |
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| 103 | // ----------------------------------------------------------------------------------------
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| 104 | // Sorting
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| 105 | // ----------------------------------------------------------------------------------------
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| 106 |
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| 107 | - (void)sortData
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| 108 | {
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| 109 | SortContext ctxt = { sortingKey, sortDescending };
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| 110 | NSSet *oldSelection = [self selectedItems];
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| 111 |
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| 112 | // sort the NSMutableArray
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| 113 | [oData sortUsingFunction: ORDER_BY_CONTEXT context: &ctxt];
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| 114 |
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| 115 | [tableView reloadData];
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| 116 | [self selectItems: oldSelection];
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| 117 | }
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| 118 |
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| 119 | - (void)sortByColumn:(NSTableColumn *)inTableColumn;
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| 120 | {
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| 121 | if (sortingColumn == inTableColumn) {
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| 122 | // User clicked same column, change sort order
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| 123 | sortDescending = !sortDescending;
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| 124 | // Possible optimization: Don't actually re-sort if you just change the sorting direction;
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| 125 | // instead, just display either the nth item or the (count-1-n)th item depending on ascending/descending.)
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| 126 | } else {
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| 127 | // User clicked new column, change old/new column headers,
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| 128 | // save new sorting column, and re-sort the array.
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| 129 | sortDescending = NO;
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| 130 | if (nil != sortingColumn) {
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| 131 | [tableView setIndicatorImage: nil inTableColumn: sortingColumn];
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| 132 | }
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| 133 | [self setSortingKey: [inTableColumn identifier]];
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| 134 | [self setSortingColumn: inTableColumn];
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| 135 | [tableView setHighlightedTableColumn: inTableColumn];
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| 136 | }
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| 137 | [tableView setIndicatorImage: (sortDescending ? [NSTableView descendingSortIndicator] : [NSTableView ascendingSortIndicator]) inTableColumn: inTableColumn];
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| 138 | // Actually sort the data
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| 139 | [self sortData];
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| 140 | }
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| 141 |
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| 142 | // Sort by whatever column was clicked upon
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| 143 | - (void)tableView:(NSTableView*)aTableView didClickTableColumn:(NSTableColumn *)inTableColumn
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| 144 | {
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| 145 | [[tableView window] makeFirstResponder: aTableView]; // help make this tableView be first responder
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| 146 | [self sortByColumn:inTableColumn];
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| 147 | }
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| 148 |
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| 149 | // ----------------------------------------------------------------------------------------
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| 150 | // Alphabetic Type Ahead
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| 151 | // ----------------------------------------------------------------------------------------
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| 152 |
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| 153 | - (void) typeAheadString:(NSString *)inString;
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| 154 | {
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| 155 | // This general sample looks for a highlighted column, presuming that is that column we are sorted by, and uses that as the lookup key.
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| 156 | NSTableColumn *col = [tableView highlightedTableColumn];
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| 157 | if (nil != col) {
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| 158 | NSString *key = [col identifier];
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| 159 | int i;
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| 160 | for ( i = 0 ; i < [oData count] ; i++ ) {
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| 161 | NSDictionary *rowDict = [oData objectAtIndex:i];
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| 162 | NSString *compareTo = [rowDict objectForKey:key];
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| 163 | NSComparisonResult order = [inString caseInsensitiveCompare:compareTo];
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| 164 | if (order != NSOrderedDescending) break;
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| 165 | }
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| 166 | // Make sure we're not overflowing the row count.
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| 167 | if (i >= [oData count]) {
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| 168 | i = [oData count] - 1;
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| 169 | }
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| 170 | // Now select row i -- either the one we found, or the last row if not found.
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| 171 | [tableView selectRow:i byExtendingSelection:NO];
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| 172 | [tableView scrollRowToVisible:i];
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| 173 | }
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| 174 | }
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| 175 |
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| 176 | @end
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