151 lines
3.8 KiB
Objective-C
Executable File
151 lines
3.8 KiB
Objective-C
Executable File
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#import "DNDArrayController.h"
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@implementation DNDArrayController
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NSString *MovedRowsType = @"MOVED_ROWS_TYPE";
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NSString *CogUrlsPbboardType = @"COG_URLS_TYPE";
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// @"CorePasteboardFlavorType 0x6974756E" is the "itun" type representing an iTunes plist
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NSString *iTunesDropType = @"CorePasteboardFlavorType 0x6974756E";
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- (void)awakeFromNib
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{
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// register for drag and drop
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[tableView registerForDraggedTypes:[NSArray arrayWithObjects:MovedRowsType, CogUrlsPbboardType, NSFilenamesPboardType, iTunesDropType, nil]];
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}
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- (BOOL)tableView:(NSTableView *)tv
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writeRows:(NSArray*)rows
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toPasteboard:(NSPasteboard*)pboard
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{
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NSData *data;
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data = [NSKeyedArchiver archivedDataWithRootObject:rows];
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[pboard declareTypes: [NSArray arrayWithObjects:MovedRowsType, nil] owner:self];
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[pboard setData: data forType: MovedRowsType];
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return YES;
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}
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- (NSDragOperation)tableView:(NSTableView*)tv
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validateDrop:(id <NSDraggingInfo>)info
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proposedRow:(int)row
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proposedDropOperation:(NSTableViewDropOperation)op
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{
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NSDragOperation dragOp = NSDragOperationCopy;
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if ([info draggingSource] == tv)
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dragOp = NSDragOperationMove;
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// we want to put the object at, not over,
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// the current row (contrast NSTableViewDropOn)
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[tv setDropRow:row dropOperation:NSTableViewDropAbove];
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return dragOp;
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}
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- (BOOL)tableView:(NSTableView*)tv
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acceptDrop:(id <NSDraggingInfo>)info
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row:(int)row
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dropOperation:(NSTableViewDropOperation)op
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{
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if (row < 0)
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{
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row = 0;
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}
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// if drag source is self, it's a move
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if ([info draggingSource] == tableView)
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{
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NSArray *rows = [NSKeyedUnarchiver unarchiveObjectWithData:[[info draggingPasteboard] dataForType: MovedRowsType]];
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NSIndexSet *indexSet = [self indexSetFromRows:rows];
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[self moveObjectsInArrangedObjectsFromIndexes:indexSet toIndex:row];
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// set selected rows to those that were just moved
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// Need to work out what moved where to determine proper selection...
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return YES;
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}
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return NO;
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}
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-(void)moveObjectsFromArrangedObjectIndexes:(NSArray *) sources toIndexes:(NSArray *)destinations;
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{
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//We expect [sources count] == [destinations count].
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NSMutableArray *selectedObjects = [[NSMutableArray alloc] init];
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NSUInteger i = 0;
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for (i = 0; i < [sources count]; i++) {
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NSUInteger source = [[sources objectAtIndex:i] unsignedIntegerValue];
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NSUInteger dest = [[destinations objectAtIndex:i] unsignedIntegerValue];
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id object = [[self arrangedObjects] objectAtIndex:source];
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[object retain];
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[self removeObjectAtArrangedObjectIndex:source];
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[self insertObject:object atArrangedObjectIndex:dest];
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[selectedObjects addObject: object];
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[object release];
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}
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[self setSelectedObjects:selectedObjects];
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[selectedObjects release];
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}
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-(void)moveObjectsInArrangedObjectsFromIndexes:(NSIndexSet*)indexSet
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toIndex:(unsigned int)insertIndex
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{
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int index = [indexSet lastIndex];
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int aboveInsertIndexCount = 0;
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int removeIndex;
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NSMutableArray *sources = [NSMutableArray array];
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NSMutableArray *destinations = [NSMutableArray array];
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while (NSNotFound != index)
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{
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if (index >= insertIndex) {
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removeIndex = index + aboveInsertIndexCount;
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aboveInsertIndexCount += 1;
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}
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else
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{
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removeIndex = index;
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insertIndex -= 1;
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}
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[sources addObject:[NSNumber numberWithUnsignedInteger:removeIndex]];
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[destinations addObject: [NSNumber numberWithUnsignedInteger:insertIndex]];
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index = [indexSet indexLessThanIndex:index];
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}
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[self moveObjectsFromArrangedObjectIndexes:sources toIndexes:destinations];
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}
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- (NSIndexSet *)indexSetFromRows:(NSArray *)rows
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{
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NSMutableIndexSet *indexSet = [NSMutableIndexSet indexSet];
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NSEnumerator *rowEnumerator = [rows objectEnumerator];
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NSNumber *idx;
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while (idx = [rowEnumerator nextObject])
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{
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[indexSet addIndex:[idx unsignedIntValue]];
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}
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return indexSet;
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}
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@end
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