144 lines
3.5 KiB
Objective-C
Executable File
144 lines
3.5 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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// @"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, NSFilenamesPboardType,
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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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int rowsAbove = [self rowsAboveRow:row inIndexSet:indexSet];
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NSRange range = NSMakeRange(row - rowsAbove, [indexSet count]);
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indexSet = [NSIndexSet indexSetWithIndexesInRange:range];
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[self setSelectionIndexes:indexSet];
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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) moveObjectsInArrangedObjectsFromIndexes:(NSIndexSet*)indexSet
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toIndex:(unsigned int)insertIndex
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{
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NSArray *objects = [self arrangedObjects];
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int index = [indexSet lastIndex];
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int aboveInsertIndexCount = 0;
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id object;
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int removeIndex;
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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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object = [objects objectAtIndex:removeIndex];
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[object retain];
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[self removeObjectAtArrangedObjectIndex:removeIndex];
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[self insertObject:object atArrangedObjectIndex:insertIndex];
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[object release];
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index = [indexSet indexLessThanIndex:index];
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}
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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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- (int)rowsAboveRow:(int)row inIndexSet:(NSIndexSet *)indexSet
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{
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unsigned currentIndex = [indexSet firstIndex];
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int i = 0;
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while (currentIndex != NSNotFound)
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{
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if (currentIndex < row) { i++; }
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currentIndex = [indexSet indexGreaterThanIndex:currentIndex];
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}
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return i;
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}
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@end
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