72 lines
2.1 KiB
Objective-C
72 lines
2.1 KiB
Objective-C
/*
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* PDP-8/E Simulator
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*
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* Copyright © 1994-2015 Bernhard Baehr
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*
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* NSControl+FileDrop.m - Category to support file drop for controls
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*
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* This file is part of PDP-8/E Simulator.
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*
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* PDP-8/E Simulator is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#import <Cocoa/Cocoa.h>
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#import "NSControl+FileDrop.h"
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#import "FileDropControlTargetProtocol.h"
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#import "NSFileManager+Additions.h"
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@implementation NSControl (FileDrop)
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- (void) registerAsFileDropTarget
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{
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[self registerForDraggedTypes:[NSArray arrayWithObject:NSFilenamesPboardType]];
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}
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- (void) unregisterAsFileDropTarget
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{
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[self unregisterDraggedTypes];
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}
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- (NSDragOperation) draggingEntered:(id <NSDraggingInfo>)sender
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{
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NSAssert ([[self target] conformsToProtocol:@protocol(FileDropControlTarget)],
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@"Control target does not conform to the DragDropControlTarget protocol");
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if (! [self isEnabled])
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return NSDragOperationNone;
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if (([sender draggingSourceOperationMask] & NSDragOperationGeneric) != NSDragOperationGeneric)
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return NSDragOperationNone;
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NSArray *paths = [[sender draggingPasteboard] propertyListForType:NSFilenamesPboardType];
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if ([paths count] != 1) // HIG: don't accept a drag with more than one allowed item
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return NSDragOperationNone;
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if (! [[self target] willAcceptFile:[paths objectAtIndex:0]])
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return NSDragOperationNone;
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return NSDragOperationCopy;
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}
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- (BOOL) performDragOperation:(id <NSDraggingInfo>)sender
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{
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return [[self target] acceptFile:[[NSFileManager defaultManager] resolveAliasPath:
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[[[sender draggingPasteboard] propertyListForType:NSFilenamesPboardType] objectAtIndex:0]]];
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}
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@end
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