Source/DraggableImageView.m

   1 /*
   2  * PrintDrop
   3  * Copyright (c) 2008, Blue Static <http://www.bluestatic.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify it under the terms of the GNU
   6  * General Public License as published by the Free Software Foundation; either version 2 of the
   7  * License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
  10  * even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along with this program; if not,
  14  * write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
  15  */
  16
  17 #import "DraggableImageView.h"
  18
  19
  20 @implementation DraggableImageView
  21
  22 /**
  23  * Register drag types
  24  */
  25 - (void)awakeFromNib
  26 {
  27         [self registerForDraggedTypes:[NSArray arrayWithObject:NSFilenamesPboardType]];
  28         [pathDisplay setStringValue:@""];
  29 }
  30
  31 /**
  32  * Dealloc
  33  */
  34 - (void)dealloc
  35 {
  36         if (filePath != nil)
  37         {
  38                 [filePath release];
  39         }
  40         [super dealloc];
  41 }
  42
  43 /**
  44  * We're starting to drag; check and see if it's a valid type
  45  */
  46 - (NSDragOperation)draggingEntered:(id <NSDraggingInfo>)sender
  47 {
  48         NSPasteboard *pboard = [sender draggingPasteboard];
  49         NSDragOperation opMask = [sender draggingSourceOperationMask];
  50
  51         if ([[pboard types] containsObject:NSFilenamesPboardType] && (opMask & NSDragOperationCopy))
  52         {
  53                 NSString *file = [[pboard propertyListForType:NSFilenamesPboardType] objectAtIndex:0];
  54                 if ([[[file substringFromIndex:[file length] - 4] lowercaseString] isEqualToString: @".pdf"])
  55                 {
  56                         return NSDragOperationCopy;
  57                 }
  58         }
  59
  60         return NSDragOperationNone;
  61 }
  62
  63 /**
  64  * Dragging performed, set the image and filename
  65  */
  66 - (BOOL)performDragOperation:(id <NSDraggingInfo>)sender
  67 {
  68         if ([self draggingEntered:sender] == NSDragOperationCopy)
  69         {
  70                 NSString *path = [[[sender draggingPasteboard] propertyListForType:NSFilenamesPboardType] objectAtIndex:0];
  71
  72                 if (filePath != nil)
  73                 {
  74                         [filePath release];
  75                 }
  76                 filePath = [path retain];
  77                 [pathDisplay setStringValue:filePath];
  78
  79                 NSFileWrapper *fw = [[NSFileWrapper alloc] initWithPath:filePath];
  80                 [self setImage:[fw icon]];
  81                 [fw release];
  82
  83                 return YES;
  84         }
  85         return NO;
  86 }
  87
  88 @end