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  * Returns the current file path
  33  */
  34 - (NSString *)filePath
  35 {
  36         return filePath;
  37 }
  38
  39 /**
  40  * Dealloc
  41  */
  42 - (void)dealloc
  43 {
  44         if (filePath != nil)
  45         {
  46                 [filePath release];
  47         }
  48         [super dealloc];
  49 }
  50
  51 /**
  52  * We're starting to drag; check and see if it's a valid type
  53  */
  54 - (NSDragOperation)draggingEntered:(id <NSDraggingInfo>)sender
  55 {
  56         NSPasteboard *pboard = [sender draggingPasteboard];
  57         NSDragOperation opMask = [sender draggingSourceOperationMask];
  58
  59         if ([[pboard types] containsObject:NSFilenamesPboardType] && (opMask & NSDragOperationCopy))
  60         {
  61                 NSString *file = [[pboard propertyListForType:NSFilenamesPboardType] objectAtIndex:0];
  62                 if ([[[file substringFromIndex:[file length] - 4] lowercaseString] isEqualToString: @".pdf"])
  63                 {
  64                         return NSDragOperationCopy;
  65                 }
  66         }
  67
  68         return NSDragOperationNone;
  69 }
  70
  71 /**
  72  * Dragging performed, set the image and filename
  73  */
  74 - (BOOL)performDragOperation:(id <NSDraggingInfo>)sender
  75 {
  76         if ([self draggingEntered:sender] == NSDragOperationCopy)
  77         {
  78                 NSString *path = [[[sender draggingPasteboard] propertyListForType:NSFilenamesPboardType] objectAtIndex:0];
  79
  80                 if (filePath != nil)
  81                 {
  82                         [filePath release];
  83                 }
  84                 filePath = [path retain];
  85                 [pathDisplay setStringValue:filePath];
  86
  87                 NSFileWrapper *fw = [[NSFileWrapper alloc] initWithPath:filePath];
  88                 [self setImage:[fw icon]];
  89                 [fw release];
  90
  91                 [printButton setEnabled:YES];
  92
  93                 return YES;
  94         }
  95         return NO;
  96 }
  97
  98 @end