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  * Clears the file from selection
  41  */
  42 - (void)clearFile
  43 {
  44         [filePath release];
  45         filePath = nil;
  46         [pathDisplay setStringValue:@""];
  47         [self setImage:nil];
  48         [printButton setEnabled:NO];
  49 }
  50
  51 /**
  52  * Dealloc
  53  */
  54 - (void)dealloc
  55 {
  56         if (filePath != nil)
  57         {
  58                 [filePath release];
  59         }
  60         [super dealloc];
  61 }
  62
  63 /**
  64  * We're starting to drag; check and see if it's a valid type
  65  */
  66 - (NSDragOperation)draggingEntered:(id <NSDraggingInfo>)sender
  67 {
  68         NSPasteboard *pboard = [sender draggingPasteboard];
  69         NSDragOperation opMask = [sender draggingSourceOperationMask];
  70
  71         if ([[pboard types] containsObject:NSFilenamesPboardType] && (opMask & NSDragOperationCopy))
  72         {
  73                 NSString *file = [[pboard propertyListForType:NSFilenamesPboardType] objectAtIndex:0];
  74                 if ([[[file substringFromIndex:[file length] - 4] lowercaseString] isEqualToString: @".pdf"])
  75                 {
  76                         return NSDragOperationCopy;
  77                 }
  78         }
  79
  80         return NSDragOperationNone;
  81 }
  82
  83 /**
  84  * Dragging performed, set the image and filename
  85  */
  86 - (BOOL)performDragOperation:(id <NSDraggingInfo>)sender
  87 {
  88         if ([self draggingEntered:sender] == NSDragOperationCopy)
  89         {
  90                 NSString *path = [[[sender draggingPasteboard] propertyListForType:NSFilenamesPboardType] objectAtIndex:0];
  91
  92                 if (filePath != nil)
  93                 {
  94                         [filePath release];
  95                 }
  96                 filePath = [path retain];
  97                 [pathDisplay setStringValue:filePath];
  98
  99                 NSFileWrapper *fw = [[NSFileWrapper alloc] initWithPath:filePath];
 100                 [self setImage:[fw icon]];
 101                 [fw release];
 102
 103                 [printButton setEnabled:YES];
 104
 105                 return YES;
 106         }
 107         return NO;
 108 }
 109
 110 @end