DroppingFileInWell

I’m trying to add file dropping support to a custom NSImageView subclass.

-(void)awakeFromNib {
NSArray *draggedTypeArray = [NSArray arrayWithObjects:NSFilenamesPboardType, nil];
[self registerForDraggedTypes:draggedTypeArray]; }

(NSDragOperation)draggingEntered:(id )sender { return NSDragOperationMove; }

But the above code does not change the cursor when dragging a file over the well (implying that it is not accepting the drag) - what am I doing wrong�?

You could try switching your draggedTypeArray to [NSImage imagePasteboardTypes]…

But I need to support file drops.

I meant in addition…so I should have said something like [[NSImage imagePasteboardTypes] arrayByAddingObject:NSFilenamesPboardType]; (sorry). It’s also possible that the file is automatically converted, but now that I think about it…no, probably not. However, there are other NSDraggingDestination methods you should probably implement; perhaps draggingUpdated: could help you here.

Sending your image view subclass a setEditable:YES message should be enough for it to accept drops: (edit: accept and set its image to the dropped image, that is)

[imageView setEditable:YES]

EnglaBenny

Here’s a full thing. Addition of delegate methods is left to the reader as an exercise :)

#import <Cocoa/Cocoa.h>

@interface FileDropView : NSImageView { IBOutlet id delegate; BOOL highlight; NSString * mFilePath; }

@end

#import “FileDropView.h”

@implementation FileDropView

(id)initWithCoder:(NSCoder *)coder { self = [super initWithCoder:coder]; if (self) { [self registerForDraggedTypes:[NSArray arrayWithObjects:NSFilenamesPboardType, nil]]; } return self; }
(id)initWithFrame:(NSRect)frame { self = [super initWithFrame:frame]; if (self) { [self registerForDraggedTypes:[NSArray arrayWithObjects:NSFilenamesPboardType, nil]]; } return self; }
(void)setFile:(NSString *)path { if (mFilePath) { [mFilePath release]; }

mFilePath = [[NSString stringWithString:path] retain]; NSImage * image = [[NSWorkspace sharedWorkspace] iconForFile:mFilePath]; [image setSize:NSMakeSize(48.0, 48.0)]; [self setImage:image]; }
(NSDragOperation)draggingEntered:(id )sender { if ([self isEnabled]) { highlight = YES; [self setNeedsDisplay:YES]; return NSDragOperationCopy; }

return NSDragOperationNone; }
(void)draggingExited:(id )sender { highlight = NO; [self setNeedsDisplay:YES]; }

/////////////////////////////////////////////////////////// // Draw method is overridden to do drop highlighing ///////////////////////////////////////////////////////////

(void)drawRect:(NSRect)rect { // Draw the normal frame first [super drawRect:rect];

// Then do the highlighting if (highlight) { [[NSColor grayColor] set]; [NSBezierPath setDefaultLineWidth:5]; [NSBezierPath strokeRect:rect]; } }
(BOOL)prepareForDragOperation:(id )sender { highlight = NO; [self setNeedsDisplay:YES]; return YES; }

(BOOL)performDragOperation:(id )info { NSPasteboard *pboard = [info draggingPasteboard];

// Dragging Filenames From Finder or the List if (pboard types] containsObject:[[NSFilenamesPboardType]) {

  NSArray * files = [pboard propertyListForType:NSFilenamesPboardType];
  NSEnumerator * enumerator = [files objectEnumerator];
  NSString * filePath;
	
  // Get the First File
  if (filePath = [enumerator nextObject]) {
      [self setFile:filePath];
  }
	
  return YES;   }

return NO; }

@end

– Seth Willits

DroppingScreamingChildIntoWell … If someone fills in this stub, I’ll toss *them into a well.*

CocoaDev

But the above code does not change the cursor when dragging a file over the well (implying that it is not accepting the drag) - what am I doing wrong�?