dragging images to the finder
-
All,
I'm trying to get drag-and-drop to work, using the finder as a
destination. I can drag my files into mail using NSTIFFPboardType.
My draggingSourceOperationMaskForLocal returns NSDragOperationEvery.
But, when I drag my file onto a finder window, I get no icon at all...
no little green plus indicating a copy. My pasteboard:
provideDataForType: is never called by the finder. How the heck to I
get the finder to accept a drop??
Thanks,
Eric -
On Jan 11, 2009, at 9:48 PM, Eric Smith wrote:
> I'm trying to get drag-and-drop to work, using the finder as a
> destination. I can drag my files into mail using NSTIFFPboardType.
> My draggingSourceOperationMaskForLocal returns
> NSDragOperationEvery. But, when I drag my file onto a finder
> window, I get no icon at all... no little green plus indicating a
> copy. My pasteboard: provideDataForType: is never called by the
> finder. How the heck to I get the finder to accept a drop??
Assuming you are trying to create a picture file here, you have to use
the pasteboard type "CorePasteboardFlavorType 0x6675726C" to get the
Finder to accept the drag, and it must contain a file URL string
pointing to the source image that you must write to the disk
somewhere. Or you could do a file promise drag instead; that's a lot
easier now than it used to be a while ago.
Nick Zitzmann
<http://www.chronosnet.com/> -
On 12.01.2009, at 05:50, Nick Zitzmann wrote:
> Assuming you are trying to create a picture file here, you have to use
> the pasteboard type "CorePasteboardFlavorType 0x6675726C" to get the
> Finder to accept the drag, and it must contain a file URL string
> pointing to the source image that you must write to the disk
> somewhere.
You do not really have to create some data for this PB flavor type.
It is much simpler.
You do not even have know what such a flovor means (I guess it is
part of AppleScript).
Do this: somewhere tell the pasteBoard what types you use for dragging:
NSPasteboard *pb = [NSPasteboard pasteboardWithName:NSDragPboard];
[pb declareTypes:[NSArray arrayWithObject:NSFilenamesPboardType]
owner:self];
And eventually (I hope you know where the image is an the disc) you
feed the pasteBoard with:
BOOL rtn = [pb setPropertyList:[NSArray
arrayWithObject:locationOfTheImage]
forType:NSFilenamesPboardType];
(Yes, you need an NSArray of files! ).
Now finally have a look at the dragPasteboard. It contains data for:
NSFilenamesPboardType
NeXT filename pasteboard type
CorePasteboardFlavorType 0x6675726C ( 'furl' )
Apple URL pasteboard type (internal name for NSURLPboardType)
CorePasteboardFlavorType 0x68667320 ( 'hfs ' )
Do not underestimate the power of the PasteBoardServer!
Godd luck, Heinrich
--
Heinrich Giesen
<giesenH...>
