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How to drag Image from SWT App to OS? [message #442502]

Sun, 05 September 2004 09:56

Wolfgang Werner

Messages: 10
Registered: July 2009

Junior Member

Hello,

I'm trying to perform a drag&drop operation from my SWT app to the
operating system. I need this
function on Windows and Mac OS X.

After patching DragSource.java the basic drag&drop mechanism works - I'm
able to transfer Text via
drag&drop to text processing applications.

But how to transfer image data? I already tried the ImageTransfer example,
but the dragged data is
not accepted by the image processing application. I think I have to create
the data in a compatible
format and flag that format accordingly - is that right?

Any hint is greatly appreciated!
Best regards, Wolfgang

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Re: How to drag Image from SWT App to OS? [message #442533 is a reply to message #442502]

Tue, 07 September 2004 17:49

Veronika Irvine

Messages: 1272
Registered: July 2009

Senior Member

You need to write a Carbon specific subclass of Transfer that implements the
JPEG data transfer to and from Java. For example, you could use
kScrapFlavorTypePicture ('PICT') as the native format and ImageData as the
Java format. The kScrapFlavorTypePicture transfers a PictHandle:

http://developer.apple.com/documentation/Carbon/Reference/Qu ickDraw_Ref/qdref_main/data_type_39.html#//apple_ref/c/tdef/ Picture

You can run the ClipboardExample which is found in project
org.eclipse.swt.examples in org.eclipse.swt.examples.clipboard Run Adobe
Photoshop, copy an image and click on the "Get Available Types" button in
the ClipboardExample and you will see a list of data types that Adobe
Photoshop uses to exchange data.

Once you have written this, you may wish to contribute it to the open source
community : )

"Wolfgang Werner" <wwerner@picturesafe.de> wrote in message
news:chenrp$jq5$1@eclipse.org...
> Hello,
>
> I'm trying to perform a drag&drop operation from my SWT app to the
> operating system. I need this
> function on Windows and Mac OS X.
>
> After patching DragSource.java the basic drag&drop mechanism works - I'm
> able to transfer Text via
> drag&drop to text processing applications.
>
> But how to transfer image data? I already tried the ImageTransfer example,
> but the dragged data is
> not accepted by the image processing application. I think I have to create
> the data in a compatible
> format and flag that format accordingly - is that right?
>
> Any hint is greatly appreciated!
> Best regards, Wolfgang
>

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