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drag and drop change icon [message #536990]

Mon, 31 May 2010 19:40

Lidder

Messages: 46
Registered: July 2009

Member

Hello,

I implemented drag and drop support in my plugin using the following article.
http://www.eclipse.org/articles/Article-Workbench-DND/drag_d rop.html

Is there a way to change the icon that is displayed when something is dragged. I have a multi column custom tree viewer extended from TreeViewer. When I drag a row from the tree, I see multiple colums being dragged. Can I change that to to text of the first column only?

Thanks.

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Re: drag and drop change icon [message #537739 is a reply to message #536990]

Thu, 03 June 2010 14:03

Grant Gayed

Messages: 2150
Registered: July 2009

Senior Member

Hi,

You can set the image in the DragSourceListener's image field:

source.addDragListener (new DragSourceListener () {
public void dragStart(DragSourceEvent event) {
event.image = image; // <----
...
}
...
}

In your specific case of setting the drag image to the item's column 0 text,
you'll need to create an Image with this content. You could do this either
by using a GC to capture the bounds of the item's column 0 cell to an Image
(somewhat related example of this:
http://dev.eclipse.org/viewcvs/index.cgi/org.eclipse.swt.sni ppets/src/org/eclipse/swt/snippets/Snippet95.java?view=co )
, or create an Image from scratch and GC.drawString(...) the item's column 0
text to it.

HTH,
Grant

"Lidder" <ulidder@gmail.com> wrote in message
news:hu13c7$o4j$1@build.eclipse.org...
> Hello,
>
> I implemented drag and drop support in my plugin using the following
article.
> http://www.eclipse.org/articles/Article-Workbench-DND/drag_d rop.html
>
> Is there a way to change the icon that is displayed when something is
dragged. I have a multi column custom tree viewer extended from TreeViewer.
When I drag a row from the tree, I see multiple colums being dragged. Can I
change that to to text of the first column only?
>
> Thanks.

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Re: drag and drop change icon [message #538871 is a reply to message #537739]

Tue, 08 June 2010 20:29

Lidder

Messages: 46
Registered: July 2009

Member

Thanks Grant. Worked beautifully.

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Re: drag and drop change icon [message #1022748 is a reply to message #538871]

Fri, 22 March 2013 13:15

Miguel Moreo

Messages: 8
Registered: March 2013

Junior Member

Hello,

Could you please post the solution to this problem?
I am pretty new in JFace and I can not find a way to get the GC to capture the bounds of the item's column. Sad

I am only able to capture the full table.

Thanks!

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