Re: Default icon in treeview DnD

["Kristian Rietveld" <kris gtk org>]

On Wed, Aug 27, 2008 at 6:55 PM, Jeffrey Barish
<jeff_barish earthlink net> wrote:
>> On Tue, Aug 26, 2008 at 10:55 PM, Jeffrey Barish
>> <jeff_barish earthlink net> wrote:
>> Did you override the drag-begin signal or stop using
>> gtk_tree_view_enable_model_drag_source()?  These are both possible
>> causes for not getting an image of the row as drag icon.
>
> I call gtk_drag_begin for a drag from tv2 to itself.  However, I do not
> handle the signal.  I call gtk_tree_view_enable_model_drag_source for a
> drag from tv1 to tv2 (the drag that works correctly).  I tried changing the
> code for the drag from tv1 to tv2 so that it also uses
> gtk_tree_view_enable_model_drag_source (which defeats some of the
> functionality I need) instead of gtk_drag_begin.  I still get the wrong
> icon for that drag.

You will have to call gtk_tree_view_enable_model_drag_source() if you
want an image of the row as drag icon.  If you do not do so, you will
get the "default" image.  If using that does not work, like you said,
are you maybe overriding GtkTreeView's button press handler?  And are
you seeing any assertions that might be relevant?

> In examining my code, I noticed that I am specifying targets like this:
>
> ('tv1_row', GTK_TARGET_SAME_APP, 1)
>
> I have the identical specification for source and destination.  However,
> every example I see has targets that look like this:
>
> ('tv1_row', 0, 1)
>
> Sometimes the source target looks the same and sometimes it looks like my
> first example (in which case the source and destination targets do not
> match).  Moreover, 0 isn't even a valid value for the second parameter.  It
> seems as if the second parameter doesn't matter.  Is that conclusion
> correct?

As far as I know the target specification does not influence which
drag icon you will get.


regards,

-kris.