Re: gtk_clipboard_set_image

[Lex Trotman <elextr gmail com>]

On 5 November 2010 19:15, Andy Bell <andy bell allbabel com> wrote:
>
> On Thu, Nov 4, 2010 at 8:22 PM, Lex Trotman <elextr gmail com> wrote:
>>
>> On 4 November 2010 19:44, Andy Bell <andy bell allbabel com> wrote:
>> > On Wed, Nov 3, 2010 at 11:46 PM, Lex Trotman <elextr gmail com> wrote:
>> >>
>> >> On 3 November 2010 21:19, Andy Bell <andy bell allbabel com> wrote:
>> >> > Hi All,
>> >> >
>> >> > I am having trouble with setting an image to the clipboard.
>> >> >
>> >> > I receive image data which I write out to disk and then create a
>> >> > GdkPixbuf
>> >> > from that, which I then store to the clipboard.
>> >> >
>> >> > My code is as follows:
>> >> >
>> >> > GError * error = NULL;
>> >> > GdkPixbuf * pixbuf = gdk_pixbuf_new_from_file( "/tmp/test.jpg",
>> >> > &error
>> >> > );
>> >> > if ( pixbuf != NULL && error == NULL )
>> >> > {
>> >> >     gtk_clipboard_set_image( gtk_clipboard_get(
>> >> > GDK_SELECTION_CLIPBOARD
>> >> > ),
>> >> > pixbuf );
>> >> >     gtk_clipboard_store( gtk_clipboard_get( GDK_SELECTION_CLIPBOARD )
>> >> > );
>> >> >     gdk_pixbuf_unref( pixbuf );
>> >> > }
>> >> > unlink(  "/tmp/test.jpg" );
>> >> >
>> >> > I don't get any errors, but when I come to try to paste it I have
>> >> > nothing on
>> >> > the clipboard.  For example, opening OpenOffice, I would like to
>> >> > paste
>> >> > the
>> >> > image but nothing happens, nor in GIMP.  I am using Ubuntu 10.4.
>> >>
>> >> I guess its too obvious to say that the pixbuf_new_from_file failed,
>> >> but did you check with a debugger or try adding an "else rude message"
>> >> clause?.
>> >>
>> >
>> > It works, I even check it with gtk_clipboard_wait_is_image_available and
>> > that returns true!  When I come back to get the image from the clipboard
>> > in
>> > the same application on an event using
>> > gtk_clipboard_wait_is_image_available
>> > it returns false.  Does the image have a life span or something?  Does
>> > it
>> > need to remain referenced in the application?
>>
>> Well clipboard_set_image doesn't say it takes a copy, but I would have
>> expected it to take a reference. Have you set can_store for images (or
>> all)?
>>
>
> I thought the following stored it to the clipboard:
> gtk_clipboard_store( gtk_clipboard_get( GDK_SELECTION_CLIPBOARD ) );
> I had thought it had something to do with threads but I am now looking at
> the fact that it could be something else.  This application is a CLI,

So long as it has a connection to the X server clipboards should still
work (I think, I'm no expert on the ICCCM).

 I am
> not sure if that has anything to do with it but a simple test CLI works fine
> using threads.  I am being passed data from an Air application which has
> full screen display and I am not sure whether there is something else going
> on in the background.

Yeah, maybe one of the other applications is "helping" you by clearing
the clipboard, thats the problem with shared things.

Cheers
Lex
> Thanks, Andy