Re: OffscreenWindow returns empty pixbuf

[Phil Wolff <adiabat centurylink net>]

Yes, I discovered that yesterday, but my end use for this cannot rely on 
user intervention.

I derived my own OffscreenWindow class so I could trap events. Following 
the show_all(), I see signal_realize, and I see signal_map, but 
(contrary to the documentation: "The signal_map_event() signal will be 
emitted when the widget's window is mapped. A window is mapped when it 
becomes visible on the screen.") I never see signal_map_event, which is 
the one that would tell me when to call get_pixbuf().

???

Phil

On 09/03/2014 01:46 AM, Kjell Ahlstedt wrote:
> Den 2014-09-02 01:23, Phil Wolff skrev:
> > Can anybody tell me why this code returns a properly sized Pixbuf 
> > with no image data?
> When Gtk::OffscreenWindow::get_pixbuf() is called in Test::Test, the 
> OffscreenWindow has not yet been drawn. Try my modified version of 
> your code. When it's started, the window is empty. If you press a 
> mouse button in the window, Test::on_button_press_event() is called, 
> and the label's text is shown.
>
> Kjell