[R] Installing gWidgetsRGtk2: R session is headless

[Rainer Schuermann]

Michael, thanks, that was it!
I had installed the packages as root and tried them out as root (not a good idea I know, but I was lazy), while running the the X11 display as user.
Worse is that I have done that many times. One more thing learned.
Thanks again,
Rainer



On Thursday 23 October 2014 19:35:00 Michael Lawrence wrote:
> Perhaps this is a permissions (Xauthority) issue: is the same user running
> both the X11 display and the R session?
> 
> 
> 
> On Thu, Oct 23, 2014 at 2:40 AM, R <rainer.schuermann at gmx.net> wrote:
> 
> > I have written some gWidgets scripts before in the past but have a
> > different box now (Debian KWheezy) and cannot get gWidgets working. It may
> > be an obvious mistake but auntie Google (who has helped me a lot to get as
> > far as I am now) leaves me in the dark now.
> > Here is where I am stuck:
> > - - - - -
> > > library( gWidgets )
> > > library( gWidgetsRGtk2 )
> > Loading required package: RGtk2
> > No protocol specified
> > R session is headless; GTK+ not initialized.
> > >  obj <- gbutton("Hello world", container = gwindow())
> >
> > (R:15675): GLib-GObject-WARNING **: invalid (NULL) pointer instance
> >
> > (R:15675): GLib-GObject-CRITICAL **: g_signal_connect_data: assertion
> > `G_TYPE_CHECK_INSTANCE (instance)' failed
> >
> > (R:15675): Gtk-WARNING **: Screen for GtkWindow not set; you must always
> > set
> > a screen for a GtkWindow before using the window
> >
> > (R:15675): Gdk-CRITICAL **: IA__gdk_screen_get_default_colormap: assertion
> > `GDK_IS_SCREEN (screen)' failed
> >
> > (R:15675): Gdk-CRITICAL **: IA__gdk_colormap_get_visual: assertion
> > `GDK_IS_COLORMAP (colormap)' failed
> >
> > (R:15675): Gdk-CRITICAL **: IA__gdk_screen_get_default_colormap: assertion
> > `GDK_IS_SCREEN (screen)' failed
> >
> > (R:15675): Gdk-CRITICAL **: IA__gdk_screen_get_root_window: assertion
> > `GDK_IS_SCREEN (screen)' failed
> >
> > (R:15675): Gdk-CRITICAL **: IA__gdk_screen_get_root_window: assertion
> > `GDK_IS_SCREEN (screen)' failed
> >
> > (R:15675): Gdk-CRITICAL **: IA__gdk_window_new: assertion `GDK_IS_WINDOW
> > (parent)' failed
> >
> >  *** caught segfault ***
> > address 0x18, cause 'memory not mapped'
> >
> > Traceback:
> >  1: .Call(name, ..., PACKAGE = PACKAGE)
> >  2: .RGtkCall("S_gtk_widget_show", object, PACKAGE = "RGtk2")
> >  3: method(obj, ...)
> >  4: window$Show()
> >  5: .gwindow(toolkit, title, visible, width, height, parent, handler,
> >  action, ...)
> >  6: .gwindow(toolkit, title, visible, width, height, parent, handler,
> >  action, ...)
> >  7: gwindow()
> >  8: .gbutton(toolkit, text, border, handler, action, container, ...)
> >  9: .gbutton(toolkit, text, border, handler, action, container, ...)
> > 10: gbutton("Hello world", container = gwindow())
> >
> >
> > - - - - -
> > > sessionInfo()
> > R version 3.1.1 (2014-07-10)
> > Platform: x86_64-pc-linux-gnu (64-bit)
> >
> > locale:
> >  [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C
> >  [3] LC_TIME=en_US.UTF-8        LC_COLLATE=en_US.UTF-8
> >  [5] LC_MONETARY=en_US.UTF-8    LC_MESSAGES=en_US.UTF-8
> >  [7] LC_PAPER=en_US.UTF-8       LC_NAME=C
> >  [9] LC_ADDRESS=C               LC_TELEPHONE=C
> > [11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C
> >
> > attached base packages:
> > [1] stats     graphics  grDevices utils     datasets  methods   base
> >
> > loaded via a namespace (and not attached):
> > [1] tools_3.1.1
> >
> > ______________________________________________
> > R-help at r-project.org mailing list
> > https://stat.ethz.ch/mailman/listinfo/r-help
> > PLEASE do read the posting guide
> > http://www.R-project.org/posting-guide.html
> > and provide commented, minimal, self-contained, reproducible code.
> >
> 
> 	[[alternative HTML version deleted]]
> 
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>