[R] Installing gWidgetsRGtk2: R session is headless

[Michael Lawrence]

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
>
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> and provide commented, minimal, self-contained, reproducible code.
>

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