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Hi there, I am currently maintaining gtkdatabox. It is a nice data plotting package which is tightly integrated with GTK. I am having problems with the 'realize' GTK function. When a previously 'unrealize' pixmap is addressed, I get seg fault. The chain flow goes like this : Add a reference to the widget the pack in a container. Remove the widget from a container. (it gets unrealized) Pack the widget back into the container. (the realize function is called and in this function it dies) It dies when calling the 'gdk_pixmap_get_size' function as the pixmap appears not to be valid. I can't work out how to check whether the pixmap is valid before I call this function. the code can be obtained from here : http://sourceforge.net/projects/gtkdatabox/ the offending code is in the file gtkdatabox_ruler.c : static void gtk_databox_ruler_make_pixmap (GtkDataboxRuler * ruler) { GtkWidget *widget; gint width; gint height; widget = GTK_WIDGET (ruler); if (ruler->priv->backing_pixmap) { gdk_pixmap_get_size (ruler->priv->backing_pixmap, &width, &height); if ((width == widget->allocation.width) && (height == widget->allocation.height)) return; g_object_unref (ruler->priv->backing_pixmap); } ruler->priv->backing_pixmap = gdk_pixmap_new (widget->window, widget->allocation.width, widget->allocation.height, -1); ruler->priv->xsrc = 0; ruler->priv->ysrc = 0; } thanks Matt |