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
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