Emit the #GtkSourceGutterRenderer::query-data signal. This function is called
to query for data just before rendering a cell. This is called from the
#GtkSourceGutter. Implementations can override the default signal handler or
can connect a signal handler externally to the
#GtkSourceGutterRenderer::query-data signal.
Emit the #GtkSourceGutterRenderer::query-data signal. This function is called to query for data just before rendering a cell. This is called from the #GtkSourceGutter. Implementations can override the default signal handler or can connect a signal handler externally to the #GtkSourceGutterRenderer::query-data signal.