Warning
gdk_gc_set_rgb_bg_color has been deprecated since version 2.22 and should not be used in newly-written code. Use gdk_cairo_set_source_color() instead.
Set the background color of a GC using an unallocated color. The
pixel value for the color will be determined using GdkRGB. If the
colormap for the GC has not previously been initialized for GdkRGB,
then for pseudo-color colormaps (colormaps with a small modifiable
number of colors), a colorcube will be allocated in the colormap.
Calling this function for a GC without a colormap is an error.
Warning gdk_gc_set_rgb_bg_color has been deprecated since version 2.22 and should not be used in newly-written code. Use gdk_cairo_set_source_color() instead. Set the background color of a GC using an unallocated color. The pixel value for the color will be determined using GdkRGB. If the colormap for the GC has not previously been initialized for GdkRGB, then for pseudo-color colormaps (colormaps with a small modifiable number of colors), a colorcube will be allocated in the colormap. Calling this function for a GC without a colormap is an error.