如何使用GTK将rgb转换为十六进制？

Question

How to convert rgb to hexadecimal using GTK?

I can convert from hex to rgb using gdk_rgba_parse (GdkRGBA *rgba, const gchar *spec); , but not the reverse.

Answer 1

You can do this manually:

sprintf(spec, "#%02X%02X%02X", (int)(rgba.red*255), (int)(rgba.green*255), (int)(rgba.blue*255));

Be sure to provide a buffer large enough to hold the string or use g_strdup_printf instead.