<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"> <HTML> <HEAD> <META NAME="GENERATOR" CONTENT="SGML-Tools 1.0.9"> <TITLE> {The S-lang C Library Reference}: SLsmg_set_color (int)</TITLE> <LINK HREF="cref-11.html" REL=next> <LINK HREF="cref-9.html" REL=previous> <LINK HREF="cref.html#toc10" REL=contents> </HEAD> <BODY> <A HREF="cref-11.html">Next</A> <A HREF="cref-9.html">Previous</A> <A HREF="cref.html#toc10">Contents</A> <HR> <H2><A NAME="SLsmg_set_color (int)"></A> <A NAME="s10">10. <B>SLsmg_set_color (int)</B></A></H2> <P> <DL> <DT><B> Synopsis </B><DD><P>Set the current color <DT><B> Usage </B><DD><P><CODE>void SLsmg_set_color (int c);</CODE> <DT><B> Description </B><DD><P><CODE>SLsmg_set_color</CODE> is used to set the current color. The parameter <CODE>c</CODE> is really a color object descriptor. Actual foreground and background colors as well as other visual attributes may be associated with a color descriptor via the <CODE>SLtt_set_color</CODE> function. <DT><B> Example </B><DD><P>This example defines color <CODE>7</CODE> to be green foreground on black background and then displays some text in this color: <BLOCKQUOTE><CODE> <PRE> SLtt_set_color (7, NULL, "green", "black"); SLsmg_set_color (7); SLsmg_write_string ("Hello"); SLsmg_refresh (); </PRE> </CODE></BLOCKQUOTE> <DT><B> Notes </B><DD><P>It is important to understand that the screen managment routines know nothing about the actual colors associated with a color descriptor. Only the descriptor itself is used by the <CODE>SLsmg</CODE> routines. The lower level <CODE>SLtt</CODE> interface converts the color descriptors to actual colors. Thus <BLOCKQUOTE><CODE> <PRE> SLtt_set_color (7, NULL, "green", "black"); SLsmg_set_color (7); SLsmg_write_string ("Hello"); SLtt_set_color (7, NULL, "red", "blue"); SLsmg_write_string ("World"); SLsmg_refresh (); </PRE> </CODE></BLOCKQUOTE> will result in <CODE>"hello"</CODE> displayed in red on blue and <EM>not</EM> green on black. <DT><B> See Also </B><DD><P><CODE>SLtt_set_color, SLtt_set_color_object</CODE> </DL> <P> <P> <P> <HR> <A HREF="cref-11.html">Next</A> <A HREF="cref-9.html">Previous</A> <A HREF="cref.html#toc10">Contents</A> </BODY> </HTML>