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<HTML><HEAD><TITLE>Xlib Programming Manual: Window Attributes: Colormap Attribute</TITLE></HEAD><BODY><H1 ALIGN=center>3.2.9 Colormap Attribute</H1>The colormap attribute specifies which colormap best reflects the truecolors of the <B><A HREF="../create.html#InputClass">InputOutput</A></B>window. The colormap must have the same visual type as the window,or a <B>BadMatch</B>error results. X servers capable of supporting multiple hardware colormaps can use this information, and window managers can use it for calls to<B><A HREF="../../window-and-session-manager/XInstallColormap.html">XInstallColormap()</A></B>.You can set the colormap attribute to a colormap or to<B>CopyFromParent</B>(default).<P>If you set the colormap to<B>CopyFromParent</B>,the parent window's colormap is copied and used by its child.However, the child window must have the same visual type as the parent, or a <B>BadMatch</B>error results. The parent window must not have a colormap of <B>None</B>,or a <B>BadMatch</B>error results.The colormap is copied by sharing the colormap object between the child and parent, not by making a complete copy of the colormap contents.Subsequent changes to the parent window's colormap attribute donot affect the child window.<H5 ALIGN=right><I>Next: <A HREF="cursor.html">Cursor Attribute</A></I></H5><HR><ADDRESS><A HREF="http://tronche.com/">Christophe Tronche</A>, <A HREF="mailto:ch.tronche@computer.org">ch.tronche@computer.org</A></ADDRESS></BODY></HTML>⌨️ 快捷键说明
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