📄 colormap-state.html
字号:
<HTML><HEAD><TITLE>Xlib Programming Manual: Colormap State Change Events</TITLE></HEAD><BODY><H1 ALIGN=center>10.12 Colormap State Change Events</H1><!.IN "Events" "ColormapNotify"><!.IN "ColormapNotify" "" "@DEF@">The X server can report<B>ColormapNotify</B>events to clients wanting information about when the colormap changes and when a colormap is installed or uninstalled. The X server generates this event type whenever a client application:<UL><P><LI>Changes the colormap member of the<A HREF="../window/attributes/#XSetWindowAttributes">XSetWindowAttributes</A>structure by calling<B><A HREF="../window/XChangeWindowAttributes.html">XChangeWindowAttributes()</A></B>,<B><A HREF="../color/XFreeColormap.html">XFreeColormap()</A></B>,or<B><A HREF="../window/XSetWindowColormap.html">XSetWindowColormap()</A></B><P><LI>Installs or uninstalls the colormap by calling<B><A HREF="../window-and-session-manager/XInstallColormap.html">XInstallColormap()</A></B>or<B><A HREF="../window-and-session-manager/XUninstallColormap.html">XUninstallColormap()</A></B></UL><P>To receive <B>ColormapNotify</B>events, set the<B>ColormapChangeMask</B>bit in the <A HREF="../window/attributes/event-and-do-not-propagate.html">event-mask</A> attribute of the window. <A NAME="XColormapEvent"></A><P>The structure for this event type contains:<P><!.IN "XColormapEvent" "" "@DEF@"><PRE><CODE>typedef struct { int type; /* ColormapNotify */ unsigned long serial; /* # of last request processed by server */ Bool send_event; /* true if this came from a <B><A HREF="../appendix/a.html#SendEvent">SendEvent</A></B> request */ Display *display; /* Display the event was read from */ Window window; Colormap colormap; /* colormap or None */ Bool new; int state; /* ColormapInstalled, ColormapUninstalled */} XColormapEvent;</PRE></CODE><P>The <B>window</B> member is set to the window whose associated colormap is changed, installed, or uninstalled.For a colormap that is changed, installed, or uninstalled,the <B>colormap</B> member is set to the colormap associated with the window. For a colormap that is changed by a call to<B><A HREF="../color/XFreeColormap.html">XFreeColormap()</A></B>,the <B>colormap</B> member is set to<B>None</B>.The new member is set to indicate whether the colormap for the specified window was changed or installed or uninstalledand can be <B>True</B>or<B>False</B>.If it is<B>True</B>,the colormap was changed.If it is<B>False</B>,the colormap was installed or uninstalled.The <B>state</B> member is always set to indicate whether the colormap is installed oruninstalled and can be <B>ColormapInstalled</B>or<B>ColormapUninstalled</B>.<H5 ALIGN=right><I>Next: <A HREF="client-communication/">Client Communication Events</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
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -