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<HTML><HEAD><TITLE>Xlib Programming Manual: Pointer Button Events</TITLE></HEAD><BODY><H1 ALIGN=center>10.5.1 Pointer Button Events</H1>The following describes the event processing that occurs when a pointer button press is processed with the pointer in some window w and when no active pointer grab is in progress.<P>The X server searches the ancestors of w from the root down,looking for a passive grab to activate.If no matching passive grab on the button exists,the X server automatically starts an active grab for the client receivingthe event and sets the last-pointer-grab time to the current server time.The effect is essentially equivalent to an<B><A HREF="../../input/XGrabButton.html">XGrabButton()</A></B>with these client passed arguments:<TABLE><TR><TD COLSPAN=2><HR><TR><TD><B>Argument <TD><B>Value<TR><TD COLSPAN=2><HR><TR><TD><B>w</B> <TD>The event window <TR><TD><B>event_mask</B> <TD>The client's selected pointer events on the event window<TR><TD><B>pointer_mode</B> <TD><B>GrabModeAsync</B><TR><TD><B>keyboard_mode</B> <TD><B>GrabModeAsync</B> <TR><TD><B>owner_events</B> <TD><B>True</B>, on the event window, otherwise <B>False</B> <TR><TD><B>confine_to</B> <TD><B>None</B> <TR><TD><B>cursor</B> <TD><B>None</B> <TR><TD COLSPAN=2><HR></TABLE><P>The active grab is automatically terminated when the logical state of the pointer has all buttons released.Clients can modify the active grab by calling<B><A HREF="../../input/XUngrabPointer.html">XUngrabPointer()</A></B>and<B><A HREF="../../input/XChangeActivePointerGrab.html">XChangeActivePointerGrab()</A></B>.<H5 ALIGN=right><I>Next: <A HREF="keyboard-pointer.html">Keyboard and Pointer 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
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