XSetInputFocus

Syntax

XSetInputFocus(display, focus, revert_to, time)
      Display *display;
      Window focus;
      int revert_to; 
      Time time; 

Arguments

display Specifies the connection to the X server.
focus Specifies the window, PointerRoot, or None.
revert_to Specifies where the input focus reverts to if the window becomes not viewable. You can pass RevertToParent, RevertToPointerRoot, or RevertToNone.
time Specifies the time. You can pass either a timestamp or CurrentTime.

Description

The XSetInputFocus() function changes the input focus and the last-focus-change time. It has no effect if the specified time is earlier than the current last-focus-change time or is later than the current X server time. Otherwise, the last-focus-change time is set to the specified time (CurrentTime is replaced by the current X server time). XSetInputFocus() causes the X server to generate FocusIn and FocusOut events.

Depending on the focus argument, the following occurs:

XSetInputFocus() can generate BadMatch, BadValue, and BadWindow errors.

Diagnostics

BadMatch An InputOnly window is used as a Drawable.
BadMatch Some argument or pair of arguments has the correct type and range but fails to match in some other way required by the request.
BadMatch An InputOnly window is used as a Drawable.
BadMatch Some argument or pair of arguments has the correct type and range but fails to match in some other way required by the request.
BadValue Some numeric value falls outside the range of values accepted by the request. Unless a specific range is specified for an argument, the full range defined by the argument's type is accepted. Any argument defined as a set of alternatives can generate this error.
BadWindow A value for a Window argument does not name a defined Window.

See also

XGetInputFocus(), XWarpPointer(), "Controlling Input Focus".
Christophe Tronche, ch@tronche.com