XSelectInput(3X11) XLIB FUNCTIONS XSelectInput(3X11)NAMEXSelectInput - select input events
SYNTAX
XSelectInput(display, w, event_mask)
Display *display;
Window w;
long event_mask;
ARGUMENTS
display Specifies the connection to the X server.
event_mask
Specifies the event mask.
w Specifies the window whose events you are inter-
ested in.
DESCRIPTION
The XSelectInput function requests that the X server
report the events associated with the specified event
mask. Initially, X will not report any of these events.
Events are reported relative to a window. If a window is
not interested in a device event, it usually propagates to
the closest ancestor that is interested, unless the
do_not_propagate mask prohibits it.
Setting the event-mask attribute of a window overrides any
previous call for the same window but not for other
clients. Multiple clients can select for the same events
on the same window with the following restrictions:
o Multiple clients can select events on the same window
because their event masks are disjoint. When the X
server generates an event, it reports it to all
interested clients.
o Only one client at a time can select
CirculateRequest, ConfigureRequest, or MapRequest
events, which are associated with the event mask
SubstructureRedirectMask.
o Only one client at a time can select a ResizeRequest
event, which is associated with the event mask
ResizeRedirectMask.
o Only one client at a time can select a ButtonPress
event, which is associated with the event mask
ButtonPressMask.
The server reports the event to all interested clients.
XSelectInput can generate a BadWindow error.
X Version 11 Release 6.4 1
XSelectInput(3X11) XLIB FUNCTIONS XSelectInput(3X11)DIAGNOSTICS
BadWindow A value for a Window argument does not name a
defined Window.
SEE ALSO
Xlib - C Language X Interface
X Version 11 Release 6.4 2
