NAME¶
XSelectInput - select input events
SYNTAX¶
int
XSelectInput(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 interested
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:
- •
- 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.
- •
- Only one client at a time can select
CirculateRequest, ConfigureRequest, or MapRequest
events, which are associated with the event mask
SubstructureRedirectMask.
- •
- Only one client at a time can select a ResizeRequest
event, which is associated with the event mask
ResizeRedirectMask.
- •
- 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.
DIAGNOSTICS¶
- BadWindow
- A value for a Window argument does not name a defined
Window.
SEE ALSO¶
Xlib - C Language X Interface