XSelectInput

Section: XLIB FUNCTIONS (3)
Updated: libX11 1.6.4
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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

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Index

NAME

SYNTAX

ARGUMENTS

DESCRIPTION

DIAGNOSTICS

SEE ALSO