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XSelectInput - select input
events
XSelectInput(display, w, event_mask)
Display *display;
Window w;
long event_mask;
- display
- Specifies the connection to the X server.
- event_mask
- Specifies
the event mask.
- w
- Specifies the window whose events you are interested in.
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.
- BadWindow
- A value for a
Window argument does not name a defined Window.
Xlib - C Language
X Interface
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