XpInputSelected(3Xp) XPRINT FUNCTIONS XpInputSelected(3Xp)NAME
XpInputSelected - Queries which X Print events the client has selected to receive from the specific print context.
SYNOPSIS
cc [ flag... ] file... -lXp [ library... ]
#include <X11/extensions/Print.h>
unsigned long XpInputSelected ( display, context, event_mask )
Display *display;
XPContext context;
unsigned long *all_event_mask_return;
ARGUMENTS
display
Specifies a pointer to the Display structure; returned from XOpenDisplay.
context
Specifies the print context to which the query is being made.
all_event_mask_return
Returns the set of events that any client has selected.
DESCRIPTION
XpInputSelected returns a bit mask describing which event classes the client has selected to receive. The value returned to
all_event_mask_return is the union of every client's event mask. XpInputSelected queries which X Print events from the specified print
context the client has selected to receive. The X Print Events are generated from a print context, and not from a window as is the case
with XSelectInput. As events arrive, the context field in the event is used to determine which print context generated the event. See XpS-
electInput for the event_mask and all_event_mask (??return??) values.
DIAGNOSTICS
XPBadContext The specified print context is not valid.
SEE ALSO XpSelectInput(3Xp)X Version 11 libXp 1.0.0 XpInputSelected(3Xp)
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XpCreateContext(3Xp) XPRINT FUNCTIONS XpCreateContext(3Xp)NAME
XpCreateContext - Creates and initializes a new print context.
SYNOPSIS
cc [ flag... ] file... -lXp [ library... ]
#include <X11/extensions/Print.h>
XPContext XpCreateContext ( display, printer_name )
Display *display;
char *printer_name;
ARGUMENTS
display
Specifies a pointer to the Display structure; returned from XOpenDisplay.
printer_name
The name of a printer on display. String encoded as COMPOUND_TEXT.
DESCRIPTION
XpCreateContext creates a new print context that is initialized with the default printer attributes and other information available for
printer_name on display. A print context maintains the printer name, print attributes, font capabilities, print (rendering) state and
results, and is the object upon which the Xp calls act.
If the library fails to generate a new print context-id, a value of None is returned, otherwise a print context-id is always returned. If
printer_name is invalid, a BadMatch is generated later by the X Print Server.
A call to XpGetPrinterList will return a valid list of values for printer_name. All printer name values in the X Print Service are encoded
as COMPOUND_TEXT (of which the ISO-8859-1 code-set is a proper subset).
As soon as a print context is created, the print attributes in it can be accessed and modified by calling XpGetAttributes and XpSetAt-
tributes, and the event selections in it can be modified by calling XpSelectInput and XpInputSelected. Other Xp calls that explicitly take
a print context-id as a parameter will operate directly on that print context. All Xp and X calls without a print context-id parameter (for
example, all rendering oriented calls like XpStartJob and XDrawLine) require that a print context be set on the display connection (see
XpSetContext). Failure to set a print context prior to calling a print-context-dependent call will result in the generation of an XPBadCon-
text error.
The XPContext returned by XpCreateContext is an XID, and can be used to set the print context on display connections by calling XpSetCon-
text. The XPContext id can be shared between processes and display connections. It is the responsibility of the clients sharing a print
context to coordinate their usage of the context; for example they must ensure that in-use print contexts are not prematurely destroyed.
The context_id remains valid for all clients until 1) the client creating the print context closes its display connection, or 2) any client
calls XpDestroyContext. The context_id can be kept valid after the creating client's display connection closes if XSetCloseDownMode is
called on display with RetainPermanent or RetainTemporary.
After creating a print context, and possibly modifying the XPDocAttr attribute document-format using a value from the list of available
formats shown in the XPPrinterAttr attribute document-formats-supported, the application must query the X Print Server via XpGetScreenOf-
Context for the screen that has been associated with the print context, and then create all server resources that will be used in the print
job on that screen. Failure to do so will result in undefined behavior.
When XpCreateContext is called, the client's locale (see XpSetLocaleHinter) is included in the request as a "hint" to the X Print Server.
If supported by the implementation, the X Print Server will use the hint to initialize the attribute pools with any localized attribute
values (for example, the human readable XPPrinterAttr attribute "descriptor" may be available in several different languages, and the hint
will be used to select one). If the X Print Server cannot understand the hint, the X Print Server chooses a default value.
This function can generate a BadMatch error if the specified printer_name does not exist on display, or if the print server could not
interpret the code set specified in printer_name.
DIAGNOSTICS
BadMatch The value specified for doc_fmt is not valid for the current document type or the value specified for drawable is not valid
for the print context and print screen.
SEE ALSO XpDestroyContext(3Xp), XpGetAttributes(3Xp), XpGetPrinterList(3Xp), XpGetScreenOfContext(3Xp), XpInputSelected(3Xp), XpSelectInput(3Xp),
XpSetAttributes(3Xp), XpSetContext(3Xp), XpSetLocaleHinter(3Xp), XpStartJob(3Xp)X Version 11 libXp 1.0.0 XpCreateContext(3Xp)