XtAppAddActionHook(3) XT FUNCTIONS XtAppAddActionHook(3)NAME
XtAppAddActionHook, XtRemoveActionHook - register an action hook procedure
SYNTAX
XtActionHookId XtAppAddActionHook(XtAppContext app_context, XtActionHookProc proc, XtPointer client_data);
void XtRemoveActionHook(XtActionHookId id);
ARGUMENTS
app_context
Specifies the application context.
proc Specifies the action hook procedure.
num_args Specifies the application-specific data to be passed to the action hook.
DESCRIPTION
XtAppAddActionHook adds the specified procedure to the front of a list maintained in the application context. In the future, when an action
routine is about to be invoked for any widget in this application context, either through the translation manager or via XtCallActionProc,
the action hohok procedures will be called in reverse order of registration jut prior to invoking the action routine.
Action hook procedures are removed automatically and the XtActionHookId s destroyed when the application context in which they were added
is destroyed.
XtRemoveActionHook removes the specified action hook procedure from the list in which it was registered.
SEE ALSO
X Toolkit Intrinsics - C Language Interface
Xlib - C Language X Interface
X Version 11 libXt 1.0.7 XtAppAddActionHook(3)
Check Out this Related Man Page
XtActionHookProc() XtActionHookProc()
Name
XtActionHookProc - interface definition for action hook procedure.
Synopsis
typedef void (*XtActionHookProc)(Widget, XtPointer, String, XEvent*, String*, Cardinal*);
Widget w;
XtPointer client_data;
String action_name;
XEvent* event;
String* params;
Cardinal* num_params;
Inputs
w Specifies the widget whose action is about to be dispatched.
client_data
Specifies data that was registered with this procedure in a call to XtAppAddActionHook().
action_name
Specifies the name of the action to be dispatched.
event Specifies the event argument that will be passed to the action routine.
params Specifies the action parameters that will be passed to the action routine.
num_params
Specifies the number of elements in params.
Availability
Release 4 and later.
Description
An XtActionHookProc registered with XtAppAddActionHook() will be called just before any action procedure is invoked by the Translation Man-
ager. client_data is whatever data was registered with the action hook procedure in the call to XtAppAddActionHook(). action_name is the
name of the action procedure that is about to be invoked. It is the name the action procedure was registered with, and can be used in a
call to XtCallActionProc(). The w, event, params, and num_params arguments are the arguments that will be passed directly to the action
procedure.
Action hooks should not modify any of the data pointed to by the arguments other than the client_data argument.
Usage
One use of an XtActionHookProc is to record the arguments passed to each action so that user actions are recorded for later playback using
XtCallActionProc(). This is one way to implement keyboard macros.
See AlsoXtAppAddActionHook(1), XtCallActionProc(1), XtRemoveActionHook(1),
XtActionProc(2).
Xt - Translations and Actions XtActionHookProc()
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