XtPopup
NAME
XtPopup, XtPopupSpringLoaded, XtCallbackNone, XtCallbackNonexclusive, XtCallbackExclusive - map a pop-up
SYNTAX
void XtPopup(Widget popup_shell, XtGrabKind grab_kind);
void XtPopupSpringLoaded(Widget popup_shell);
void XtCallbackNone(Widget w, XtPointer client_data, XtPointer
call_data):
void XtCallbackNonexclusive(Widget w, XtPointer client_data,
XtPointer call_data);
void XtCallbackExclusive(Widget w, XtPointer client_data,
XtPointer call_data);
void MenuPopup(String shell_name);
ARGUMENTS
call_data
Specifies the callback data,
which is not used by this procedure.
client_data
Specifies the pop-up shell.
grab_kind
Specifies the way in which user events should be constrained.
popup_shell
Specifies the widget shell.
w
Specifies the widget.
DESCRIPTION
The
function performs the following:
Calls
to ensure popup_shell is a subclass of
Generates an error if the shell's popped_up field is already
Calls the callback procedures on the shell's popup_callback list.
Sets the shell popped_up field to
the shell spring_loaded field to
and the shell grab_kind field from grab_kind.
If the shell's create_popup_child field is non-NULL,
calls it with popup_shell as the parameter.
If grab_kind is either
or
it calls:
XtAddGrab(popup_shell, (grab_kind == XtGrabExclusive), False)
Calls
with popup_shell specified.
Calls
with popup_shell specified.
The
function performs exactly as
except that it sets the shell spring_loaded field to
and always calls
with exclusive
and spring_loaded
The
and
functions call
with the shell specified by the client data argument
and grab_kind set as the name specifies.
and
specify
and
respectively.
Each function then sets the widget that executed the callback list
to be insensitive by using
Using these functions in callbacks is not required.
In particular,
an application must provide customized code for
callbacks that create pop-up shells dynamically or that must do more than
desensitizing the button.
is known to the translation manager,
which must perform special actions for spring-loaded pop-ups.
Calls to
in a translation specification are mapped into calls to a
nonexported action procedure,
and the translation manager fills in parameters
based on the event specified on the left-hand side of a translation.
If
is invoked on
(possibly with modifiers),
the translation manager pops up the shell with grab_kind set to
and spring_loaded set to
If
is invoked on
(possibly with modifiers),
the translation manager pops up the shell with grab_kind set to
and spring_loaded set to
Otherwise, the translation manager generates an error.
When the widget is popped up,
the following actions occur:
Calls
to ensure popup_shell is a subclass of
Generates an error if the shell's popped_up field is already
Calls the callback procedures on the shell's popup_callback list.
Sets the shell popped_up field to
and the shell grab_kind and spring_loaded fields appropriately.
If the shell's create_popup_child field is non-NULL,
it is called with popup_shell as the parameter.
Calls:
XtAddGrab(popup_shell, (grab_kind == XtGrabExclusive), spring_loaded)
Calls
with popup_shell specified.
Calls
with popup_shell specified.
(Note that these actions are the same as those for
tries to find the shell by searching the widget tree starting at
the parent of the widget in which it is invoked.
If it finds a shell with the specified name in the pop-up children of
that parent, it pops up the shell with the appropriate parameters.
Otherwise, it moves up the parent chain as needed.
If
gets to the application widget and cannot find a matching shell,
it generates an error.
SEE ALSO
XtCreatePopupShell(3Xt),
XtPopdown(3Xt)
