man XtPopup (Fonctions bibliothèques) - map a pop-up
NAME
XtPopup, XtPopupSpringLoaded, XtCallbackNone, XtCallbackNonexclusive, XtCallbackExclusive - map a pop-up
SYNTAX
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.