XtCallbackNonexclusive(3)

1XtPopup(3)                       XT FUNCTIONS                       XtPopup(3)
2
3
4

NAME

6       XtPopup, XtPopupSpringLoaded, XtCallbackNone, XtCallbackNonexclusive,
7       XtCallbackExclusive - map a pop-up
8

SYNTAX

10       #include <X11/Intrinsic.h>
11
12       void XtPopup(Widget popup_shell, XtGrabKind grab_kind);
13
14       void XtPopupSpringLoaded(Widget popup_shell);
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16       void XtCallbackNone(Widget w, XtPointer client_data, XtPointer
17              call_data);
18
19       void XtCallbackNonexclusive(Widget w, XtPointer client_data, XtPointer
20              call_data);
21
22       void XtCallbackExclusive(Widget w, XtPointer client_data, XtPointer
23              call_data);
24

ACTIONS

26       void XtMenuPopup(String shell_name);
27

ARGUMENTS

29       call_data Specifies the callback data, which is not used by this proce‐
30                 dure.
31
32       client_data
33                 Specifies the pop-up shell.
34
35       grab_kind Specifies the way in which user events should be constrained.
36
37       popup_shell
38                 Specifies the widget shell.
39
40       w         Specifies the widget.
41

DESCRIPTION

43       The XtPopup function performs the following:
44
45       •    Calls XtCheckSubclass to ensure popup_shell is a subclass of
46            Shell.
47
48       •    Generates an error if the shell's popped_up field is already True.
49
50       •    Calls the callback procedures on the shell's popup_callback list.
51
52       •    Sets the shell popped_up field to True, the shell spring_loaded
53            field to False, and the shell grab_kind field from grab_kind.
54
55       •    If the shell's create_popup_child field is non-NULL, XtPopup calls
56            it with popup_shell as the parameter.
57
58       •    If grab_kind is either XtGrabNonexclusive or XtGrabExclusive, it
59            calls:
60
61              XtAddGrab(popup_shell, (grab_kind == XtGrabExclusive), False)
62
63       •    Calls XtRealizeWidget with popup_shell specified.
64
65       •    Calls XMapWindow with popup_shell specified.
66
67       The XtPopupSpringLoaded function performs exactly as XtPopup except
68       that it sets the shell spring_loaded field to True and always calls
69       XtAddGrab with exclusive True and spring_loaded True.
70
71       The XtCallbackNone, XtCallbackNonexclusive, and XtCallbackExclusive
72       functions call XtPopup with the shell specified by the client data ar‐
73       gument and grab_kind set as the name specifies.  XtCallbackNone,
74       XtCallbackNonexclusive, and XtCallbackExclusive specify XtGrabNone,
75       XtGrabNonexclusive, and XtGrabExclusive, respectively.  Each function
76       then sets the widget that executed the callback list to be insensitive
77       by using XtSetSensitive.  Using these functions in callbacks is not re‐
78       quired.  In particular, an application must provide customized code for
79       callbacks that create pop-up shells dynamically or that must do more
80       than desensitizing the button.
81
82       XtMenuPopup is known to the translation manager, which must perform
83       special actions for spring-loaded pop-ups.  Calls to XtMenuPopup in a
84       translation specification are mapped into calls to a nonexported action
85       procedure, and the translation manager fills in parameters based on the
86       event specified on the left-hand side of a translation.
87
88       If XtMenuPopup is invoked on ButtonPress (possibly with modifiers), the
89       translation manager pops up the shell with grab_kind set to XtGrabEx‐
90       clusive and spring_loaded set to True.  If XtMenuPopup is invoked on
91       EnterWindow (possibly with modifiers), the translation manager pops up
92       the shell with grab_kind set to XtGrabNonexclusive and spring_loaded
93       set to False.  Otherwise, the translation manager generates an error.
94       When the widget is popped up, the following actions occur:
95
96       •    Calls XtCheckSubclass to ensure popup_shell is a subclass of
97            Shell.
98
99       •    Generates an error if the shell's popped_up field is already True.
100
101       •    Calls the callback procedures on the shell's popup_callback list.
102
103       •    Sets the shell popped_up field to True and the shell grab_kind and
104            spring_loaded fields appropriately.
105
106       •    If the shell's create_popup_child field is non-NULL, it is called
107            with popup_shell as the parameter.
108
109       •    Calls:
110
111              XtAddGrab(popup_shell, (grab_kind == XtGrabExclusive), spring_loaded)
112
113       •    Calls XtRealizeWidget with popup_shell specified.
114
115       •    Calls XMapWindow with popup_shell specified.
116
117       (Note that these actions are the same as those for XtPopup.)
118       XtMenuPopup tries to find the shell by searching the widget tree start‐
119       ing at the parent of the widget in which it is invoked.  If it finds a
120       shell with the specified name in the pop-up children of that parent, it
121       pops up the shell with the appropriate parameters.  Otherwise, it moves
122       up the parent chain as needed.  If XtMenuPopup gets to the application
123       widget and cannot find a matching shell, it generates an error.
124

NAME

SYNTAX

ACTIONS

ARGUMENTS

DESCRIPTION

SEE ALSO