1XtRealizeWidget(3)               XT FUNCTIONS               XtRealizeWidget(3)
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NAME

6       XtRealizeWidget, XtIsRealized, XtUnrealizeWidget - realize and unreal‐
7       ize widgets
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SYNTAX

10       void XtRealizeWidget(Widget w);
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12       Boolean XtIsRealized(Widget w);
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14       void XtUnrealizeWidget(Widget w);
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ARGUMENTS

17       w         Specifies the widget.
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DESCRIPTION

20       If the widget is already realized, XtRealizeWidget simply returns.
21       Otherwise, it performs the following:
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23       ·    Binds all action names in the widget's translation table to proce‐
24            dures (see Section 10.1.2).
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26       ·    Makes a post-order traversal of the widget tree rooted at the
27            specified widget and calls the change_managed procedure of each
28            composite widget that has one or more managed children.
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30       ·    Constructs an XSetWindowAttributes structure filled in with infor‐
31            mation derived from the Core widget fields and calls the realize
32            procedure for the widget, which adds any widget-specific
33            attributes and creates the X window.
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35       ·    If the widget is not a subclass of compositeWidgetClass,
36            XtRealizeWidget returns; otherwise, it continues and performs the
37            following:
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39            -    Descends recursively to each of the widget's managed children
40                 and calls the realize procedures.  Primitive widgets that
41                 instantiate children are responsible for realizing those
42                 children themselves.
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44            -    Maps all of the managed children windows that have
45                 mapped_when_managed True.  (If a widget is managed but
46                 mapped_when_managed is False, the widget is allocated visual
47                 space but is not displayed.  Some people seem to like this to
48                 indicate certain states.)
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50       If the widget is a top-level shell widget (that is, it has no parent),
51       and mapped_when_managed is True, XtRealizeWidget maps the widget win‐
52       dow.
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54       The XtIsRealized function returns True if the widget has been realized,
55       that is, if the widget has a nonzero X window ID.
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57       Some widget procedures (for example, set_values) might wish to operate
58       differently after the widget has been realized.
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60       The XtUnrealizeWidget function destroys the windows of an existing wid‐
61       get and all of its children (recursively down the widget tree).  To
62       recreate the windows at a later time, call XtRealizeWidget again.  If
63       the widget was managed, it will be unmanaged automatically before its
64       window is freed.
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SEE ALSO

67       XtManageChildren(3Xt)
68       X Toolkit Intrinsics - C Language Interface
69       Xlib - C Language X Interface
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73X Version 11                      libXt 1.0.7               XtRealizeWidget(3)
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