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       #include <X11/Intrinsic.h>
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12       void XtRealizeWidget(Widget w);
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14       Boolean XtIsRealized(Widget w);
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16       void XtUnrealizeWidget(Widget w);
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ARGUMENTS

19       w         Specifies the widget.
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DESCRIPTION

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

69       XtManageChildren(3)
70       X Toolkit Intrinsics - C Language Interface
71       Xlib - C Language X Interface
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75X Version 11                      libXt 1.2.0               XtRealizeWidget(3)
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