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 at‐
35            tributes 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 in‐
43                 stantiate children are responsible for realizing those chil‐
44                 dren 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 1.2.1               XtRealizeWidget(3)
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