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XtRealizeWidget(3Xt)
X11R6
NAME
  XtRealizeWidget, XtIsRealized, XtUnrealizeWidget - realize and unrealize
  widgets

SYNOPSIS
  void XtRealizeWidget(w)
	  Widget w;

  Boolean XtIsRealized(w)
	  Widget w;

  void XtUnrealizeWidget(w)
	  Widget w;

ARGUMENTS
  w   Specifies the widget.

DESCRIPTION
  If the widget is already realized, XtRealizeWidget simply returns.
  Otherwise, it performs the following:

    ·  Binds all action names in the widget's translation table to procedures
       (see Section 10.1.2).

    ·  Makes a post-order traversal of the widget tree rooted at the
       specified widget and calls the change_managed procedure of each
       composite widget that has one or more managed children.

    ·  Constructs an XSetWindowAttributes structure filled in with
       information derived from the Core widget fields and calls the realize
       procedure for the widget, which adds any widget-specific attributes
       and creates the X window.

    ·  If the widget is not a subclass of compositeWidgetClass,
       XtRealizeWidget returns; otherwise, it continues and performs the
       following:

	 -- Descends recursively to each of the widget's managed children and
	    calls the realize procedures. Primitive widgets that instantiate
	    children are responsible for realizing those children themselves.

	 -- Maps all of the managed children windows that have
	    mapped_when_managed True. (If a widget is managed but
	    mapped_when_managed is False, the widget is allocated visual
	    space but is not displayed.	 Some people seem to like this to
	    indicate certain states.)

  If the widget is a top-level shell widget (that is, it has no parent), and
  mapped_when_managed is True, XtRealizeWidget maps the widget window.

  The XtIsRealized function returns True if the widget has been realized,
  that is, if the widget has a nonzero X window ID.

  Some widget procedures (for example, set_values) might wish to operate
  differently after the widget has been realized.

  The XtUnrealizeWidget function destroys the windows of an existing widget
  and all of its children (recursively down the widget tree). To recreate the
  windows at a later time, call XtRealizeWidget again. If the widget was
  managed, it will be unmanaged automatically before its window is freed.

SEE ALSO
  XtManageChildren(3Xt)

  X Toolkit Intrinsics -- C Language Interface

  Xlib -- C Language X Interface

Index for Section 3Xt

Alphabetical listing for X

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