XtUnmanageChildren()XtUnmanageChildren()Name
XtUnmanageChildren - remove a list of children from a parent widget's
managed list.
Synopsis
void XtUnmanageChildren(children, num_children)
WidgetList children;
Cardinal num_children;
Inputs
children Specifies an array of child widgets. Each child must be of
class RectObj or any subclass thereof.
num_children
Specifies the number of elements in children.
DescriptionXtUnmanageChildren() unmaps the specified widgets and removes them from
their parent's geometry management. The widgets will disappear from
the screen, and (depending on its parent) may no longer have screen
space allocated for them.
Each of the widgets in the children array must have the same parent.
See the "Algorithm" section below for full details of the widget unman‐
agement procedure.
Usage
Unmanaging widgets is the usual method for temporarily making them
invisible. They can be re-managed with XtManageChildren().
You can unmap a widget, but leave it under geometry management by call‐
ing XtUnmapWidget(). You can destroy a widget's window without
destroying the widget by calling XtUnrealizeWidget(). You can destroy
a widget completely with XtDestroyWidget().
If you are only going to unmanage a single widget, it is more conve‐
nient to call XtUnmanageChild(). It is often more convenient to call
XtUnmanageChild() several times than it is to declare and initialize an
array of widgets to pass to XtUnmanageChildren(). Calling XtUnman‐
ageChildren() is more efficient, however, because it only calls the
parent's change_managed() method once.
AlgorithmXtUnmanageChildren() performs the following:
· Issues an error if the children do not all have the same parent or
if the parent is not a subclass of compositeWidgetClass.
· Returns immediately if the common parent is being destroyed; other‐
wise, for each unique child on the list, XtUnmanageChildren() per‐
forms the following:
- Ignores the child if it already is unmanaged or is being
destroyed.
- Otherwise, if the child is realized, it makes it nonvisible by
unmapping it.
· Calls the change_managed() method of the widgets' parent if the par‐
ent is realized.
Structures
The WidgetList type is simply an array of widgets:
typedef Widget *WidgetList;
See AlsoXtDestroyWidget(1), XtIsManaged(1), XtManageChild(1), XtManageChil‐
dren(1), XtUnmanageChild(1).
Xt - Geometry Management XtUnmanageChildren()
