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Manual Reference Pages  -  XMTCREATECHILD (3)


XmtCreateChild(), XmtCreateQueryChild(), XmtCreateQueryListChild() - create a named child and all of its descendants.



   Widget XmtCreateChild(Widget parent, String name)

   Widget XmtCreateQueryChild(Widget parent, String name,
{ String child_name, Widget *child_address, }

   Widget XmtCreateQueryListChild(Widget parent, XmtWidgetList * names, Cardinal num_names)

   typedef struct {
XrmQuark nameq;
Widget *widgetp;    
} XmtWidgetList;


parent The widget that is to have a named child created.
name The name of the child to be created.
child_name The name of a widget to be returned. May be repeated any number of times in a NULL-terminated variable-length argument list.
names An array containing num_names entries.
num_names The number of entries in the names\P lilst.


child_address The address at which the widget specified by child_name is to be stored. May be repeated any number of times in a NULL-terminated variable length argument list.


The newly created child of parent.


XmtCreateChild(), XmtCreateQueryChild(), and XmtCreateQueryListChild() are similar to XmtCreateChildren(), XmtCreateQueryChildren() and XmtCreateQueryListChildren(). While the latter functions read the xmtChildren resource of a widget and create all of its children, these functions create only a single child of the parent widget. The name of this child is specified by name, and its type is determined by reading its xmtType resource, which must specify a registered widget type or template, as described in Chapter 11, Automatic Widget Creation.

Once the functions have created this first named child, they read the child’s xmtChildren resource, and proceed to create all of its descendants just as the XmtCreateChildren() family of functions do. Once all descendants have been created, these functions return the original child widget.

Like XmtCreateQueryChildren(), XmtCreateQueryChild() can return the widgets it creates in the child_address arguments in its NULL-terminated variable-length argument list.

Also like XmtCreateQueryListChildren(), XmtCreateQueryListChild() can return the widgets it creates via the names array argument. Each entry in this array has two values: a XrmQuark nameq and a Widget * widgetp. The nameq must be initialized to the Quark corresponding to the widget’s name (typically by calling XrmQuarkToString); the widgetp must be initialized to point to a Widget variable. The address pointed to by widgetp will be set to the address of the last widget created with the given name, or NULL if no such widget was created.


These functions are useful when you want to defer creation of some subtree of your widget hierarchy. XmtBuildDialog() and XmtBuildToplevel() are also useful for this purpose.


Chapter 11, Automatic Widget Creation,
XmtBuild[Query]Application(), XmtBuild[Query]Dialog(), XmtBuild[Query]Toplevel(), XmtCreate[Query]Children(), XmtCreateQueryListChildren().
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Xmt XMTCREATECHILD (3) Motif Tools

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