172) How do I set the current choice in a radio box or an option

menu?
[Last modified: May 95]

Answer: Set the XmNmenuHistory resource on its XmRowColumn parent.

Ken Lee

buser@tartan.com (Mark) sent this code fragment:

Widget      menu;
int         num_buttons;
WidgetList  buttons;

XtVaGetValues( simple_option_widget, XmNsubMenuId, &menu, NULL);

XtVaGetValues( menu, XmNnumChildren, &num_buttons,
        XmNchildren, &buttons, NULL ) ;

and change current selection with:

XtVaSetValues( simple_option_widget, XmNmenuHistory, buttons[index], NULL ) ;

/* where index is between 0 and num_buttons */

Thanks to Phil Gehlich <pgehlich@hp7001.ecae.StorTek.COM> for a correction.

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Last Update July 25 2008 @ 00:12 AM