ScrolledList

Table of Contents

## NAME

ScrolledList - A Single Column Scrolling List Of Strings

## DESCRIPTION

ScrolledList is a simple, single column, scrolled list of text items, where selections can be made. The widget has callbacks to notify selection changes. The ScrolledList is build from the MultiList widget allowing the text highlight colors to be changed, and multiple items to be selected. This is a very incomplete widget -- read the RESTRICTIONS section below.

## CLASS HIERARCHY

Core Composite

## RESOURCES

Name
  Class Type Notes Default XtNwidth Width Dimension 200 XtNheight Height Dimension 500 XtNbackground Background Pixel white XtNlist Pointer char** NULL XtNnumberStrings NumberStrings Int 0 XtNsensitiveArray Pointer Boolean * NULL

XtNcallback
  Callback Callback NULL

## PUBLIC FUNCTIONS

void ScrolledListSetList(w,newlist,items,resize,sensitive_array) Widget w;
char **newlist;
int items;
Boolean resize;
Boolean *sensitive_array;

This routine tries to set the string array to the new array <newlist>. <items> is the count of strings. If <items> is 0 and the array is NULL terminated, the num ber of strings will be automatically counted. The <resize> flag indicates if we want the widget to try to resize itself to hold the new array. The <sensi tive_array> parameter (if non-NULL) contains an array of Booleans representing the sensitivity of the list items.

This routine is the primary interface to changing the data. The resources XtNlist, XtNnumberStrings, and XtNsensitiveArray can be changed in parallel, but all three values must be changed within a single SetValues call. It is better, and more flexible, to use this function interface.

void ScrolledListUnhighlightAll(w)
Widget w;

This routine unhighlights all highlighted items in the ScrolledList widget <w>.

void ScrolledListHighlightItem(w,item_index) Widget w;
int item_index;

This routine highlights the item with index number <item_index>.

ScrolledListReturnStruct *ScrolledListGetHighlighted(sw) ScrolledListWidget sw;

This routine returns the current highlighted items info.

int ScrolledListToggleItem(plw,item_index)
ScrolledListWidget plw;

This routine highlights the item with index <item_index> if it is unhighlighted and unhighlights it if it is already highlighted. The action performed by the toggle is returned (ScrolledList_ACTION_HIGHLIGHT or ScrolledList_ACTION_UNHIGHLIGHT).

Boolean ScrolledListIsHighlighted(w,item_index) Widget w;
int item_index;

This routine returns a boolean that indicates if the item with index <item_index> was highlighted or not.

Boolean ScrolledListGetItem(w,item_index,str_ptr,high_ptr,sens_ptr) Widget w;
int item_index;
String *str_ptr;
Boolean *high_ptr,*sens_ptr;

This routine returns information about a numbered item including the name of the item, whether it is high lighted, and its sensitivity. If the item index number does not correspond to an item, False is returned, else True is returned.

## RESTRICTIONS

For no good reason this widget is hard coded to only allow one item to be selected at a time. This is just a simple wrapper of a Viewport around a MultiList. Most of the work is performed by the MultiList widget. If you want different features, you may want to deal with the MultiList widget directly.

## AUTHOR

Brian Totty, totty@cs.uiuc.edu
Department of Computer Science,
University of Illinois at Urbana-Champaign 1304 W. Springfield Avenue
Urbana, IL 61801

Table of Contents

- NAME
- DESCRIPTION
- CLASS HIERARCHY
- RESOURCES
- PUBLIC FUNCTIONS
- RESTRICTIONS
- AUTHOR