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List.h

/* $XConsortium: List.h,v 1.22 94/04/17 20:12:17 kaleb Exp $ */

/*
Copyright (c) 1989, 1994  X Consortium

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Except as contained in this notice, the name of the X Consortium shall not be
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from the X Consortium.
*/

/*  This is the List widget, it is useful to display a list, without the
 *  overhead of having a widget for each item in the list.  It allows 
 *  the user to select an item in a list and notifies the application through
 *  a callback function.
 *
 *    Created:    8/13/88
 *    By:         Chris D. Peterson
 *                      MIT X Consortium
 */

#ifndef _XawList_h
#define _XawList_h

/***********************************************************************
 *
 * List Widget
 *
 ***********************************************************************/

#include "Xaw3dP.h"
#include <X11/Xaw3d/Simple.h>

/* Resources:

 Name            Class        RepType           Default Value
 ----            -----        -------           -------------
 background      Background         Pixel       XtDefaultBackground
 border                BorderColor  Pixel       XtDefaultForeground
 borderWidth           BorderWidth  Dimension   1
 callback            Callback           XtCallbackList  NULL       **6
 columnSpacing       Spacing            Dimension       6
 cursor                Cursor       Cursor            left_ptr
 cursorName      Cursor       String            NULL
 defaultColumns      Columns            int             2          **5
 destroyCallback     Callback       Pointer           NULL 
 font            Font         XFontStruct*      XtDefaultFont
 forceColumns        Columns            Boolean         False      **5
 foreground      Foreground         Pixel       XtDefaultForeground
 height                Height       Dimension   0          **1
 insensitiveBorder   Insensitive    Pixmap            Gray
 internalHeight        Height       Dimension   2
 internalWidth         Width        Dimension   4
 list                List               String *        NULL       **2
 longest             Longest            int             0          **3  **4
 mappedWhenManaged   MappedWhenManaged    Boolean           True
 numberStrings       NumberStrings      int             0          **4
 pasteBuffer         Boolean            Boolean         False
 pointerColor          Foreground         Pixel       XtDefaultForeground
 pointerColorBackground Background  Pixel       XtDefaultBackground
 rowSpacing          Spacing            Dimension       4
 sensitive       Sensitive          Boolean           True
 verticalList        Boolean            Boolean         False
 width                 Width        Dimension   0          **1
 x               Position           Position    0
 y               Position           Position    0

 **1 - If the Width or Height of the list widget is zero (0) then the value
       is set to the minimum size necessay to fit the entire list.

       If both Width and Height are zero then they are adjusted to fit the
       entire list that is created width the number of default columns 
       specified in the defaultColumns resource.

 **2 - This is an array of strings the specify elements of the list.
       This resource must be specified. 
       (What good is a list widget without a list??  :-)

 **3 - Longest is the length of the widest string in pixels.

 **4 - If either of these values are zero (0) then the list widget calculates
       the correct value. 

       (This allows you to make startup faster if you already have 
        this information calculated)

       NOTE: If the numberStrings value is zero the list must 
             be NULL terminated.

 **5 - By setting the List.Columns resource you can force the application to
       have a given number of columns.         
        
 **6 - This returns the name and index of the item selected in an 
       XawListReturnStruct that is pointed to by the client_data
       in the CallbackProc.

*/


/*
 * Value returned when there are no highlighted objects. 
 */

#define XAW_LIST_NONE -1      

#define XtCList "List"
#define XtCSpacing "Spacing"
#define XtCColumns "Columns"
#define XtCLongest "Longest"
#define XtCNumberStrings "NumberStrings"

#define XtNcursor "cursor"
#define XtNcolumnSpacing "columnSpacing"
#define XtNdefaultColumns "defaultColumns"
#define XtNforceColumns "forceColumns"
#define XtNlist "list"
#define XtNlongest "longest"
#define XtNnumberStrings "numberStrings"
#define XtNpasteBuffer "pasteBuffer"
#define XtNrowSpacing "rowSpacing"
#define XtNverticalList "verticalList"
 
#ifdef XAW_INTERNATIONALIZATION
#ifndef XtNfontSet
#define XtNfontSet "fontSet"
#endif
#ifndef XtCFontSet
#define XtCFontSet "FontSet"
#endif
#endif

/* Class record constants */

extern WidgetClass listWidgetClass;

typedef struct _ListClassRec *ListWidgetClass;
typedef struct _ListRec      *ListWidget;

/* The list return structure. */

typedef struct _XawListReturnStruct {
  String string;
  int list_index;
} XawListReturnStruct;

/******************************************************************
 *
 * Exported Functions
 *
 *****************************************************************/

_XFUNCPROTOBEGIN

/*    Function Name: XawListChange.
 *    Description: Changes the list being used and shown.
 *    Arguments: w - the list widget.
 *                 list - the new list.
 *                 nitems - the number of items in the list.
 *                 longest - the length (in Pixels) of the longest element
 *                           in the list.
 *                 resize - if TRUE the the list widget will
 *                          try to resize itself.
 *    Returns: none.
 *      NOTE:      If nitems of longest are <= 0 then they will be caluculated.
 *                 If nitems is <= 0 then the list needs to be NULL terminated.
 */

extern void XawListChange(
#if NeedFunctionPrototypes
    Widget        /* w */,
    String*       /* list */,
    int                 /* nitems */,
    int                 /* longest */,
#if NeedWidePrototypes
    /* Boolean */ int   /* resize */
#else
    Boolean       /* resize */
#endif
#endif
);

/*    Function Name: XawListUnhighlight
 *    Description: unlights the current highlighted element.
 *    Arguments: w - the widget.
 *    Returns: none.
 */

extern void XawListUnhighlight(
#if NeedFunctionPrototypes
    Widget        /* w */
#endif
);

/*    Function Name: XawListHighlight
 *    Description: Highlights the given item.
 *    Arguments: w - the list widget.
 *                 item - the item to highlight.
 *    Returns: none.
 */

extern void XawListHighlight(
#if NeedFunctionPrototypes
    Widget        /* w */,
    int                 /* item */
#endif
);


/*    Function Name: XawListShowCurrent
 *    Description: returns the currently highlighted object.
 *    Arguments: w - the list widget.
 *    Returns: the info about the currently highlighted object.
 */

extern XawListReturnStruct * XawListShowCurrent(
#if NeedFunctionPrototypes
    Widget        /* w */
#endif
);

_XFUNCPROTOEND

#endif /* _XawList_h */

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