Conference bulova::decw_jan-89_to_nov-90

2927.0. "LIST_BOX_WIDGET with a list of problems...." by BACHUS::RIJMENANTS (Dirk Rijmenants) Thu Jun 14 1990 05:05

Hi,

   The program below demonstrates some anoying problems with the listbox
   widget under v53...

     1) Single select doesn't always work...
        Extend select (shift+select) some items and then do a
        single (normal) select on the last item selected... the callback
        reason still is.... extend  (btw worked fine under 5.2)

     2) Select context sensitive help on any lit box (help+btn1)
        the items get larger, but the scroll bar is not adjusted...

     3) The area of an item that can be used to select an item is
        very limited on v53... on v52 the whole line could be used,
        is there a way to get this behaviour back ??


  Anyway thanks in advance for any reply...


                                  Dirk.

================================================================================

#include <stdio.h>
#include <decw$include:DwtAppl.h>

static Widget top_level_widget;
static Widget list_box_widget;
static Arg arglist[99];
static int arglist_count;
static DwtCompString items[99];
static int item_count;

static void list_box_callback(Widget w,
                              caddr_t client_data,
                              DwtListBoxCallbackStruct *callback_struct)
{
    static int help_called =0;
    switch (callback_struct->reason)
    {
         case DwtCRExtend:
              printf("list_box_callback with reason=%d DwtCRExtend\n",callback_struct->reason);
              break;
/*
         case DwtCRExtendConfirm:
              printf("list_box_callback with reason=%d DwtCRExtendConfirm\n",callback_struct->reason);
              break;
*/
         case DwtCRSingle:
              printf("list_box_callback with reason=%d DwtCRSingle\n",callback_struct->reason);
              break;
/*
         case DwtCRSingleConfirm:
              printf("list_box_callback with reason=%d DwtCRSingleConfirm\n",callback_struct->reason);
              break;
*/
         case DwtCRHelpRequested:
              printf("list_box_callback with reason=%d DwtCRHelpRequested\n",callback_struct->reason);
              for (item_count = 0; item_count < 20; ++item_count)
              { 
                   char buffer[256];
                   sprintf(buffer,"Item %s%d\n",(help_called== 0) ?"":"\n",item_count);
                   items[item_count] = DwtLatin1String(buffer);
              }
              arglist_count = 0;
              XtSetArg (arglist[arglist_count], DwtNitems, items);++arglist_count;
              XtSetArg (arglist[arglist_count], DwtNitemsCount, item_count);++arglist_count;
              XtSetArg (arglist[arglist_count], DwtNselectedItemsCount, 0);++arglist_count;
              XtSetValues (list_box_widget, arglist,arglist_count);
              ++help_called;
              break;
         default:
              printf ("list_box_callback with reason=%d\n",callback_struct->reason);
              break;
    }
}
main(int argc,char **argv)
{
    top_level_widget = XtInitialize ("bug","Bug",NULL,0,&argc,argv);
    for (item_count = 0; item_count < 20; ++item_count)
    {
         char buffer[256];
         sprintf (buffer, "Item %d                               ",item_count);
         items[item_count]=DwtLatin1String(buffer);
    }
         arglist_count =0;
         XtSetArg (arglist[arglist_count],DwtNsingleSelection,FALSE);++arglist_count;
         XtSetArg (arglist[arglist_count],DwtNvisibleItemsCount,10);++arglist_count;
         XtSetArg (arglist[arglist_count],DwtNwidth,200);++arglist_count;
         XtManageChild (list_box_widget= DwtListBoxCreate(top_level_widget,"ListBox",arglist,arglist_count));
         XtAddCallback (list_box_widget,DwtNsingleCallback,list_box_callback,NULL);                       
         XtAddCallback (list_box_widget,DwtNsingleConfirmCallback,list_box_callback,NULL);                       
         XtAddCallback (list_box_widget,DwtNextendCallback,list_box_callback,NULL);                       
         XtAddCallback (list_box_widget,DwtNextendConfirmCallback,list_box_callback,NULL);                       
         XtAddCallback (list_box_widget,DwtNhelpCallback,list_box_callback,NULL);                       

         arglist_count = 0;
         XtSetArg (arglist[arglist_count], DwtNitems, items);++arglist_count;
         XtSetArg (arglist[arglist_count], DwtNitemsCount, item_count);++arglist_count;
         XtSetArg (arglist[arglist_count], DwtNselectedItemsCount, 0);++arglist_count;
         XtSetValues (list_box_widget, arglist,arglist_count);

         XtRealizeWidget (top_level_widget);
         XtMainLoop ();
}