cde/programs/dtprintinfo/libUI/MotifUI/ComboBoxObj.C

   1 /*
   2  * CDE - Common Desktop Environment
   3  *
   4  * Copyright (c) 1993-2012, The Open Group. All rights reserved.
   5  *
   6  * These libraries and programs are free software; you can
   7  * redistribute them and/or modify them under the terms of the GNU
   8  * Lesser General Public License as published by the Free Software
   9  * Foundation; either version 2 of the License, or (at your option)
  10  * any later version.
  11  *
  12  * These libraries and programs are distributed in the hope that
  13  * they will be useful, but WITHOUT ANY WARRANTY; without even the
  14  * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
  15  * PURPOSE. See the GNU Lesser General Public License for more
  16  * details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with these libraries and programs; if not, write
  20  * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
  21  * Floor, Boston, MA 02110-1301 USA
  22  */
  23 /* $XConsortium: ComboBoxObj.C /main/4 1995/11/06 09:39:21 rswiston $ */
  24 /*                                                                      *
  25  * (c) Copyright 1993, 1994 Hewlett-Packard Company                     *
  26  * (c) Copyright 1993, 1994 International Business Machines Corp.       *
  27  * (c) Copyright 1993, 1994 Sun Microsystems, Inc.                      *
  28  * (c) Copyright 1993, 1994 Novell, Inc.                                *
  29  */
  30
  31 #include "ComboBoxObj.h"
  32
  33 #include <Xm/Label.h>
  34 #include <Xm/Form.h>
  35 #include <Xm/List.h>
  36 #include <Xm/ComboBox.h>
  37
  38 ComboBoxObj::ComboBoxObj(MotifUI *parent,
  39 #if defined(USL)
  40                          void (*callback)(ComboBoxObj *, char *, int),
  41 #else
  42                          ComboBoxCallback callback,
  43 #endif
  44                          char *name,
  45                          char **items,
  46                          int n_items)
  47         : MotifUI(parent, name, NULL)
  48 {
  49    XmString *items_list;
  50    int itemCount;
  51    if (items && n_items)
  52     {
  53       items_list = new XmString [n_items];
  54       int i;
  55       if (n_items > 8)
  56          itemCount = 8;
  57       else
  58          itemCount = n_items;
  59       for (i = 0; i < n_items; i++)
  60          items_list[i] = StringCreate(items[i]);
  61     }
  62    else
  63       items_list = NULL;
  64    _callback = callback;
  65    if (name)
  66     {
  67       XmString xm_string = StringCreate(name);
  68       _w = XtVaCreateManagedWidget("form", xmFormWidgetClass,
  69                                    parent->InnerWidget(), NULL);
  70       _label = XtVaCreateManagedWidget("form", xmLabelWidgetClass,
  71                                        _w, XmNlabelString, xm_string,
  72                                        XmNtopAttachment, XmATTACH_FORM,
  73                                        XmNbottomAttachment, XmATTACH_FORM,
  74                                        XmNleftAttachment, XmATTACH_FORM, NULL);
  75       _combo_box = XtVaCreateManagedWidget("combo_box", xmComboBoxWidgetClass,
  76                                            _w, XmNleftWidget, _label,
  77                                            XmNleftAttachment, XmATTACH_WIDGET,
  78                                            XmNrightAttachment, XmATTACH_FORM,
  79                                            XmNtopAttachment, XmATTACH_FORM,
  80                                            XmNbottomAttachment, XmATTACH_FORM,
  81                                            XmNcomboBoxType, XmDROP_DOWN_LIST,
  82                                            (items_list ? XmNitems : NULL),
  83                                               items_list,
  84                                            XmNitemCount, n_items,
  85                                            XmNvisibleItemCount, itemCount,
  86                                            NULL);
  87       StringFree(xm_string);
  88     }
  89    else
  90     {
  91       _w = XtVaCreateManagedWidget("combo_box", xmComboBoxWidgetClass,
  92                                    parent->InnerWidget(),
  93                                    XmNcomboBoxType, XmDROP_DOWN_LIST,
  94                                    (items_list ? XmNitems : NULL), items_list,
  95                                    XmNitemCount, n_items,
  96                                    XmNvisibleItemCount, itemCount, NULL);
  97       _label = NULL;
  98       _combo_box = _w;
  99     }
 100    _list = XtNameToWidget(_combo_box, "*List");
 101    XtAddCallback(_combo_box, XmNselectionCallback, &ComboBoxObj::SelectCB,
 102                  (XtPointer)this);
 103    if (items_list)
 104     {
 105       int i;
 106       for (i = 0; i < n_items; i++)
 107          StringFree(items_list[i]);
 108       delete items_list;
 109     }
 110 }
 111
 112 char * ComboBoxObj::Item(int item)
 113 {
 114    XmString *items;
 115    int n_items;
 116    XtVaGetValues(_list, XmNitems, &items, XmNitemCount, &n_items, NULL);
 117    if (item < 0 || item > n_items - 1)
 118       return NULL;
 119    else
 120       return StringExtract(items[item + 1]);
 121 }
 122
 123 char * ComboBoxObj::Item(char *item)
 124 {
 125    XmString value = StringCreate(item);
 126    int n = XmListItemExists(_list, value);
 127    StringFree(value);
 128    if (n)
 129       return item;
 130    else
 131       return NULL;
 132 }
 133
 134 void ComboBoxObj::Add(char *item)
 135 {
 136    XmString value = StringCreate(item);
 137    XmComboBoxAddItem(_combo_box, value, 0, True);
 138    StringFree(value);
 139 }
 140
 141 void ComboBoxObj::Delete(char *item)
 142 {
 143    XmString value = StringCreate(item);
 144    int n = XmListItemPos(_list, value);
 145    if (n)
 146       XmComboBoxDeletePos(_combo_box, n);
 147    StringFree(value);
 148 }
 149
 150 void ComboBoxObj::SelectCB(Widget, XtPointer client_data, XtPointer call_data)
 151 {
 152    ComboBoxObj *obj = (ComboBoxObj *) client_data;
 153    XmComboBoxCallbackStruct * cb = (XmComboBoxCallbackStruct *)call_data;
 154    if (obj->_callback)
 155     {
 156       char *item = obj->StringExtract(cb->item_or_text);
 157       (*obj->_callback)(obj, item, cb->item_position);
 158       XtFree(item);
 159     }
 160 }