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Tina5/tina-tools/tinatool/wdgts/gtk/wdgtsGtk_tw_ivalue.c

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  1 /**********
  2  * 
  3  * Copyright (c) 2003, Division of Imaging Science and Biomedical Engineering,
  4  * University of Manchester, UK.  All rights reserved.
  5  * 
  6  * Redistribution and use in source and binary forms, with or without modification, 
  7  * are permitted provided that the following conditions are met:
  8  * 
  9  *   . Redistributions of source code must retain the above copyright notice, 
 10  *     this list of conditions and the following disclaimer.
 11  *    
 12  *   . Redistributions in binary form must reproduce the above copyright notice,
 13  *     this list of conditions and the following disclaimer in the documentation 
 14  *     and/or other materials provided with the distribution.
 15  * 
 16  *   . Neither the name of the University of Manchester nor the names of its
 17  *     contributors may be used to endorse or promote products derived from this 
 18  *     software without specific prior written permission.
 19  * 
 20  * 
 21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
 22  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
 23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
 24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 
 25  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
 26  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
 27  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 28  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
 29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
 30  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
 31  * POSSIBILITY OF SUCH DAMAGE.
 32  *
 33  **********
 34  * 
 35  * Program :  TINA
 36  * File    :  $Source: /home/tina/cvs/tina-tools/tinatool/wdgts/gtk/wdgtsGtk_tw_ivalue.c,v $
 37  * Date    :  $Date: 2007/02/15 01:55:50 $
 38  * Version :  $Revision: 1.3 $
 39  * CVS Id  :  $Id: wdgtsGtk_tw_ivalue.c,v 1.3 2007/02/15 01:55:50 paul Exp $
 40  *
 41  * Author  :  a.lacey@man.ac.uk, giob@man.ac.uk
 42  *
 43  *********
 44 */
 45 /** 
 46  *  @file  wdgtsGtk_tw_ivalue.c
 47  *  @brief Define and create GTK integer entry field and its associated callbacks.
 48  *
 49  *  Functions to create a GTK integer entry field and to define its use by linking it into the TINA 
 50  *  the TINA callback system using a Tw_callback struct.  Also defines the callback functions
 51  *  invoked when the buttons are used.  Note that an integer entry field in GTK is just a text
 52  *  entry field, but TINA handles it differently.
 53  *  tw_ivalue differs from tw_iglobal in that the latter uses a pointer to locate the global
 54  *  data whereas the former uses setter and getter functions.  Both forms are used in the Xv
 55  *  Tina and both are retained to maximise cross-compatibility in the Gtk Tina.
 56  *
 57  *  Note that the functions in this file are duplicated for each widget set (xv, GTK, xm, etc ...).
 58  *
 59  */
 60 
 61 #include "wdgtsGtk_tw_ivalue.h"
 62 
 63 #if HAVE_CONFIG_H
 64 #   include <config.h>
 65 #endif
 66 
 67 #include <stdio.h>
 68 #include <gtk/gtk.h>
 69 #include <tinatool/wdgts/gtk/wdgts_GtkDef.h>
 70 #include <tinatool/wdgts/gtk/wdgtsGtk_tw_command.h>
 71 #include <tinatool/wdgts/gtk/wdgtsGtk_tw_tool.h>
 72 
 73 
 74 /**
 75  * @brief Copy integer from entry widget to stored callback data field.  
 76  * @param twc  Pointer to Tw_callback associated with this integer entry widget.
 77  * 
 78  * Callback function for integer entry widgets.  Each of these has an associated 
 79  * Tw_callback, and this function uses a setter function stored in the data field 
 80  * of the Tw_callback to copy the current widget integer to the desired variable.
 81  *
 82  * Note that this callback is not invoked directly by the widget, but via a call
 83  * to tw_text_callback (in wdgtsGtk_tw_command.c).
 84  */
 85 static void ivalue_call(Tw_callback * twc)
 86 {
 87   int    x; 
 88   void (*set)() = (void (*) ()) twc->data2;
 89   char  *string = (char *) gtk_entry_get_text(GTK_ENTRY(twc->widget));
 90 
 91   if (sscanf(string, "%d", &x) == 1)
 92     (*set) (x);
 93 }
 94 
 95 /**
 96  * @brief   Replay integer entry from current macro file.  
 97  * @param   twc   Pointer to Tw_callback associated with this widget.
 98  * @param   args  Pointer to required data, stored in the macro file.
 99  * 
100  */
101 static void ivalue_cmnd(Tw_callback * twc, char *args)
102 {
103   int    x;
104   void (*set)() = (void (*) ()) twc->data2;
105   char   string[64];
106 
107   (void) sscanf(args, "%*s %d", &x);
108   (*set) (x);
109   (void) sscanf(args, "%*s %s", string);
110   gtk_entry_set_text(GTK_ENTRY(twc->widget), string);
111 }
112 
113 /**
114  * @brief  Record integer entry in current macro file.  
115  * @param  fp   Pointer to current macro file.
116  * @param  twc  Pointer to Tw_callback associated with this widget.
117  *
118  */
119 static void ivalue_prnt(FILE * fp, Tw_callback * twc)
120 {
121   int (*get)() = (int (*) ()) twc->data1;
122 
123   (void) fprintf(fp, "%s %d\n", twc->name, (*get)());
124 }
125 
126 
127 /**
128  * @brief  Create new integer entry field and its associated callback struct.  
129  * @param  name    String to be used as entry field identifier and label.
130  * @param  get()   Pointer to getter function for integer entered in the field.
131  * @param  set()   Pointer to setter function for integer entered in the field.
132  * @param  nchars  Maximum number of characters for input field.
133  * @return Tw_callback  Pointer to new Tw_callback associated with this entry field.
134  * 
135  * Creates new hbox for integer entry field, and packs field and label in it.  
136  *
137  * Invokes callback for each keypress, via call to tw_text_callback 
138  * (in wdgtsGtk_tw_command.c).
139  *
140  */
141 Tw_callback *tw_ivalue(char *name, int (*get)(), void (*set)(), int nchars)
142 {
143   GtkWidget *panel= tw_get_panel();
144   GtkWidget *box;
145   GtkWidget *itxlabel;
146   GtkWidget *itxentry;
147 
148   char  string[32];
149 
150   Tw_callback  *twc;
151   char         *fullname = tw_extend_fullname(tw_get_toolname(), name);
152 
153   box = gtk_hbox_new(FALSE, 8);
154   gtk_container_add(GTK_CONTAINER(panel), box);
155   gtk_widget_show(box); 
156         
157   itxlabel = gtk_label_new(name);
158   itxentry = gtk_entry_new();
159   gtk_widget_set_usize(itxentry, (10+6*nchars), 22);
160   gtk_box_pack_start(GTK_BOX(box), itxlabel, FALSE, FALSE, 0);
161   gtk_box_pack_start(GTK_BOX(box), itxentry, FALSE, FALSE, 0);
162   gtk_widget_show(itxlabel);
163   gtk_widget_show(itxentry);
164   
165   (void) sprintf(string, "%d", (*get) ());
166   gtk_entry_set_text(GTK_ENTRY(itxentry), string);
167 
168   twc = tw_callback_make(fullname, itxentry,
169                          ivalue_call, ivalue_cmnd, ivalue_prnt, (void (*) ()) NULL,
170                          (void *) get, (void *) set);
171 
172   /*  Invoke callback for GTK entry "changed" event (i.e. for each keypress) */
173   gtk_signal_connect(GTK_OBJECT(itxentry), "changed",
174                      GTK_SIGNAL_FUNC(tw_gtk_callback),
175                      (gpointer) twc);
176   
177   return (twc);
178 }
179         
180 /**
181  * @brief Reset integer entry field when value has been altered in the program.  
182  * @param twc    Pointer to Tw_callback associated with this text entry widget.
183  * 
184  * NOTE: NOT TESTED YET - GAB 10 Oct 2003.
185  *
186  */
187 void tw_ivalue_reset(Tw_callback * twc)
188 {
189   int    (*get)();
190   char    string[64];
191 
192   if (twc == NULL)
193     return;
194 
195   get = (int (*)()) twc->data1;
196   (void) sprintf(string, "%d", get());
197   gtk_entry_set_text(GTK_ENTRY(twc->widget), string);
198 }
199 

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