git.sur5r.net Git - glabels/blob - glabels2/src/label-barcode.c

   1 /*
   2  *  (GLABELS) Label and Business Card Creation program for GNOME
   3  *
   4  *  label_barcode.c:  GLabels label text object
   5  *
   6  *  Copyright (C) 2001-2002  Jim Evins <evins@snaught.com>.
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  21  */
  22
  23 #include <glib.h>
  24
  25 #include "label-barcode.h"
  26
  27 #include "pixmaps/checkerboard.xpm"
  28
  29 #include "debug.h"
  30
  31 /*========================================================*/
  32 /* Private macros and constants.                          */
  33 /*========================================================*/
  34
  35 /*========================================================*/
  36 /* Private types.                                         */
  37 /*========================================================*/
  38
  39 struct _glLabelBarcodePrivate {
  40         glTextNode     *text_node;
  41         gchar          *id;
  42         glColorNode    *color_node;
  43         gboolean        text_flag;
  44         gboolean        checksum_flag;
  45         guint           format_digits;
  46 };
  47
  48 /*========================================================*/
  49 /* Private globals.                                       */
  50 /*========================================================*/
  51
  52 static glLabelObjectClass *parent_class = NULL;
  53
  54 static guint instance = 0;
  55
  56 /*========================================================*/
  57 /* Private function prototypes.                           */
  58 /*========================================================*/
  59
  60 static void  gl_label_barcode_class_init    (glLabelBarcodeClass *klass);
  61 static void  gl_label_barcode_instance_init (glLabelBarcode      *lbc);
  62 static void  gl_label_barcode_finalize      (GObject             *object);
  63
  64 static void  copy                           (glLabelObject       *dst_object,
  65                                              glLabelObject       *src_object);
  66
  67 static void  get_size                       (glLabelObject       *object,
  68                                              gdouble             *w,
  69                                              gdouble             *h);
  70
  71 static void  set_line_color                 (glLabelObject       *object,
  72                                              glColorNode         *line_color);
  73
  74 static glColorNode *get_line_color           (glLabelObject       *object);
  75
  76
  77 \f
  78 /*****************************************************************************/
  79 /* Boilerplate object stuff.                                                 */
  80 /*****************************************************************************/
  81 GType
  82 gl_label_barcode_get_type (void)
  83 {
  84         static GType type = 0;
  85
  86         if (!type) {
  87                 static const GTypeInfo info = {
  88                         sizeof (glLabelBarcodeClass),
  89                         NULL,
  90                         NULL,
  91                         (GClassInitFunc) gl_label_barcode_class_init,
  92                         NULL,
  93                         NULL,
  94                         sizeof (glLabelBarcode),
  95                         0,
  96                         (GInstanceInitFunc) gl_label_barcode_instance_init,
  97                         NULL
  98                 };
  99
 100                 type = g_type_register_static (GL_TYPE_LABEL_OBJECT,
 101                                                "glLabelBarcode", &info, 0);
 102         }
 103
 104         return type;
 105 }
 106
 107 static void
 108 gl_label_barcode_class_init (glLabelBarcodeClass *klass)
 109 {
 110         GObjectClass       *object_class       = (GObjectClass *) klass;
 111         glLabelObjectClass *label_object_class = (glLabelObjectClass *) klass;
 112
 113         parent_class = g_type_class_peek_parent (klass);
 114
 115         label_object_class->copy           = copy;
 116         label_object_class->get_size       = get_size;
 117         label_object_class->set_line_color = set_line_color;
 118         label_object_class->get_line_color = get_line_color;
 119
 120         object_class->finalize = gl_label_barcode_finalize;
 121 }
 122
 123 static void
 124 gl_label_barcode_instance_init (glLabelBarcode *lbc)
 125 {
 126         lbc->private = g_new0 (glLabelBarcodePrivate, 1);
 127         lbc->private->color_node = gl_color_node_new_default ();
 128 }
 129
 130 static void
 131 gl_label_barcode_finalize (GObject *object)
 132 {
 133         glLabelBarcode *lbc;
 134
 135         g_return_if_fail (object && GL_IS_LABEL_BARCODE (object));
 136
 137         lbc = GL_LABEL_BARCODE (object);
 138
 139         gl_color_node_free (&(lbc->private->color_node));
 140         gl_text_node_free (&lbc->private->text_node);
 141         g_free (lbc->private);
 142
 143         G_OBJECT_CLASS (parent_class)->finalize (object);
 144 }
 145
 146 /*****************************************************************************/
 147 /* NEW label "text" object.                                               */
 148 /*****************************************************************************/
 149 GObject *
 150 gl_label_barcode_new (glLabel *label)
 151 {
 152         glLabelBarcode *lbc;
 153
 154         lbc = g_object_new (gl_label_barcode_get_type(), NULL);
 155
 156         gl_label_object_set_parent (GL_LABEL_OBJECT(lbc), label);
 157
 158         return G_OBJECT (lbc);
 159 }
 160
 161 /*****************************************************************************/
 162 /* Copy object contents.                                                     */
 163 /*****************************************************************************/
 164 static void
 165 copy (glLabelObject *dst_object,
 166       glLabelObject *src_object)
 167 {
 168         glLabelBarcode      *lbc     = (glLabelBarcode *)src_object;
 169         glLabelBarcode      *new_lbc = (glLabelBarcode *)dst_object;
 170         glTextNode          *text_node;
 171         gchar               *id;
 172         gboolean             text_flag;
 173         gboolean             checksum_flag;
 174         glColorNode         *color_node;
 175         guint                format_digits;
 176
 177         gl_debug (DEBUG_LABEL, "START");
 178
 179         g_return_if_fail (lbc && GL_IS_LABEL_BARCODE (lbc));
 180         g_return_if_fail (new_lbc && GL_IS_LABEL_BARCODE (new_lbc));
 181
 182         text_node = gl_label_barcode_get_data (lbc);
 183         gl_label_barcode_get_props (lbc, &id, &text_flag, &checksum_flag, &format_digits);
 184         color_node = get_line_color (src_object);
 185
 186         gl_label_barcode_set_data (new_lbc, text_node);
 187         gl_label_barcode_set_props (new_lbc, id, text_flag, checksum_flag, format_digits);
 188         set_line_color (dst_object, color_node);
 189
 190         gl_color_node_free (&color_node);
 191         gl_text_node_free (&text_node);
 192         g_free (id);
 193
 194         gl_debug (DEBUG_LABEL, "END");
 195 }
 196
 197
 198 /*****************************************************************************/
 199 /* Set object params.                                                        */
 200 /*****************************************************************************/
 201 void
 202 gl_label_barcode_set_data (glLabelBarcode *lbc,
 203                            glTextNode     *text_node)
 204 {
 205         gl_debug (DEBUG_LABEL, "START");
 206
 207         g_return_if_fail (lbc && GL_IS_LABEL_BARCODE (lbc));
 208
 209         if (!gl_text_node_equal (lbc->private->text_node, text_node)) {
 210
 211                 gl_text_node_free (&lbc->private->text_node);
 212                 lbc->private->text_node = gl_text_node_dup (text_node);
 213
 214                 gl_label_object_emit_changed (GL_LABEL_OBJECT(lbc));
 215
 216         }
 217
 218         gl_debug (DEBUG_LABEL, "END");
 219 }
 220
 221 void
 222 gl_label_barcode_set_props (glLabelBarcode *lbc,
 223                             gchar          *id,
 224                             gboolean        text_flag,
 225                             gboolean        checksum_flag,
 226                             guint           format_digits)
 227 {
 228         gl_debug (DEBUG_LABEL, "START");
 229
 230         g_return_if_fail (lbc && GL_IS_LABEL_BARCODE (lbc));
 231
 232         if ( ((lbc->private->id == NULL) && (id != NULL))
 233              || (g_strcasecmp (lbc->private->id, id) != 0)
 234              || (lbc->private->text_flag != text_flag)
 235              || (lbc->private->checksum_flag != checksum_flag)
 236              || (lbc->private->format_digits != format_digits)) {
 237
 238                 lbc->private->id               = g_strdup (id);
 239                 lbc->private->text_flag        = text_flag;
 240                 lbc->private->checksum_flag    = checksum_flag;
 241                 lbc->private->format_digits    = format_digits;
 242
 243                 gl_label_object_emit_changed (GL_LABEL_OBJECT(lbc));
 244
 245         }
 246
 247         gl_debug (DEBUG_LABEL, "END");
 248 }
 249
 250
 251 /*****************************************************************************/
 252 /* Get object params.                                                        */
 253 /*****************************************************************************/
 254 glTextNode *
 255 gl_label_barcode_get_data (glLabelBarcode *lbc)
 256 {
 257         g_return_val_if_fail (lbc && GL_IS_LABEL_BARCODE (lbc), NULL);
 258
 259         return gl_text_node_dup (lbc->private->text_node);
 260 }
 261
 262 void
 263 gl_label_barcode_get_props (glLabelBarcode *lbc,
 264                             gchar          **id,
 265                             gboolean       *text_flag,
 266                             gboolean       *checksum_flag,
 267                             guint          *format_digits)
 268 {
 269         g_return_if_fail (lbc && GL_IS_LABEL_BARCODE (lbc));
 270
 271         *id               = g_strdup (lbc->private->id);
 272         *text_flag        = lbc->private->text_flag;
 273         *checksum_flag    = lbc->private->checksum_flag;
 274         *format_digits    = lbc->private->format_digits;
 275 }
 276
 277 /*---------------------------------------------------------------------------*/
 278 /* PRIVATE.  Get object size method.                                         */
 279 /*---------------------------------------------------------------------------*/
 280 static void
 281 get_size (glLabelObject *object,
 282           gdouble       *w,
 283           gdouble       *h)
 284 {
 285         glLabelBarcode      *lbc = (glLabelBarcode *)object;
 286         gchar               *data;
 287         gdouble              w_parent, h_parent;
 288         glBarcode           *gbc;
 289
 290         gl_debug (DEBUG_LABEL, "START");
 291
 292         g_return_if_fail (lbc && GL_IS_LABEL_BARCODE (lbc));
 293
 294         (* parent_class->get_size) (object, &w_parent, &h_parent);
 295
 296
 297         if (lbc->private->text_node->field_flag) {
 298                 data = gl_barcode_default_digits (lbc->private->id,
 299                                                   lbc->private->format_digits);
 300         } else {
 301                 data = gl_text_node_expand (lbc->private->text_node, NULL);
 302         }
 303
 304         gbc = gl_barcode_new (lbc->private->id,
 305                               lbc->private->text_flag,
 306                               lbc->private->checksum_flag,
 307                               w_parent,
 308                               h_parent,
 309                               data);
 310
 311         if ( gbc == NULL ) {
 312                 /* Try again with default digits. */
 313                 data = gl_barcode_default_digits (lbc->private->id,
 314                                                   lbc->private->format_digits);
 315                 gbc = gl_barcode_new (lbc->private->id,
 316                                       lbc->private->text_flag,
 317                                       lbc->private->checksum_flag,
 318                                       w_parent,
 319                                       h_parent,
 320                                       data);
 321         }
 322
 323         *w = gbc->width;
 324         *h = gbc->height;
 325
 326         gl_barcode_free (&gbc);
 327         g_free (data);
 328
 329         gl_debug (DEBUG_LABEL, "END");
 330 }
 331
 332 /*---------------------------------------------------------------------------*/
 333 /* PRIVATE.  Set line color method.                                          */
 334 /*---------------------------------------------------------------------------*/
 335 static void
 336 set_line_color (glLabelObject *object,
 337                 glColorNode   *line_color_node)
 338 {
 339         glLabelBarcode *lbarcode = (glLabelBarcode *)object;
 340
 341         g_return_if_fail (lbarcode && GL_IS_LABEL_BARCODE (lbarcode));
 342
 343         if ( !gl_color_node_equal(lbarcode->private->color_node, line_color_node) ) {
 344
 345                 gl_color_node_free (&(lbarcode->private->color_node));
 346                 lbarcode->private->color_node = gl_color_node_dup (line_color_node);
 347                 gl_label_object_emit_changed (GL_LABEL_OBJECT(lbarcode));
 348         }
 349 }
 350
 351 /*---------------------------------------------------------------------------*/
 352 /* PRIVATE.  Get line color method.                                          */
 353 /*---------------------------------------------------------------------------*/
 354 static glColorNode*
 355 get_line_color (glLabelObject *object)
 356 {
 357         glLabelBarcode *lbarcode = (glLabelBarcode *)object;
 358
 359         g_return_if_fail (lbarcode && GL_IS_LABEL_BARCODE (lbarcode));
 360
 361         return gl_color_node_dup (lbarcode->private->color_node);
 362 }