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 #include <libgnomeprint/gnome-glyphlist.h>
  25
  26 #include "label-barcode.h"
  27
  28 #include "pixmaps/checkerboard.xpm"
  29
  30 #include "debug.h"
  31
  32 /*========================================================*/
  33 /* Private macros and constants.                          */
  34 /*========================================================*/
  35
  36 /*========================================================*/
  37 /* Private types.                                         */
  38 /*========================================================*/
  39
  40 struct _glLabelBarcodePrivate {
  41         glTextNode     *text_node;
  42         gchar          *id;
  43         guint           color;
  44         gboolean        text_flag;
  45         gboolean        checksum_flag;
  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                                              guint                line_color);
  73
  74 static guint 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                 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                 };
  98
  99                 type = g_type_register_static (GL_TYPE_LABEL_OBJECT,
 100                                                "glLabelBarcode", &info, 0);
 101         }
 102
 103         return type;
 104 }
 105
 106 static void
 107 gl_label_barcode_class_init (glLabelBarcodeClass *klass)
 108 {
 109         GObjectClass       *object_class       = (GObjectClass *) klass;
 110         glLabelObjectClass *label_object_class = (glLabelObjectClass *) klass;
 111
 112         parent_class = g_type_class_peek_parent (klass);
 113
 114         label_object_class->copy           = copy;
 115         label_object_class->get_size       = get_size;
 116         label_object_class->set_line_color = set_line_color;
 117         label_object_class->get_line_color = get_line_color;
 118
 119         object_class->finalize = gl_label_barcode_finalize;
 120 }
 121
 122 static void
 123 gl_label_barcode_instance_init (glLabelBarcode *lbc)
 124 {
 125         lbc->private = g_new0 (glLabelBarcodePrivate, 1);
 126 }
 127
 128 static void
 129 gl_label_barcode_finalize (GObject *object)
 130 {
 131         glLabelBarcode *lbc;
 132
 133         g_return_if_fail (object && GL_IS_LABEL_BARCODE (object));
 134
 135         lbc = GL_LABEL_BARCODE (object);
 136
 137         gl_text_node_free (&lbc->private->text_node);
 138         g_free (lbc->private);
 139
 140         G_OBJECT_CLASS (parent_class)->finalize (object);
 141 }
 142
 143 /*****************************************************************************/
 144 /* NEW label "text" object.                                               */
 145 /*****************************************************************************/
 146 GObject *
 147 gl_label_barcode_new (glLabel *label)
 148 {
 149         glLabelBarcode *lbc;
 150
 151         lbc = g_object_new (gl_label_barcode_get_type(), NULL);
 152
 153         gl_label_object_set_parent (GL_LABEL_OBJECT(lbc), label);
 154
 155         return G_OBJECT (lbc);
 156 }
 157
 158 /*****************************************************************************/
 159 /* Copy object contents.                                                     */
 160 /*****************************************************************************/
 161 static void
 162 copy (glLabelObject *dst_object,
 163       glLabelObject *src_object)
 164 {
 165         glLabelBarcode      *lbc     = (glLabelBarcode *)src_object;
 166         glLabelBarcode      *new_lbc = (glLabelBarcode *)dst_object;
 167         glTextNode          *text_node;
 168         gchar               *id;
 169         gboolean             text_flag;
 170         gboolean             checksum_flag;
 171         guint                color;
 172
 173         gl_debug (DEBUG_LABEL, "START");
 174
 175         g_return_if_fail (lbc && GL_IS_LABEL_BARCODE (lbc));
 176         g_return_if_fail (new_lbc && GL_IS_LABEL_BARCODE (new_lbc));
 177
 178         text_node = gl_label_barcode_get_data (lbc);
 179         gl_label_barcode_get_props (lbc, &id, &text_flag, &checksum_flag);
 180         color = get_line_color (src_object);
 181
 182         gl_label_barcode_set_data (new_lbc, text_node);
 183         gl_label_barcode_set_props (new_lbc, id, text_flag, checksum_flag);
 184         set_line_color (dst_object, color);
 185
 186         gl_text_node_free (&text_node);
 187         g_free (id);
 188
 189         gl_debug (DEBUG_LABEL, "END");
 190 }
 191
 192
 193 /*****************************************************************************/
 194 /* Set object params.                                                        */
 195 /*****************************************************************************/
 196 void
 197 gl_label_barcode_set_data (glLabelBarcode *lbc,
 198                            glTextNode     *text_node)
 199 {
 200         gl_debug (DEBUG_LABEL, "START");
 201
 202         g_return_if_fail (lbc && GL_IS_LABEL_BARCODE (lbc));
 203
 204         gl_text_node_free (&lbc->private->text_node);
 205         lbc->private->text_node = gl_text_node_dup (text_node);
 206
 207         gl_label_object_emit_changed (GL_LABEL_OBJECT(lbc));
 208
 209         gl_debug (DEBUG_LABEL, "END");
 210 }
 211
 212 void
 213 gl_label_barcode_set_props (glLabelBarcode *lbc,
 214                             gchar          *id,
 215                             gboolean        text_flag,
 216                             gboolean        checksum_flag)
 217 {
 218         gl_debug (DEBUG_LABEL, "START");
 219
 220         g_return_if_fail (lbc && GL_IS_LABEL_BARCODE (lbc));
 221
 222         lbc->private->id               = g_strdup (id);
 223         lbc->private->text_flag        = text_flag;
 224         lbc->private->checksum_flag    = checksum_flag;
 225
 226         gl_label_object_emit_changed (GL_LABEL_OBJECT(lbc));
 227
 228         gl_debug (DEBUG_LABEL, "END");
 229 }
 230
 231
 232 /*****************************************************************************/
 233 /* Get object params.                                                        */
 234 /*****************************************************************************/
 235 glTextNode *
 236 gl_label_barcode_get_data (glLabelBarcode *lbc)
 237 {
 238         g_return_val_if_fail (lbc && GL_IS_LABEL_BARCODE (lbc), NULL);
 239
 240         return gl_text_node_dup (lbc->private->text_node);
 241 }
 242
 243 void
 244 gl_label_barcode_get_props (glLabelBarcode *lbc,
 245                             gchar          **id,
 246                             gboolean       *text_flag,
 247                             gboolean       *checksum_flag)
 248 {
 249         g_return_if_fail (lbc && GL_IS_LABEL_BARCODE (lbc));
 250
 251         *id               = g_strdup (lbc->private->id);
 252         *text_flag        = lbc->private->text_flag;
 253         *checksum_flag    = lbc->private->checksum_flag;
 254 }
 255
 256 /*---------------------------------------------------------------------------*/
 257 /* PRIVATE.  Get object size method.                                         */
 258 /*---------------------------------------------------------------------------*/
 259 static void
 260 get_size (glLabelObject *object,
 261           gdouble       *w,
 262           gdouble       *h)
 263 {
 264         glLabelBarcode      *lbc = (glLabelBarcode *)object;
 265         gchar               *data;
 266         gdouble              w_parent, h_parent;
 267         glBarcode           *gbc;
 268
 269         gl_debug (DEBUG_LABEL, "START");
 270
 271         g_return_if_fail (lbc && GL_IS_LABEL_BARCODE (lbc));
 272
 273         (* parent_class->get_size) (object, &w_parent, &h_parent);
 274
 275
 276         if (lbc->private->text_node->field_flag) {
 277                 data = gl_barcode_default_digits (lbc->private->id);
 278         } else {
 279                 data = gl_text_node_expand (lbc->private->text_node, NULL);
 280         }
 281
 282         gbc = gl_barcode_new (lbc->private->id,
 283                               lbc->private->text_flag,
 284                               lbc->private->checksum_flag,
 285                               w_parent,
 286                               h_parent,
 287                               data);
 288
 289         if ( gbc == NULL ) {
 290                 /* Try again with default digits. */
 291                 data = gl_barcode_default_digits (lbc->private->id);
 292                 gbc = gl_barcode_new (lbc->private->id,
 293                                       lbc->private->text_flag,
 294                                       lbc->private->checksum_flag,
 295                                       w_parent,
 296                                       h_parent,
 297                                       data);
 298         }
 299
 300         *w = gbc->width;
 301         *h = gbc->height;
 302
 303         gl_barcode_free (&gbc);
 304         g_free (data);
 305
 306         gl_debug (DEBUG_LABEL, "END");
 307 }
 308
 309 /*---------------------------------------------------------------------------*/
 310 /* PRIVATE.  Set line color method.                                          */
 311 /*---------------------------------------------------------------------------*/
 312 static void
 313 set_line_color (glLabelObject *object,
 314                 guint          line_color)
 315 {
 316         glLabelBarcode *lbarcode = (glLabelBarcode *)object;
 317
 318         g_return_if_fail (lbarcode && GL_IS_LABEL_BARCODE (lbarcode));
 319
 320         if ( lbarcode->private->color != line_color ) {
 321                 lbarcode->private->color = line_color;
 322                 gl_label_object_emit_changed (GL_LABEL_OBJECT(lbarcode));
 323         }
 324 }
 325
 326 /*---------------------------------------------------------------------------*/
 327 /* PRIVATE.  Get line color method.                                          */
 328 /*---------------------------------------------------------------------------*/
 329 static guint
 330 get_line_color (glLabelObject *object)
 331 {
 332         glLabelBarcode *lbarcode = (glLabelBarcode *)object;
 333
 334         g_return_if_fail (lbarcode && GL_IS_LABEL_BARCODE (lbarcode));
 335
 336         return lbarcode->private->color;
 337 }
 338