git.sur5r.net Git - glabels/blob - src/color-history-model.c

   1 /*
   2  *  color-history-model.c
   3  *  Copyright (C) 2008-2009  Jim Evins <evins@snaught.com>.
   4  *
   5  *  This file is part of gLabels.
   6  *
   7  *  gLabels is free software: you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation, either version 3 of the License, or
  10  *  (at your option) any later version.
  11  *
  12  *  gLabels is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with gLabels.  If not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include <config.h>
  22
  23 #include "color-history-model.h"
  24
  25 #include <gio/gio.h>
  26
  27 #include "marshal.h"
  28
  29
  30 /*========================================================*/
  31 /* Private types.                                         */
  32 /*========================================================*/
  33
  34 struct _glColorHistoryModelPrivate {
  35
  36         GSettings   *history;
  37
  38         guint        max_n;
  39 };
  40
  41 enum {
  42         CHANGED,
  43         LAST_SIGNAL
  44 };
  45
  46
  47 /*========================================================*/
  48 /* Private globals.                                       */
  49 /*========================================================*/
  50
  51 static guint signals[LAST_SIGNAL] = {0};
  52
  53
  54 /*========================================================*/
  55 /* Private function prototypes.                           */
  56 /*========================================================*/
  57
  58 static void    gl_color_history_model_finalize  (GObject             *object);
  59
  60 static void    history_changed_cb               (glColorHistoryModel *this);
  61
  62 static guint  *get_color_array                  (glColorHistoryModel *this,
  63                                                  guint               *n_elements);
  64 static void    set_color_array                  (glColorHistoryModel *this,
  65                                                  guint               *array,
  66                                                  guint                n_elements);
  67
  68
  69 /*****************************************************************************/
  70 /* Object infrastructure.                                                    */
  71 /*****************************************************************************/
  72 G_DEFINE_TYPE (glColorHistoryModel, gl_color_history_model, G_TYPE_OBJECT)
  73
  74
  75 /*****************************************************************************/
  76 /* Class Init Function.                                                      */
  77 /*****************************************************************************/
  78 static void
  79 gl_color_history_model_class_init (glColorHistoryModelClass *class)
  80 {
  81         GObjectClass  *gobject_class = (GObjectClass *) class;
  82
  83         gl_color_history_model_parent_class = g_type_class_peek_parent (class);
  84
  85         gobject_class->finalize = gl_color_history_model_finalize;
  86
  87         signals[CHANGED] =
  88                 g_signal_new ("changed",
  89                               G_OBJECT_CLASS_TYPE (gobject_class),
  90                               G_SIGNAL_RUN_LAST,
  91                               G_STRUCT_OFFSET (glColorHistoryModelClass, changed),
  92                               NULL, NULL,
  93                               gl_marshal_VOID__VOID,
  94                               G_TYPE_NONE,
  95                               0);
  96 }
  97
  98
  99 /*****************************************************************************/
 100 /* Object Instance Init Function.                                            */
 101 /*****************************************************************************/
 102 static void
 103 gl_color_history_model_init (glColorHistoryModel *this)
 104 {
 105         this->priv = g_new0 (glColorHistoryModelPrivate, 1);
 106
 107         this->priv->history = g_settings_new ("org.gnome.glabels-3.history");
 108
 109         g_return_if_fail (this->priv->history != NULL);
 110
 111         g_signal_connect_swapped (G_OBJECT (this->priv->history),
 112                                   "changed::recent-colors",
 113                                   G_CALLBACK (history_changed_cb), this);
 114 }
 115
 116
 117 /*****************************************************************************/
 118 /* Finalize Method.                                                          */
 119 /*****************************************************************************/
 120 static void
 121 gl_color_history_model_finalize (GObject *object)
 122 {
 123         glColorHistoryModel   *this;
 124
 125         g_return_if_fail (object && IS_GL_COLOR_HISTORY_MODEL (object));
 126         this = GL_COLOR_HISTORY_MODEL (object);
 127
 128         g_object_unref (G_OBJECT(this->priv->history));
 129         g_free (this->priv);
 130
 131         G_OBJECT_CLASS (gl_color_history_model_parent_class)->finalize (object);
 132 }
 133
 134
 135 /*****************************************************************************/
 136 /** New Object Generator.                                                    */
 137 /*****************************************************************************/
 138 glColorHistoryModel *
 139 gl_color_history_model_new (guint n)
 140 {
 141         glColorHistoryModel *this;
 142
 143         this = g_object_new (TYPE_GL_COLOR_HISTORY_MODEL, NULL);
 144
 145         this->priv->max_n = n;
 146
 147         return this;
 148 }
 149
 150
 151 /*****************************************************************************/
 152 /* Add color to history.                                                      */
 153 /*****************************************************************************/
 154 void
 155 gl_color_history_model_add_color (glColorHistoryModel *this,
 156                                   guint                color)
 157 {
 158         guint  *old;
 159         guint  *new;
 160         guint   i, n;
 161
 162         old = get_color_array (this, &n);
 163
 164         new = g_new0 (guint, this->priv->max_n);
 165
 166         new[0] = color;
 167
 168         for ( i = 0; (i < (this->priv->max_n-1)) && (i < n); i++ )
 169         {
 170                 new[i+1] = old[i];
 171         }
 172
 173         set_color_array (this, new, i+1);
 174
 175         g_free (old);
 176         g_free (new);
 177 }
 178
 179
 180 /*****************************************************************************/
 181 /* History changed callback.                                                 */
 182 /*****************************************************************************/
 183 static void
 184 history_changed_cb (glColorHistoryModel  *this)
 185 {
 186         g_signal_emit (G_OBJECT(this), signals[CHANGED], 0);
 187 }
 188
 189
 190 /*****************************************************************************/
 191 /* Get list of colors.                                                       */
 192 /*****************************************************************************/
 193 static guint *
 194 get_color_array (glColorHistoryModel *this,
 195                  guint               *n_elements)
 196 {
 197         GVariant *value;
 198         GVariant *child_value;
 199         gsize     i;
 200         guint    *array;
 201
 202         value = g_settings_get_value (this->priv->history, "recent-colors");
 203         *n_elements = g_variant_n_children (value);
 204
 205         array = g_new0 (guint, *n_elements);
 206
 207         for ( i = 0; i < *n_elements; i++ )
 208         {
 209                 child_value = g_variant_get_child_value (value, i);
 210                 array[i] = g_variant_get_uint32 (child_value);
 211                 g_variant_unref (child_value);
 212         }
 213
 214         g_variant_unref (value);
 215
 216         return array;
 217 }
 218
 219
 220 /*****************************************************************************/
 221 /* Set list of colors.                                                       */
 222 /*****************************************************************************/
 223 static void
 224 set_color_array (glColorHistoryModel *this,
 225                  guint               *array,
 226                  guint                n_elements)
 227 {
 228         GVariant  *value;
 229         GVariant **child_values;
 230         gsize      i;
 231
 232         child_values = g_new (GVariant *, n_elements);
 233
 234         for ( i = 0; i < n_elements; i++ )
 235         {
 236                 child_values[i] = g_variant_new_uint32 (array[i]);
 237         }
 238
 239         value = g_variant_new_array (G_VARIANT_TYPE_UINT32, child_values, n_elements);
 240
 241         g_settings_set_value (this->priv->history, "recent-colors", value);
 242
 243         g_free (child_values);
 244 }
 245
 246
 247 /*****************************************************************************/
 248 /* Get color.                                                                */
 249 /*****************************************************************************/
 250 guint
 251 gl_color_history_model_get_color (glColorHistoryModel *this,
 252                                   guint                i)
 253 {
 254         guint  *array;
 255         guint   color = 0;
 256         guint   n;
 257
 258         array = get_color_array (this, &n);
 259         if ( array && (i < n) )
 260         {
 261                 color = array[i];
 262         }
 263         g_free (array);
 264
 265         return color;
 266 }
 267
 268
 269
 270
 271 /*
 272  * Local Variables:       -- emacs
 273  * mode: C                -- emacs
 274  * c-basic-offset: 8      -- emacs
 275  * tab-width: 8           -- emacs
 276  * indent-tabs-mode: nil  -- emacs
 277  * End:                   -- emacs
 278  */