git.sur5r.net Git - glabels/blob - glabels2/src/color-combo-history.c

   1 /*
   2  *  color-combo-history.c
   3  *  Copyright (C) 2008  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
  24 #include "color-combo-history.h"
  25
  26 #include "color.h"
  27
  28
  29 /*========================================================*/
  30 /* Private types.                                         */
  31 /*========================================================*/
  32
  33 /** GL_COLOR_COMBO_HISTORY Private fields */
  34 struct _glColorComboHistoryPrivate {
  35
  36         guint       max_n;
  37
  38         guint       n;
  39         guint      *color;
  40 };
  41
  42
  43 /*========================================================*/
  44 /* Private globals.                                       */
  45 /*========================================================*/
  46
  47
  48 /*========================================================*/
  49 /* Private function prototypes.                           */
  50 /*========================================================*/
  51
  52 static void gl_color_combo_history_finalize      (GObject             *object);
  53
  54
  55 /*****************************************************************************/
  56 /* Object infrastructure.                                                    */
  57 /*****************************************************************************/
  58 G_DEFINE_TYPE (glColorComboHistory, gl_color_combo_history, G_TYPE_OBJECT);
  59
  60
  61 /*****************************************************************************/
  62 /* Class Init Function.                                                      */
  63 /*****************************************************************************/
  64 static void
  65 gl_color_combo_history_class_init (glColorComboHistoryClass *class)
  66 {
  67         GObjectClass              *gobject_class = (GObjectClass *) class;
  68         glColorComboHistoryClass  *object_class  = (glColorComboHistoryClass *) class;
  69
  70         gl_color_combo_history_parent_class = g_type_class_peek_parent (class);
  71
  72         gobject_class->finalize = gl_color_combo_history_finalize;
  73 }
  74
  75
  76 /*****************************************************************************/
  77 /* Object Instance Init Function.                                            */
  78 /*****************************************************************************/
  79 static void
  80 gl_color_combo_history_init (glColorComboHistory *this)
  81 {
  82         this->priv = g_new0 (glColorComboHistoryPrivate, 1);
  83 }
  84
  85
  86 /*****************************************************************************/
  87 /* Finalize Method.                                                          */
  88 /*****************************************************************************/
  89 static void
  90 gl_color_combo_history_finalize (GObject *object)
  91 {
  92         glColorComboHistory    *this;
  93
  94         g_return_if_fail (object && IS_GL_COLOR_COMBO_HISTORY (object));
  95         this = GL_COLOR_COMBO_HISTORY (object);
  96
  97         g_free (this->priv->color);
  98         g_free (this->priv);
  99
 100         G_OBJECT_CLASS (gl_color_combo_history_parent_class)->finalize (object);
 101 }
 102
 103
 104 /*****************************************************************************/
 105 /** New Object Generator.                                                    */
 106 /*****************************************************************************/
 107 glColorComboHistory *
 108 gl_color_combo_history_new (guint n)
 109 {
 110         glColorComboHistory *this;
 111
 112         this = g_object_new (TYPE_GL_COLOR_COMBO_HISTORY, NULL);
 113
 114         this->priv->max_n = n;
 115         this->priv->n     = 0;
 116         if (n > 0)
 117         {
 118                 this->priv->color = g_new0 (guint, n);
 119         }
 120
 121         return this;
 122 }
 123
 124
 125 /*****************************************************************************/
 126 /* Add color to history.                                                     */
 127 /*****************************************************************************/
 128 void
 129 gl_color_combo_history_add_color (glColorComboHistory *this,
 130                                   guint                color)
 131 {
 132         guint i;
 133
 134         /*
 135          * First check for duplicate color.
 136          */
 137         for ( i=0; i < this->priv->n; i++ )
 138         {
 139                 if ( this->priv->color[i] == color )
 140                 {
 141                         return;
 142                 }
 143         }
 144
 145         /*
 146          * Simple case.
 147          */
 148         if ( this->priv->n < this->priv->max_n )
 149         {
 150                 this->priv->color[ this->priv->n ] = color;
 151                 this->priv->n++;
 152
 153                 return;
 154         }
 155
 156         /* Move colors down, dropping oldest. */
 157         for ( i=0; i < (this->priv->n - 1); i++ )
 158         {
 159                 this->priv->color[i] = this->priv->color[i+1];
 160         }
 161         this->priv->color[ this->priv->n - 1 ] = color;
 162 }
 163
 164 /*****************************************************************************/
 165 /* Get color.                                                                */
 166 /*****************************************************************************/
 167 guint
 168 gl_color_combo_history_get_color (glColorComboHistory *this,
 169                                   guint                i)
 170 {
 171         return this->priv->color[i];
 172 }
 173
 174
 175
 176 /*
 177  * Local Variables:       -- emacs
 178  * mode: C                -- emacs
 179  * c-basic-offset: 8      -- emacs
 180  * tab-width: 8           -- emacs
 181  * indent-tabs-mode: nil  -- emacs
 182  * End:                   -- emacs
 183  */