git.sur5r.net Git - glabels/blob - 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 #include "color-combo-history.h"
  24
  25 #include "color.h"
  26
  27
  28 /*========================================================*/
  29 /* Private types.                                         */
  30 /*========================================================*/
  31
  32 /** GL_COLOR_COMBO_HISTORY Private fields */
  33 struct _glColorComboHistoryPrivate {
  34
  35         guint       max_n;
  36
  37         guint       n;
  38         guint      *color;
  39 };
  40
  41
  42 /*========================================================*/
  43 /* Private globals.                                       */
  44 /*========================================================*/
  45
  46
  47 /*========================================================*/
  48 /* Private function prototypes.                           */
  49 /*========================================================*/
  50
  51 static void gl_color_combo_history_finalize      (GObject             *object);
  52
  53
  54 /*****************************************************************************/
  55 /* Object infrastructure.                                                    */
  56 /*****************************************************************************/
  57 G_DEFINE_TYPE (glColorComboHistory, gl_color_combo_history, G_TYPE_OBJECT);
  58
  59
  60 /*****************************************************************************/
  61 /* Class Init Function.                                                      */
  62 /*****************************************************************************/
  63 static void
  64 gl_color_combo_history_class_init (glColorComboHistoryClass *class)
  65 {
  66         GObjectClass              *gobject_class = (GObjectClass *) class;
  67
  68         gl_color_combo_history_parent_class = g_type_class_peek_parent (class);
  69
  70         gobject_class->finalize = gl_color_combo_history_finalize;
  71 }
  72
  73
  74 /*****************************************************************************/
  75 /* Object Instance Init Function.                                            */
  76 /*****************************************************************************/
  77 static void
  78 gl_color_combo_history_init (glColorComboHistory *this)
  79 {
  80         this->priv = g_new0 (glColorComboHistoryPrivate, 1);
  81 }
  82
  83
  84 /*****************************************************************************/
  85 /* Finalize Method.                                                          */
  86 /*****************************************************************************/
  87 static void
  88 gl_color_combo_history_finalize (GObject *object)
  89 {
  90         glColorComboHistory    *this;
  91
  92         g_return_if_fail (object && IS_GL_COLOR_COMBO_HISTORY (object));
  93         this = GL_COLOR_COMBO_HISTORY (object);
  94
  95         g_free (this->priv->color);
  96         g_free (this->priv);
  97
  98         G_OBJECT_CLASS (gl_color_combo_history_parent_class)->finalize (object);
  99 }
 100
 101
 102 /*****************************************************************************/
 103 /** New Object Generator.                                                    */
 104 /*****************************************************************************/
 105 glColorComboHistory *
 106 gl_color_combo_history_new (guint n)
 107 {
 108         glColorComboHistory *this;
 109
 110         this = g_object_new (TYPE_GL_COLOR_COMBO_HISTORY, NULL);
 111
 112         this->priv->max_n = n;
 113         this->priv->n     = 0;
 114         if (n > 0)
 115         {
 116                 this->priv->color = g_new0 (guint, n);
 117         }
 118
 119         return this;
 120 }
 121
 122
 123 /*****************************************************************************/
 124 /* Add color to history.                                                     */
 125 /*****************************************************************************/
 126 void
 127 gl_color_combo_history_add_color (glColorComboHistory *this,
 128                                   guint                color)
 129 {
 130         guint i;
 131
 132         /*
 133          * First check for duplicate color.
 134          */
 135         for ( i=0; i < this->priv->n; i++ )
 136         {
 137                 if ( this->priv->color[i] == color )
 138                 {
 139                         return;
 140                 }
 141         }
 142
 143         /*
 144          * Simple case.
 145          */
 146         if ( this->priv->n < this->priv->max_n )
 147         {
 148                 this->priv->color[ this->priv->n ] = color;
 149                 this->priv->n++;
 150
 151                 return;
 152         }
 153
 154         /* Move colors down, dropping oldest. */
 155         for ( i=0; i < (this->priv->n - 1); i++ )
 156         {
 157                 this->priv->color[i] = this->priv->color[i+1];
 158         }
 159         this->priv->color[ this->priv->n - 1 ] = color;
 160 }
 161
 162 /*****************************************************************************/
 163 /* Get color.                                                                */
 164 /*****************************************************************************/
 165 guint
 166 gl_color_combo_history_get_color (glColorComboHistory *this,
 167                                   guint                i)
 168 {
 169         return this->priv->color[i];
 170 }
 171
 172
 173
 174 /*
 175  * Local Variables:       -- emacs
 176  * mode: C                -- emacs
 177  * c-basic-offset: 8      -- emacs
 178  * tab-width: 8           -- emacs
 179  * indent-tabs-mode: nil  -- emacs
 180  * End:                   -- emacs
 181  */