gimp/modules/colorsel_cmyk.c

/* GIMP CMYK ColorSelector
 * Copyright (C) 2003  Sven Neumann <sven@gimp.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include "config.h"

#include <gtk/gtk.h>

#include "libgimpcolor/gimpcolor.h"
#include "libgimpmodule/gimpmodule.h"
#include "libgimpwidgets/gimpwidgets.h"

#include "libgimp/libgimp-intl.h"


/* definitions and variables */

#define COLORSEL_TYPE_CMYK            (colorsel_cmyk_type)
#define COLORSEL_CMYK(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), COLORSEL_TYPE_CMYK, ColorselCmyk))
#define COLORSEL_CMYK_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), COLORSEL_TYPE_CMYK, ColorselCmykClass))
#define COLORSEL_IS_CMYK(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), COLORSEL_TYPE_CMYK))
#define COLORSEL_IS_CMYK_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), COLORSEL_TYPE_CMYK))


typedef struct _ColorselCmyk      ColorselCmyk;
typedef struct _ColorselCmykClass ColorselCmykClass;

struct _ColorselCmyk
{
  GimpColorSelector  parent_instance;

  GimpCMYK           cmyk;
  GtkAdjustment     *adj[4];
};

struct _ColorselCmykClass
{
  GimpColorSelectorClass  parent_class;
};


static GType  colorsel_cmyk_get_type   (GTypeModule       *module);
static void   colorsel_cmyk_class_init (ColorselCmykClass *klass);
static void   colorsel_cmyk_init       (ColorselCmyk      *cmyk);

static void   colorsel_cmyk_set_color  (GimpColorSelector *selector,
                                        const GimpRGB     *rgb,
                                        const GimpHSV     *hsv);
static void   colorsel_cmyk_adj_update (GtkAdjustment     *adj,
                                        ColorselCmyk      *module);


static const GimpModuleInfo colorsel_cmyk_info =
{
  GIMP_MODULE_ABI_VERSION,
  N_("CMYK color selector"),
  "Sven Neumann <sven@gimp.org>",
  "v0.1",
  "(c) 2003, released under the GPL",
  "July 2003"
};

static GType colorsel_cmyk_type = 0;


G_MODULE_EXPORT const GimpModuleInfo *
gimp_module_query (GTypeModule *module)
{
  return &colorsel_cmyk_info;
}

G_MODULE_EXPORT gboolean
gimp_module_register (GTypeModule *module)
{
  colorsel_cmyk_get_type (module);

  return TRUE;
}

static GType
colorsel_cmyk_get_type (GTypeModule *module)
{
  if (! colorsel_cmyk_type)
    {
      static const GTypeInfo select_info =
      {
        sizeof (ColorselCmykClass),
	(GBaseInitFunc) NULL,
	(GBaseFinalizeFunc) NULL,
	(GClassInitFunc) colorsel_cmyk_class_init,
	NULL,           /* class_finalize */
	NULL,           /* class_data     */
	sizeof (ColorselCmyk),
	0,              /* n_preallocs    */
	(GInstanceInitFunc) colorsel_cmyk_init,
      };

      colorsel_cmyk_type =
        g_type_module_register_type (module,
                                     GIMP_TYPE_COLOR_SELECTOR,
                                     "ColorselCmyk",
                                     &select_info, 0);
    }

  return colorsel_cmyk_type;
}

static void
colorsel_cmyk_class_init (ColorselCmykClass *klass)
{
  GimpColorSelectorClass *selector_class;

  selector_class = GIMP_COLOR_SELECTOR_CLASS (klass);

  selector_class->name        = _("_CMYK");
  selector_class->help_page   = "cmyk.html";
  selector_class->stock_id    = GTK_STOCK_PRINT;  /* FIXME */
  selector_class->set_color   = colorsel_cmyk_set_color;
}

static void
colorsel_cmyk_init (ColorselCmyk *module)
{
  GtkWidget *table;
  gint       i;

  static const gchar *cmyk_labels[] =
  {
    N_("_C"),
    N_("_M"),
    N_("_Y"),
    N_("_K")
  };
  static const gchar *cmyk_tips[] =
  {
    N_("Cyan"),
    N_("Magenta"),
    N_("Yellow"),
    N_("Black")
  };

  table = gtk_table_new (4, 4, FALSE);

  gtk_table_set_row_spacings (GTK_TABLE (table), 1);
  gtk_table_set_col_spacings (GTK_TABLE (table), 2);
  gtk_table_set_col_spacing (GTK_TABLE (table), 0, 0);
  gtk_box_pack_start (GTK_BOX (module), table, TRUE, FALSE, 0);

  for (i = 0; i < 4; i++)
    {
      GtkObject *adj;

      adj = gimp_scale_entry_new (GTK_TABLE (table), 1, i,
				  gettext (cmyk_labels[i]),
				  80, -1,
				  0.0,
				  0.0, 100.0,
				  1.0, 10.0,
				  0,
				  TRUE, 0.0, 0.0,
				  gettext (cmyk_tips[i]),
				  NULL);

      g_signal_connect (adj, "value_changed",
			G_CALLBACK (colorsel_cmyk_adj_update),
			module);

      module->adj[i] = GTK_ADJUSTMENT (adj);
    }

  gtk_widget_show (table);
}

static void
colorsel_cmyk_set_color (GimpColorSelector *selector,
			 const GimpRGB     *rgb,
			 const GimpHSV     *hsv)
{
  ColorselCmyk *module;

  module = COLORSEL_CMYK (selector);

  gimp_rgb_to_cmyk (rgb, &module->cmyk);

  gtk_adjustment_set_value (module->adj[0], module->cmyk.c * 100.0);
  gtk_adjustment_set_value (module->adj[1], module->cmyk.m * 100.0);
  gtk_adjustment_set_value (module->adj[2], module->cmyk.y * 100.0);
  gtk_adjustment_set_value (module->adj[3], module->cmyk.k * 100.0);
}

static void
colorsel_cmyk_adj_update (GtkAdjustment *adj,
			  ColorselCmyk  *module)
{
  GimpColorSelector *selector;
  gint               i;

  for (i = 0; i < 4; i++)
    if (module->adj[i] == adj)
      break;

  switch (i)
    {
    case 0:
      module->cmyk.c = adj->value / 100.0;
      break;
    case 1:
      module->cmyk.m = adj->value / 100.0;
      break;
    case 2:
      module->cmyk.y = adj->value / 100.0;
      break;
    case 3:
      module->cmyk.k = adj->value / 100.0;
      break;
    default:
      return;
    }

  selector = GIMP_COLOR_SELECTOR (module);

  gimp_cmyk_to_rgb (&module->cmyk, &selector->rgb);
  gimp_rgb_to_hsv (&selector->rgb, &selector->hsv);

  gimp_color_selector_color_changed (selector);
}