Example #1
0
GtkWidget *
gimp_prop_widget_new_from_pspec (GObject               *config,
                                 GParamSpec            *pspec,
                                 GimpContext           *context,
                                 GimpCreatePickerFunc   create_picker_func,
                                 gpointer               picker_creator,
                                 const gchar          **label)
{
  GtkWidget *widget = NULL;

  g_return_val_if_fail (G_IS_OBJECT (config), NULL);
  g_return_val_if_fail (pspec != NULL, NULL);
  g_return_val_if_fail (GIMP_IS_CONTEXT (context), NULL);
  g_return_val_if_fail (label != NULL, NULL);

  *label = NULL;

  if (GEGL_IS_PARAM_SPEC_SEED (pspec))
    {
      GtkAdjustment *adj;
      GtkWidget     *spin;
      GtkWidget     *button;

      widget = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 4);

      spin = gimp_prop_spin_button_new (config, pspec->name,
                                        1.0, 10.0, 0);
      gtk_box_pack_start (GTK_BOX (widget), spin, TRUE, TRUE, 0);
      gtk_widget_show (spin);

      button = gtk_button_new_with_label (_("New Seed"));
      gtk_box_pack_start (GTK_BOX (widget), button, FALSE, FALSE, 0);
      gtk_widget_show (button);

      adj = gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (spin));

      g_signal_connect (button, "clicked",
                        G_CALLBACK (gimp_prop_widget_new_seed_clicked),
                        adj);

      *label = g_param_spec_get_nick (pspec);
    }
  else if (G_IS_PARAM_SPEC_INT (pspec)   ||
           G_IS_PARAM_SPEC_UINT (pspec)  ||
           G_IS_PARAM_SPEC_FLOAT (pspec) ||
           G_IS_PARAM_SPEC_DOUBLE (pspec))
    {
      gdouble lower;
      gdouble upper;
      gdouble step;
      gdouble page;
      gint    digits;

      if (GEGL_IS_PARAM_SPEC_DOUBLE (pspec))
        {
          GeglParamSpecDouble *gspec = GEGL_PARAM_SPEC_DOUBLE (pspec);

          lower  = gspec->ui_minimum;
          upper  = gspec->ui_maximum;
          step   = gspec->ui_step_small;
          page   = gspec->ui_step_big;
          digits = gspec->ui_digits;
        }
      else if (GEGL_IS_PARAM_SPEC_INT (pspec))
        {
          GeglParamSpecInt *gspec = GEGL_PARAM_SPEC_INT (pspec);

          lower  = gspec->ui_minimum;
          upper  = gspec->ui_maximum;
          step   = gspec->ui_step_small;
          page   = gspec->ui_step_big;
          digits = 0;
        }
      else
        {
          gdouble value;

          _gimp_prop_widgets_get_numeric_values (config, pspec,
                                                 &value, &lower, &upper,
                                                 G_STRFUNC);

          if ((upper - lower <= 1.0) &&
              (G_IS_PARAM_SPEC_FLOAT (pspec) ||
               G_IS_PARAM_SPEC_DOUBLE (pspec)))
            {
              step   = 0.01;
              page   = 0.1;
              digits = 4;
            }
          else if ((upper - lower <= 10.0) &&
                   (G_IS_PARAM_SPEC_FLOAT (pspec) ||
                    G_IS_PARAM_SPEC_DOUBLE (pspec)))
            {
              step   = 0.1;
              page   = 1.0;
              digits = 3;
            }
          else
            {
              step   = 1.0;
              page   = 10.0;
              digits = (G_IS_PARAM_SPEC_FLOAT (pspec) ||
                        G_IS_PARAM_SPEC_DOUBLE (pspec)) ? 2 : 0;
            }
        }

      widget = gimp_prop_spin_scale_new (config, pspec->name, NULL,
                                         step, page, digits);

      if (HAS_KEY (pspec, "unit", "degree") &&
          (upper - lower) == 360.0)
        {
          GtkWidget *hbox;
          GtkWidget *dial;

          gtk_spin_button_set_wrap (GTK_SPIN_BUTTON (widget), TRUE);

          hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 4);

          gtk_box_pack_start (GTK_BOX (hbox), widget, TRUE, TRUE, 0);
          gtk_widget_show (widget);

          dial = gimp_prop_angle_dial_new (config, pspec->name);
          gtk_box_pack_start (GTK_BOX (hbox), dial, FALSE, FALSE, 0);
          gtk_widget_show (dial);

          widget = hbox;
        }
      else if (HAS_KEY (pspec, "unit", "kelvin"))
        {
          GtkWidget *hbox;
          GtkWidget *button;

          hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 4);

          gtk_box_pack_start (GTK_BOX (hbox), widget, TRUE, TRUE, 0);
          gtk_widget_show (widget);

          button = gimp_prop_kelvin_presets_new (config, pspec->name);
          gtk_box_pack_start (GTK_BOX (hbox), button, FALSE, FALSE, 0);
          gtk_widget_show (button);

          widget = hbox;
        }
    }
  else if (G_IS_PARAM_SPEC_STRING (pspec))
    {
      static GQuark multiline_quark = 0;

      if (! multiline_quark)
        multiline_quark = g_quark_from_static_string ("multiline");

      if (GIMP_IS_PARAM_SPEC_CONFIG_PATH (pspec))
        {
          widget =
            gimp_prop_file_chooser_button_new (config, pspec->name,
                                               g_param_spec_get_nick (pspec),
                                               GTK_FILE_CHOOSER_ACTION_OPEN);
        }
      else if (g_param_spec_get_qdata (pspec, multiline_quark))
        {
          GtkTextBuffer *buffer;
          GtkWidget     *view;

          buffer = gimp_prop_text_buffer_new (config, pspec->name, -1);
          view = gtk_text_view_new_with_buffer (buffer);
          g_object_unref (buffer);

          widget = gtk_scrolled_window_new (NULL, NULL);
          gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (widget),
                                               GTK_SHADOW_IN);
          gtk_container_add (GTK_CONTAINER (widget), view);
          gtk_widget_show (view);
        }
      else
        {
          widget = gimp_prop_entry_new (config, pspec->name, -1);
        }

      *label = g_param_spec_get_nick (pspec);
    }
  else if (G_IS_PARAM_SPEC_BOOLEAN (pspec))
    {
      widget = gimp_prop_check_button_new (config, pspec->name,
                                           g_param_spec_get_nick (pspec));
    }
  else if (G_IS_PARAM_SPEC_ENUM (pspec))
    {
      widget = gimp_prop_enum_combo_box_new (config, pspec->name, 0, 0);
      gimp_int_combo_box_set_label (GIMP_INT_COMBO_BOX (widget),
                                    g_param_spec_get_nick (pspec));
    }
  else if (GIMP_IS_PARAM_SPEC_RGB (pspec))
    {
      GtkWidget *button;

      widget = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 4);

      button = gimp_prop_color_button_new (config, pspec->name,
                                           g_param_spec_get_nick (pspec),
                                           128, 24,
                                           GIMP_COLOR_AREA_SMALL_CHECKS);
      gimp_color_button_set_update (GIMP_COLOR_BUTTON (button), TRUE);
      gimp_color_panel_set_context (GIMP_COLOR_PANEL (button), context);
      gtk_box_pack_start (GTK_BOX (widget), button, TRUE, TRUE, 0);
      gtk_widget_show (button);

      if (create_picker_func)
        {
          button = create_picker_func (picker_creator,
                                       pspec->name,
                                       GIMP_STOCK_COLOR_PICKER_GRAY,
                                       _("Pick color from the image"));
          gtk_box_pack_start (GTK_BOX (widget), button, FALSE, FALSE, 0);
          gtk_widget_show (button);
        }

      *label = g_param_spec_get_nick (pspec);
    }
  else
    {
      g_warning ("%s: not supported: %s (%s)\n", G_STRFUNC,
                 g_type_name (G_TYPE_FROM_INSTANCE (pspec)), pspec->name);
    }

  return widget;
}
Example #2
0
GtkWidget *
gimp_prop_table_new (GObject              *config,
                     GType                 owner_type,
                     GimpContext          *context,
                     GimpCreatePickerFunc  create_picker_func,
                     gpointer              picker_creator)
{
  GtkWidget     *table;
  GtkSizeGroup  *size_group;
  GParamSpec   **param_specs;
  guint          n_param_specs;
  gint           i;
  gint           row = 0;
  GParamSpec    *last_pspec = NULL;
  GtkAdjustment *last_x_adj = NULL;
  gint           last_x_row = 0;

  g_return_val_if_fail (G_IS_OBJECT (config), NULL);
  g_return_val_if_fail (context == NULL || GIMP_IS_CONTEXT (context), NULL);

  param_specs = g_object_class_list_properties (G_OBJECT_GET_CLASS (config),
                                                &n_param_specs);

  size_group = gtk_size_group_new (GTK_SIZE_GROUP_HORIZONTAL);

  table = gtk_table_new (3, 1, FALSE);
  gtk_table_set_col_spacings (GTK_TABLE (table), 4);
  gtk_table_set_row_spacings (GTK_TABLE (table), 2);

  for (i = 0; i < n_param_specs; i++)
    {
      GParamSpec  *pspec  = param_specs[i];
      GtkWidget   *widget = NULL;
      const gchar *label  = NULL;

      /*  ignore properties of parent classes of owner_type  */
      if (! g_type_is_a (pspec->owner_type, owner_type))
        continue;

      if (G_IS_PARAM_SPEC_STRING (pspec))
        {
          static GQuark multiline_quark = 0;

          if (! multiline_quark)
            multiline_quark = g_quark_from_static_string ("multiline");

          if (GIMP_IS_PARAM_SPEC_CONFIG_PATH (pspec))
            {
              widget = gimp_prop_file_chooser_button_new (config,
                                                          pspec->name,
                                                          g_param_spec_get_nick (pspec),
                                                          GTK_FILE_CHOOSER_ACTION_OPEN);
            }
          else if (g_param_spec_get_qdata (pspec, multiline_quark))
            {
              GtkTextBuffer *buffer;
              GtkWidget     *view;

              buffer = gimp_prop_text_buffer_new (config, pspec->name, -1);
              view = gtk_text_view_new_with_buffer (buffer);

              widget = gtk_scrolled_window_new (NULL, NULL);
              gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (widget),
                                                   GTK_SHADOW_IN);
              gtk_container_add (GTK_CONTAINER (widget), view);
              gtk_widget_show (view);
            }
          else
            {
              widget = gimp_prop_entry_new (config, pspec->name, -1);
            }

          label  = g_param_spec_get_nick (pspec);
        }
      else if (G_IS_PARAM_SPEC_BOOLEAN (pspec))
        {
          widget = gimp_prop_check_button_new (config, pspec->name,
                                               g_param_spec_get_nick (pspec));
        }
      else if (G_IS_PARAM_SPEC_ENUM (pspec))
        {
          widget = gimp_prop_enum_combo_box_new (config, pspec->name, 0, 0);
          gimp_int_combo_box_set_label (GIMP_INT_COMBO_BOX (widget),
                                        g_param_spec_get_nick (pspec));
        }
      else if (GEGL_IS_PARAM_SPEC_SEED (pspec))
        {
          GtkAdjustment *adj;
          GtkWidget     *scale;
          GtkWidget     *button;

          widget = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 4);

          scale = gimp_prop_spin_scale_new (config, pspec->name,
                                            g_param_spec_get_nick (pspec),
                                            1.0, 10.0, 0);
          gtk_box_pack_start (GTK_BOX (widget), scale, TRUE, TRUE, 0);
          gtk_widget_show (scale);

          button = gtk_button_new_with_label (_("New Seed"));
          gtk_box_pack_start (GTK_BOX (widget), button, FALSE, FALSE, 0);
          gtk_widget_show (button);

          adj = gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (scale));

          g_signal_connect (button, "clicked",
                            G_CALLBACK (gimp_prop_table_new_seed_clicked),
                            adj);
        }
      else if (G_IS_PARAM_SPEC_INT (pspec)   ||
               G_IS_PARAM_SPEC_UINT (pspec)  ||
               G_IS_PARAM_SPEC_FLOAT (pspec) ||
               G_IS_PARAM_SPEC_DOUBLE (pspec))
        {
          GtkAdjustment *adj;
          gdouble        value;
          gdouble        lower;
          gdouble        upper;
          gdouble        step   = 1.0;
          gdouble        page   = 10.0;
          gint           digits = (G_IS_PARAM_SPEC_FLOAT (pspec) ||
                                   G_IS_PARAM_SPEC_DOUBLE (pspec)) ? 2 : 0;

          if (GEGL_IS_PARAM_SPEC_DOUBLE (pspec))
            {
              GeglParamSpecDouble *gspec = GEGL_PARAM_SPEC_DOUBLE (pspec);

              lower = gspec->ui_minimum;
              upper = gspec->ui_maximum;
            }
          else if (GEGL_IS_PARAM_SPEC_INT (pspec))
            {
              GeglParamSpecInt *gspec = GEGL_PARAM_SPEC_INT (pspec);

              lower = gspec->ui_minimum;
              upper = gspec->ui_maximum;
            }
          else
            {
              _gimp_prop_widgets_get_numeric_values (config, pspec,
                                                     &value, &lower, &upper,
                                                     G_STRFUNC);
            }

          if ((upper - lower < 10.0) &&
              (G_IS_PARAM_SPEC_FLOAT (pspec) ||
               G_IS_PARAM_SPEC_DOUBLE (pspec)))
            {
              step   = 0.1;
              page   = 1.0;
              digits = 3;
            }

          widget = gimp_prop_spin_scale_new (config, pspec->name,
                                             g_param_spec_get_nick (pspec),
                                             step, page, digits);

          adj = gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (widget));

          if (g_str_has_suffix (pspec->name, "x") ||
              g_str_has_suffix (pspec->name, "width"))
            {
              last_pspec = pspec;
              last_x_adj = adj;
              last_x_row = row;
            }
          else if ((g_str_has_suffix (pspec->name, "y") ||
                    g_str_has_suffix (pspec->name, "height")) &&
                   last_pspec != NULL &&
                   last_x_adj != NULL &&
                   last_x_row == row - 1)
            {
              GtkWidget *chain = gimp_chain_button_new (GIMP_CHAIN_RIGHT);

              gtk_table_attach (GTK_TABLE (table), chain,
                                3, 4, last_x_row, row + 1,
                                GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL,
                                0, 0);
              gtk_widget_show (chain);

              if (gtk_adjustment_get_value (last_x_adj) ==
                  gtk_adjustment_get_value (adj))
                {
                  GBinding *binding;

                  gimp_chain_button_set_active (GIMP_CHAIN_BUTTON (chain), TRUE);

                  binding = g_object_bind_property (last_x_adj, "value",
                                                    adj,        "value",
                                                    G_BINDING_BIDIRECTIONAL);

                  g_object_set_data (G_OBJECT (chain), "binding", binding);
                }

              g_signal_connect (chain, "toggled",
                                G_CALLBACK (gimp_prop_table_chain_toggled),
                                last_x_adj);

              g_object_set_data (G_OBJECT (last_x_adj), "y-adjustment", adj);

              if (create_picker_func)
                {
                  GtkWidget *button;
                  gchar     *pspec_name;

                  pspec_name = g_strconcat (last_pspec->name, ":",
                                            pspec->name, NULL);

                  button = create_picker_func (picker_creator,
                                               pspec_name,
                                               GIMP_STOCK_CURSOR,
                                               _("Pick coordinates from the image"));
                  gtk_table_attach (GTK_TABLE (table), button,
                                    4, 5, last_x_row, row + 1,
                                    GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL,
                                    0, 0);
                  gtk_widget_show (button);

                  g_object_weak_ref (G_OBJECT (button),
                                     (GWeakNotify) g_free, pspec_name);
                }
            }
        }
      else if (GIMP_IS_PARAM_SPEC_RGB (pspec))
        {
          GtkWidget *button;

          widget = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 4);

          button = gimp_prop_color_button_new (config, pspec->name,
                                               g_param_spec_get_nick (pspec),
                                               128, 24,
                                               GIMP_COLOR_AREA_SMALL_CHECKS);
          gimp_color_button_set_update (GIMP_COLOR_BUTTON (button), TRUE);
          gimp_color_panel_set_context (GIMP_COLOR_PANEL (button), context);
          gtk_box_pack_start (GTK_BOX (widget), button, TRUE, TRUE, 0);
          gtk_widget_show (button);

          if (create_picker_func)
            {
              button = create_picker_func (picker_creator,
                                           pspec->name,
                                           GIMP_STOCK_COLOR_PICKER_GRAY,
                                           _("Pick color from the image"));
              gtk_box_pack_start (GTK_BOX (widget), button, FALSE, FALSE, 0);
              gtk_widget_show (button);
            }

          label = g_param_spec_get_nick (pspec);
        }
      else
        {
          g_warning ("%s: not supported: %s (%s)\n", G_STRFUNC,
                     g_type_name (G_TYPE_FROM_INSTANCE (pspec)), pspec->name);
        }

      if (widget)
        {
          if (label)
            {
              gimp_table_attach_aligned (GTK_TABLE (table), 0, row,
                                         label, 0.0, 0.5,
                                         widget, 2, FALSE);
            }
          else
            {
              gtk_table_attach_defaults (GTK_TABLE (table), widget,
                                         0, 3, row, row + 1);
              gtk_widget_show (widget);
            }

          row++;
        }
    }

  g_object_unref (size_group);

  g_free (param_specs);

  return table;
}
Example #3
0
GParamSpec *
gimp_param_spec_duplicate (GParamSpec *pspec)
{
  GParamSpec  *copy = NULL;
  GParamFlags  flags;

  g_return_val_if_fail (pspec != NULL, NULL);

  flags = pspec->flags | GIMP_CONFIG_PARAM_SERIALIZE;

  if (G_IS_PARAM_SPEC_STRING (pspec))
    {
      GParamSpecString *spec = G_PARAM_SPEC_STRING (pspec);

      if (GEGL_IS_PARAM_SPEC_FILE_PATH (pspec))
        {
          copy = gimp_param_spec_config_path (pspec->name,
                                              g_param_spec_get_nick (pspec),
                                              g_param_spec_get_blurb (pspec),
                                              GIMP_CONFIG_PATH_FILE,
                                              spec->default_value,
                                              flags);
        }
      else
        {
          static GQuark multiline_quark = 0;

          if (! multiline_quark)
            multiline_quark = g_quark_from_static_string ("multiline");

          copy = g_param_spec_string (pspec->name,
                                      g_param_spec_get_nick (pspec),
                                      g_param_spec_get_blurb (pspec),
                                      spec->default_value,
                                      flags);

          if (GEGL_IS_PARAM_SPEC_MULTILINE (pspec))
            {
              g_param_spec_set_qdata (copy, multiline_quark,
                                      GINT_TO_POINTER (TRUE));
            }
        }
    }
  else if (G_IS_PARAM_SPEC_BOOLEAN (pspec))
    {
      GParamSpecBoolean *spec = G_PARAM_SPEC_BOOLEAN (pspec);

      copy = g_param_spec_boolean (pspec->name,
                                   g_param_spec_get_nick (pspec),
                                   g_param_spec_get_blurb (pspec),
                                   spec->default_value,
                                   flags);
    }
  else if (G_IS_PARAM_SPEC_ENUM (pspec))
    {
      GParamSpecEnum *spec = G_PARAM_SPEC_ENUM (pspec);

      copy = g_param_spec_enum (pspec->name,
                                g_param_spec_get_nick (pspec),
                                g_param_spec_get_blurb (pspec),
                                G_TYPE_FROM_CLASS (spec->enum_class),
                                spec->default_value,
                                flags);
    }
  else if (GEGL_IS_PARAM_SPEC_DOUBLE (pspec))
    {
      GeglParamSpecDouble *gspec = GEGL_PARAM_SPEC_DOUBLE (pspec);
      GParamSpecDouble    *spec = G_PARAM_SPEC_DOUBLE (pspec);

      copy = gegl_param_spec_double (pspec->name,
                                     g_param_spec_get_nick (pspec),
                                     g_param_spec_get_blurb (pspec),
                                     spec->minimum,
                                     spec->maximum,
                                     spec->default_value,
                                     gspec->ui_minimum,
                                     gspec->ui_maximum,
                                     gspec->ui_gamma,
                                     flags);
    }
  else if (G_IS_PARAM_SPEC_DOUBLE (pspec))
    {
      GParamSpecDouble *spec = G_PARAM_SPEC_DOUBLE (pspec);

      copy = g_param_spec_double (pspec->name,
                                  g_param_spec_get_nick (pspec),
                                  g_param_spec_get_blurb (pspec),
                                  spec->minimum,
                                  spec->maximum,
                                  spec->default_value,
                                  flags);
    }
  else if (G_IS_PARAM_SPEC_FLOAT (pspec))
    {
      GParamSpecFloat *spec = G_PARAM_SPEC_FLOAT (pspec);

      copy = g_param_spec_float (pspec->name,
                                 g_param_spec_get_nick (pspec),
                                 g_param_spec_get_blurb (pspec),
                                 spec->minimum,
                                 spec->maximum,
                                 spec->default_value,
                                 flags);
    }
  else if (GEGL_IS_PARAM_SPEC_INT (pspec))
    {
      GeglParamSpecInt *gspec = GEGL_PARAM_SPEC_INT (pspec);
      GParamSpecInt    *spec  = G_PARAM_SPEC_INT (pspec);

      copy = gegl_param_spec_int (pspec->name,
                                  g_param_spec_get_nick (pspec),
                                  g_param_spec_get_blurb (pspec),
                                  spec->minimum,
                                  spec->maximum,
                                  spec->default_value,
                                  gspec->ui_minimum,
                                  gspec->ui_maximum,
                                  gspec->ui_gamma,
                                  flags);
    }
  else if (GEGL_IS_PARAM_SPEC_SEED (pspec))
    {
      copy = gegl_param_spec_seed (pspec->name,
                                   g_param_spec_get_nick (pspec),
                                   g_param_spec_get_blurb (pspec),
                                   pspec->flags |
                                   GIMP_CONFIG_PARAM_SERIALIZE);
    }
  else if (G_IS_PARAM_SPEC_INT (pspec))
    {
      GParamSpecInt *spec = G_PARAM_SPEC_INT (pspec);

      copy = g_param_spec_int (pspec->name,
                               g_param_spec_get_nick (pspec),
                               g_param_spec_get_blurb (pspec),
                               spec->minimum,
                               spec->maximum,
                               spec->default_value,
                               flags);
    }
  else if (G_IS_PARAM_SPEC_UINT (pspec))
    {
      GParamSpecUInt *spec = G_PARAM_SPEC_UINT (pspec);

      copy = g_param_spec_uint (pspec->name,
                                g_param_spec_get_nick (pspec),
                                g_param_spec_get_blurb (pspec),
                                spec->minimum,
                                spec->maximum,
                                spec->default_value,
                                flags);
    }
  else if (GIMP_IS_PARAM_SPEC_RGB (pspec))
    {
      GValue  value = G_VALUE_INIT;
      GimpRGB color;

      g_value_init (&value, GIMP_TYPE_RGB);
      g_param_value_set_default (pspec, &value);
      gimp_value_get_rgb (&value, &color);
      g_value_unset (&value);

      copy = gimp_param_spec_rgb (pspec->name,
                                  g_param_spec_get_nick (pspec),
                                  g_param_spec_get_blurb (pspec),
                                  gimp_param_spec_rgb_has_alpha (pspec),
                                  &color,
                                  flags);
    }
  else if (GEGL_IS_PARAM_SPEC_COLOR (pspec))
    {
      GeglColor *gegl_color;
      GimpRGB    gimp_color;
      gdouble    r = 0.0;
      gdouble    g = 0.0;
      gdouble    b = 0.0;
      gdouble    a = 1.0;
      GValue     value = { 0, };

      g_value_init (&value, GEGL_TYPE_COLOR);
      g_param_value_set_default (pspec, &value);

      gegl_color = g_value_get_object (&value);
      if (gegl_color)
        gegl_color_get_rgba (gegl_color, &r, &g, &b, &a);

      gimp_rgba_set (&gimp_color, r, g, b, a);

      g_value_unset (&value);

      copy = gimp_param_spec_rgb (pspec->name,
                                  g_param_spec_get_nick (pspec),
                                  g_param_spec_get_blurb (pspec),
                                  TRUE,
                                  &gimp_color,
                                  flags);
    }
  else if (G_IS_PARAM_SPEC_OBJECT (pspec) ||
           G_IS_PARAM_SPEC_POINTER (pspec))
    {
      /*  silently ignore object properties  */
    }
  else
    {
      g_warning ("%s: not supported: %s (%s)\n", G_STRFUNC,
                 g_type_name (G_TYPE_FROM_INSTANCE (pspec)), pspec->name);
    }

  if (copy)
    {
      GQuark      quark = g_quark_from_static_string ("gegl-property-keys");
      GHashTable *keys  = g_param_spec_get_qdata (pspec, quark);

      if (keys)
        g_param_spec_set_qdata (copy, quark, g_hash_table_ref (keys));
    }

  return copy;
}