mirror of https://github.com/GNOME/gimp.git
290 lines
7.3 KiB
C
290 lines
7.3 KiB
C
/* The GIMP -- an image manipulation program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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* Copyright (C) 1998 Andy Thomas.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURIGHTE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#include <string.h>
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#include <gtk/gtk.h>
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#include "libgimpwidgets/gimpwidgets.h"
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#include "gui-types.h"
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#include "core/gimp.h"
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#include "core/gimpcontainer.h"
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#include "core/gimpcontext.h"
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#include "core/gimpdatafactory.h"
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#include "core/gimpgradient.h"
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#include "pdb/procedural_db.h"
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#include "widgets/gimpdatafactoryview.h"
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#include "dialogs-constructors.h"
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#include "gradient-select.h"
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#include "menus.h"
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#include "gimp-intl.h"
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/* local function prototypes */
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static void gradient_select_change_callbacks (GradientSelect *gsp,
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gboolean closing);
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static void gradient_select_gradient_changed (GimpContext *context,
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GimpGradient *gradient,
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GradientSelect *gsp);
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static void gradient_select_close_callback (GtkWidget *widget,
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GradientSelect *gsp);
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/* list of active dialogs */
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static GSList *gradient_active_dialogs = NULL;
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/* public functions */
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GradientSelect *
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gradient_select_new (Gimp *gimp,
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const gchar *title,
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const gchar *initial_gradient,
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const gchar *callback_name,
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gint sample_size)
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{
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GradientSelect *gsp;
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GimpGradient *active = NULL;
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g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL);
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g_return_val_if_fail (title != NULL, NULL);
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if (gimp->no_data)
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{
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static gboolean first_call = TRUE;
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if (first_call)
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gimp_data_factory_data_init (gimp->gradient_factory, FALSE);
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first_call = FALSE;
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}
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if (initial_gradient && strlen (initial_gradient))
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{
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active = (GimpGradient *)
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gimp_container_get_child_by_name (gimp->gradient_factory->container,
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initial_gradient);
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}
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if (! active)
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active = gimp_context_get_gradient (gimp_get_current_context (gimp));
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if (! active)
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return NULL;
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gsp = g_new0 (GradientSelect, 1);
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/* Add to active gradient dialogs list */
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gradient_active_dialogs = g_slist_append (gradient_active_dialogs, gsp);
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gsp->context = gimp_context_new (gimp, title, NULL);
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gsp->callback_name = g_strdup (callback_name);
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gsp->sample_size = sample_size;
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gimp_context_set_gradient (gsp->context, active);
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g_signal_connect (gsp->context, "gradient_changed",
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G_CALLBACK (gradient_select_gradient_changed),
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gsp);
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/* the shell */
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gsp->shell = gimp_dialog_new (title, "gradient_selection",
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gimp_standard_help_func,
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"dialogs/gradient_selection.html",
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GTK_WIN_POS_MOUSE,
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FALSE, TRUE, FALSE,
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GTK_STOCK_CLOSE, gradient_select_close_callback,
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gsp, NULL, NULL, TRUE, TRUE,
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NULL);
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/* the gradient list */
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gsp->view = gimp_data_factory_view_new (GIMP_VIEW_TYPE_LIST,
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gimp->gradient_factory,
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dialogs_edit_gradient_func,
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gsp->context,
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GIMP_PREVIEW_SIZE_EXTRA_SMALL,
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6, 6,
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global_menu_factory, "<Gradients>");
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gtk_container_set_border_width (GTK_CONTAINER (gsp->view), 4);
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gtk_container_add (GTK_CONTAINER (GTK_DIALOG (gsp->shell)->vbox), gsp->view);
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gtk_widget_show (gsp->view);
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gtk_widget_show (gsp->shell);
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return gsp;
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}
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void
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gradient_select_free (GradientSelect *gsp)
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{
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g_return_if_fail (gsp != NULL);
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gtk_widget_destroy (gsp->shell);
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/* remove from active list */
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gradient_active_dialogs = g_slist_remove (gradient_active_dialogs, gsp);
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if (gsp->callback_name)
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g_free (gsp->callback_name);
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if (gsp->context)
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g_object_unref (gsp->context);
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g_free (gsp);
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}
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GradientSelect *
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gradient_select_get_by_callback (const gchar *callback_name)
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{
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GSList *list;
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GradientSelect *gsp;
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for (list = gradient_active_dialogs; list; list = g_slist_next (list))
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{
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gsp = (GradientSelect *) list->data;
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if (gsp->callback_name && ! strcmp (callback_name, gsp->callback_name))
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return gsp;
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}
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return NULL;
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}
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void
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gradient_select_dialogs_check (void)
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{
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GradientSelect *gsp;
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GSList *list;
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list = gradient_active_dialogs;
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while (list)
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{
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gsp = (GradientSelect *) list->data;
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list = g_slist_next (list);
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if (gsp->callback_name)
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{
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if (! procedural_db_lookup (gsp->context->gimp, gsp->callback_name))
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gradient_select_close_callback (NULL, gsp);
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}
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}
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}
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/* private functions */
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static void
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gradient_select_change_callbacks (GradientSelect *gsp,
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gboolean closing)
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{
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ProcRecord *proc = NULL;
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GimpGradient *gradient;
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static gboolean busy = FALSE;
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if (! (gsp && gsp->callback_name) || busy)
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return;
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busy = TRUE;
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gradient = gimp_context_get_gradient (gsp->context);
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/* If its still registered run it */
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proc = procedural_db_lookup (gsp->context->gimp, gsp->callback_name);
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if (proc && gradient)
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{
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Argument *return_vals;
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gint nreturn_vals;
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gdouble *values, *pv;
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double pos, delta;
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GimpRGB color;
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gint i;
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i = gsp->sample_size;
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pos = 0.0;
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delta = 1.0 / (i - 1);
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values = g_new (gdouble, 4 * i);
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pv = values;
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while (i--)
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{
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gimp_gradient_get_color_at (gradient, pos, &color);
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*pv++ = color.r;
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*pv++ = color.g;
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*pv++ = color.b;
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*pv++ = color.a;
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pos += delta;
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}
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return_vals =
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procedural_db_run_proc (gsp->context->gimp,
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gsp->callback_name,
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&nreturn_vals,
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GIMP_PDB_STRING, GIMP_OBJECT (gradient)->name,
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GIMP_PDB_INT32, gsp->sample_size * 4,
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GIMP_PDB_FLOATARRAY, values,
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GIMP_PDB_INT32, (gint) closing,
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GIMP_PDB_END);
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if (!return_vals || return_vals[0].value.pdb_int != GIMP_PDB_SUCCESS)
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g_message (_("Unable to run gradient callback.\n"
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"The corresponding plug-in may have crashed."));
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if (return_vals)
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procedural_db_destroy_args (return_vals, nreturn_vals);
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}
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busy = FALSE;
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}
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static void
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gradient_select_gradient_changed (GimpContext *context,
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GimpGradient *gradient,
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GradientSelect *gsp)
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{
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if (gradient)
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gradient_select_change_callbacks (gsp, FALSE);
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}
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static void
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gradient_select_close_callback (GtkWidget *widget,
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GradientSelect *gsp)
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{
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gradient_select_change_callbacks (gsp, TRUE);
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gradient_select_free (gsp);
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}
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