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gimp/app/gui/gradient-select.c

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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
* Copyright (C) 1998 Andy Thomas.
*
* 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 PURIGHTE. 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <string.h>
#include <gtk/gtk.h>
#include "libgimpwidgets/gimpwidgets.h"
#include "gui-types.h"
#include "core/gimp.h"
#include "core/gimpcontainer.h"
#include "core/gimpcontext.h"
#include "core/gimpdatafactory.h"
#include "core/gimpgradient.h"
#include "pdb/procedural_db.h"
#include "widgets/gimpdatafactoryview.h"
#include "dialogs-constructors.h"
#include "gradient-select.h"
#include "libgimp/gimpintl.h"
static void gradient_select_change_callbacks (GradientSelect *gsp,
gboolean closing);
static void gradient_select_gradient_changed (GimpContext *context,
GimpGradient *gradient,
GradientSelect *gsp);
static void gradient_select_close_callback (GtkWidget *widget,
gpointer data);
/* list of active dialogs */
static GSList *gradient_active_dialogs = NULL;
/* the main gradient selection dialog */
static GradientSelect *gradient_select_dialog = NULL;
/* public functions */
GtkWidget *
gradient_dialog_create (Gimp *gimp)
{
g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL);
if (! gradient_select_dialog)
{
gradient_select_dialog = gradient_select_new (gimp, NULL, NULL, NULL, 0);
}
return gradient_select_dialog->shell;
}
void
gradient_dialog_free (void)
{
if (gradient_select_dialog)
{
gradient_select_free (gradient_select_dialog);
gradient_select_dialog = NULL;
}
}
/* If title == NULL then it is the main gradient select dialog */
GradientSelect *
gradient_select_new (Gimp *gimp,
const gchar *title,
const gchar *initial_gradient,
const gchar *callback_name,
gint sample_size)
{
GradientSelect *gsp;
GtkWidget *vbox;
GimpGradient *active = NULL;
static gboolean first_call = TRUE;
g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL);
gsp = g_new0 (GradientSelect, 1);
gsp->callback_name = g_strdup (callback_name);
gsp->sample_size = sample_size;
/* The shell */
gsp->shell = gimp_dialog_new (title ? title : _("Gradient Selection"),
"gradient_selection",
gimp_standard_help_func,
"dialogs/gradient_selection.html",
title ? GTK_WIN_POS_MOUSE : GTK_WIN_POS_NONE,
FALSE, TRUE, FALSE,
"_delete_event_", gradient_select_close_callback,
gsp, NULL, NULL, FALSE, TRUE,
NULL);
gtk_dialog_set_has_separator (GTK_DIALOG (gsp->shell), FALSE);
gtk_widget_hide (GTK_DIALOG (gsp->shell)->action_area);
if (title)
{
gsp->context = gimp_context_new (gimp, title, NULL);
}
else
{
gsp->context = gimp_get_user_context (gimp);
}
if (gimp->no_data && first_call)
gimp_data_factory_data_init (gsp->context->gimp->gradient_factory, FALSE);
first_call = FALSE;
if (title && initial_gradient && strlen (initial_gradient))
{
active = (GimpGradient *)
gimp_container_get_child_by_name (gsp->context->gimp->gradient_factory->container,
initial_gradient);
}
else
{
active = gimp_context_get_gradient (gimp_get_user_context (gimp));
}
if (!active)
active = gimp_context_get_gradient (gimp_get_standard_context (gimp));
if (title)
gimp_context_set_gradient (gsp->context, active);
vbox = gtk_vbox_new (FALSE, 0);
gtk_container_set_border_width (GTK_CONTAINER (vbox), 2);
gtk_container_add (GTK_CONTAINER (GTK_DIALOG (gsp->shell)->vbox), vbox);
/* The Gradient List */
gsp->view = gimp_data_factory_view_new (GIMP_VIEW_TYPE_LIST,
gsp->context->gimp->gradient_factory,
dialogs_edit_gradient_func,
gsp->context,
16,
10, 10,
NULL);
gtk_box_pack_start (GTK_BOX (vbox), gsp->view, TRUE, TRUE, 0);
gtk_widget_show (gsp->view);
gtk_widget_show (vbox);
gtk_widget_show (gsp->shell);
g_signal_connect (G_OBJECT (gsp->context), "gradient_changed",
G_CALLBACK (gradient_select_gradient_changed),
(gpointer) gsp);
/* Add to active gradient dialogs list */
gradient_active_dialogs = g_slist_append (gradient_active_dialogs, gsp);
return gsp;
}
void
gradient_select_free (GradientSelect *gsp)
{
g_return_if_fail (gsp != NULL);
gtk_widget_destroy (gsp->shell);
/* remove from active list */
gradient_active_dialogs = g_slist_remove (gradient_active_dialogs, gsp);
g_signal_handlers_disconnect_by_func (G_OBJECT (gsp->context),
gradient_select_gradient_changed,
gsp);
if (gsp->callback_name)
{
g_free (gsp->callback_name);
g_object_unref (G_OBJECT (gsp->context));
}
g_free (gsp);
}
static void
gradient_select_change_callbacks (GradientSelect *gsp,
gboolean closing)
{
gchar *name;
ProcRecord *prec = NULL;
GimpGradient *gradient;
gint nreturn_vals;
static gboolean busy = FALSE;
/* Any procs registered to callback? */
Argument *return_vals;
if (!gsp || !gsp->callback_name || busy != 0)
return;
busy = TRUE;
name = gsp->callback_name;
gradient = gimp_context_get_gradient (gsp->context);
/* If its still registered run it */
prec = procedural_db_lookup (gsp->context->gimp, name);
if (prec && gradient)
{
gdouble *values, *pv;
double pos, delta;
GimpRGB color;
gint i;
i = gsp->sample_size;
pos = 0.0;
delta = 1.0 / (i - 1);
values = g_new (gdouble, 4 * i);
pv = values;
while (i--)
{
gimp_gradient_get_color_at (gradient, pos, &color);
*pv++ = color.r;
*pv++ = color.g;
*pv++ = color.b;
*pv++ = color.a;
pos += delta;
}
return_vals =
procedural_db_run_proc (gsp->context->gimp,
name,
&nreturn_vals,
GIMP_PDB_STRING, GIMP_OBJECT (gradient)->name,
GIMP_PDB_INT32, gsp->sample_size * 4,
GIMP_PDB_FLOATARRAY, values,
GIMP_PDB_INT32, (gint) closing,
GIMP_PDB_END);
if (!return_vals || return_vals[0].value.pdb_int != GIMP_PDB_SUCCESS)
g_message (_("Failed to run gradient callback function.\n"
"The corresponding plug-in may have crashed."));
else
procedural_db_destroy_args (return_vals, nreturn_vals);
}
busy = FALSE;
}
GradientSelect *
gradient_select_get_by_callback (const gchar *callback_name)
{
GSList *list;
GradientSelect *gsp;
for (list = gradient_active_dialogs; list; list = g_slist_next (list))
{
gsp = (GradientSelect *) list->data;
if (gsp->callback_name && ! strcmp (callback_name, gsp->callback_name))
return gsp;
}
return NULL;
}
/* Close active dialogs that no longer have PDB registered for them */
void
gradient_select_dialogs_check (void)
{
GradientSelect *gsp;
GSList *list;
gchar *name;
ProcRecord *prec = NULL;
list = gradient_active_dialogs;
while (list)
{
gsp = (GradientSelect *) list->data;
list = g_slist_next (list);
name = gsp->callback_name;
if (name)
{
prec = procedural_db_lookup (gsp->context->gimp, name);
if (!prec)
{
/* Can alter gradient_active_dialogs list */
gradient_select_close_callback (NULL, gsp);
}
}
}
}
static void
gradient_select_gradient_changed (GimpContext *context,
GimpGradient *gradient,
GradientSelect *gsp)
{
if (gradient)
{
if (gsp->callback_name)
gradient_select_change_callbacks (gsp, FALSE);
}
}
static void
gradient_select_close_callback (GtkWidget *widget,
gpointer data)
{
GradientSelect *gsp;
gsp = (GradientSelect *) data;
if (GTK_WIDGET_VISIBLE (gsp->shell))
gtk_widget_hide (gsp->shell);
/* Free memory if poping down dialog which is not the main one */
if (gsp != gradient_select_dialog)
{
gradient_select_change_callbacks (gsp, TRUE);
gradient_select_free (gsp);
}
}
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