gimp/libgimpwidgets/gimpcontroller.c

256 lines
7.4 KiB
C

/* LIBGIMP - The GIMP Library
* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
*
* gimpcontroller.c
* Copyright (C) 2004 Michael Natterer <mitch@gimp.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <gtk/gtk.h>
#include "libgimpcolor/gimpcolor.h"
#include "gimpwidgetstypes.h"
#include "gimpcontroller.h"
#include "gimpwidgetsmarshal.h"
enum
{
PROP_0,
PROP_NAME
};
enum
{
EVENT,
LAST_SIGNAL
};
static void gimp_controller_class_init (GimpControllerClass *klass);
static void gimp_controller_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gimp_controller_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static GObjectClass *parent_class = NULL;
static guint controller_signals[LAST_SIGNAL] = { 0 };
GType
gimp_controller_get_type (void)
{
static GType controller_type = 0;
if (! controller_type)
{
static const GTypeInfo controller_info =
{
sizeof (GimpControllerClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gimp_controller_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GimpController),
0, /* n_preallocs */
NULL /* instance_init */
};
controller_type = g_type_register_static (G_TYPE_OBJECT,
"GimpController",
&controller_info, 0);
}
return controller_type;
}
gboolean
gimp_controller_boolean_handled_accumulator (GSignalInvocationHint *ihint,
GValue *return_accu,
const GValue *handler_return,
gpointer dummy)
{
gboolean continue_emission;
gboolean signal_handled;
signal_handled = g_value_get_boolean (handler_return);
g_value_set_boolean (return_accu, signal_handled);
continue_emission = ! signal_handled;
return continue_emission;
}
static void
gimp_controller_class_init (GimpControllerClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
object_class->set_property = gimp_controller_set_property;
object_class->get_property = gimp_controller_get_property;
g_object_class_install_property (object_class, PROP_NAME,
g_param_spec_string ("name", NULL, NULL,
"Unnamed Controller",
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
controller_signals[EVENT] =
g_signal_new ("event",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GimpControllerClass, event),
gimp_controller_boolean_handled_accumulator, NULL,
_gimp_widgets_marshal_BOOLEAN__POINTER,
G_TYPE_BOOLEAN, 1,
G_TYPE_POINTER);
klass->name = "Unnamed";
klass->help_id = NULL;
klass->get_n_events = NULL;
klass->get_event_name = NULL;
klass->event = NULL;
}
static void
gimp_controller_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GimpController *controller = GIMP_CONTROLLER (object);
switch (property_id)
{
case PROP_NAME:
if (controller->name)
g_free (controller->name);
controller->name = g_value_dup_string (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_controller_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GimpController *controller = GIMP_CONTROLLER (object);
switch (property_id)
{
case PROP_NAME:
g_value_set_string (value, controller->name);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
GimpController *
gimp_controller_new (GType controller_type)
{
GimpController *controller;
g_return_val_if_fail (g_type_is_a (controller_type, GIMP_TYPE_CONTROLLER),
NULL);
controller = g_object_new (controller_type, NULL);
return controller;
}
gint
gimp_controller_get_n_events (GimpController *controller)
{
g_return_val_if_fail (GIMP_IS_CONTROLLER (controller), 0);
if (GIMP_CONTROLLER_GET_CLASS (controller)->get_n_events)
return GIMP_CONTROLLER_GET_CLASS (controller)->get_n_events (controller);
return 0;
}
const gchar *
gimp_controller_get_event_name (GimpController *controller,
gint event_id)
{
const gchar *name = NULL;
g_return_val_if_fail (GIMP_IS_CONTROLLER (controller), NULL);
if (GIMP_CONTROLLER_GET_CLASS (controller)->get_event_name)
name = GIMP_CONTROLLER_GET_CLASS (controller)->get_event_name (controller,
event_id);
if (! name)
name = "<invalid event id>";
return name;
}
const gchar *
gimp_controller_get_event_blurb (GimpController *controller,
gint event_id)
{
const gchar *blurb = NULL;
g_return_val_if_fail (GIMP_IS_CONTROLLER (controller), NULL);
if (GIMP_CONTROLLER_GET_CLASS (controller)->get_event_blurb)
blurb = GIMP_CONTROLLER_GET_CLASS (controller)->get_event_blurb (controller,
event_id);
if (! blurb)
blurb = "<invalid event id>";
return blurb;
}
gboolean
gimp_controller_event (GimpController *controller,
const GimpControllerEvent *event)
{
gboolean retval = FALSE;
g_return_val_if_fail (GIMP_IS_CONTROLLER (controller), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
g_signal_emit (controller, controller_signals[EVENT], 0,
event, &retval);
return retval;
}