gimp/app/core/gimpsubprogress.c

258 lines
7.7 KiB
C

/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <glib-object.h>
#include "core-types.h"
#include "core/gimpsubprogress.h"
#include "core/gimpprogress.h"
static void gimp_sub_progress_iface_init (GimpProgressInterface *iface);
static void gimp_sub_progress_finalize (GObject *object);
static GimpProgress * gimp_sub_progress_start (GimpProgress *progress,
const gchar *message,
gboolean cancelable);
static void gimp_sub_progress_end (GimpProgress *progress);
static gboolean gimp_sub_progress_is_active (GimpProgress *progress);
static void gimp_sub_progress_set_text (GimpProgress *progress,
const gchar *message);
static void gimp_sub_progress_set_value (GimpProgress *progress,
gdouble percentage);
static gdouble gimp_sub_progress_get_value (GimpProgress *progress);
static void gimp_sub_progress_pulse (GimpProgress *progress);
static guint32 gimp_sub_progress_get_window (GimpProgress *progress);
static gboolean gimp_sub_progress_message (GimpProgress *progress,
Gimp *gimp,
GimpMessageSeverity severity,
const gchar *domain,
const gchar *message);
G_DEFINE_TYPE_WITH_CODE (GimpSubProgress, gimp_sub_progress, G_TYPE_OBJECT,
G_IMPLEMENT_INTERFACE (GIMP_TYPE_PROGRESS,
gimp_sub_progress_iface_init))
#define parent_class gimp_sub_progress_parent_class
static void
gimp_sub_progress_class_init (GimpSubProgressClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->finalize = gimp_sub_progress_finalize;
}
static void
gimp_sub_progress_init (GimpSubProgress *sub)
{
sub->progress = NULL;
sub->start = 0.0;
sub->end = 1.0;
}
static void
gimp_sub_progress_finalize (GObject *object)
{
GimpSubProgress *sub = GIMP_SUB_PROGRESS (object);
if (sub->progress)
{
g_object_unref (sub->progress);
sub->progress = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gimp_sub_progress_iface_init (GimpProgressInterface *iface)
{
iface->start = gimp_sub_progress_start;
iface->end = gimp_sub_progress_end;
iface->is_active = gimp_sub_progress_is_active;
iface->set_text = gimp_sub_progress_set_text;
iface->set_value = gimp_sub_progress_set_value;
iface->get_value = gimp_sub_progress_get_value;
iface->pulse = gimp_sub_progress_pulse;
iface->get_window = gimp_sub_progress_get_window;
iface->message = gimp_sub_progress_message;
}
static GimpProgress *
gimp_sub_progress_start (GimpProgress *progress,
const gchar *message,
gboolean cancelable)
{
/* does nothing */
return NULL;
}
static void
gimp_sub_progress_end (GimpProgress *progress)
{
/* does nothing */
}
static gboolean
gimp_sub_progress_is_active (GimpProgress *progress)
{
GimpSubProgress *sub = GIMP_SUB_PROGRESS (progress);
if (sub->progress)
return gimp_progress_is_active (sub->progress);
return FALSE;
}
static void
gimp_sub_progress_set_text (GimpProgress *progress,
const gchar *message)
{
/* does nothing */
}
static void
gimp_sub_progress_set_value (GimpProgress *progress,
gdouble percentage)
{
GimpSubProgress *sub = GIMP_SUB_PROGRESS (progress);
if (sub->progress)
gimp_progress_set_value (sub->progress,
sub->start + percentage * (sub->end - sub->start));
}
static gdouble
gimp_sub_progress_get_value (GimpProgress *progress)
{
GimpSubProgress *sub = GIMP_SUB_PROGRESS (progress);
if (sub->progress)
return gimp_progress_get_value (sub->progress);
return 0.0;
}
static void
gimp_sub_progress_pulse (GimpProgress *progress)
{
GimpSubProgress *sub = GIMP_SUB_PROGRESS (progress);
if (sub->progress)
gimp_progress_pulse (sub->progress);
}
static guint32
gimp_sub_progress_get_window (GimpProgress *progress)
{
GimpSubProgress *sub = GIMP_SUB_PROGRESS (progress);
if (sub->progress)
return gimp_progress_get_window (sub->progress);
return 0;
}
static gboolean
gimp_sub_progress_message (GimpProgress *progress,
Gimp *gimp,
GimpMessageSeverity severity,
const gchar *domain,
const gchar *message)
{
GimpSubProgress *sub = GIMP_SUB_PROGRESS (progress);
if (sub->progress)
return gimp_progress_message (sub->progress,
gimp, severity, domain, message);
return FALSE;
}
/**
* gimp_sub_progress_new:
* @progress: parent progress or %NULL
*
* GimpSubProgress implements the GimpProgress interface and can be
* used whereever a GimpProgress is needed. It maps progress
* information to a sub-range of its parent @progress. This is useful
* when an action breaks down into multiple sub-actions that itself
* need a #GimpProgress pointer. See gimp_image_scale() for an example.
*
* Return value: a new #GimpProgress object
*/
GimpProgress *
gimp_sub_progress_new (GimpProgress *progress)
{
GimpSubProgress *sub;
g_return_val_if_fail (progress == NULL || GIMP_IS_PROGRESS (progress), NULL);
sub = g_object_new (GIMP_TYPE_SUB_PROGRESS, NULL);
if (progress)
sub->progress = g_object_ref (progress);
return GIMP_PROGRESS (sub);
}
/**
* gimp_sub_progress_set_range:
* @start: start value of range on the parent process
* @end: end value of range on the parent process
*
* Sets a range on the parent progress that this @progress should be
* mapped to.
*/
void
gimp_sub_progress_set_range (GimpSubProgress *progress,
gdouble start,
gdouble end)
{
g_return_if_fail (GIMP_IS_SUB_PROGRESS (progress));
g_return_if_fail (start < end);
progress->start = start;
progress->end = end;
}
/**
* gimp_sub_progress_set_step:
* @index: step index
* @num_steps: number of steps
*
* A more convenient form of gimp_sub_progress_set_range().
*/
void
gimp_sub_progress_set_step (GimpSubProgress *progress,
gint index,
gint num_steps)
{
g_return_if_fail (GIMP_IS_SUB_PROGRESS (progress));
g_return_if_fail (index < num_steps && num_steps > 0);
progress->start = (gdouble) index / num_steps;
progress->end = (gdouble) (index + 1) / num_steps;
}