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-rw-r--r--app/core/gimpsubprogress.c317
1 files changed, 317 insertions, 0 deletions
diff --git a/app/core/gimpsubprogress.c b/app/core/gimpsubprogress.c
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+++ b/app/core/gimpsubprogress.c
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+/* 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 3 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, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <glib-object.h>
+
+#include "core-types.h"
+
+#include "core/gimpsubprogress.h"
+#include "core/gimpprogress.h"
+
+
+enum
+{
+ PROP_0,
+ PROP_PROGRESS
+};
+
+
+static void gimp_sub_progress_iface_init (GimpProgressInterface *iface);
+
+static void gimp_sub_progress_finalize (GObject *object);
+static void gimp_sub_progress_set_property (GObject *object,
+ guint property_id,
+ const GValue *value,
+ GParamSpec *pspec);
+static void gimp_sub_progress_get_property (GObject *object,
+ guint property_id,
+ GValue *value,
+ GParamSpec *pspec);
+
+static GimpProgress * gimp_sub_progress_start (GimpProgress *progress,
+ gboolean cancellable,
+ const gchar *message);
+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_id (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;
+ object_class->set_property = gimp_sub_progress_set_property;
+ object_class->get_property = gimp_sub_progress_get_property;
+
+ g_object_class_install_property (object_class, PROP_PROGRESS,
+ g_param_spec_object ("progress",
+ NULL, NULL,
+ GIMP_TYPE_PROGRESS,
+ G_PARAM_READWRITE |
+ G_PARAM_CONSTRUCT_ONLY));
+}
+
+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);
+
+ g_clear_object (&sub->progress);
+
+ 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_id = gimp_sub_progress_get_window_id;
+ iface->message = gimp_sub_progress_message;
+}
+
+static void
+gimp_sub_progress_set_property (GObject *object,
+ guint property_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ GimpSubProgress *sub = GIMP_SUB_PROGRESS (object);
+
+ switch (property_id)
+ {
+ case PROP_PROGRESS:
+ g_return_if_fail (sub->progress == NULL);
+ sub->progress = g_value_dup_object (value);
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+ break;
+ }
+}
+
+static void
+gimp_sub_progress_get_property (GObject *object,
+ guint property_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ GimpSubProgress *sub = GIMP_SUB_PROGRESS (object);
+
+ switch (property_id)
+ {
+ case PROP_PROGRESS:
+ g_value_set_object (value, sub->progress);
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+ break;
+ }
+}
+
+static GimpProgress *
+gimp_sub_progress_start (GimpProgress *progress,
+ gboolean cancellable,
+ const gchar *message)
+{
+ /* 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_id (GimpProgress *progress)
+{
+ GimpSubProgress *sub = GIMP_SUB_PROGRESS (progress);
+
+ if (sub->progress)
+ return gimp_progress_get_window_id (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 wherever 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,
+ "progress", progress,
+ NULL);
+
+ 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;
+}
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