gimp/app/widgets/gimplayermodebox.c

/* LIBGIMP - The GIMP Library
 * Copyright (C) 1995-1999 Peter Mattis and Spencer Kimball
 *
 * gimplayermodebox.c
 * Copyright (C) 2017  Michael Natterer <mitch@gimp.org>
 *
 * 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 <http://www.gnu.org/licenses/>.
 */

#include "config.h"

#include <gtk/gtk.h>
#include <gegl.h>

#include "libgimpbase/gimpbase.h"
#include "libgimpwidgets/gimpwidgets.h"

#include "widgets-types.h"

#include "core/gimp-layer-modes.h"

#include "gimplayermodebox.h"
#include "gimplayermodecombobox.h"

#include "gimp-intl.h"


/**
 * SECTION: gimplayermodebox
 * @title: GimpLayerModeBox
 * @short_description: A #GtkBox subclass for selecting a layer mode.
 *
 * A #GtkBox subclass for selecting a layer mode
 **/


enum
{
  PROP_0,
  PROP_LAYER_MODE,
  PROP_WITH_BEHIND,
  PROP_WITH_REPLACE
};


struct _GimpLayerModeBoxPrivate
{
  GimpLayerMode      layer_mode;
  gboolean           with_behind;
  gboolean           with_replace;
};


static void   gimp_layer_mode_box_constructed  (GObject      *object);
static void   gimp_layer_mode_box_set_property (GObject      *object,
                                                guint         prop_id,
                                                const GValue *value,
                                                GParamSpec   *pspec);
static void   gimp_layer_mode_box_get_property (GObject      *object,
                                                guint         prop_id,
                                                GValue       *value,
                                                GParamSpec   *pspec);


G_DEFINE_TYPE (GimpLayerModeBox, gimp_layer_mode_box,
               GTK_TYPE_BOX)

#define parent_class gimp_layer_mode_box_parent_class


static void
gimp_layer_mode_box_class_init (GimpLayerModeBoxClass *klass)
{
  GObjectClass *object_class = G_OBJECT_CLASS (klass);

  object_class->constructed  = gimp_layer_mode_box_constructed;
  object_class->set_property = gimp_layer_mode_box_set_property;
  object_class->get_property = gimp_layer_mode_box_get_property;

  g_object_class_install_property (object_class, PROP_LAYER_MODE,
                                   g_param_spec_enum ("layer-mode",
                                                      NULL, NULL,
                                                      GIMP_TYPE_LAYER_MODE,
                                                      GIMP_LAYER_MODE_NORMAL,
                                                      GIMP_PARAM_READWRITE |
                                                      G_PARAM_CONSTRUCT));

  g_object_class_install_property (object_class, PROP_WITH_BEHIND,
                                   g_param_spec_boolean ("with-behind",
                                                         NULL, NULL,
                                                         FALSE,
                                                         GIMP_PARAM_READWRITE |
                                                         G_PARAM_CONSTRUCT_ONLY));

  g_object_class_install_property (object_class, PROP_WITH_REPLACE,
                                   g_param_spec_boolean ("with-replace",
                                                         NULL, NULL,
                                                         FALSE,
                                                         GIMP_PARAM_READWRITE |
                                                         G_PARAM_CONSTRUCT_ONLY));

  g_type_class_add_private (klass, sizeof (GimpLayerModeBoxPrivate));
}

static void
gimp_layer_mode_box_init (GimpLayerModeBox *box)
{
  box->priv = G_TYPE_INSTANCE_GET_PRIVATE (box,
                                           GIMP_TYPE_LAYER_MODE_BOX,
                                           GimpLayerModeBoxPrivate);

  gtk_orientable_set_orientation (GTK_ORIENTABLE (box),
                                  GTK_ORIENTATION_HORIZONTAL);
  gtk_box_set_spacing (GTK_BOX (box), 4);
}

static void
gimp_layer_mode_box_constructed (GObject *object)
{
  GimpLayerModeBox *box = GIMP_LAYER_MODE_BOX (object);
  GtkWidget        *mode_combo;
  GtkWidget        *group_combo;
  GtkCellLayout    *layout;
  GtkCellRenderer  *cell;

  G_OBJECT_CLASS (parent_class)->constructed (object);

  mode_combo = gimp_layer_mode_combo_box_new (box->priv->with_behind,
                                              box->priv->with_replace);
  gimp_int_combo_box_set_label (GIMP_INT_COMBO_BOX (mode_combo),
                                _("Mode"));
  gtk_box_pack_start (GTK_BOX (box), mode_combo, TRUE, TRUE, 0);
  gtk_widget_show (mode_combo);

  g_object_bind_property (object,                "layer-mode",
                          G_OBJECT (mode_combo), "layer-mode",
                          G_BINDING_BIDIRECTIONAL |
                          G_BINDING_SYNC_CREATE);

  group_combo = gimp_prop_enum_combo_box_new (G_OBJECT (mode_combo),
                                              "group", 0, 0);
  gtk_box_pack_start (GTK_BOX (box), group_combo, FALSE, FALSE, 0);
  gtk_widget_show (group_combo);

  layout = GTK_CELL_LAYOUT (gtk_bin_get_child (GTK_BIN (group_combo)));
  gtk_cell_layout_clear (layout);

  cell = gtk_cell_renderer_text_new ();
  g_object_set (cell,
                "width-chars", 1,
                NULL);

  gtk_cell_layout_pack_start (layout, cell, TRUE);
  gtk_cell_layout_set_attributes (layout, cell,
                                  "text", GIMP_INT_STORE_LABEL,
                                  NULL);
}

static void
gimp_layer_mode_box_set_property (GObject      *object,
                                  guint         prop_id,
                                  const GValue *value,
                                  GParamSpec   *pspec)
{
  GimpLayerModeBox *box = GIMP_LAYER_MODE_BOX (object);

  switch (prop_id)
    {
    case PROP_LAYER_MODE:
      gimp_layer_mode_box_set_mode (box, g_value_get_enum (value));
      break;

    case PROP_WITH_BEHIND:
      box->priv->with_behind = g_value_get_boolean (value);
      break;

    case PROP_WITH_REPLACE:
      box->priv->with_replace = g_value_get_boolean (value);
      break;

    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
    }
}

static void
gimp_layer_mode_box_get_property (GObject    *object,
                                  guint       prop_id,
                                  GValue     *value,
                                  GParamSpec *pspec)
{
  GimpLayerModeBox *box = GIMP_LAYER_MODE_BOX (object);

  switch (prop_id)
    {
    case PROP_LAYER_MODE:
      g_value_set_enum (value, box->priv->layer_mode);
      break;

    case PROP_WITH_BEHIND:
      g_value_set_boolean (value, box->priv->with_behind);
      break;

    case PROP_WITH_REPLACE:
      g_value_set_boolean (value, box->priv->with_replace);
      break;

    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
    }
}


/**
 * gimp_layer_mode_box_new:
 * Foo.
 *
 * Return value: a new #GimpLayerModeBox.
 **/
GtkWidget *
gimp_layer_mode_box_new (gboolean with_behind,
                         gboolean with_replace)
{
  return g_object_new (GIMP_TYPE_LAYER_MODE_BOX,
                       "with-behind",  with_behind,
                       "with-replace", with_replace,
                       NULL);
}

void
gimp_layer_mode_box_set_mode (GimpLayerModeBox *box,
                              GimpLayerMode     mode)
{
  g_return_if_fail (GIMP_IS_LAYER_MODE_BOX (box));

  if (mode != box->priv->layer_mode)
    {
      box->priv->layer_mode = mode;

      g_object_notify (G_OBJECT (box), "layer-mode");
    }
}

GimpLayerMode
gimp_layer_mode_box_get_mode (GimpLayerModeBox *box)
{
  g_return_val_if_fail (GIMP_IS_LAYER_MODE_BOX (box),
                        GIMP_LAYER_MODE_NORMAL);

  return box->priv->layer_mode;
}