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-rw-r--r--app/widgets/gimplayermodecombobox.c470
1 files changed, 470 insertions, 0 deletions
diff --git a/app/widgets/gimplayermodecombobox.c b/app/widgets/gimplayermodecombobox.c
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+++ b/app/widgets/gimplayermodecombobox.c
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+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1999 Peter Mattis and Spencer Kimball
+ *
+ * gimplayermodecombobox.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 <https://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 "operations/layer-modes/gimp-layer-modes.h"
+
+#include "gimplayermodecombobox.h"
+
+
+/**
+ * SECTION: gimplayermodecombobox
+ * @title: GimpLayerModeComboBox
+ * @short_description: A #GimpEnumComboBox subclass for selecting a layer mode.
+ *
+ * A #GtkComboBox subclass for selecting a layer mode
+ **/
+
+
+enum
+{
+ PROP_0,
+ PROP_CONTEXT,
+ PROP_LAYER_MODE,
+ PROP_GROUP
+};
+
+
+struct _GimpLayerModeComboBoxPrivate
+{
+ GimpLayerModeContext context;
+ GimpLayerMode layer_mode;
+ GimpLayerModeGroup group;
+};
+
+
+static void gimp_layer_mode_combo_box_constructed (GObject *object);
+static void gimp_layer_mode_combo_box_set_property (GObject *object,
+ guint prop_id,
+ const GValue *value,
+ GParamSpec *pspec);
+static void gimp_layer_mode_combo_box_get_property (GObject *object,
+ guint prop_id,
+ GValue *value,
+ GParamSpec *pspec);
+
+static void gimp_layer_mode_combo_box_changed (GtkComboBox *gtk_combo);
+
+static void gimp_layer_mode_combo_box_update_model (GimpLayerModeComboBox *combo,
+ gboolean change_mode);
+static gboolean gimp_layer_mode_combo_box_separator_func (GtkTreeModel *model,
+ GtkTreeIter *iter,
+ gpointer data);
+
+
+G_DEFINE_TYPE_WITH_PRIVATE (GimpLayerModeComboBox, gimp_layer_mode_combo_box,
+ GIMP_TYPE_ENUM_COMBO_BOX)
+
+#define parent_class gimp_layer_mode_combo_box_parent_class
+
+
+static void
+gimp_layer_mode_combo_box_class_init (GimpLayerModeComboBoxClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+ GtkComboBoxClass *combo_class = GTK_COMBO_BOX_CLASS (klass);
+
+ object_class->constructed = gimp_layer_mode_combo_box_constructed;
+ object_class->set_property = gimp_layer_mode_combo_box_set_property;
+ object_class->get_property = gimp_layer_mode_combo_box_get_property;
+
+ combo_class->changed = gimp_layer_mode_combo_box_changed;
+
+ g_object_class_install_property (object_class, PROP_CONTEXT,
+ g_param_spec_flags ("context",
+ NULL, NULL,
+ GIMP_TYPE_LAYER_MODE_CONTEXT,
+ GIMP_LAYER_MODE_CONTEXT_ALL,
+ GIMP_PARAM_READWRITE |
+ G_PARAM_CONSTRUCT));
+
+ 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_GROUP,
+ g_param_spec_enum ("group",
+ NULL, NULL,
+ GIMP_TYPE_LAYER_MODE_GROUP,
+ GIMP_LAYER_MODE_GROUP_DEFAULT,
+ GIMP_PARAM_READWRITE |
+ G_PARAM_CONSTRUCT));
+}
+
+static void
+gimp_layer_mode_combo_box_init (GimpLayerModeComboBox *combo)
+{
+ combo->priv = gimp_layer_mode_combo_box_get_instance_private (combo);
+
+ gtk_combo_box_set_row_separator_func (GTK_COMBO_BOX (combo),
+ gimp_layer_mode_combo_box_separator_func,
+ GINT_TO_POINTER (GIMP_LAYER_MODE_SEPARATOR),
+ NULL);
+}
+
+static void
+gimp_layer_mode_combo_box_constructed (GObject *object)
+{
+ GimpLayerModeComboBox *combo = GIMP_LAYER_MODE_COMBO_BOX (object);
+
+ G_OBJECT_CLASS (parent_class)->constructed (object);
+
+ gimp_layer_mode_combo_box_update_model (combo, FALSE);
+
+ gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (combo),
+ combo->priv->layer_mode);
+}
+
+static void
+gimp_layer_mode_combo_box_set_property (GObject *object,
+ guint prop_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ GimpLayerModeComboBox *combo = GIMP_LAYER_MODE_COMBO_BOX (object);
+
+ switch (prop_id)
+ {
+ case PROP_CONTEXT:
+ gimp_layer_mode_combo_box_set_context (combo, g_value_get_flags (value));
+ break;
+
+ case PROP_LAYER_MODE:
+ gimp_layer_mode_combo_box_set_mode (combo, g_value_get_enum (value));
+ break;
+
+ case PROP_GROUP:
+ gimp_layer_mode_combo_box_set_group (combo, g_value_get_enum (value));
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gimp_layer_mode_combo_box_get_property (GObject *object,
+ guint prop_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ GimpLayerModeComboBox *combo = GIMP_LAYER_MODE_COMBO_BOX (object);
+
+ switch (prop_id)
+ {
+ case PROP_CONTEXT:
+ g_value_set_flags (value, combo->priv->context);
+ break;
+
+ case PROP_LAYER_MODE:
+ g_value_set_enum (value, combo->priv->layer_mode);
+ break;
+
+ case PROP_GROUP:
+ g_value_set_enum (value, combo->priv->group);
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gimp_layer_mode_combo_box_changed (GtkComboBox *gtk_combo)
+{
+ GimpLayerModeComboBox *combo = GIMP_LAYER_MODE_COMBO_BOX (gtk_combo);
+ GimpLayerMode mode;
+
+ if (gimp_int_combo_box_get_active (GIMP_INT_COMBO_BOX (combo),
+ (gint *) &mode))
+ {
+ combo->priv->layer_mode = mode;
+
+ g_object_notify (G_OBJECT (combo), "layer-mode");
+ }
+}
+
+
+/**
+ * gimp_layer_mode_combo_box_new:
+ * Foo.
+ *
+ * Return value: a new #GimpLayerModeComboBox.
+ **/
+GtkWidget *
+gimp_layer_mode_combo_box_new (GimpLayerModeContext context)
+{
+ return g_object_new (GIMP_TYPE_LAYER_MODE_COMBO_BOX,
+ "context", context,
+ NULL);
+}
+
+void
+gimp_layer_mode_combo_box_set_context (GimpLayerModeComboBox *combo,
+ GimpLayerModeContext context)
+{
+ g_return_if_fail (GIMP_IS_LAYER_MODE_COMBO_BOX (combo));
+
+ if (context != combo->priv->context)
+ {
+ g_object_freeze_notify (G_OBJECT (combo));
+
+ combo->priv->context = context;
+ g_object_notify (G_OBJECT (combo), "context");
+
+ gimp_layer_mode_combo_box_update_model (combo, TRUE);
+
+ g_object_thaw_notify (G_OBJECT (combo));
+ }
+}
+
+GimpLayerModeContext
+gimp_layer_mode_combo_box_get_context (GimpLayerModeComboBox *combo)
+{
+ g_return_val_if_fail (GIMP_IS_LAYER_MODE_COMBO_BOX (combo),
+ GIMP_LAYER_MODE_CONTEXT_ALL);
+
+ return combo->priv->context;
+}
+
+void
+gimp_layer_mode_combo_box_set_mode (GimpLayerModeComboBox *combo,
+ GimpLayerMode mode)
+{
+ g_return_if_fail (GIMP_IS_LAYER_MODE_COMBO_BOX (combo));
+ g_return_if_fail (gimp_layer_mode_get_context (mode) & combo->priv->context);
+
+ if (mode != combo->priv->layer_mode)
+ {
+ GtkTreeModel *model;
+ GtkTreeIter dummy;
+
+ model = gtk_combo_box_get_model (GTK_COMBO_BOX (combo));
+
+ g_object_freeze_notify (G_OBJECT (combo));
+
+ if (! gimp_int_store_lookup_by_value (model, mode, &dummy))
+ {
+ combo->priv->group = gimp_layer_mode_get_group (mode);
+ g_object_notify (G_OBJECT (combo), "group");
+
+ gimp_layer_mode_combo_box_update_model (combo, FALSE);
+ }
+
+ gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (combo), mode);
+
+ g_object_thaw_notify (G_OBJECT (combo));
+ }
+}
+
+GimpLayerMode
+gimp_layer_mode_combo_box_get_mode (GimpLayerModeComboBox *combo)
+{
+ g_return_val_if_fail (GIMP_IS_LAYER_MODE_COMBO_BOX (combo),
+ GIMP_LAYER_MODE_NORMAL);
+
+ return combo->priv->layer_mode;
+}
+
+void
+gimp_layer_mode_combo_box_set_group (GimpLayerModeComboBox *combo,
+ GimpLayerModeGroup group)
+{
+ g_return_if_fail (GIMP_IS_LAYER_MODE_COMBO_BOX (combo));
+
+ if (group != combo->priv->group)
+ {
+ g_object_freeze_notify (G_OBJECT (combo));
+
+ combo->priv->group = group;
+ g_object_notify (G_OBJECT (combo), "group");
+
+ gimp_layer_mode_combo_box_update_model (combo, TRUE);
+
+ g_object_thaw_notify (G_OBJECT (combo));
+ }
+}
+
+GimpLayerModeGroup
+gimp_layer_mode_combo_box_get_group (GimpLayerModeComboBox *combo)
+{
+ g_return_val_if_fail (GIMP_IS_LAYER_MODE_COMBO_BOX (combo),
+ GIMP_LAYER_MODE_GROUP_DEFAULT);
+
+ return combo->priv->group;
+}
+
+
+/* private functions */
+
+static void
+gimp_enum_store_add_value (GtkListStore *store,
+ GEnumValue *value)
+{
+ GtkTreeIter iter = { 0, };
+ const gchar *desc;
+ const gchar *abbrev;
+ gchar *stripped;
+
+ desc = gimp_enum_value_get_desc (GIMP_ENUM_STORE (store)->enum_class, value);
+ abbrev = gimp_enum_value_get_abbrev (GIMP_ENUM_STORE (store)->enum_class, value);
+
+ /* no mnemonics in combo boxes */
+ stripped = gimp_strip_uline (desc);
+
+ gtk_list_store_append (store, &iter);
+ gtk_list_store_set (store, &iter,
+ GIMP_INT_STORE_VALUE, value->value,
+ GIMP_INT_STORE_LABEL, stripped,
+ GIMP_INT_STORE_ABBREV, abbrev,
+ -1);
+
+ g_free (stripped);
+}
+
+static void
+gimp_enum_store_add_separator (GtkListStore *store)
+{
+ GtkTreeIter iter = { 0, };
+
+ gtk_list_store_append (store, &iter);
+ gtk_list_store_set (store, &iter,
+ GIMP_INT_STORE_VALUE, GIMP_LAYER_MODE_SEPARATOR,
+ -1);
+}
+
+static GtkListStore *
+gimp_enum_store_new_from_array (GType enum_type,
+ gint n_values,
+ const gint *values,
+ GimpLayerModeContext context)
+{
+ GtkListStore *store;
+ GEnumValue *value;
+ gboolean first_item = TRUE;
+ gboolean prepend_separator = FALSE;
+ gint i;
+
+ g_return_val_if_fail (G_TYPE_IS_ENUM (enum_type), NULL);
+ g_return_val_if_fail (n_values > 1, NULL);
+ g_return_val_if_fail (values != NULL, NULL);
+
+ store = g_object_new (GIMP_TYPE_ENUM_STORE,
+ "enum-type", enum_type,
+ NULL);
+
+ for (i = 0; i < n_values; i++)
+ {
+ if (values[i] != GIMP_LAYER_MODE_SEPARATOR)
+ {
+ if (gimp_layer_mode_get_context (values[i]) & context)
+ {
+ value = g_enum_get_value (GIMP_ENUM_STORE (store)->enum_class,
+ values[i]);
+
+ if (value)
+ {
+ if (prepend_separator)
+ {
+ gimp_enum_store_add_separator (store);
+
+ prepend_separator = FALSE;
+ }
+
+ gimp_enum_store_add_value (store, value);
+
+ first_item = FALSE;
+ }
+ }
+ }
+ else
+ {
+ if (! first_item)
+ prepend_separator = TRUE;
+ }
+ }
+
+ return store;
+}
+
+static void
+gimp_layer_mode_combo_box_update_model (GimpLayerModeComboBox *combo,
+ gboolean change_mode)
+{
+ GtkListStore *store;
+ const GimpLayerMode *modes;
+ gint n_modes;
+
+ modes = gimp_layer_mode_get_group_array (combo->priv->group, &n_modes);
+ store = gimp_enum_store_new_from_array (GIMP_TYPE_LAYER_MODE,
+ n_modes, (gint *) modes,
+ combo->priv->context);
+
+ gtk_combo_box_set_model (GTK_COMBO_BOX (combo), GTK_TREE_MODEL (store));
+ g_object_unref (store);
+
+ if (change_mode)
+ {
+ GimpLayerMode new_mode;
+
+ if (gimp_layer_mode_get_for_group (combo->priv->layer_mode,
+ combo->priv->group,
+ &new_mode) &&
+ (gimp_layer_mode_get_context (new_mode) & combo->priv->context))
+ {
+ gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (combo), new_mode);
+ }
+ else
+ {
+ GtkTreeIter iter;
+
+ /* switch to the first mode, which will be one of the "normal" */
+ gtk_tree_model_get_iter_first (GTK_TREE_MODEL (store), &iter);
+ gtk_combo_box_set_active_iter (GTK_COMBO_BOX (combo), &iter);
+ }
+ }
+}
+
+static gboolean
+gimp_layer_mode_combo_box_separator_func (GtkTreeModel *model,
+ GtkTreeIter *iter,
+ gpointer data)
+{
+ gint value;
+
+ gtk_tree_model_get (model, iter, GIMP_INT_STORE_VALUE, &value, -1);
+
+ return value == GPOINTER_TO_INT (data);
+}