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-rw-r--r--libgimpwidgets/gimpstringcombobox.c363
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+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
+ *
+ * gimpstringcombobox.c
+ * Copyright (C) 2007 Sven Neumann <sven@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 3 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, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <string.h>
+
+#include <gtk/gtk.h>
+
+#include "gimpwidgetstypes.h"
+
+#include "gimpstringcombobox.h"
+
+
+/**
+ * SECTION: gimpstringcombobox
+ * @title: GimpStringComboBox
+ * @short_description: A #GtkComboBox subclass to select strings.
+ *
+ * A #GtkComboBox subclass to select strings.
+ **/
+
+
+enum
+{
+ PROP_0,
+ PROP_ID_COLUMN,
+ PROP_LABEL_COLUMN,
+ PROP_ELLIPSIZE
+};
+
+
+typedef struct
+{
+ gint id_column;
+ gint label_column;
+ GtkCellRenderer *text_renderer;
+} GimpStringComboBoxPrivate;
+
+#define GIMP_STRING_COMBO_BOX_GET_PRIVATE(obj) \
+ ((GimpStringComboBoxPrivate *) ((GimpStringComboBox *) (obj))->priv)
+
+
+static void gimp_string_combo_box_constructed (GObject *object);
+static void gimp_string_combo_box_set_property (GObject *object,
+ guint property_id,
+ const GValue *value,
+ GParamSpec *pspec);
+static void gimp_string_combo_box_get_property (GObject *object,
+ guint property_id,
+ GValue *value,
+ GParamSpec *pspec);
+
+
+G_DEFINE_TYPE_WITH_PRIVATE (GimpStringComboBox, gimp_string_combo_box,
+ GTK_TYPE_COMBO_BOX)
+
+#define parent_class gimp_string_combo_box_parent_class
+
+
+static void
+gimp_string_combo_box_class_init (GimpStringComboBoxClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+ object_class->constructed = gimp_string_combo_box_constructed;
+ object_class->set_property = gimp_string_combo_box_set_property;
+ object_class->get_property = gimp_string_combo_box_get_property;
+
+ /**
+ * GimpStringComboBox:id-column:
+ *
+ * The column in the associated GtkTreeModel that holds unique
+ * string IDs.
+ *
+ * Since: 2.4
+ */
+ g_object_class_install_property (object_class,
+ PROP_ID_COLUMN,
+ g_param_spec_int ("id-column",
+ "ID Column",
+ "The model column that holds the ID",
+ 0, G_MAXINT,
+ 0,
+ GIMP_PARAM_READWRITE |
+ G_PARAM_CONSTRUCT_ONLY));
+ /**
+ * GimpStringComboBox:id-column:
+ *
+ * The column in the associated GtkTreeModel that holds strings to
+ * be used as labels in the combo-box.
+ *
+ * Since: 2.4
+ */
+ g_object_class_install_property (object_class,
+ PROP_LABEL_COLUMN,
+ g_param_spec_int ("label-column",
+ "Label Column",
+ "The model column that holds the label",
+ 0, G_MAXINT,
+ 0,
+ GIMP_PARAM_READWRITE |
+ G_PARAM_CONSTRUCT_ONLY));
+
+ /**
+ * GimpStringComboBox:ellipsize:
+ *
+ * Specifies the preferred place to ellipsize text in the combo-box,
+ * if the cell renderer does not have enough room to display the
+ * entire string.
+ *
+ * Since: 2.4
+ */
+ g_object_class_install_property (object_class,
+ PROP_ELLIPSIZE,
+ g_param_spec_enum ("ellipsize",
+ "Ellipsize",
+ "Ellipsize mode for the text cell renderer",
+ PANGO_TYPE_ELLIPSIZE_MODE,
+ PANGO_ELLIPSIZE_NONE,
+ GIMP_PARAM_READWRITE));
+}
+
+static void
+gimp_string_combo_box_init (GimpStringComboBox *combo_box)
+{
+ combo_box->priv = gimp_string_combo_box_get_instance_private (combo_box);
+}
+
+static void
+gimp_string_combo_box_constructed (GObject *object)
+{
+ GimpStringComboBoxPrivate *priv = GIMP_STRING_COMBO_BOX_GET_PRIVATE (object);
+ GtkCellRenderer *cell;
+
+ G_OBJECT_CLASS (parent_class)->constructed (object);
+
+ priv->text_renderer = cell = gtk_cell_renderer_text_new ();
+
+ gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (object), cell, TRUE);
+ gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (object), cell,
+ "text", priv->label_column,
+ NULL);
+}
+
+static void
+gimp_string_combo_box_set_property (GObject *object,
+ guint property_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ GimpStringComboBoxPrivate *priv = GIMP_STRING_COMBO_BOX_GET_PRIVATE (object);
+
+ switch (property_id)
+ {
+ case PROP_ID_COLUMN:
+ priv->id_column = g_value_get_int (value);
+ break;
+
+ case PROP_LABEL_COLUMN:
+ priv->label_column = g_value_get_int (value);
+ break;
+
+ case PROP_ELLIPSIZE:
+ g_object_set_property (G_OBJECT (priv->text_renderer),
+ pspec->name, value);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+ break;
+ }
+}
+
+static void
+gimp_string_combo_box_get_property (GObject *object,
+ guint property_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ GimpStringComboBoxPrivate *priv = GIMP_STRING_COMBO_BOX_GET_PRIVATE (object);
+
+ switch (property_id)
+ {
+ case PROP_ID_COLUMN:
+ g_value_set_int (value, priv->id_column);
+ break;
+
+ case PROP_LABEL_COLUMN:
+ g_value_set_int (value, priv->label_column);
+ break;
+
+ case PROP_ELLIPSIZE:
+ g_object_get_property (G_OBJECT (priv->text_renderer),
+ pspec->name, value);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+ break;
+ }
+}
+
+static gboolean
+gimp_string_model_lookup (GtkTreeModel *model,
+ gint column,
+ const gchar *id,
+ GtkTreeIter *iter)
+{
+ GValue value = G_VALUE_INIT;
+ gboolean iter_valid;
+
+ /* This lookup could be backed up by a hash table or some other
+ * data structure instead of doing a list traversal. But since this
+ * is a GtkComboBox, there shouldn't be many entries anyway...
+ */
+
+ for (iter_valid = gtk_tree_model_get_iter_first (model, iter);
+ iter_valid;
+ iter_valid = gtk_tree_model_iter_next (model, iter))
+ {
+ const gchar *str;
+
+ gtk_tree_model_get_value (model, iter, column, &value);
+
+ str = g_value_get_string (&value);
+
+ if (str && strcmp (str, id) == 0)
+ {
+ g_value_unset (&value);
+ break;
+ }
+
+ g_value_unset (&value);
+ }
+
+ return iter_valid;
+}
+
+
+/**
+ * gimp_string_combo_box_new:
+ * @model: a #GtkTreeModel
+ * @id_column: the model column of the ID
+ * @label_column: the modl column of the label
+ *
+ * Return value: a new #GimpStringComboBox.
+ *
+ * Since: 2.4
+ **/
+GtkWidget *
+gimp_string_combo_box_new (GtkTreeModel *model,
+ gint id_column,
+ gint label_column)
+{
+ g_return_val_if_fail (GTK_IS_TREE_MODEL (model), NULL);
+ g_return_val_if_fail (gtk_tree_model_get_column_type (model,
+ id_column) == G_TYPE_STRING, NULL);
+ g_return_val_if_fail (gtk_tree_model_get_column_type (model,
+ label_column) == G_TYPE_STRING, NULL);
+
+ return g_object_new (GIMP_TYPE_STRING_COMBO_BOX,
+ "model", model,
+ "id-column", id_column,
+ "label-column", label_column,
+ NULL);
+}
+
+/**
+ * gimp_string_combo_box_set_active:
+ * @combo_box: a #GimpStringComboBox
+ * @id: the ID of the item to select
+ *
+ * Looks up the item that belongs to the given @id and makes it the
+ * selected item in the @combo_box.
+ *
+ * Return value: %TRUE on success or %FALSE if there was no item for
+ * this value.
+ *
+ * Since: 2.4
+ **/
+gboolean
+gimp_string_combo_box_set_active (GimpStringComboBox *combo_box,
+ const gchar *id)
+{
+ g_return_val_if_fail (GIMP_IS_STRING_COMBO_BOX (combo_box), FALSE);
+
+ if (id)
+ {
+ GtkTreeModel *model;
+ GtkTreeIter iter;
+ gint column;
+
+ model = gtk_combo_box_get_model (GTK_COMBO_BOX (combo_box));
+
+ column = GIMP_STRING_COMBO_BOX_GET_PRIVATE (combo_box)->id_column;
+
+ if (gimp_string_model_lookup (model, column, id, &iter))
+ {
+ gtk_combo_box_set_active_iter (GTK_COMBO_BOX (combo_box), &iter);
+ return TRUE;
+ }
+
+ return FALSE;
+ }
+ else
+ {
+ gtk_combo_box_set_active (GTK_COMBO_BOX (combo_box), -1);
+
+ return TRUE;
+ }
+}
+
+/**
+ * gimp_string_combo_box_get_active:
+ * @combo_box: a #GimpStringComboBox
+ *
+ * Retrieves the value of the selected (active) item in the @combo_box.
+ *
+ * Return value: newly allocated ID string or %NULL if nothing was selected
+ *
+ * Since: 2.4
+ **/
+gchar *
+gimp_string_combo_box_get_active (GimpStringComboBox *combo_box)
+{
+ GtkTreeIter iter;
+
+ g_return_val_if_fail (GIMP_IS_STRING_COMBO_BOX (combo_box), NULL);
+
+ if (gtk_combo_box_get_active_iter (GTK_COMBO_BOX (combo_box), &iter))
+ {
+ GtkTreeModel *model = gtk_combo_box_get_model (GTK_COMBO_BOX (combo_box));
+ gchar *value;
+ gint column;
+
+ column = GIMP_STRING_COMBO_BOX_GET_PRIVATE (combo_box)->id_column;
+
+ gtk_tree_model_get (model, &iter,
+ column, &value,
+ -1);
+
+ return value;
+ }
+
+ return NULL;
+}
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