[gnome-media] Add combo box widget

[Bastien Nocera <hadess src gnome org>]

commit 45cac2205d6c95e9602c44fb3bd96ff50f096a4e
Author: Bastien Nocera <hadess hadess net>
Date:   Mon Jul 27 15:00:06 2009 +0100

    Add combo box widget
    
    A helper for the profiles and ports selection widgets.

 gnome-volume-control/src/gvc-combo-box.c |  339 ++++++++++++++++++++++++++++++
 gnome-volume-control/src/gvc-combo-box.h |   66 ++++++
 2 files changed, 405 insertions(+), 0 deletions(-)
---
diff --git a/gnome-volume-control/src/gvc-combo-box.c b/gnome-volume-control/src/gvc-combo-box.c
new file mode 100644
index 0000000..eb33706
--- /dev/null
+++ b/gnome-volume-control/src/gvc-combo-box.c
@@ -0,0 +1,339 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2009 Bastien Nocera
+ *
+ * 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 <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include <glib.h>
+#include <glib/gi18n.h>
+#include <gtk/gtk.h>
+#include <canberra-gtk.h>
+
+#include "gvc-combo-box.h"
+#include "gvc-mixer-stream.h"
+#include "gvc-mixer-card.h"
+
+#define GVC_COMBO_BOX_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), GVC_TYPE_COMBO_BOX, GvcComboBoxPrivate))
+
+struct GvcComboBoxPrivate
+{
+        GtkWidget     *drop_box;
+        GtkWidget     *start_box;
+        GtkWidget     *end_box;
+        GtkWidget     *label;
+        GtkTreeModel  *model;
+        GtkWidget     *combobox;
+        gboolean       set_called;
+        GtkSizeGroup  *size_group;
+        gboolean       symmetric;
+};
+
+enum {
+        COL_NAME,
+        COL_HUMAN_NAME,
+        NUM_COLS
+};
+
+enum {
+        CHANGED,
+        LAST_SIGNAL
+};
+
+enum {
+        PROP_0,
+        PROP_LABEL
+};
+
+static guint signals [LAST_SIGNAL] = { 0, };
+
+static void     gvc_combo_box_class_init (GvcComboBoxClass *klass);
+static void     gvc_combo_box_init       (GvcComboBox      *combo_box);
+static void     gvc_combo_box_finalize   (GObject            *object);
+
+G_DEFINE_TYPE (GvcComboBox, gvc_combo_box, GTK_TYPE_HBOX)
+
+void
+gvc_combo_box_set_size_group (GvcComboBox *combo_box,
+                              GtkSizeGroup  *group,
+                              gboolean       symmetric)
+{
+        g_return_if_fail (GVC_IS_COMBO_BOX (combo_box));
+
+        combo_box->priv->size_group = group;
+        combo_box->priv->symmetric = symmetric;
+
+        if (combo_box->priv->size_group != NULL) {
+                gtk_size_group_add_widget (combo_box->priv->size_group,
+                                           combo_box->priv->start_box);
+
+                if (combo_box->priv->symmetric) {
+                        gtk_size_group_add_widget (combo_box->priv->size_group,
+                                                   combo_box->priv->end_box);
+                }
+        }
+        gtk_widget_queue_draw (GTK_WIDGET (combo_box));
+}
+
+static void
+gvc_combo_box_set_property (GObject       *object,
+                            guint          prop_id,
+                            const GValue  *value,
+                            GParamSpec    *pspec)
+{
+        GvcComboBox *self = GVC_COMBO_BOX (object);
+
+        switch (prop_id) {
+        case PROP_LABEL:
+                gtk_label_set_text (GTK_LABEL (self->priv->label), g_value_get_string (value));
+                break;
+        default:
+                G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+                break;
+        }
+}
+
+static void
+gvc_combo_box_get_property (GObject     *object,
+                            guint        prop_id,
+                            GValue      *value,
+                            GParamSpec  *pspec)
+{
+        GvcComboBox *self = GVC_COMBO_BOX (object);
+
+        switch (prop_id) {
+        case PROP_LABEL:
+                g_value_set_string (value,
+                                    gtk_label_get_text (GTK_LABEL (self->priv->label)));
+                break;
+        default:
+                G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+                break;
+        }
+}
+
+static void
+gvc_combo_box_class_init (GvcComboBoxClass *klass)
+{
+        GObjectClass   *object_class = G_OBJECT_CLASS (klass);
+
+        object_class->finalize = gvc_combo_box_finalize;
+        object_class->set_property = gvc_combo_box_set_property;
+        object_class->get_property = gvc_combo_box_get_property;
+
+        g_object_class_install_property (object_class,
+                                         PROP_LABEL,
+                                         g_param_spec_string ("label",
+                                                              "label",
+                                                              "The combo box labale",
+                                                              _("Profile:"),
+                                                              G_PARAM_READWRITE|G_PARAM_CONSTRUCT));
+        signals [CHANGED] =
+                g_signal_new ("changed",
+                              G_TYPE_FROM_CLASS (klass),
+                              G_SIGNAL_RUN_LAST,
+                              G_STRUCT_OFFSET (GvcComboBoxClass, changed),
+                              NULL, NULL,
+                              g_cclosure_marshal_VOID__STRING,
+                              G_TYPE_NONE, 1, G_TYPE_STRING);
+
+        g_type_class_add_private (klass, sizeof (GvcComboBoxPrivate));
+}
+
+void
+gvc_combo_box_set_profiles (GvcComboBox *combo_box,
+                            const GList       *profiles)
+{
+        const GList *l;
+
+        g_return_if_fail (GVC_IS_COMBO_BOX (combo_box));
+        g_return_if_fail (combo_box->priv->set_called == FALSE);
+
+        for (l = profiles; l != NULL; l = l->next) {
+                GvcMixerCardProfile *p = l->data;
+
+                gtk_list_store_insert_with_values (GTK_LIST_STORE (combo_box->priv->model),
+                                                   NULL,
+                                                   G_MAXINT,
+                                                   COL_NAME, p->profile,
+                                                   COL_HUMAN_NAME, p->human_profile,
+                                                   -1);
+        }
+        combo_box->priv->set_called = TRUE;
+}
+
+void
+gvc_combo_box_set_ports (GvcComboBox *combo_box,
+                         const GList       *ports)
+{
+        const GList *l;
+
+        g_return_if_fail (GVC_IS_COMBO_BOX (combo_box));
+        g_return_if_fail (combo_box->priv->set_called == FALSE);
+
+        for (l = ports; l != NULL; l = l->next) {
+                GvcMixerStreamPort *p = l->data;
+
+                gtk_list_store_insert_with_values (GTK_LIST_STORE (combo_box->priv->model),
+                                                   NULL,
+                                                   G_MAXINT,
+                                                   COL_NAME, p->port,
+                                                   COL_HUMAN_NAME, p->human_port,
+                                                   -1);
+        }
+        combo_box->priv->set_called = TRUE;
+}
+
+void
+gvc_combo_box_set_active (GvcComboBox *combo_box,
+                          const char  *id)
+{
+        GtkTreeIter iter;
+        gboolean cont;
+
+        cont = gtk_tree_model_get_iter_first (combo_box->priv->model, &iter);
+        while (cont != FALSE) {
+                char *name;
+
+                gtk_tree_model_get (combo_box->priv->model, &iter,
+                                    COL_NAME, &name,
+                                    -1);
+                if (g_strcmp0 (name, id) == 0) {
+                        gtk_combo_box_set_active_iter (GTK_COMBO_BOX (combo_box->priv->combobox), &iter);
+                        return;
+                }
+                gtk_tree_model_iter_next (combo_box->priv->model, &iter);
+        }
+        g_warning ("Could not find id '%s' in combo box", id);
+}
+
+static void
+on_combo_box_changed (GtkComboBox *widget,
+                      GvcComboBox *combo_box)
+{
+        GtkTreeIter          iter;
+        char                *profile;
+
+        if (gtk_combo_box_get_active_iter (GTK_COMBO_BOX (widget), &iter) == FALSE) {
+                g_warning ("Could not find an active profile or port");
+                return;
+        }
+
+        gtk_tree_model_get (combo_box->priv->model, &iter,
+                            COL_NAME, &profile,
+                            -1);
+        g_signal_emit (combo_box, signals[CHANGED], 0, profile);
+        g_free (profile);
+}
+
+static void
+gvc_combo_box_init (GvcComboBox *combo_box)
+{
+        GtkWidget *frame;
+        GtkWidget            *box;
+        GtkWidget            *sbox;
+        GtkWidget            *ebox;
+        GtkCellRenderer      *renderer;
+
+
+        combo_box->priv = GVC_COMBO_BOX_GET_PRIVATE (combo_box);
+
+        combo_box->priv->model = GTK_TREE_MODEL (gtk_list_store_new (NUM_COLS,
+                                                                     G_TYPE_STRING,
+                                                                     G_TYPE_STRING));
+
+        combo_box->priv->label = gtk_label_new (NULL);
+        gtk_misc_set_alignment (GTK_MISC (combo_box->priv->label),
+                                0.0,
+                                0.5);
+
+        /* frame */
+        frame = gtk_frame_new (NULL);
+        gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_NONE);
+        gtk_container_add (GTK_CONTAINER (combo_box), frame);
+
+        combo_box->priv->drop_box = box = gtk_hbox_new (FALSE, 6);
+        combo_box->priv->combobox = gtk_combo_box_new_with_model (combo_box->priv->model);
+        renderer = gtk_cell_renderer_text_new ();
+        gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (combo_box->priv->combobox),
+                                    renderer, FALSE);
+        gtk_cell_layout_add_attribute (GTK_CELL_LAYOUT (combo_box->priv->combobox),
+                                       renderer,
+                                       "text", COL_HUMAN_NAME);
+
+        gtk_widget_set_size_request (combo_box->priv->combobox, 128, -1);
+
+        combo_box->priv->start_box = sbox = gtk_hbox_new (FALSE, 6);
+        gtk_box_pack_start (GTK_BOX (box), sbox, FALSE, FALSE, 0);
+
+        gtk_box_pack_start (GTK_BOX (sbox), combo_box->priv->label, FALSE, FALSE, 0);
+
+        gtk_box_pack_start (GTK_BOX (box), combo_box->priv->combobox, TRUE, TRUE, 0);
+
+        combo_box->priv->end_box = ebox = gtk_hbox_new (FALSE, 6);
+        gtk_box_pack_start (GTK_BOX (box), ebox, FALSE, FALSE, 0);
+
+        if (combo_box->priv->size_group != NULL) {
+                gtk_size_group_add_widget (combo_box->priv->size_group, sbox);
+
+                if (combo_box->priv->symmetric) {
+                        gtk_size_group_add_widget (combo_box->priv->size_group, ebox);
+                }
+        }
+
+        gtk_container_add (GTK_CONTAINER (frame), combo_box->priv->drop_box);
+        gtk_widget_show_all (frame);
+        gtk_label_set_mnemonic_widget (GTK_LABEL (combo_box->priv->label),
+                                       combo_box->priv->combobox);
+
+        g_signal_connect (G_OBJECT (combo_box->priv->combobox), "changed",
+                          G_CALLBACK (on_combo_box_changed), combo_box);
+}
+
+static void
+gvc_combo_box_finalize (GObject *object)
+{
+        GvcComboBox *combo_box;
+
+        g_return_if_fail (object != NULL);
+        g_return_if_fail (GVC_IS_COMBO_BOX (object));
+
+        combo_box = GVC_COMBO_BOX (object);
+
+        g_return_if_fail (combo_box->priv != NULL);
+
+        g_object_unref (combo_box->priv->model);
+        combo_box->priv->model = NULL;
+
+        G_OBJECT_CLASS (gvc_combo_box_parent_class)->finalize (object);
+}
+
+GtkWidget *
+gvc_combo_box_new (const char *label)
+{
+        GObject *combo_box;
+        combo_box = g_object_new (GVC_TYPE_COMBO_BOX,
+                                  "label", label,
+                                  NULL);
+        return GTK_WIDGET (combo_box);
+}
+
diff --git a/gnome-volume-control/src/gvc-combo-box.h b/gnome-volume-control/src/gvc-combo-box.h
new file mode 100644
index 0000000..a325d93
--- /dev/null
+++ b/gnome-volume-control/src/gvc-combo-box.h
@@ -0,0 +1,66 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2009 Red Hat, Inc.
+ *
+ * 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.
+ *
+ */
+
+#ifndef __GVC_COMBO_BOX_H
+#define __GVC_COMBO_BOX_H
+
+#include <glib-object.h>
+
+G_BEGIN_DECLS
+
+#define GVC_TYPE_COMBO_BOX         (gvc_combo_box_get_type ())
+#define GVC_COMBO_BOX(o)           (G_TYPE_CHECK_INSTANCE_CAST ((o), GVC_TYPE_COMBO_BOX, GvcComboBox))
+#define GVC_COMBO_BOX_CLASS(k)     (G_TYPE_CHECK_CLASS_CAST((k), GVC_TYPE_COMBO_BOX, GvcComboBoxClass))
+#define GVC_IS_COMBO_BOX(o)        (G_TYPE_CHECK_INSTANCE_TYPE ((o), GVC_TYPE_COMBO_BOX))
+#define GVC_IS_COMBO_BOX_CLASS(k)  (G_TYPE_CHECK_CLASS_TYPE ((k), GVC_TYPE_COMBO_BOX))
+#define GVC_COMBO_BOX_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), GVC_TYPE_COMBO_BOX, GvcComboBoxClass))
+
+typedef struct GvcComboBoxPrivate GvcComboBoxPrivate;
+
+typedef struct
+{
+        GtkHBox               parent;
+        GvcComboBoxPrivate *priv;
+} GvcComboBox;
+
+typedef struct
+{
+        GtkHBoxClass          parent_class;
+        void (* changed)       (GvcComboBox *combobox, const char *name);
+} GvcComboBoxClass;
+
+GType               gvc_combo_box_get_type            (void);
+
+GtkWidget *         gvc_combo_box_new                 (const char   *label);
+
+void                gvc_combo_box_set_size_group      (GvcComboBox  *combo_box,
+                                                       GtkSizeGroup *group,
+                                                       gboolean      symmetric);
+
+void                gvc_combo_box_set_profiles        (GvcComboBox  *combo_box,
+                                                       const GList  *profiles);
+void                gvc_combo_box_set_ports           (GvcComboBox  *combo_box,
+                                                       const GList  *ports);
+void                gvc_combo_box_set_active          (GvcComboBox  *combo_box,
+                                                       const char   *id);
+
+G_END_DECLS
+
+#endif /* __GVC_COMBO_BOX_H */