Initial revision

src/widget-combo.c

@@ -0,0 +1,35 @@
+// SPDX-FileCopyrightText: 2022 Geoffrey D. Bennett <g@b4.vu>
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "widget-combo.h"
+
+static void combo_box_changed(GtkWidget *widget, struct alsa_elem *elem) {
+  int value = gtk_combo_box_get_active(GTK_COMBO_BOX(widget));
+
+  alsa_set_elem_value(elem, value);
+}
+
+static void combo_box_updated(struct alsa_elem *elem) {
+  int value = alsa_get_elem_value(elem);
+  gtk_combo_box_set_active(GTK_COMBO_BOX(elem->widget), value);
+}
+
+GtkWidget *make_combo_box_alsa_elem(struct alsa_elem *elem) {
+  GtkWidget *combo_box = gtk_combo_box_text_new();
+  int count = alsa_get_item_count(elem);
+
+  for (int i = 0; i < count; i++) {
+    const char *text = alsa_get_item_name(elem, i);
+    gtk_combo_box_text_append(GTK_COMBO_BOX_TEXT(combo_box), NULL, text);
+  }
+
+  g_signal_connect(
+    combo_box, "changed", G_CALLBACK(combo_box_changed), elem
+  );
+  elem->widget = combo_box;
+  elem->widget_callback = combo_box_updated;
+
+  combo_box_updated(elem);
+
+  return combo_box;
+}