Now setting values

src/callbacks.c

@@ -177,7 +177,7 @@ void on_set_toggled(GtkWidget * widget, gpointer data)
 /* on_value_changed */
 void on_value_changed(GtkWidget * widget, gdouble value, gpointer data)
 {
-#ifdef DEBUG
-	fprintf(stderr, "DEBUG: %s(%lf)\n", __func__, value);
-#endif
+	Mixer * mixer = data;
+
+	mixer_set_value(mixer, widget, value);
 }

src/mixer.c

@@ -20,6 +20,7 @@
 #include <fcntl.h>
 #include <unistd.h>
 #include <stdlib.h>
+#include <errno.h>
 #include <gtk/gtk.h>
 #include <gdk/gdkkeysyms.h>
 #include <Desktop.h>
@@ -332,6 +333,27 @@ void mixer_delete(Mixer * mixer)
 }
 
 
+/* accessors */
+/* mixer_set_value */
+void mixer_set_value(Mixer * mixer, GtkWidget * widget, gdouble value)
+{
+	mixer_ctrl_t * p;
+	u_char * level;
+
+#ifdef DEBUG
+	fprintf(stderr, "DEBUG: %s(%lf)\n", __func__, value);
+#endif
+	p = g_object_get_data(G_OBJECT(widget), "ctrl");
+	level = g_object_get_data(G_OBJECT(widget), "channel");
+	if(p == NULL || level == NULL)
+		return;
+	*level = value * 255;
+	if(ioctl(mixer->fd, AUDIO_MIXER_WRITE, p) != 0)
+		fprintf(stderr, "%s: %s: %s\n", PACKAGE, "AUDIO_MIXER_WRITE",
+				strerror(errno));
+}
+
+
 /* useful */
 /* mixer_properties */
 void mixer_properties(Mixer * mixer)

src/mixer.h

@@ -18,6 +18,8 @@
 #ifndef MIXER_MIXER_H
 # define MIXER_MIXER_H
 
+# include <gtk/gtk.h> /* XXX should not be necessary */
+
 
 /* Mixer */
 /* types */
@@ -28,6 +30,9 @@ typedef struct _Mixer Mixer;
 Mixer * mixer_new(void);
 void mixer_delete(Mixer * mixer);
 
+/* accessors */
+void mixer_set_value(Mixer * mixer, GtkWidget * widget, gdouble value);
+
 /* useful */
 void mixer_properties(Mixer * mixer);