Fix some TODOs

src/alsa_card.rs

@@ -92,9 +92,6 @@ impl AlsaCard {
                                  cb: cb,
                              });
 
-        /* TODO: callback is registered here, which must be unregistered
-         * when the card is destroyed!!
-         * poll descriptors must be unwatched too */
         let watch_ids = AlsaCard::watch_poll_descriptors(vec_pollfd,
                                                          acard.as_ref());
         acard.watch_ids.set(watch_ids);
@@ -199,7 +196,6 @@ impl AlsaCard {
 }
 
 
-// TODO: test that this is actually triggered when switching cards
 impl Drop for AlsaCard {
     // call Box::new(x), transmute the Box into a raw pointer, and then
     // std::mem::forget
@@ -258,7 +254,6 @@ extern "C" fn watch_cb(chan: *mut glib_sys::GIOChannel,
                 debug!("G_IO_STATUS_AGAIN");
                 continue;
             }
-            // TODO: handle these failure cases
             glib_sys::G_IO_STATUS_NORMAL => {
                 error!("Alsa failed to clear the channel");
                 cb(AlsaEvent::AlsaCardError);

src/audio.rs

@@ -181,6 +181,21 @@ impl Audio {
             *rc = glib::get_monotonic_time();
         }
 
+        let alsa_vol = percent_to_vol(new_vol,
+                                      self.acard.borrow().get_volume_range(),
+                                      dir)?;
+
+        /* only invoke handlers etc. if volume did actually change */
+        {
+            let old_alsa_vol = percent_to_vol(self.vol()?,
+                                          self.acard.borrow().get_volume_range(),
+                                          dir)?;
+
+            if old_alsa_vol == alsa_vol {
+                return Ok(());
+            }
+        }
+
         /* auto-unmute */
         if self.has_mute() && self.get_mute()? {
             self.set_mute(false, user)?;
@@ -198,14 +213,10 @@ impl Audio {
                new_vol,
                user);
 
-        let alsa_vol = percent_to_vol(new_vol,
-                                      self.acard.borrow().get_volume_range(),
-                                      dir)?;
         self.acard
             .borrow()
             .set_vol(alsa_vol)?;
 
-        // TODO: only invoke handlers if volume did not change
         invoke_handlers(&self.handlers.borrow(),
                         AudioSignal::ValuesChanged,
                         user);
@@ -313,7 +324,6 @@ fn on_alsa_event(last_action_timestamp: &mut i64,
 
     /* external change */
     match alsa_event {
-        // TODO: invoke handlers with AudioUserUnknown
         AlsaEvent::AlsaCardError => {
             invoke_handlers(handlers,
                             self::AudioSignal::CardError,

src/prefs.rs

@@ -101,17 +101,17 @@ impl Default for ViewPrefs {
 #[derive(Deserialize, Debug, Serialize)]
 #[serde(default)]
 pub struct VolColor {
-    pub red: u8,
+    pub red: f64,
-    pub green: u8,
+    pub green: f64,
-    pub blue: u8,
+    pub blue: f64,
 }
 
 impl Default for VolColor {
     fn default() -> VolColor {
         return VolColor {
-                   red: 245,
+                   red: 0.960784313725,
-                   green: 180,
+                   green: 0.705882352941,
-                   blue: 0,
+                   blue: 0.0,
                };
     }
 }

src/support_audio.rs

@@ -3,6 +3,7 @@ use errors::*;
 use prefs::*;
 
 
+#[derive(Clone, Copy, Debug)]
 pub enum VolDir {
     Up,
     Down,

src/ui_prefs_dialog.rs

@@ -111,11 +111,10 @@ impl PrefsDialog {
         self.vol_meter_pos_spin.set_value(prefs.view_prefs.vol_meter_offset as
                                           f64);
 
-        // TODO don't convert like that
         let rgba = gdk::RGBA {
-            red: prefs.view_prefs.vol_meter_color.red as f64 / 255.0,
+            red: prefs.view_prefs.vol_meter_color.red,
-            green: prefs.view_prefs.vol_meter_color.green as f64 / 255.0,
+            green: prefs.view_prefs.vol_meter_color.green,
-            blue: prefs.view_prefs.vol_meter_color.blue as f64 / 255.0,
+            blue: prefs.view_prefs.vol_meter_color.blue,
             alpha: 1.0,
         };
         self.vol_meter_color_button.set_rgba(&rgba);
@@ -162,22 +161,27 @@ impl PrefsDialog {
 
 
     fn to_prefs(&self) -> Prefs {
-        // TODO: remove duplication with default instance
+        let card = self.card_combo.get_active_text();
+        let channel = self.chan_combo.get_active_text();
+
+        if card.is_none() || channel.is_none() {
+            return Prefs::default();
+        }
+
         let device_prefs =
             DevicePrefs {
                 card: self.card_combo
                     .get_active_text()
-                    .unwrap_or(String::from("(default)")),
+                    .unwrap(),
                 channel: self.chan_combo
                     .get_active_text()
-                    .unwrap_or(String::from("Master")),
+                    .unwrap(),
             };
 
-        // TODO save raw values?
         let vol_meter_color = VolColor {
-            red: (self.vol_meter_color_button.get_rgba().red * 255.0) as u8,
+            red: (self.vol_meter_color_button.get_rgba().red),
-            green: (self.vol_meter_color_button.get_rgba().green * 255.0) as u8,
+            green: (self.vol_meter_color_button.get_rgba().green),
-            blue: (self.vol_meter_color_button.get_rgba().blue * 255.0) as u8,
+            blue: (self.vol_meter_color_button.get_rgba().blue),
         };
 
         let view_prefs = ViewPrefs {

src/ui_tray_icon.rs

@@ -159,9 +159,9 @@ pub struct VolMeter {
 impl VolMeter {
     fn new(prefs: &Prefs) -> VolMeter {
         return VolMeter {
-                   red: prefs.view_prefs.vol_meter_color.red,
+                   red: (prefs.view_prefs.vol_meter_color.red * 255.0) as u8,
-                   green: prefs.view_prefs.vol_meter_color.green,
+                   green: (prefs.view_prefs.vol_meter_color.green * 255.0) as u8,
-                   blue: prefs.view_prefs.vol_meter_color.blue,
+                   blue: (prefs.view_prefs.vol_meter_color.blue * 255.0) as u8,
                    x_offset_pct: prefs.view_prefs.vol_meter_offset as i64,
                    y_offset_pct: 10,
                    /* dynamic */