From ca28ad51eded91d57968f3c446cdc5ed6fef0169 Mon Sep 17 00:00:00 2001
From: Julian Ospald <hasufell@posteo.de>
Date: Fri, 7 Jul 2017 00:28:55 +0200
Subject: [PATCH] Lol

---
 src/alsa_card.rs       |  78 ++++++------
 src/app_state.rs       | 261 +++++++++++++++++++++++++++++++++--------
 src/audio.rs           | 217 ++++++++++++++++++----------------
 src/prefs.rs           | 100 ++++++++++------
 src/support_alsa.rs    |   4 +-
 src/support_ui.rs      |  23 ++--
 src/ui_entry.rs        |  22 ++--
 src/ui_popup_menu.rs   |  16 ++-
 src/ui_popup_window.rs | 115 +++++++++---------
 src/ui_prefs_dialog.rs | 153 +++++++++++++-----------
 src/ui_tray_icon.rs    | 122 ++++++++-----------
 11 files changed, 662 insertions(+), 449 deletions(-)

diff --git a/src/alsa_card.rs b/src/alsa_card.rs
index 612331f3c..f55bf374e 100644
--- a/src/alsa_card.rs
+++ b/src/alsa_card.rs
@@ -36,11 +36,10 @@ pub struct AlsaCard {
 
 
 impl AlsaCard {
-    pub fn new(
-        card_name: Option<String>,
-        elem_name: Option<String>,
-        cb: Rc<Fn(AlsaEvent)>,
-    ) -> Result<Box<AlsaCard>> {
+    pub fn new(card_name: Option<String>,
+               elem_name: Option<String>,
+               cb: Rc<Fn(AlsaEvent)>)
+               -> Result<Box<AlsaCard>> {
         let card = {
             match card_name {
                 Some(name) => get_alsa_card_by_name(name)?,
@@ -51,26 +50,26 @@ impl AlsaCard {
 
         let vec_pollfd = PollDescriptors::get(&mixer)?;
 
-        let selem_id = get_selem_by_name(
-            &mixer,
-            elem_name.unwrap_or(String::from("Master")),
-        ).unwrap()
-            .get_id();
+        let selem_id =
+            get_selem_by_name(&mixer,
+                              elem_name.unwrap_or(String::from("Master")))
+                    .unwrap()
+                    .get_id();
 
         let acard = Box::new(AlsaCard {
-            _cannot_construct: (),
-            card: card,
-            mixer: mixer,
-            selem_id: selem_id,
-            watch_ids: Cell::new(vec![]),
-            cb: cb,
-        });
+                                 _cannot_construct: (),
+                                 card: card,
+                                 mixer: mixer,
+                                 selem_id: selem_id,
+                                 watch_ids: Cell::new(vec![]),
+                                 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());
+        let watch_ids = AlsaCard::watch_poll_descriptors(vec_pollfd,
+                                                         acard.as_ref());
         acard.watch_ids.set(watch_ids);
 
         return Ok(acard);
@@ -83,7 +82,9 @@ impl AlsaCard {
 
 
     pub fn chan_name(&self) -> Result<String> {
-        let n = self.selem_id.get_name().map(|y| String::from(y))?;
+        let n = self.selem_id
+            .get_name()
+            .map(|y| String::from(y))?;
         return Ok(n);
     }
 
@@ -112,9 +113,7 @@ impl AlsaCard {
         }
 
         let range = selem.get_playback_volume_range();
-        selem.set_playback_volume_all(
-            percent_to_vol(new_vol, range),
-        )?;
+        selem.set_playback_volume_all(percent_to_vol(new_vol, range))?;
 
         return Ok(());
     }
@@ -141,10 +140,9 @@ impl AlsaCard {
     }
 
 
-    fn watch_poll_descriptors(
-        polls: Vec<pollfd>,
-        acard: &AlsaCard,
-    ) -> Vec<c_uint> {
+    fn watch_poll_descriptors(polls: Vec<pollfd>,
+                              acard: &AlsaCard)
+                              -> Vec<c_uint> {
         let mut watch_ids: Vec<c_uint> = vec![];
         let acard_ptr =
             unsafe { mem::transmute::<&AlsaCard, glib_sys::gpointer>(acard) };
@@ -201,11 +199,10 @@ impl Drop for AlsaCard {
 }
 
 
-extern "C" fn watch_cb(
-    chan: *mut glib_sys::GIOChannel,
-    cond: glib_sys::GIOCondition,
-    data: glib_sys::gpointer,
-) -> glib_sys::gboolean {
+extern "C" fn watch_cb(chan: *mut glib_sys::GIOChannel,
+                       cond: glib_sys::GIOCondition,
+                       data: glib_sys::gpointer)
+                       -> glib_sys::gboolean {
 
     let acard =
         unsafe { mem::transmute::<glib_sys::gpointer, &AlsaCard>(data) };
@@ -224,15 +221,14 @@ extern "C" fn watch_cb(
     let mut buf: Vec<u8> = vec![0; 256];
 
     while sread > 0 {
-        let stat: glib_sys::GIOStatus = unsafe {
-            glib_sys::g_io_channel_read_chars(
-                chan,
-                buf.as_mut_ptr() as *mut u8,
-                256,
-                &mut sread as *mut size_t,
-                ptr::null_mut(),
-            )
-        };
+        let stat: glib_sys::GIOStatus =
+            unsafe {
+                glib_sys::g_io_channel_read_chars(chan,
+                                                  buf.as_mut_ptr() as *mut u8,
+                                                  256,
+                                                  &mut sread as *mut size_t,
+                                                  ptr::null_mut())
+            };
 
         match stat {
             glib_sys::G_IO_STATUS_AGAIN => {
diff --git a/src/app_state.rs b/src/app_state.rs
index 8e837a797..b41f375bf 100644
--- a/src/app_state.rs
+++ b/src/app_state.rs
@@ -1,6 +1,13 @@
 use audio::Audio;
+use gdk;
 use gtk;
-use prefs::Prefs;
+use gtk::ComboBoxTextExt;
+use gtk::ComboBoxExt;
+use gtk::ToggleButtonExt;
+use gtk::SpinButtonExt;
+use gtk::ColorChooserExt;
+use gtk::EntryExt;
+use prefs::*;
 use ui_tray_icon::TrayIcon;
 use std::cell::RefCell;
 
@@ -18,21 +25,19 @@ pub struct AppS {
 
 impl AppS {
     pub fn new() -> AppS {
-        let builder_popup_window = gtk::Builder::new_from_string(include_str!(
-            "../data/ui/popup-window.glade"
-        ));
-        let builder_popup_menu = gtk::Builder::new_from_string(
-            include_str!("../data/ui/popup-menu.glade"),
-        );
+        let builder_popup_window =
+            gtk::Builder::new_from_string(include_str!("../data/ui/popup-window.glade"));
+        let builder_popup_menu = gtk::Builder::new_from_string(include_str!("../data/ui/popup-menu.glade"));
         let prefs = RefCell::new(Prefs::new().unwrap());
         let gui =
             Gui::new(builder_popup_window, builder_popup_menu, &prefs.borrow());
 
         return AppS {
-            gui: gui,
-            audio: Audio::new(None, Some(String::from("Master"))).unwrap(),
-            prefs: prefs,
-        };
+                   gui: gui,
+                   audio: Audio::new(None, Some(String::from("Master")))
+                       .unwrap(),
+                   prefs: prefs,
+               };
     }
 }
 
@@ -41,66 +46,228 @@ pub struct Gui {
     pub tray_icon: TrayIcon,
     pub popup_window: PopupWindow,
     pub popup_menu: PopupMenu,
-    /* prefs_dialog is dynamically created and destroyed,
-     * not part of the global app-state */
+    /* prefs_dialog is dynamically created and destroyed */
     pub prefs_dialog: RefCell<Option<PrefsDialog>>,
 }
 
 
 impl Gui {
-    pub fn new(
-        builder_popup_window: gtk::Builder,
-        builder_popup_menu: gtk::Builder,
-        prefs: &Prefs,
-    ) -> Gui {
+    pub fn new(builder_popup_window: gtk::Builder,
+               builder_popup_menu: gtk::Builder,
+               prefs: &Prefs)
+               -> Gui {
         return Gui {
-            tray_icon: TrayIcon::new(prefs).unwrap(),
-            popup_window: PopupWindow::new(builder_popup_window),
-            popup_menu: PopupMenu::new(builder_popup_menu),
-            prefs_dialog: RefCell::new(None),
-        };
+                   tray_icon: TrayIcon::new(prefs).unwrap(),
+                   popup_window: PopupWindow::new(builder_popup_window),
+                   popup_menu: PopupMenu::new(builder_popup_menu),
+                   prefs_dialog: RefCell::new(None),
+               };
     }
 }
 
 
-create_builder_item!(
-    PopupWindow,
-    popup_window: gtk::Window,
-    vol_scale_adj: gtk::Adjustment,
-    vol_scale: gtk::Scale,
-    mute_check: gtk::CheckButton
-);
+create_builder_item!(PopupWindow,
+                     popup_window: gtk::Window,
+                     vol_scale_adj: gtk::Adjustment,
+                     vol_scale: gtk::Scale,
+                     mute_check: gtk::CheckButton);
 
 
-create_builder_item!(
-    PopupMenu,
-    menu_window: gtk::Window,
-    menubar: gtk::MenuBar,
-    menu: gtk::Menu,
-    about_item: gtk::MenuItem,
-    prefs_item: gtk::MenuItem
-);
+create_builder_item!(PopupMenu,
+                     menu_window: gtk::Window,
+                     menubar: gtk::MenuBar,
+                     menu: gtk::Menu,
+                     about_item: gtk::MenuItem,
+                     prefs_item: gtk::MenuItem);
 
 
 pub struct PrefsDialog {
     pub prefs_dialog: gtk::Dialog,
+
+    /* DevicePrefs */
     pub card_combo: gtk::ComboBoxText,
     pub chan_combo: gtk::ComboBoxText,
-    pub response_callback: Box<Fn(PrefsDialog, i64)>,
+
+    /* ViewPrefs */
+    pub vol_meter_draw_check: gtk::CheckButton,
+    pub vol_meter_pos_spin: gtk::SpinButton,
+    pub vol_meter_color_button: gtk::ColorButton,
+    pub system_theme: gtk::CheckButton,
+
+    /* BehaviorPrefs */
+    pub vol_control_entry: gtk::Entry,
+    pub scroll_step_spin: gtk::SpinButton,
+    pub middle_click_combo: gtk::ComboBoxText,
+    pub custom_entry: gtk::Entry,
+
+    /* NotifyPrefs */
+    pub noti_enable_check: gtk::CheckButton,
+    pub noti_timeout_spin: gtk::SpinButton,
+    // pub noti_hotkey_check: gtk::CheckButton,
+    pub noti_mouse_check: gtk::CheckButton,
+    pub noti_popup_check: gtk::CheckButton,
+    pub noti_ext_check: gtk::CheckButton,
 }
 
 impl PrefsDialog {
-    pub fn new(
-        response_callback: Box<Fn(PrefsDialog, i64)>,
-    ) -> PrefsDialog {
-        let builder = gtk::Builder::new_from_string(
-            include_str!("../data/ui/prefs-dialog.glade"),
-        );
-        return PrefsDialog {
+    pub fn new() -> PrefsDialog {
+        let builder = gtk::Builder::new_from_string(include_str!("../data/ui/prefs-dialog.glade"));
+        let prefs_dialog = PrefsDialog {
             prefs_dialog: builder.get_object("prefs_dialog").unwrap(),
+
             card_combo: builder.get_object("card_combo").unwrap(),
             chan_combo: builder.get_object("chan_combo").unwrap(),
-            response_callback,
+
+            vol_meter_draw_check: builder.get_object("vol_meter_draw_check")
+                .unwrap(),
+            vol_meter_pos_spin: builder.get_object("vol_meter_pos_spin")
+                .unwrap(),
+            vol_meter_color_button: builder.get_object("vol_meter_color_button")
+                .unwrap(),
+            system_theme: builder.get_object("system_theme").unwrap(),
+
+            vol_control_entry: builder.get_object("vol_control_entry").unwrap(),
+            scroll_step_spin: builder.get_object("scroll_step_spin").unwrap(),
+            middle_click_combo: builder.get_object("middle_click_combo")
+                .unwrap(),
+            custom_entry: builder.get_object("custom_entry").unwrap(),
+
+            noti_enable_check: builder.get_object("noti_enable_check").unwrap(),
+            noti_timeout_spin: builder.get_object("noti_timeout_spin").unwrap(),
+            // noti_hotkey_check: builder.get_object("noti_hotkey_check").unwrap(),
+            noti_mouse_check: builder.get_object("noti_mouse_check").unwrap(),
+            noti_popup_check: builder.get_object("noti_popup_check").unwrap(),
+            noti_ext_check: builder.get_object("noti_ext_check").unwrap(),
         };
+
+
+        return prefs_dialog;
+    }
+
+
+    pub fn from_prefs(&self, prefs: &Prefs) {
+        /* DevicePrefs */
+        self.card_combo.remove_all();
+        self.card_combo.append_text(prefs.device_prefs.card.as_str());
+        self.card_combo.set_active(0);
+
+        self.chan_combo.remove_all();
+        self.chan_combo.append_text(prefs.device_prefs.channel.as_str());
+        self.chan_combo.set_active(0);
+
+        /* ViewPrefs */
+        self.vol_meter_draw_check.set_active(prefs.view_prefs.draw_vol_meter);
+        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,
+            green: prefs.view_prefs.vol_meter_color.green as f64 / 255.0,
+            blue: prefs.view_prefs.vol_meter_color.blue as f64 / 255.0,
+            alpha: 1.0,
+        };
+        self.vol_meter_color_button.set_rgba(&rgba);
+        self.system_theme.set_active(prefs.view_prefs.system_theme);
+
+        /* BehaviorPrefs */
+        self.vol_control_entry.set_text(prefs.behavior_prefs
+                                            .vol_control_cmd
+                                            .as_ref()
+                                            .unwrap_or(&String::from(""))
+                                            .as_str());
+        self.scroll_step_spin.set_value(prefs.behavior_prefs.vol_scroll_step);
+
+        // TODO: make sure these values always match, must be a better way
+        //       also check to_prefs()
+        self.middle_click_combo.append_text("Toggle Mute");
+        self.middle_click_combo.append_text("Show Preferences");
+        self.middle_click_combo.append_text("Volume Control");
+        self.middle_click_combo.append_text("Custom Command");
+        self.middle_click_combo.set_active(prefs.behavior_prefs
+                                               .middle_click_action
+                                               .into());
+        self.custom_entry.set_text(prefs.behavior_prefs
+                                       .custom_command
+                                       .as_ref()
+                                       .unwrap_or(&String::from(""))
+                                       .as_str());
+
+        /* NotifyPrefs */
+        self.noti_enable_check
+            .set_active(prefs.notify_prefs.enable_notifications);
+        self.noti_timeout_spin
+            .set_value(prefs.notify_prefs.notifcation_timeout as f64);
+        self.noti_mouse_check
+            .set_active(prefs.notify_prefs.notify_mouse_scroll);
+        self.noti_popup_check.set_active(prefs.notify_prefs.notify_popup);
+        self.noti_ext_check.set_active(prefs.notify_prefs.notify_external);
+    }
+
+
+    pub fn to_prefs(&self) -> Prefs {
+        // TODO: remove duplication with default instance
+        let device_prefs =
+            DevicePrefs {
+                card: self.card_combo
+                    .get_active_text()
+                    .unwrap_or(String::from("(default)")),
+                channel: self.chan_combo
+                    .get_active_text()
+                    .unwrap_or(String::from("Master")),
+            };
+
+        // TODO don't convert like that
+        let vol_meter_color = VolColor {
+            red: (self.vol_meter_color_button.get_rgba().red * 255.0) as u8,
+            green: (self.vol_meter_color_button.get_rgba().green * 255.0) as u8,
+            blue: (self.vol_meter_color_button.get_rgba().blue * 255.0) as u8,
+        };
+
+        let view_prefs = ViewPrefs {
+            draw_vol_meter: self.vol_meter_draw_check.get_active(),
+            vol_meter_offset: self.vol_meter_pos_spin.get_value_as_int(),
+            system_theme: self.system_theme.get_active(),
+            vol_meter_color,
+        };
+
+        let vol_control_cmd =
+            self.vol_control_entry.get_text().and_then(|x| if x.is_empty() {
+                                                           None
+                                                       } else {
+                                                           Some(x)
+                                                       });
+
+        let custom_command =
+            self.custom_entry.get_text().and_then(|x| if x.is_empty() {
+                                                      None
+                                                  } else {
+                                                      Some(x)
+                                                  });
+
+        let behavior_prefs = BehaviorPrefs {
+            vol_control_cmd,
+            vol_scroll_step: self.scroll_step_spin.get_value(),
+            middle_click_action: From::from(self.middle_click_combo
+                                                .get_active()),
+            custom_command,
+        };
+
+        let notify_prefs = NotifyPrefs {
+            enable_notifications: self.noti_enable_check.get_active(),
+            notifcation_timeout: self.noti_timeout_spin.get_value_as_int() as
+                                 i64,
+            notify_mouse_scroll: self.noti_mouse_check.get_active(),
+            notify_popup: self.noti_popup_check.get_active(),
+            notify_external: self.noti_ext_check.get_active(),
+        };
+
+        return Prefs {
+                   device_prefs,
+                   view_prefs,
+                   behavior_prefs,
+                   notify_prefs,
+               };
+
     }
 }
diff --git a/src/audio.rs b/src/audio.rs
index f5c3a8ad9..d2c992d4c 100644
--- a/src/audio.rs
+++ b/src/audio.rs
@@ -73,10 +73,9 @@ pub struct Audio {
 
 
 impl Audio {
-    pub fn new(
-        card_name: Option<String>,
-        elem_name: Option<String>,
-    ) -> Result<Audio> {
+    pub fn new(card_name: Option<String>,
+               elem_name: Option<String>)
+               -> Result<Audio> {
 
         let handlers = Handlers::new();
         let last_action_timestamp = Rc::new(RefCell::new(0));
@@ -85,8 +84,10 @@ impl Audio {
             let myhandler = handlers.clone();
             let ts = last_action_timestamp.clone();
             Rc::new(move |event| {
-                on_alsa_event(&mut *ts.borrow_mut(), &myhandler.borrow(), event)
-            })
+                        on_alsa_event(&mut *ts.borrow_mut(),
+                                      &myhandler.borrow(),
+                                      event)
+                    })
         };
 
         let audio = Audio {
@@ -101,40 +102,44 @@ impl Audio {
     }
 
 
-    pub fn switch_acard(
-        &self,
-        card_name: Option<String>,
-        elem_name: Option<String>,
-        user: AudioUser,
-    ) -> Result<()> {
+    pub fn switch_acard(&self,
+                        card_name: Option<String>,
+                        elem_name: Option<String>,
+                        user: AudioUser)
+                        -> Result<()> {
         debug!("Switching cards");
-        debug!(
-            "Old card name: {}",
-            self.acard.borrow().card_name().unwrap()
-        );
-        debug!(
-            "Old chan name: {}",
-            self.acard.borrow().chan_name().unwrap()
-        );
-        let cb = self.acard.borrow().cb.clone();
+        debug!("Old card name: {}",
+               self.acard
+                   .borrow()
+                   .card_name()
+                   .unwrap());
+        debug!("Old chan name: {}",
+               self.acard
+                   .borrow()
+                   .chan_name()
+                   .unwrap());
+        let cb = self.acard
+            .borrow()
+            .cb
+            .clone();
         {
             let mut ac = self.acard.borrow_mut();
             *ac = AlsaCard::new(card_name, elem_name, cb)?;
         }
-        debug!(
-            "Old card name: {}",
-            self.acard.borrow().card_name().unwrap()
-        );
-        debug!(
-            "Old chan name: {}",
-            self.acard.borrow().chan_name().unwrap()
-        );
+        debug!("Old card name: {}",
+               self.acard
+                   .borrow()
+                   .card_name()
+                   .unwrap());
+        debug!("Old chan name: {}",
+               self.acard
+                   .borrow()
+                   .chan_name()
+                   .unwrap());
 
-        invoke_handlers(
-            &self.handlers.borrow(),
-            AudioSignal::CardInitialized,
-            user,
-        );
+        invoke_handlers(&self.handlers.borrow(),
+                        AudioSignal::CardInitialized,
+                        user);
 
         return Ok(());
     }
@@ -167,20 +172,24 @@ impl Audio {
             *rc = glib::get_monotonic_time();
         }
 
-        debug!(
-            "Setting vol on card {:?} and chan {:?} to {:?} by user {:?}",
-            self.acard.borrow().card_name().unwrap(),
-            self.acard.borrow().chan_name().unwrap(),
-            new_vol,
-            user
-        );
-        self.acard.borrow().set_vol(new_vol)?;
+        debug!("Setting vol on card {:?} and chan {:?} to {:?} by user {:?}",
+               self.acard
+                   .borrow()
+                   .card_name()
+                   .unwrap(),
+               self.acard
+                   .borrow()
+                   .chan_name()
+                   .unwrap(),
+               new_vol,
+               user);
+        self.acard
+            .borrow()
+            .set_vol(new_vol)?;
 
-        invoke_handlers(
-            &self.handlers.borrow(),
-            AudioSignal::ValuesChanged,
-            user,
-        );
+        invoke_handlers(&self.handlers.borrow(),
+                        AudioSignal::ValuesChanged,
+                        user);
         return Ok(());
     }
 
@@ -193,21 +202,23 @@ impl Audio {
         let old_vol = self.vol()?;
         let new_vol = f64::ceil(old_vol + (self.scroll_step.get() as f64));
 
-        debug!(
-            "Increase vol on card {:?} and chan {:?} by {:?} to {:?}",
-            self.acard.borrow().card_name().unwrap(),
-            self.acard.borrow().chan_name().unwrap(),
-            (new_vol - old_vol),
-            new_vol
-        );
+        debug!("Increase vol on card {:?} and chan {:?} by {:?} to {:?}",
+               self.acard
+                   .borrow()
+                   .card_name()
+                   .unwrap(),
+               self.acard
+                   .borrow()
+                   .chan_name()
+                   .unwrap(),
+               (new_vol - old_vol),
+               new_vol);
 
         self.set_vol(new_vol, user)?;
 
-        invoke_handlers(
-            &self.handlers.borrow(),
-            AudioSignal::ValuesChanged,
-            user,
-        );
+        invoke_handlers(&self.handlers.borrow(),
+                        AudioSignal::ValuesChanged,
+                        user);
         return Ok(());
     }
 
@@ -220,21 +231,23 @@ impl Audio {
         let old_vol = self.vol()?;
         let new_vol = old_vol - (self.scroll_step.get() as f64);
 
-        debug!(
-            "Decrease vol on card {:?} and chan {:?} by {:?} to {:?}",
-            self.acard.borrow().card_name().unwrap(),
-            self.acard.borrow().chan_name().unwrap(),
-            (new_vol - old_vol),
-            new_vol
-        );
+        debug!("Decrease vol on card {:?} and chan {:?} by {:?} to {:?}",
+               self.acard
+                   .borrow()
+                   .card_name()
+                   .unwrap(),
+               self.acard
+                   .borrow()
+                   .chan_name()
+                   .unwrap(),
+               (new_vol - old_vol),
+               new_vol);
 
         self.set_vol(new_vol, user)?;
 
-        invoke_handlers(
-            &self.handlers.borrow(),
-            AudioSignal::ValuesChanged,
-            user,
-        );
+        invoke_handlers(&self.handlers.borrow(),
+                        AudioSignal::ValuesChanged,
+                        user);
         return Ok(());
     }
 
@@ -253,21 +266,25 @@ impl Audio {
         let mut rc = self.last_action_timestamp.borrow_mut();
         *rc = glib::get_monotonic_time();
 
-        debug!(
-            "Setting mute to {} on card {:?} and chan {:?} by user {:?}",
-            mute,
-            self.acard.borrow().card_name().unwrap(),
-            self.acard.borrow().chan_name().unwrap(),
-            user
-        );
+        debug!("Setting mute to {} on card {:?} and chan {:?} by user {:?}",
+               mute,
+               self.acard
+                   .borrow()
+                   .card_name()
+                   .unwrap(),
+               self.acard
+                   .borrow()
+                   .chan_name()
+                   .unwrap(),
+               user);
 
-        self.acard.borrow().set_mute(mute)?;
+        self.acard
+            .borrow()
+            .set_mute(mute)?;
 
-        invoke_handlers(
-            &self.handlers.borrow(),
-            AudioSignal::ValuesChanged,
-            user,
-        );
+        invoke_handlers(&self.handlers.borrow(),
+                        AudioSignal::ValuesChanged,
+                        user);
         return Ok(());
     }
 
@@ -284,16 +301,12 @@ impl Audio {
 }
 
 
-fn invoke_handlers(
-    handlers: &Vec<Box<Fn(AudioSignal, AudioUser)>>,
-    signal: AudioSignal,
-    user: AudioUser,
-) {
-    debug!(
-        "Invoking handlers for signal {:?} by user {:?}",
-        signal,
-        user
-    );
+fn invoke_handlers(handlers: &Vec<Box<Fn(AudioSignal, AudioUser)>>,
+                   signal: AudioSignal,
+                   user: AudioUser) {
+    debug!("Invoking handlers for signal {:?} by user {:?}",
+           signal,
+           user);
     for handler in handlers {
         let unboxed = handler.as_ref();
         unboxed(signal, user);
@@ -301,11 +314,9 @@ fn invoke_handlers(
 }
 
 
-fn on_alsa_event(
-    last_action_timestamp: &mut i64,
-    handlers: &Vec<Box<Fn(AudioSignal, AudioUser)>>,
-    alsa_event: AlsaEvent,
-) {
+fn on_alsa_event(last_action_timestamp: &mut i64,
+                 handlers: &Vec<Box<Fn(AudioSignal, AudioUser)>>,
+                 alsa_event: AlsaEvent) {
     let last: i64 = *last_action_timestamp;
 
     if last != 0 {
@@ -325,11 +336,9 @@ fn on_alsa_event(
         AlsaEvent::AlsaCardDiconnected => debug!("AlsaCardDiconnected"),
         AlsaEvent::AlsaCardValuesChanged => {
             debug!("AlsaCardValuesChanged");
-            invoke_handlers(
-                handlers,
-                self::AudioSignal::ValuesChanged,
-                self::AudioUser::Unknown,
-            );
+            invoke_handlers(handlers,
+                            self::AudioSignal::ValuesChanged,
+                            self::AudioUser::Unknown);
         }
         e => warn!("Unhandled alsa event: {:?}", e),
     }
diff --git a/src/prefs.rs b/src/prefs.rs
index f7c90d69a..2f4ef484b 100644
--- a/src/prefs.rs
+++ b/src/prefs.rs
@@ -16,13 +16,13 @@ const VOL_CONTROL_COMMANDS: [&str; 3] =
 
 
 
-#[derive(Deserialize, Debug, Serialize)]
-#[serde(tag = "action", rename_all = "snake_case")]
+#[derive(Deserialize, Debug, Serialize, Clone, Copy)]
+#[serde(rename_all = "snake_case")]
 pub enum MiddleClickAction {
     ToggleMute,
     ShowPreferences,
     VolumeControl,
-    CustomCommand { cmd: String },
+    CustomCommand,
 }
 
 impl Default for MiddleClickAction {
@@ -32,20 +32,46 @@ impl Default for MiddleClickAction {
 }
 
 
+impl From<i32> for MiddleClickAction {
+    fn from(i: i32) -> Self {
+        match i {
+            0 => MiddleClickAction::ToggleMute,
+            1 => MiddleClickAction::ShowPreferences,
+            2 => MiddleClickAction::VolumeControl,
+            3 => MiddleClickAction::CustomCommand,
+            _ => Default::default(),
+        }
+    }
+}
+
+
+impl Into<i32> for MiddleClickAction {
+    fn into(self) -> i32 {
+        match self {
+            MiddleClickAction::ToggleMute => 0,
+            MiddleClickAction::ShowPreferences => 1,
+            MiddleClickAction::VolumeControl => 2,
+            MiddleClickAction::CustomCommand => 3,
+        }
+    }
+}
+
+
+
 #[derive(Deserialize, Debug, Serialize)]
 #[serde(default)]
 pub struct DevicePrefs {
     pub card: String,
-    pub channel: String,
+    pub channel: String, 
     // TODO: normalize volume?
 }
 
 impl Default for DevicePrefs {
     fn default() -> DevicePrefs {
         return DevicePrefs {
-            card: String::from("(default)"),
-            channel: String::from("Master"),
-        };
+                   card: String::from("(default)"),
+                   channel: String::from("Master"),
+               };
     }
 }
 
@@ -54,20 +80,20 @@ impl Default for DevicePrefs {
 #[serde(default)]
 pub struct ViewPrefs {
     pub draw_vol_meter: bool,
-    pub vol_meter_offset: i64,
+    pub vol_meter_offset: i32,
     pub system_theme: bool,
-    pub vol_meter_color: VolColor,
+    pub vol_meter_color: VolColor, 
     // TODO: Display text folume/text volume pos?
 }
 
 impl Default for ViewPrefs {
     fn default() -> ViewPrefs {
         return ViewPrefs {
-            draw_vol_meter: true,
-            vol_meter_offset: 10,
-            system_theme: true,
-            vol_meter_color: VolColor::default(),
-        };
+                   draw_vol_meter: true,
+                   vol_meter_offset: 10,
+                   system_theme: true,
+                   vol_meter_color: VolColor::default(),
+               };
     }
 }
 
@@ -83,10 +109,10 @@ pub struct VolColor {
 impl Default for VolColor {
     fn default() -> VolColor {
         return VolColor {
-            red: 245,
-            green: 180,
-            blue: 0,
-        };
+                   red: 245,
+                   green: 180,
+                   blue: 0,
+               };
     }
 }
 
@@ -97,16 +123,17 @@ pub struct BehaviorPrefs {
     pub vol_control_cmd: Option<String>,
     pub vol_scroll_step: f64,
     pub middle_click_action: MiddleClickAction,
-    // TODO: fine scroll step?
+    pub custom_command: Option<String>, // TODO: fine scroll step?
 }
 
 impl Default for BehaviorPrefs {
     fn default() -> BehaviorPrefs {
         return BehaviorPrefs {
-            vol_control_cmd: None,
-            vol_scroll_step: 5.0,
-            middle_click_action: MiddleClickAction::default(),
-        };
+                   vol_control_cmd: None,
+                   vol_scroll_step: 5.0,
+                   middle_click_action: MiddleClickAction::default(),
+                   custom_command: None,
+               };
     }
 }
 
@@ -118,19 +145,19 @@ pub struct NotifyPrefs {
     pub notifcation_timeout: i64,
     pub notify_mouse_scroll: bool,
     pub notify_popup: bool,
-    pub notify_external: bool,
+    pub notify_external: bool, 
     // TODO: notify_hotkeys?
 }
 
 impl Default for NotifyPrefs {
     fn default() -> NotifyPrefs {
         return NotifyPrefs {
-            enable_notifications: true,
-            notifcation_timeout: 1500,
-            notify_mouse_scroll: true,
-            notify_popup: true,
-            notify_external: true,
-        };
+                   enable_notifications: true,
+                   notifcation_timeout: 1500,
+                   notify_mouse_scroll: true,
+                   notify_popup: true,
+                   notify_external: true,
+               };
     }
 }
 
@@ -141,7 +168,7 @@ pub struct Prefs {
     pub device_prefs: DevicePrefs,
     pub view_prefs: ViewPrefs,
     pub behavior_prefs: BehaviorPrefs,
-    pub notify_prefs: NotifyPrefs,
+    pub notify_prefs: NotifyPrefs, 
     // TODO: HotKeys?
 }
 
@@ -184,8 +211,8 @@ impl Prefs {
 
 
     pub fn store_config(&self) -> Result<()> {
-        let config_path =
-            get_xdg_dirs().place_config_file("pnmixer.toml").from_err()?;
+        let config_path = get_xdg_dirs().place_config_file("pnmixer.toml")
+            .from_err()?;
 
         debug!("Storing config in {:?}", config_path);
 
@@ -218,10 +245,9 @@ impl Prefs {
 }
 
 impl Display for Prefs {
-    fn fmt(
-        &self,
-        f: &mut Formatter,
-    ) -> std::result::Result<(), std::fmt::Error> {
+    fn fmt(&self,
+           f: &mut Formatter)
+           -> std::result::Result<(), std::fmt::Error> {
         let s = self.to_str();
         return write!(f, "{}", s);
     }
diff --git a/src/support_alsa.rs b/src/support_alsa.rs
index f2a64af38..2e2a40549 100644
--- a/src/support_alsa.rs
+++ b/src/support_alsa.rs
@@ -81,7 +81,9 @@ pub fn get_selem_names(mixer: &Mixer) -> Vec<String> {
 
 pub fn get_selem_by_name(mixer: &Mixer, name: String) -> Result<Selem> {
     for selem in get_selems(mixer) {
-        let n = selem.get_id().get_name().map(|y| String::from(y))?;
+        let n = selem.get_id()
+            .get_name()
+            .map(|y| String::from(y))?;
 
         if n == name {
             return Ok(selem);
diff --git a/src/support_ui.rs b/src/support_ui.rs
index 6d3c0cb5a..13a173be7 100644
--- a/src/support_ui.rs
+++ b/src/support_ui.rs
@@ -21,21 +21,18 @@ pub fn copy_pixbuf(pixbuf: &gdk_pixbuf::Pixbuf) -> gdk_pixbuf::Pixbuf {
 }
 
 
-pub fn pixbuf_new_from_theme(
-    icon_name: &str,
-    size: i32,
-    theme: &gtk::IconTheme,
-) -> Result<gdk_pixbuf::Pixbuf> {
+pub fn pixbuf_new_from_theme(icon_name: &str,
+                             size: i32,
+                             theme: &gtk::IconTheme)
+                             -> Result<gdk_pixbuf::Pixbuf> {
 
-    let icon_info = theme
-        .lookup_icon(icon_name, size, gtk::IconLookupFlags::empty())
-        .ok_or(format!("Couldn't find icon {}", icon_name))?;
+    let icon_info =
+        theme.lookup_icon(icon_name, size, gtk::IconLookupFlags::empty())
+            .ok_or(format!("Couldn't find icon {}", icon_name))?;
 
-    debug!(
-        "Loading stock icon {} from {:?}",
-        icon_name,
-        icon_info.get_filename().unwrap_or(PathBuf::new())
-    );
+    debug!("Loading stock icon {} from {:?}",
+           icon_name,
+           icon_info.get_filename().unwrap_or(PathBuf::new()));
 
     // TODO: propagate error
     let pixbuf = icon_info.load_icon().unwrap();
diff --git a/src/ui_entry.rs b/src/ui_entry.rs
index 7d398ff3b..65a60729c 100644
--- a/src/ui_entry.rs
+++ b/src/ui_entry.rs
@@ -1,25 +1,29 @@
 use app_state::*;
 use audio::*;
 use std::rc::Rc;
+use std::cell::RefCell;
 use ui_popup_menu::*;
 use ui_popup_window::*;
 use ui_tray_icon::*;
 use ui_prefs_dialog::*;
+use std::ptr;
+use gtk::ResponseType;
 
 
 
 pub fn init(appstate: Rc<AppS>) {
     {
-        let apps = appstate.clone();
-        appstate.audio.connect_handler(
-            Box::new(move |s, u| match (s, u) {
-                (AudioSignal::ValuesChanged, AudioUser::Unknown) => {
-                    debug!("External volume change!");
+        let mut apps = appstate.clone();
+        // appstate.audio.connect_handler(
+        // Box::new(move |s, u| match (s, u) {
+        // (AudioSignal::ValuesChanged, AudioUser::Unknown) => {
+        // debug!("External volume change!");
+
+        // }
+        // _ => debug!("Nix"),
+        // }),
+        // );
 
-                }
-                _ => debug!("Nix"),
-            }),
-        );
     }
 
     init_tray_icon(appstate.clone());
diff --git a/src/ui_popup_menu.rs b/src/ui_popup_menu.rs
index 494a94b36..f739c582f 100644
--- a/src/ui_popup_menu.rs
+++ b/src/ui_popup_menu.rs
@@ -14,15 +14,21 @@ pub fn init_popup_menu(appstate: Rc<AppS>) {
     /* about_item.connect_activate_link */
     {
         let apps = appstate.clone();
-        let about_item = &appstate.clone().gui.popup_menu.about_item;
-        about_item.connect_activate(
-            move |_| { on_about_item_activate(&apps); },
-        );
+        let about_item = &appstate.clone()
+                              .gui
+                              .popup_menu
+                              .about_item;
+        about_item.connect_activate(move |_| {
+                                        on_about_item_activate(&apps);
+                                    });
     }
 
     /* about_item.connect_activate_link */
     {
-        let prefs_item = &appstate.clone().gui.popup_menu.prefs_item;
+        let prefs_item = &appstate.clone()
+                              .gui
+                              .popup_menu
+                              .prefs_item;
         prefs_item.connect_activate(
             move |_| { on_prefs_item_activate(appstate.clone()); },
         );
diff --git a/src/ui_popup_window.rs b/src/ui_popup_window.rs
index f2664eb5a..a7f46cc22 100644
--- a/src/ui_popup_window.rs
+++ b/src/ui_popup_window.rs
@@ -18,25 +18,37 @@ pub fn init_popup_window(appstate: Rc<AppS>) {
     /* mute_check.connect_toggled */
     {
         let _appstate = appstate.clone();
-        let mute_check = &appstate.clone().gui.popup_window.mute_check;
-        toggle_signal = mute_check.connect_toggled(
-            move |_| on_mute_check_toggled(&_appstate),
-        );
+        let mute_check = &appstate.clone()
+                              .gui
+                              .popup_window
+                              .mute_check;
+        toggle_signal =
+            mute_check.connect_toggled(move |_| {
+                                           on_mute_check_toggled(&_appstate)
+                                       });
     }
 
     /* popup_window.connect_show */
     {
         let _appstate = appstate.clone();
-        let popup_window = &appstate.clone().gui.popup_window.popup_window;
-        popup_window.connect_show(
-            move |w| on_popup_window_show(w, &_appstate, toggle_signal),
-        );
+        let popup_window = &appstate.clone()
+                                .gui
+                                .popup_window
+                                .popup_window;
+        popup_window.connect_show(move |w| {
+                                      on_popup_window_show(w,
+                                                           &_appstate,
+                                                           toggle_signal)
+                                  });
     }
 
     /* vol_scale_adj.connect_value_changed */
     {
         let _appstate = appstate.clone();
-        let vol_scale_adj = &appstate.clone().gui.popup_window.vol_scale_adj;
+        let vol_scale_adj = &appstate.clone()
+                                 .gui
+                                 .popup_window
+                                 .vol_scale_adj;
         vol_scale_adj.connect_value_changed(
             move |_| on_vol_scale_value_changed(&_appstate),
         );
@@ -45,19 +57,20 @@ pub fn init_popup_window(appstate: Rc<AppS>) {
     /* popup_window.connect_event */
     {
         let _appstate = appstate.clone();
-        let popup_window = &appstate.clone().gui.popup_window.popup_window;
+        let popup_window = &appstate.clone()
+                                .gui
+                                .popup_window
+                                .popup_window;
         popup_window.connect_event(move |w, e| {
-            on_popup_window_event(w, e, &_appstate)
-        });
+                                       on_popup_window_event(w, e, &_appstate)
+                                   });
     }
 }
 
 
-fn on_popup_window_show(
-    window: &gtk::Window,
-    appstate: &AppS,
-    toggle_signal: u64,
-) {
+fn on_popup_window_show(window: &gtk::Window,
+                        appstate: &AppS,
+                        toggle_signal: u64) {
     let audio = &appstate.audio;
     let popup_window = &appstate.gui.popup_window;
 
@@ -72,11 +85,10 @@ fn on_popup_window_show(
 }
 
 
-fn on_popup_window_event(
-    w: &gtk::Window,
-    e: &gdk::Event,
-    appstate: &AppS,
-) -> gtk::Inhibit {
+fn on_popup_window_event(w: &gtk::Window,
+                         e: &gdk::Event,
+                         appstate: &AppS)
+                         -> gtk::Inhibit {
     match gdk::Event::get_event_type(e) {
         gdk::EventType::GrabBroken => w.hide(),
         gdk::EventType::KeyPress => {
@@ -108,7 +120,10 @@ fn on_popup_window_event(
 fn on_vol_scale_value_changed(appstate: &AppS) {
     let audio = &appstate.audio;
 
-    let val = appstate.gui.popup_window.vol_scale.get_value();
+    let val = appstate.gui
+        .popup_window
+        .vol_scale
+        .get_value();
 
     try_w!(audio.set_vol(val, AudioUser::Popup));
 }
@@ -120,11 +135,9 @@ fn on_mute_check_toggled(appstate: &AppS) {
 }
 
 
-pub fn update_mute_check(
-    appstate: &AppS,
-    toggle_signal: u64,
-    muted: Result<bool>,
-) {
+pub fn update_mute_check(appstate: &AppS,
+                         toggle_signal: u64,
+                         muted: Result<bool>) {
     let check_button = &appstate.gui.popup_window.mute_check;
 
     glib::signal_handler_block(check_button, toggle_signal);
@@ -157,40 +170,32 @@ fn grab_devices(window: &gtk::Window) -> Result<()> {
     let gdk_window = window.get_window().ok_or("No window?!")?;
 
     /* Grab the mouse */
-    let m_grab_status = device.grab(
-        &gdk_window,
-        GrabOwnership::None,
-        true,
-        BUTTON_PRESS_MASK,
-        None,
-        GDK_CURRENT_TIME as u32,
-    );
+    let m_grab_status =
+        device.grab(&gdk_window,
+                    GrabOwnership::None,
+                    true,
+                    BUTTON_PRESS_MASK,
+                    None,
+                    GDK_CURRENT_TIME as u32);
 
     if m_grab_status != GrabStatus::Success {
-        warn!(
-            "Could not grab {}",
-            device.get_name().unwrap_or(String::from("UNKNOWN DEVICE"))
-        );
+        warn!("Could not grab {}",
+              device.get_name().unwrap_or(String::from("UNKNOWN DEVICE")));
     }
 
     /* Grab the keyboard */
-    let k_dev = device.get_associated_device().ok_or(
-        "Couldn't get associated device",
-    )?;
+    let k_dev = device.get_associated_device()
+        .ok_or("Couldn't get associated device")?;
 
-    let k_grab_status = k_dev.grab(
-        &gdk_window,
-        GrabOwnership::None,
-        true,
-        KEY_PRESS_MASK,
-        None,
-        GDK_CURRENT_TIME as u32,
-    );
+    let k_grab_status = k_dev.grab(&gdk_window,
+                                   GrabOwnership::None,
+                                   true,
+                                   KEY_PRESS_MASK,
+                                   None,
+                                   GDK_CURRENT_TIME as u32);
     if k_grab_status != GrabStatus::Success {
-        warn!(
-            "Could not grab {}",
-            k_dev.get_name().unwrap_or(String::from("UNKNOWN DEVICE"))
-        );
+        warn!("Could not grab {}",
+              k_dev.get_name().unwrap_or(String::from("UNKNOWN DEVICE")));
     }
 
     return Ok(());
diff --git a/src/ui_prefs_dialog.rs b/src/ui_prefs_dialog.rs
index df9bf7b2f..e4d9d8bbd 100644
--- a/src/ui_prefs_dialog.rs
+++ b/src/ui_prefs_dialog.rs
@@ -4,56 +4,78 @@ use gtk::prelude::*;
 use gtk;
 use std::rc::Rc;
 use support_alsa::*;
+use gtk::ResponseType;
 
 
 
 // TODO: misbehavior when popup_window is open
 
 
-pub struct PrefsDialog {
-    pub prefs_dialog: gtk::Dialog,
-    pub card_combo: gtk::ComboBoxText,
-    pub chan_combo: gtk::ComboBoxText,
-    pub response_callback: Box<Fn(PrefsDialog, i64)>,
-}
-
-impl PrefsDialog {
-    pub fn new(
-        builder: gtk::Builder,
-        response_callback: Box<Fn(PrefsDialog, i64)>,
-    ) -> PrefsDialog {
-        return PrefsDialog {
-            prefs_dialog: builder.get_object("prefs_dialog").unwrap(),
-            card_combo: builder.get_object("card_combo").unwrap(),
-            chan_combo: builder.get_object("chan_combo").unwrap(),
-            response_callback,
-        };
-    }
-}
-
-
 
 pub fn show_prefs_dialog(appstate: Rc<AppS>) {
-    let prefs_dialog = Rc::new();
-    init_prefs_dialog(&appstate, &prefs_dialog);
+    if appstate.gui
+           .prefs_dialog
+           .borrow()
+           .is_some() {
+        return;
+    }
+
+    *appstate.gui.prefs_dialog.borrow_mut() = Some(PrefsDialog::new());
+    init_prefs_dialog(&appstate);
     {
+        let m_pd = appstate.gui.prefs_dialog.borrow();
+        let prefs_dialog = &m_pd.as_ref().unwrap();
         let prefs_dialog_w = &prefs_dialog.prefs_dialog;
+
+        prefs_dialog.from_prefs(&appstate.prefs.borrow());
+
         prefs_dialog_w.set_transient_for(&appstate.gui.popup_menu.menu_window);
+        // TODO: destruct PrefsDialog when clicking Ok/Apply
         prefs_dialog_w.present();
-        // prefs_dialog_w.destroy();
     }
 }
 
 
 /* TODO: do the references get dropped when the dialog window is gone? */
-pub fn init_prefs_dialog(appstate: &Rc<AppS>, prefs_dialog: &Rc<PrefsDialog>) {
+pub fn init_prefs_dialog(appstate: &Rc<AppS>) {
 
     /* prefs_dialog.connect_show */
     {
         let apps = appstate.clone();
-        let pd = prefs_dialog.clone();
-        prefs_dialog.clone().prefs_dialog.connect_show(move |_| {
-            on_prefs_dialog_show(&apps, &pd);
+        let m_pd = appstate.gui.prefs_dialog.borrow();
+        let pd = m_pd.as_ref().unwrap();
+        pd.prefs_dialog.connect_show(move |_| { on_prefs_dialog_show(&apps); });
+    }
+
+    /* prefs_dialog.connect_show */
+    {
+        let apps = appstate.clone();
+        let m_pd = appstate.gui.prefs_dialog.borrow();
+        let pd = m_pd.as_ref().unwrap();
+        pd.prefs_dialog.connect_response(move |_, response_id| {
+
+            let foo = 1;
+            if response_id == ResponseType::Ok.into() ||
+               response_id == ResponseType::Apply.into() {
+                let mut prefs = apps.prefs.borrow_mut();
+                let prefs_dialog = apps.gui.prefs_dialog.borrow();
+                *prefs = prefs_dialog.as_ref().unwrap().to_prefs();
+
+            }
+
+            if response_id != ResponseType::Apply.into() {
+                let mut prefs_dialog = apps.gui.prefs_dialog.borrow_mut();
+                prefs_dialog.as_ref().unwrap().prefs_dialog.destroy();
+                *prefs_dialog = None;
+            }
+
+            if response_id == ResponseType::Ok.into() ||
+               response_id == ResponseType::Apply.into() {
+                // TODO: update popup, tray_icon, hotkeys, notification and audio
+                let prefs = apps.prefs.borrow_mut();
+                try_w!(prefs.store_config());
+               }
+
         });
     }
 
@@ -62,36 +84,34 @@ pub fn init_prefs_dialog(appstate: &Rc<AppS>, prefs_dialog: &Rc<PrefsDialog>) {
     /* card_combo.connect_changed */
     {
         let apps = appstate.clone();
-        let card_combo = &prefs_dialog.card_combo;
-        let pd = prefs_dialog.clone();
+        let m_cc = appstate.gui.prefs_dialog.borrow();
+        let card_combo = &m_cc.as_ref().unwrap().card_combo;
 
         // TODO: refill channel combo
-        card_combo.connect_changed(
-            move |_| { on_card_combo_changed(&apps, &pd); },
-        );
+        card_combo.connect_changed(move |_| { on_card_combo_changed(&apps); });
     }
     /* card_combo.connect_changed */
     {
         let apps = appstate.clone();
-        let chan_combo = &prefs_dialog.chan_combo;
-        let pd = prefs_dialog.clone();
+        let m_cc = appstate.gui.prefs_dialog.borrow();
+        let chan_combo = &m_cc.as_ref().unwrap().chan_combo;
 
-        chan_combo.connect_changed(
-            move |_| { on_chan_combo_changed(&apps, &pd); },
-        );
+        chan_combo.connect_changed(move |_| { on_chan_combo_changed(&apps); });
     }
 }
 
 
-fn on_prefs_dialog_show(appstate: &AppS, prefs_dialog: &PrefsDialog) {
-    let card_combo = &prefs_dialog.card_combo;
-    let chan_combo = &prefs_dialog.chan_combo;
+fn on_prefs_dialog_show(appstate: &AppS) {
+    let m_cc = appstate.gui.prefs_dialog.borrow();
+    let card_combo = &m_cc.as_ref().unwrap().card_combo;
+    let m_cc = appstate.gui.prefs_dialog.borrow();
+    let chan_combo = &m_cc.as_ref().unwrap().chan_combo;
     let acard = appstate.audio.acard.borrow();
 
 
     /* set card combo */
-    let cur_card_name =
-        try_w!(acard.card_name(), "Can't get current card name!");
+    let cur_card_name = try_w!(acard.card_name(),
+                               "Can't get current card name!");
     let available_card_names = get_alsa_card_names();
 
     /* set_active_id doesn't work, so save the index */
@@ -129,12 +149,13 @@ fn on_prefs_dialog_show(appstate: &AppS, prefs_dialog: &PrefsDialog) {
 }
 
 
-fn on_card_combo_changed(appstate: &AppS, prefs_dialog: &PrefsDialog) {
-    let card_combo = &prefs_dialog.card_combo;
-    let chan_combo = &prefs_dialog.chan_combo;
-    let active_card_item = try_w!(card_combo.get_active_text().ok_or(
-        "No active Card item found",
-    ));
+fn on_card_combo_changed(appstate: &AppS) {
+    let m_cc = appstate.gui.prefs_dialog.borrow();
+    let card_combo = &m_cc.as_ref().unwrap().card_combo;
+    let m_cc = appstate.gui.prefs_dialog.borrow();
+    let chan_combo = &m_cc.as_ref().unwrap().chan_combo;
+    let active_card_item =
+        try_w!(card_combo.get_active_text().ok_or("No active Card item found"));
     let active_chan_item = chan_combo.get_active_id();
     let cur_card_name = {
         let acard = appstate.audio.acard.borrow();
@@ -142,21 +163,20 @@ fn on_card_combo_changed(appstate: &AppS, prefs_dialog: &PrefsDialog) {
     };
 
     if active_card_item != cur_card_name {
-        appstate.audio.switch_acard(
-            Some(cur_card_name),
-            active_chan_item,
-            AudioUser::PrefsWindow,
-        );
+        appstate.audio.switch_acard(Some(cur_card_name),
+                                    active_chan_item,
+                                    AudioUser::PrefsWindow);
     }
 }
 
 
-fn on_chan_combo_changed(appstate: &AppS, prefs_dialog: &PrefsDialog) {
-    let card_combo = &prefs_dialog.card_combo;
-    let chan_combo = &prefs_dialog.chan_combo;
-    let active_chan_item = try_w!(chan_combo.get_active_text().ok_or(
-        "No active Chan item found",
-    ));
+fn on_chan_combo_changed(appstate: &AppS) {
+    let m_cc = appstate.gui.prefs_dialog.borrow();
+    let card_combo = &m_cc.as_ref().unwrap().card_combo;
+    let m_cc = appstate.gui.prefs_dialog.borrow();
+    let chan_combo = &m_cc.as_ref().unwrap().chan_combo;
+    let active_chan_item =
+        try_w!(chan_combo.get_active_text().ok_or("No active Chan item found"));
     let cur_card_name = {
         let acard = appstate.audio.acard.borrow();
         acard.card_name().ok()
@@ -167,10 +187,11 @@ fn on_chan_combo_changed(appstate: &AppS, prefs_dialog: &PrefsDialog) {
     };
 
     if active_chan_item != cur_chan_name {
-        appstate.audio.switch_acard(
-            cur_card_name,
-            Some(active_chan_item),
-            AudioUser::PrefsWindow,
-        );
+        appstate.audio.switch_acard(cur_card_name,
+                                    Some(active_chan_item),
+                                    AudioUser::PrefsWindow);
     }
 }
+
+
+fn prefs_dialog_to_prefs(prefs_dialog: &PrefsDialog) {}
diff --git a/src/ui_tray_icon.rs b/src/ui_tray_icon.rs
index 4f20e8c1a..69402c676 100644
--- a/src/ui_tray_icon.rs
+++ b/src/ui_tray_icon.rs
@@ -43,19 +43,18 @@ impl TrayIcon {
         let status_icon = gtk::StatusIcon::new();
 
         return Ok(TrayIcon {
-            volmeter,
-            audio_pix: RefCell::new(audio_pix),
-            status_icon,
-            icon_size: Cell::new(ICON_MIN_SIZE),
-        });
+                      volmeter,
+                      audio_pix: RefCell::new(audio_pix),
+                      status_icon,
+                      icon_size: Cell::new(ICON_MIN_SIZE),
+                  });
     }
 
-    fn update(
-        &self,
-        prefs: &Prefs,
-        audio: &Audio,
-        m_size: Option<i32>,
-    ) -> Result<()> {
+    fn update(&self,
+              prefs: &Prefs,
+              audio: &Audio,
+              m_size: Option<i32>)
+              -> Result<()> {
         match m_size {
             Some(s) => {
                 if s < ICON_MIN_SIZE {
@@ -105,37 +104,30 @@ pub struct VolMeter {
 impl VolMeter {
     pub fn new(prefs: &Prefs) -> VolMeter {
         return VolMeter {
-            red: prefs.view_prefs.vol_meter_color.red,
-            green: prefs.view_prefs.vol_meter_color.green,
-            blue: prefs.view_prefs.vol_meter_color.blue,
-            x_offset_pct: prefs.view_prefs.vol_meter_offset,
-            y_offset_pct: 10,
-            /* dynamic */
-            width: Cell::new(0),
-            row: RefCell::new(vec![]),
-        };
+                   red: prefs.view_prefs.vol_meter_color.red,
+                   green: prefs.view_prefs.vol_meter_color.green,
+                   blue: prefs.view_prefs.vol_meter_color.blue,
+                   x_offset_pct: prefs.view_prefs.vol_meter_offset as i64,
+                   y_offset_pct: 10,
+                   /* dynamic */
+                   width: Cell::new(0),
+                   row: RefCell::new(vec![]),
+               };
     }
 
     // TODO: cache input pixbuf?
-    fn meter_draw(
-        &self,
-        volume: i64,
-        pixbuf: &gdk_pixbuf::Pixbuf,
-    ) -> Result<gdk_pixbuf::Pixbuf> {
+    fn meter_draw(&self,
+                  volume: i64,
+                  pixbuf: &gdk_pixbuf::Pixbuf)
+                  -> Result<gdk_pixbuf::Pixbuf> {
 
-        ensure!(
-            pixbuf.get_colorspace() == GDK_COLORSPACE_RGB,
-            "Invalid colorspace in pixbuf"
-        );
-        ensure!(
-            pixbuf.get_bits_per_sample() == 8,
-            "Invalid bits per sample in pixbuf"
-        );
+        ensure!(pixbuf.get_colorspace() == GDK_COLORSPACE_RGB,
+                "Invalid colorspace in pixbuf");
+        ensure!(pixbuf.get_bits_per_sample() == 8,
+                "Invalid bits per sample in pixbuf");
         ensure!(pixbuf.get_has_alpha(), "No alpha channel in pixbuf");
-        ensure!(
-            pixbuf.get_n_channels() == 4,
-            "Invalid number of channels in pixbuf"
-        );
+        ensure!(pixbuf.get_n_channels() == 4,
+                "Invalid number of channels in pixbuf");
 
         let i_width = pixbuf.get_width() as i64;
         let i_height = pixbuf.get_height() as i64;
@@ -144,21 +136,16 @@ impl VolMeter {
 
         let vm_width = i_width / 6;
         let x = (self.x_offset_pct as f64 *
-                     ((i_width - vm_width) as f64 / 100.0)) as
-            i64;
-        ensure!(
-            x >= 0 && (x + vm_width) <= i_width,
-            "x coordinate invalid: {}",
-            x
-        );
+                 ((i_width - vm_width) as f64 / 100.0)) as i64;
+        ensure!(x >= 0 && (x + vm_width) <= i_width,
+                "x coordinate invalid: {}",
+                x);
         let y = (self.y_offset_pct as f64 * (i_height as f64 / 100.0)) as i64;
         let vm_height =
             ((i_height - (y * 2)) as f64 * (volume as f64 / 100.0)) as i64;
-        ensure!(
-            y >= 0 && (y + vm_height) <= i_height,
-            "y coordinate invalid: {}",
-            y
-        );
+        ensure!(y >= 0 && (y + vm_height) <= i_height,
+                "y coordinate invalid: {}",
+                y);
 
         /* Let's check if the icon width changed, in which case we
          * must reinit our internal row of pixels.
@@ -194,9 +181,8 @@ impl VolMeter {
                 let p_index = ((row_offset * rowstride) + col_offset) as usize;
 
                 let row = self.row.borrow();
-                pixels[p_index..p_index + row.len()].copy_from_slice(
-                    row.as_ref(),
-                );
+                pixels[p_index..p_index + row.len()]
+                    .copy_from_slice(row.as_ref());
 
             }
         }
@@ -319,14 +305,10 @@ pub fn init_tray_icon(appstate: Rc<AppS>) {
     {
         let apps = appstate.clone();
         tray_icon.status_icon.connect_size_changed(move |_, size| {
-            try_wr!(
-                apps.gui.tray_icon.update(
-                    &apps.prefs.borrow_mut(),
-                    &apps.audio,
-                    Some(size),
-                ),
-                false
-            );
+            try_wr!(apps.gui.tray_icon.update(&apps.prefs.borrow_mut(),
+                                              &apps.audio,
+                                              Some(size)),
+                    false);
             return false;
         });
     }
@@ -334,9 +316,9 @@ pub fn init_tray_icon(appstate: Rc<AppS>) {
     /* tray_icon.connect_activate */
     {
         let apps = appstate.clone();
-        tray_icon.status_icon.connect_activate(
-            move |_| on_tray_icon_activate(&apps),
-        );
+        tray_icon.status_icon.connect_activate(move |_| {
+                                                   on_tray_icon_activate(&apps)
+                                               });
     }
 
     /* tray_icon.connect_scroll_event */
@@ -385,10 +367,9 @@ fn on_tray_icon_popup_menu(appstate: &AppS) {
 }
 
 
-fn on_tray_icon_scroll_event(
-    appstate: &AppS,
-    event: &gdk::EventScroll,
-) -> bool {
+fn on_tray_icon_scroll_event(appstate: &AppS,
+                             event: &gdk::EventScroll)
+                             -> bool {
 
     let scroll_dir: gdk::ScrollDirection = event.get_direction();
     match scroll_dir {
@@ -405,10 +386,9 @@ fn on_tray_icon_scroll_event(
 }
 
 
-fn on_tray_button_release_event(
-    appstate: &AppS,
-    event_button: &gdk::EventButton,
-) -> bool {
+fn on_tray_button_release_event(appstate: &AppS,
+                                event_button: &gdk::EventButton)
+                                -> bool {
     let button = event_button.get_button();
 
     if button != 2 {