From d31be181a2c69c167bb61dbb9f1007f346920ac8 Mon Sep 17 00:00:00 2001
From: Lars Uebernickel <lars.uebernickel@canonical.com>
Date: Tue, 1 Oct 2013 14:11:04 +0200
Subject: Show synchronous notification when changing the volume by scrolling
 over the indicator

---
 CMakeLists.txt     |  1 +
 debian/control     |  1 +
 src/CMakeLists.txt |  1 +
 src/main.vala      |  2 ++
 src/service.vala   | 30 ++++++++++++++++++++++++++++++
 5 files changed, 35 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6ab96c9..c60dc97 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -41,6 +41,7 @@ pkg_check_modules(
   gio-2.0>=${GIO_2_0_REQUIRED_VERSION}
   gio-unix-2.0
   libxml-2.0
+  libnotify
 )
 include_directories(${SOUNDSERVICE_INCLUDE_DIRS})
 
diff --git a/debian/control b/debian/control
index 0d1da18..ff4c041 100644
--- a/debian/control
+++ b/debian/control
@@ -13,6 +13,7 @@ Build-Depends: debhelper (>= 9.0),
                liburl-dispatcher1-dev,
                libpulse-dev (>= 0.9.18),
                libpulse-mainloop-glib0 (>= 0.9.18),
+               libnotify-dev,
                libgee-dev,
                libxml2-dev,
 Standards-Version: 3.9.4
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index a61fb72..572befd 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -14,6 +14,7 @@ vala_init(indicator-sound-service
     libxml-2.0
     libpulse
     libpulse-mainloop-glib
+    libnotify
   OPTIONS
     --ccode
     --thread
diff --git a/src/main.vala b/src/main.vala
index 97f311f..4da9e58 100644
--- a/src/main.vala
+++ b/src/main.vala
@@ -7,6 +7,8 @@ static int main (string[] args) {
 	Intl.setlocale (LocaleCategory.ALL, "");
 	Intl.bindtextdomain (Config.GETTEXT_PACKAGE, Config.GNOMELOCALEDIR);
 
+	Notify.init ("indicator-sound");
+
 	var service = new IndicatorSound.Service ();
 	return service.run ();
 }
diff --git a/src/service.vala b/src/service.vala
index 9041097..0d028ac 100644
--- a/src/service.vala
+++ b/src/service.vala
@@ -45,6 +45,14 @@ public class IndicatorSound.Service {
 		this.settings.changed["interested-media-players"].connect ( () => {
 			this.players.sync (settings.get_strv ("interested-media-players"));
 		});
+
+		if (settings.get_boolean ("show-notify-osd-on-scroll")) {
+			unowned List<string> caps = Notify.get_server_caps ();
+			if (caps.find_custom ("x-canonical-private-synchronous", strcmp) != null) {
+				this.notification = new Notify.Notification ("indicator-sound", "", "");
+				this.notification.set_hint_string ("x-canonical-private-synchronous", "indicator-sound");
+			}
+		}
 	}
 
 	public int run () {
@@ -76,6 +84,7 @@ public class IndicatorSound.Service {
 	VolumeControl volume_control;
 	MediaPlayerList players;
 	uint player_action_update_id;
+	Notify.Notification notification;
 
 	void activate_scroll_action (SimpleAction action, Variant? param) {
 		const double volume_step_percentage = 0.06;
@@ -83,6 +92,27 @@ public class IndicatorSound.Service {
 
 		double v = this.volume_control.get_volume () + volume_step_percentage * delta;
 		this.volume_control.set_volume (v.clamp (0.0, 1.0));
+
+		if (this.notification != null) {
+			string icon;
+			if (v <= 0.0)
+				icon = "notification-audio-volume-off";
+			else if (v <= 0.3)
+				icon = "notification-audio-volume-low";
+			else if (v <= 0.7)
+				icon = "notification-audio-volume-medium";
+			else
+				icon = "notification-audio-volume-high";
+
+			this.notification.update ("indicator-sound", "", icon);
+			this.notification.set_hint_int32 ("value", ((int32) (100 * v)).clamp (-1, 101));
+			try {
+				this.notification.show ();
+			}
+			catch (Error e) {
+				warning ("unable to show notification: %s", e.message);
+			}
+		}
 	}
 
 	void activate_desktop_settings (SimpleAction action, Variant? param) {
-- 
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