buncha changes

src/application.vala

@@ -28,9 +28,6 @@ public class Wavelet.Application : Adw.Application {
             flags: ApplicationFlags.DEFAULT_FLAGS
         );
 
-        playbin = Gst.ElementFactory.make ("playbin3", null);
-        assert (playbin != null);
-
         var app_config_dir = Path.build_filename (Environment.get_user_config_dir (), "wavelet");
         try {
             File.new_build_filename (app_config_dir).make_directory_with_parents ();
@@ -89,12 +86,66 @@ public class Wavelet.Application : Adw.Application {
             });
 
             win.play_queue.play_now.connect ((song) => {
+                win.play_position.sensitive = false;
+
                 playbin.set_state (Gst.State.READY);
                 playbin.set ("uri", api.stream_uri (song.id));
                 playbin.set_state (Gst.State.PLAYING);
             });
         });
         win.setup.load (config_db);
+
+        playbin = Gst.ElementFactory.make ("playbin3", null);
+        assert (playbin != null);
+
+        win.notify["volume"].connect ((s, p) => {
+            // gst docs: Volume sliders should usually use a cubic volume.
+            ((Gst.Audio.StreamVolume) playbin).set_volume (Gst.Audio.StreamVolumeFormat.CUBIC, win.volume);
+        });
+
+        win.mute.clicked.connect (() => {
+            var vol = (Gst.Audio.StreamVolume) playbin;
+            if (vol.get_mute ()) {
+                win.show_unmute ();
+                vol.set_mute (false);
+            } else {
+                win.show_mute ();
+                vol.set_mute (true);
+            }
+        });
+
+        Timeout.add (100, () => {
+            int64 position_ns;
+            if (playbin.query_position (Gst.Format.TIME, out position_ns)) {
+                win.play_position_ms = position_ns / 1000000;
+            }
+            return Source.CONTINUE;
+        });
+
+        playbin.get_bus ().add_watch (Priority.DEFAULT, (bus, message) => {
+            switch (message.type) {
+            case Gst.MessageType.ASYNC_DONE:
+                win.play_position.sensitive = true;
+
+                int64 duration_ns;
+                assert(playbin.query_duration (Gst.Format.TIME, out duration_ns));
+                print("%lld\n", duration_ns);
+
+                win.play_position_ms = 0;
+                win.play_duration_ms = duration_ns / 1000000;
+
+                break;
+
+            default:
+                print ("%s\n", message.type.to_string ());
+                break;
+            }
+            return true;
+        });
+
+        Signal.connect (playbin, "about-to-finish", () => {
+            print("about to finish\n");
+        }, null);
     }
 
     private void on_about_action () {

src/meson.build

@@ -12,6 +12,7 @@ wavelet_sources = [
 wavelet_deps = [
   config_dep,
   dependency('gstreamer-1.0'),
+  dependency('gstreamer-audio-1.0'),
   dependency('gtk4'),
   dependency('json-glib-1.0'),
   dependency('libadwaita-1', version: '>= 1.4'),

src/play_queue.vala

@@ -29,10 +29,12 @@ public class Wavelet.PlayQueue : Adw.NavigationPage {
 
     construct {
         this.songs = new ListStore (typeof (Song));
-        this.list_view.model = new Gtk.NoSelection (this.songs);
+        this.current = 0;
 
+        this.list_view.model = new Gtk.NoSelection (this.songs);
         this.list_view.activate.connect ((position) => {
-            Song song = (Song) this.songs.get_item(position);
+            this.current = position;
+            Song song = (Song) this.songs.get_item (position);
             this.play_now (song);
         });
     }
@@ -45,4 +47,13 @@ public class Wavelet.PlayQueue : Adw.NavigationPage {
     public void queue (Song song) {
         this.songs.append (song);
     }
+
+    public Song? next () {
+        if (this.current >= this.songs.get_n_items ()) {
+            return null;
+        } else {
+            this.current += 1;
+            return (Song) this.songs.get_item (this.current);
+        }
+    }
 }

src/window.blp

@@ -126,23 +126,32 @@ template $WaveletWindow: Adw.ApplicationWindow {
           halign: start;
           orientation: horizontal;
 
-          Label {
+          Label play_position_label {
+            styles [
+              "numeric",
+            ]
+
             label: "00:00";
           }
 
-          Scale {
+          Scale play_position {
             orientation: horizontal;
             width-request: 200;
+            sensitive: false;
 
             adjustment: Adjustment {
               lower: 0;
-              upper: 100;
-              value: 0;
+              value: bind template.play_position_ms bidirectional;
+              upper: bind template.play_duration_ms;
             };
           }
 
-          Label {
-            label: "99:99";
+          Label play_duration {
+            styles [
+              "numeric",
+            ]
+
+            label: "00:00";
           }
         }
       }
@@ -175,7 +184,7 @@ template $WaveletWindow: Adw.ApplicationWindow {
         valign: center;
       }
 
-      Button {
+      Button mute {
         icon-name: "audio-volume-high";
         valign: center;
       }
@@ -185,16 +194,11 @@ template $WaveletWindow: Adw.ApplicationWindow {
         width-request: 130;
 
         adjustment: Adjustment {
-          lower: 0;
-          upper: 100;
-          value: 100;
+          lower: 0.0;
+          value: bind template.volume bidirectional;
+          upper: 1.0;
         };
       }
-
-      Button {
-        icon-name: "media-playlist-consecutive";
-        valign: center;
-      }
     }
   };
 }

src/window.vala

@@ -31,11 +31,30 @@ public class Wavelet.Window : Adw.ApplicationWindow {
     [GtkChild] public unowned Wavelet.PlayQueue play_queue;
     [GtkChild] public unowned Adw.ButtonRow shuffle_all_tracks;
 
+    [GtkChild] public unowned Gtk.Button mute;
+    [GtkChild] private unowned Gtk.Label play_position_label;
+    [GtkChild] public unowned Gtk.Scale play_position;
+    [GtkChild] private unowned Gtk.Label play_duration;
+
+    public int64 play_position_ms { get; set; default = 0; }
+    public int64 play_duration_ms { get; set; default = 1; }
+
+    public double volume { get; set; default = 1.0; }
+
     public Window (Gtk.Application app) {
         Object (application: app);
     }
 
     construct {
+        this.notify["play-position-ms"].connect ((s, p) => {
+            int seconds = (int)(this.play_position_ms/1000);
+            this.play_position_label.label = "%02d:%02d".printf(seconds/60, seconds%60);
+        });
+        this.notify["play-duration-ms"].connect ((s, p) => {
+            int seconds = (int)(this.play_duration_ms/1000);
+            this.play_duration.label = "%02d:%02d".printf(seconds/60, seconds%60);
+        });
+
         this.sidebar.row_activated.connect ((row) => {
             if (row == this.sidebar_setup) {
                 this.stack.set_visible_child_name("setup");
@@ -46,4 +65,12 @@ public class Wavelet.Window : Adw.ApplicationWindow {
 
         this.sidebar.select_row (this.sidebar.get_row_at_index (0));
     }
+
+    public void show_mute () {
+        this.mute.icon_name = "audio-volume-muted";
+    }
+
+    public void show_unmute () {
+        this.mute.icon_name = "audio-volume-high";
+    }
 }