Use thread for fading

app/musicmuster.py

@@ -2,6 +2,7 @@
 
 import vlc
 import sys
+import threading
 
 from datetime import datetime, timedelta
 from log import DEBUG, ERROR
@@ -15,6 +16,7 @@ from ui.dlg_search_database_ui import Ui_Dialog
 
 from config import Config
 from model import Playdates, Playlists, Settings, Tracks
+from time import sleep
 
 
 class Music:
@@ -98,6 +100,20 @@ class Music:
         except AttributeError:
             return ""
 
+    def fade_current(self):
+        thread = threading.Thread(target=self._fade_current)
+        thread.start()
+
+    def _fade_current(self):
+        player = self.current_track['player']
+        position = player.get_position()
+        for i in range(100, 0, -10):
+            player.audio_set_volume(i)
+            sleep(0.2)
+        player.pause()
+        player.audio_set_volume(100)
+        player.set_position(position)
+
     def play_next(self):
         if self.previous_track['player']:
             self.previous_track['player'].release()
@@ -190,9 +206,10 @@ class Window(QMainWindow, Ui_MainWindow):
             record.update({'f_int': self.y()})
 
     def connectSignalsSlots(self):
-        self.actionSearch_database.triggered.connect(self.selectFromDatabase)
-        self.actionPlay_selected.triggered.connect(self.play_next)
+        self.actionFade.triggered.connect(self.fade)
         self.actionPlay_next.triggered.connect(self.play_next)
+        self.actionPlay_selected.triggered.connect(self.play_next)
+        self.actionSearch_database.triggered.connect(self.selectFromDatabase)
         self.playlist.itemSelectionChanged.connect(self.set_next_track)
         self.timer.timeout.connect(self.tick)
 
@@ -200,6 +217,9 @@ class Window(QMainWindow, Ui_MainWindow):
         dlg = DbDialog(self)
         dlg.exec()
 
+    def fade(self):
+        self.music.fade_current()
+
     def play_next(self):
         self.music.play_next()
         self.current_track.setText(

app/ui/main_window.ui

@@ -596,7 +596,7 @@ border: 1px solid rgb(85, 87, 83);</string>
     <addaction name="actionSearch_database"/>
     <addaction name="actionAdd_file"/>
     <addaction name="separator"/>
-    <addaction name="actionF_ade"/>
+    <addaction name="actionFade"/>
     <addaction name="actionS_top"/>
    </widget>
    <addaction name="menuFile"/>
@@ -622,7 +622,7 @@ border: 1px solid rgb(85, 87, 83);</string>
    </attribute>
    <addaction name="actionPlay_selected"/>
    <addaction name="actionPlay_next"/>
-   <addaction name="actionF_ade"/>
+   <addaction name="actionFade"/>
    <addaction name="separator"/>
    <addaction name="actionAdd_file"/>
    <addaction name="actionSearch_database"/>
@@ -679,7 +679,7 @@ border: 1px solid rgb(85, 87, 83);</string>
     <string>Add &amp;file</string>
    </property>
   </action>
-  <action name="actionF_ade">
+  <action name="actionFade">
    <property name="icon">
     <iconset>
      <normaloff>icon-fade.png</normaloff>icon-fade.png</iconset>