Added volume fade graph.

app/config.py

@@ -48,6 +48,9 @@ class Config(object):
     DISPLAY_SQL = False
     ERRORS_FROM = ['noreply@midnighthax.com']
     ERRORS_TO = ['kae@midnighthax.com']
+    FADE_CURVE_BACKGROUND = "lightyellow"
+    FADE_CURVE_FOREGROUND = "blue"
+    FADE_CURVE_MS_BEFORE_FADE = 5000
     FADE_STEPS = 20
     FADE_TIME = 3000
     HIDE_AFTER_PLAYING_OFFSET = 5000
@@ -77,7 +80,7 @@ class Config(object):
     SCROLL_TOP_MARGIN = 3
     TEXT_NO_TRACK_NO_NOTE = "[Section header]"
     TOD_TIME_FORMAT = "%H:%M:%S"
-    TIMER_MS = 500
+    TIMER_MS = 100
     TRACK_TIME_FORMAT = "%H:%M:%S"
     VOLUME_VLC_DEFAULT = 75
     VOLUME_VLC_DROP3db = 65

app/helpers.py

@@ -1,3 +1,4 @@
+import numpy as np
 import os
 import psutil
 import shutil

app/musicmuster.py

@@ -3,17 +3,17 @@
 from log import log
 from os.path import basename
 import argparse
-import matplotlib                           # type: ignore
 import os
+import numpy as np
+import pyqtgraph as pg                      # type: ignore
 import stackprinter                         # type: ignore
 import subprocess
 import sys
 import threading
 
+import icons_rc
 from datetime import datetime, timedelta
 from pygame import mixer
-from matplotlib.backends.backend_qtagg import FigureCanvasQTAgg  # type: ignore
-from matplotlib.figure import Figure                            # type: ignore
 from time import sleep
 from typing import (
     Callable,
@@ -143,78 +143,63 @@ class CartButton(QPushButton):
         self.pgb.setGeometry(0, 0, self.width(), 10)
 
 
-class PlaylistTrack:
-    """
-    Used to provide a single reference point for specific playlist tracks,
-    typically the previous, current and next track.
-    """
+class FadeCurve:
+    GraphWidget = None
 
-    def __init__(self) -> None:
+    def __init__(self, track):
         """
-        Only initialises data structure. Call set_plr to populate.
-
-        Do NOT store row_number here - that changes if tracks are reordered
-        in playlist (add, remove, drag/drop) and we shouldn't care about row
-        number: that's the playlist's problem.
+        Set up fade graph array
         """
 
-        self.artist: Optional[str] = None
-        self.duration: Optional[int] = None
-        self.end_time: Optional[datetime] = None
-        self.fade_at: Optional[int] = None
-        self.fade_length: Optional[int] = None
-        self.path: Optional[str] = None
-        self.playlist_id: Optional[int] = None
-        self.playlist_tab: Optional[PlaylistTab] = None
-        self.plr_id: Optional[int] = None
-        self.silence_at: Optional[int] = None
-        self.start_gap: Optional[int] = None
-        self.start_time: Optional[datetime] = None
-        self.title: Optional[str] = None
-        self.track_id: Optional[int] = None
+        audio = helpers.get_audio_segment(track.path)
+        if not audio:
+            return None
 
-    def __repr__(self) -> str:
-        return (
-            f"<PlaylistTrack(title={self.title}, artist={self.artist}, "
-            f"playlist_id={self.playlist_id}>"
+        # Start point of curve is Config.FADE_CURVE_MS_BEFORE_FADE
+        # milliseconds before fade starts to silence
+        self.start_ms = max(
+            0, track.fade_at - Config.FADE_CURVE_MS_BEFORE_FADE - 1)
+        self.end_ms = track.silence_at
+        self.audio_segment = audio[self.start_ms:self.end_ms]
+        self.graph_array = np.array(self.audio_segment.get_array_of_samples())
+
+        # Calculate the factor to map milliseconds of track to array
+        self.ms_to_array_factor = (
+            len(self.graph_array) / (self.end_ms - self.start_ms)
         )
 
-    def set_plr(self, session: scoped_session, plr: PlaylistRows,
-                tab: PlaylistTab) -> None:
-        """
-        Update with new plr information
-        """
+        self.region = None
 
-        self.playlist_tab = tab
+    def clear(self) -> None:
+        """Clear the current graph"""
 
-        session.add(plr)
-        track = plr.track
+        if self.GraphWidget:
+            self.GraphWidget.clear()
 
-        self.artist = track.artist
-        self.duration = track.duration
-        self.end_time = None
-        self.fade_at = track.fade_at
-        self.path = track.path
-        self.playlist_id = plr.playlist_id
-        self.plr_id = plr.id
-        self.silence_at = track.silence_at
-        self.start_gap = track.start_gap
-        self.start_time = None
-        self.title = track.title
-        self.track_id = track.id
+    def plot(self):
+        self.curve = self.GraphWidget.plot(self.graph_array)
+        self.curve.setPen(Config.FADE_CURVE_FOREGROUND)
 
-        if track.silence_at and track.fade_at:
-            self.fade_length = track.silence_at - track.fade_at
+    def tick(self, play_position) -> None:
+        """Update volume fade curve"""
 
-    def start(self) -> None:
-        """
-        Called when track starts playing
-        """
+        if not self.GraphWidget:
+            return
 
-        self.start_time = datetime.now()
-        if self.duration:
-            self.end_time = (
-                self.start_time + timedelta(milliseconds=self.duration))
+        ms_of_graph = play_position - self.start_ms
+        if ms_of_graph < 0:
+            return
+
+        if self.region is None:
+            # Create the region now that we're into fade
+            self.region = pg.LinearRegionItem(
+                [0, 0],
+                bounds=[0, len(self.graph_array)]
+            )
+            self.GraphWidget.addItem(self.region)
+
+        # Update region position
+        self.region.setRegion([0, ms_of_graph * self.ms_to_array_factor])
 
 
 class ImportTrack(QObject):
@@ -253,17 +238,6 @@ class ImportTrack(QObject):
             self.finished.emit(self.playlist)
 
 
-class MplCanvas(FigureCanvasQTAgg):
-    """
-    From https://www.pythonguis.com/tutorials/plotting-matplotlib/
-    """
-
-    def __init__(self, parent=None, width=5, height=4, dpi=100):
-        fig = Figure(figsize=(width, height), dpi=dpi)
-        # self.axes = fig.add_subplot(111)
-        super(MplCanvas, self).__init__(fig)
-
-
 class MusicMusterSignals(QObject):
     """
     Class for all MusicMuster signals. See:
@@ -275,6 +249,84 @@ class MusicMusterSignals(QObject):
     set_next_track_signal = pyqtSignal(int, int)
 
 
+class PlaylistTrack:
+    """
+    Used to provide a single reference point for specific playlist tracks,
+    typically the previous, current and next track.
+    """
+
+    def __init__(self) -> None:
+        """
+        Only initialises data structure. Call set_plr to populate.
+
+        Do NOT store row_number here - that changes if tracks are reordered
+        in playlist (add, remove, drag/drop) and we shouldn't care about row
+        number: that's the playlist's problem.
+        """
+
+        self.artist: Optional[str] = None
+        self.duration: Optional[int] = None
+        self.end_time: Optional[datetime] = None
+        self.fade_at: Optional[int] = None
+        self.fade_curve: Optional[FadeCurve] = None
+        self.fade_length: Optional[int] = None
+        self.path: Optional[str] = None
+        self.playlist_id: Optional[int] = None
+        self.playlist_tab: Optional[PlaylistTab] = None
+        self.plr_id: Optional[int] = None
+        self.silence_at: Optional[int] = None
+        self.start_gap: Optional[int] = None
+        self.start_time: Optional[datetime] = None
+        self.title: Optional[str] = None
+        self.track_id: Optional[int] = None
+
+    def __repr__(self) -> str:
+        return (
+            f"<PlaylistTrack(title={self.title}, artist={self.artist}, "
+            f"playlist_id={self.playlist_id}>"
+        )
+
+    def set_plr(self, session: scoped_session, plr: PlaylistRows,
+                tab: PlaylistTab) -> None:
+        """
+        Update with new plr information
+        """
+
+        if not plr.track:
+            return
+
+        self.playlist_tab = tab
+        session.add(plr)
+        track = plr.track
+
+        self.artist = track.artist
+        self.duration = track.duration
+        self.end_time = None
+        self.fade_at = track.fade_at
+        self.fade_graph = FadeCurve(track)
+        self.path = track.path
+        self.playlist_id = plr.playlist_id
+        self.plr_id = plr.id
+        self.silence_at = track.silence_at
+        self.start_gap = track.start_gap
+        self.start_time = None
+        self.title = track.title
+        self.track_id = track.id
+
+        if track.silence_at and track.fade_at:
+            self.fade_length = track.silence_at - track.fade_at
+
+    def start(self) -> None:
+        """
+        Called when track starts playing
+        """
+
+        self.start_time = datetime.now()
+        if self.duration:
+            self.end_time = (
+                self.start_time + timedelta(milliseconds=self.duration))
+
+
 class Window(QMainWindow, Ui_MainWindow):
     def __init__(self, parent=None, *args, **kwargs) -> None:
         super().__init__(*args, **kwargs)
@@ -303,7 +355,10 @@ class Window(QMainWindow, Ui_MainWindow):
         self.txtSearch.setHidden(True)
         self.hide_played_tracks = False
         mixer.init()
-        matplotlib.use('QtAgg')
+        self.widgetFadeVolume.hideAxis('bottom')
+        self.widgetFadeVolume.hideAxis('left')
+        self.widgetFadeVolume.setBackground(Config.FADE_CURVE_BACKGROUND)
+        FadeCurve.GraphWidget = self.widgetFadeVolume
 
         self.visible_playlist_tab: Callable[[], PlaylistTab] = \
             self.tabPlaylist.currentWidget
@@ -315,6 +370,7 @@ class Window(QMainWindow, Ui_MainWindow):
         else:
             self.carts_init()
         self.enable_play_next_controls()
+        self.clock_counter = 0
         self.timer.start(Config.TIMER_MS)
         self.connect_signals_slots()
 
@@ -766,6 +822,7 @@ class Window(QMainWindow, Ui_MainWindow):
          - Tell playlist_tab track has finished
          - Reset PlaylistTrack objects
          - Reset clocks
+         - Reset fade graph
          - Update headers
          - Enable controls
         """
@@ -778,6 +835,9 @@ class Window(QMainWindow, Ui_MainWindow):
         if self.current_track.playlist_tab:
             self.current_track.playlist_tab.play_ended()
 
+        # Reset fade graph
+        self.current_track.fade_graph.clear()
+
         # Reset PlaylistTrack objects
         if self.current_track.track_id:
             self.previous_track = self.current_track
@@ -1250,9 +1310,7 @@ class Window(QMainWindow, Ui_MainWindow):
                 sleep(0.1)
 
             # Show closing volume graph
-            sc = MplCanvas(self, width=2, height=2, dpi=100)
-            # sc.axes.plot([0, 1, 2, 3, 4],  [10, 1, 20, 3, 40])
-            self.horizontalLayout_graph.addWidget(sc)
+            self.current_track.fade_graph.plot()
 
             # Tell database to record it as played
             Playdates(session, self.current_track.track_id)
@@ -1538,7 +1596,7 @@ class Window(QMainWindow, Ui_MainWindow):
     def set_next_plr_id(self, next_plr_id: Optional[int],
                         playlist_tab: PlaylistTab) -> None:
         """
-        Set  passed plr_id as next track to play, or clear next track if None
+        Set passed plr_id as next track to play, or clear next track if None
 
         Actions required:
          - Update self.next_track PlaylistTrack structure
@@ -1615,6 +1673,11 @@ class Window(QMainWindow, Ui_MainWindow):
         """
         Carry out clock tick actions.
 
+        self.clock_counter is incrememted at each tick (100ms), and this
+        value is used to determine the actions to take.
+
+        The Fade Volume graph is updated every 100ms.
+
         The Time of Day clock and any cart progress bars are updated
         every tick (500ms).
 
@@ -1624,6 +1687,7 @@ class Window(QMainWindow, Ui_MainWindow):
         updating. That looks odd.
 
         Actions required:
+        - Update Fade Volume graph
         - Update TOD clock
         - Call cart_tick
         - If track is playing:
@@ -1632,74 +1696,78 @@ class Window(QMainWindow, Ui_MainWindow):
             run stop_track
         """
 
-        # Update TOD clock
-        self.lblTOD.setText(datetime.now().strftime(Config.TOD_TIME_FORMAT))
-        # Update carts
-        self.cart_tick()
+        # Update volume fade curve
+        if self.current_track.track_id and self.current_track.fade_graph:
+            self.current_track.fade_graph.tick(self.music.get_playtime())
 
-        self.even_tick = not self.even_tick
-        if not self.even_tick:
-            return
-        if not self.playing:
-            return
+        if self.clock_counter % 2 == 0:
+            # Update TOD clock
+            self.lblTOD.setText(datetime.now().strftime(
+                Config.TOD_TIME_FORMAT))
+            # Update carts
+            self.cart_tick()
 
-        # If track is playing, update track clocks time and colours
-        # There is a discrete time between starting playing a track and
-        # player.is_playing() returning True, so assume playing if less
-        # than Config.PLAY_SETTLE microseconds have passed since
-        # starting play.
-        if self.music.player and self.current_track.start_time and (
-                self.music.player.is_playing() or
-                (datetime.now() - self.current_track.start_time)
-                < timedelta(microseconds=Config.PLAY_SETTLE)):
-            playtime = self.music.get_playtime()
-            time_to_fade = (self.current_track.fade_at - playtime)
-            time_to_silence = (
-                    self.current_track.silence_at - playtime)
-            time_to_end = (self.current_track.duration - playtime)
+        if self.clock_counter % 5 == 0:
+            if not self.playing:
+                return
 
-            # Elapsed time
-            self.label_elapsed_timer.setText(helpers.ms_to_mmss(playtime))
+            # If track is playing, update track clocks time and colours
+            # There is a discrete time between starting playing a track and
+            # player.is_playing() returning True, so assume playing if less
+            # than Config.PLAY_SETTLE microseconds have passed since
+            # starting play.
+            if self.music.player and self.current_track.start_time and (
+                    self.music.player.is_playing() or
+                    (datetime.now() - self.current_track.start_time)
+                    < timedelta(microseconds=Config.PLAY_SETTLE)):
+                playtime = self.music.get_playtime()
+                time_to_fade = (self.current_track.fade_at - playtime)
+                time_to_silence = (
+                        self.current_track.silence_at - playtime)
+                time_to_end = (self.current_track.duration - playtime)
 
-            # Time to fade
-            self.label_fade_timer.setText(helpers.ms_to_mmss(time_to_fade))
+                # Elapsed time
+                self.label_elapsed_timer.setText(helpers.ms_to_mmss(playtime))
 
-            # If silent in the next 5 seconds, put warning colour on
-            # time to silence box and enable play controls
-            if time_to_silence <= 5500:
-                self.frame_silent.setStyleSheet(
-                    f"background: {Config.COLOUR_ENDING_TIMER}"
+                # Time to fade
+                self.label_fade_timer.setText(helpers.ms_to_mmss(time_to_fade))
+
+                # If silent in the next 5 seconds, put warning colour on
+                # time to silence box and enable play controls
+                if time_to_silence <= 5500:
+                    self.frame_silent.setStyleSheet(
+                        f"background: {Config.COLOUR_ENDING_TIMER}"
+                    )
+                    self.enable_play_next_controls()
+                # Set warning colour on time to silence box when fade starts
+                elif time_to_fade <= 500:
+                    self.frame_silent.setStyleSheet(
+                        f"background: {Config.COLOUR_WARNING_TIMER}"
+                    )
+                # Five seconds before fade starts, set warning colour on
+                # time to silence box and enable play controls
+                elif time_to_fade <= 5500:
+                    self.frame_fade.setStyleSheet(
+                        f"background: {Config.COLOUR_WARNING_TIMER}"
+                    )
+                    self.enable_play_next_controls()
+                else:
+                    self.frame_silent.setStyleSheet("")
+                    self.frame_fade.setStyleSheet("")
+
+                self.label_silent_timer.setText(
+                    helpers.ms_to_mmss(time_to_silence)
                 )
-                self.enable_play_next_controls()
-            # Set warning colour on time to silence box when fade starts
-            elif time_to_fade <= 500:
-                self.frame_silent.setStyleSheet(
-                    f"background: {Config.COLOUR_WARNING_TIMER}"
-                )
-            # Five seconds before fade starts, set warning colour on
-            # time to silence box and enable play controls
-            elif time_to_fade <= 5500:
-                self.frame_fade.setStyleSheet(
-                    f"background: {Config.COLOUR_WARNING_TIMER}"
-                )
-                self.enable_play_next_controls()
+
+                # Time to end
+                self.label_end_timer.setText(helpers.ms_to_mmss(time_to_end))
+
+                # Autoplay next track
+                # if time_to_silence <= 1500:
+                #     self.play_next()
             else:
-                self.frame_silent.setStyleSheet("")
-                self.frame_fade.setStyleSheet("")
-
-            self.label_silent_timer.setText(
-                helpers.ms_to_mmss(time_to_silence)
-            )
-
-            # Time to end
-            self.label_end_timer.setText(helpers.ms_to_mmss(time_to_end))
-
-            # Autoplay next track
-            # if time_to_silence <= 1500:
-            #     self.play_next()
-        else:
-            if self.playing:
-                self.stop_playing()
+                if self.playing:
+                    self.stop_playing()
 
     def update_headers(self) -> None:
         """

app/ui/main_window.ui

@@ -349,6 +349,12 @@ padding-left: 8px;</string>
     </item>
     <item row="5" column="0">
      <widget class="QFrame" name="InfoFooterFrame">
+      <property name="maximumSize">
+       <size>
+        <width>16777215</width>
+        <height>16777215</height>
+       </size>
+      </property>
       <property name="styleSheet">
        <string notr="true">background-color: rgb(192, 191, 188)</string>
       </property>
@@ -440,18 +446,11 @@ padding-left: 8px;</string>
            </layout>
           </widget>
          </item>
-         <item>
-          <layout class="QHBoxLayout" name="horizontalLayout_graph">
-           <property name="sizeConstraint">
-            <enum>QLayout::SetDefaultConstraint</enum>
-           </property>
-          </layout>
-         </item>
          <item>
           <widget class="QFrame" name="frame_elapsed">
            <property name="minimumSize">
             <size>
-             <width>0</width>
+             <width>152</width>
              <height>112</height>
             </size>
            </property>
@@ -503,7 +502,7 @@ padding-left: 8px;</string>
           <widget class="QFrame" name="frame_fade">
            <property name="minimumSize">
             <size>
-             <width>0</width>
+             <width>152</width>
              <height>112</height>
             </size>
            </property>
@@ -549,10 +548,26 @@ padding-left: 8px;</string>
           </widget>
          </item>
          <item>
-          <widget class="QFrame" name="frame_silent">
+          <widget class="PlotWidget" name="widgetFadeVolume" native="true">
+           <property name="sizePolicy">
+            <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
+             <horstretch>1</horstretch>
+             <verstretch>0</verstretch>
+            </sizepolicy>
+           </property>
            <property name="minimumSize">
             <size>
              <width>0</width>
+             <height>0</height>
+            </size>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QFrame" name="frame_silent">
+           <property name="minimumSize">
+            <size>
+             <width>152</width>
              <height>112</height>
             </size>
            </property>
@@ -601,7 +616,7 @@ padding-left: 8px;</string>
           <widget class="QFrame" name="frame_end">
            <property name="minimumSize">
             <size>
-             <width>0</width>
+             <width>152</width>
              <height>112</height>
             </size>
            </property>
@@ -1155,6 +1170,12 @@ padding-left: 8px;</string>
    <header>infotabs</header>
    <container>1</container>
   </customwidget>
+  <customwidget>
+   <class>PlotWidget</class>
+   <extends>QWidget</extends>
+   <header>pyqtgraph</header>
+   <container>1</container>
+  </customwidget>
  </customwidgets>
  <resources>
   <include location="icons.qrc"/>

app/ui/main_window_ui.py

@@ -179,6 +179,7 @@ class Ui_MainWindow(object):
         self.tabInfolist.setObjectName("tabInfolist")
         self.gridLayout_4.addWidget(self.splitter, 4, 0, 1, 1)
         self.InfoFooterFrame = QtWidgets.QFrame(parent=self.centralwidget)
+        self.InfoFooterFrame.setMaximumSize(QtCore.QSize(16777215, 16777215))
         self.InfoFooterFrame.setStyleSheet("background-color: rgb(192, 191, 188)")
         self.InfoFooterFrame.setFrameShape(QtWidgets.QFrame.Shape.StyledPanel)
         self.InfoFooterFrame.setFrameShadow(QtWidgets.QFrame.Shadow.Raised)
@@ -214,11 +215,8 @@ class Ui_MainWindow(object):
         self.btnPreview.setObjectName("btnPreview")
         self.gridLayout.addWidget(self.btnPreview, 1, 0, 1, 2)
         self.horizontalLayout.addWidget(self.FadeStopInfoFrame)
-        self.horizontalLayout_graph = QtWidgets.QHBoxLayout()
-        self.horizontalLayout_graph.setObjectName("horizontalLayout_graph")
-        self.horizontalLayout.addLayout(self.horizontalLayout_graph)
         self.frame_elapsed = QtWidgets.QFrame(parent=self.InfoFooterFrame)
-        self.frame_elapsed.setMinimumSize(QtCore.QSize(0, 112))
+        self.frame_elapsed.setMinimumSize(QtCore.QSize(152, 112))
         self.frame_elapsed.setStyleSheet("")
         self.frame_elapsed.setFrameShape(QtWidgets.QFrame.Shape.StyledPanel)
         self.frame_elapsed.setFrameShadow(QtWidgets.QFrame.Shadow.Raised)
@@ -242,7 +240,7 @@ class Ui_MainWindow(object):
         self.verticalLayout_4.addWidget(self.label_elapsed_timer)
         self.horizontalLayout.addWidget(self.frame_elapsed)
         self.frame_fade = QtWidgets.QFrame(parent=self.InfoFooterFrame)
-        self.frame_fade.setMinimumSize(QtCore.QSize(0, 112))
+        self.frame_fade.setMinimumSize(QtCore.QSize(152, 112))
         self.frame_fade.setStyleSheet("")
         self.frame_fade.setFrameShape(QtWidgets.QFrame.Shape.StyledPanel)
         self.frame_fade.setFrameShadow(QtWidgets.QFrame.Shadow.Raised)
@@ -264,8 +262,17 @@ class Ui_MainWindow(object):
         self.label_fade_timer.setObjectName("label_fade_timer")
         self.verticalLayout_2.addWidget(self.label_fade_timer)
         self.horizontalLayout.addWidget(self.frame_fade)
+        self.widgetFadeVolume = PlotWidget(parent=self.InfoFooterFrame)
+        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Policy.Preferred, QtWidgets.QSizePolicy.Policy.Preferred)
+        sizePolicy.setHorizontalStretch(1)
+        sizePolicy.setVerticalStretch(0)
+        sizePolicy.setHeightForWidth(self.widgetFadeVolume.sizePolicy().hasHeightForWidth())
+        self.widgetFadeVolume.setSizePolicy(sizePolicy)
+        self.widgetFadeVolume.setMinimumSize(QtCore.QSize(0, 0))
+        self.widgetFadeVolume.setObjectName("widgetFadeVolume")
+        self.horizontalLayout.addWidget(self.widgetFadeVolume)
         self.frame_silent = QtWidgets.QFrame(parent=self.InfoFooterFrame)
-        self.frame_silent.setMinimumSize(QtCore.QSize(0, 112))
+        self.frame_silent.setMinimumSize(QtCore.QSize(152, 112))
         self.frame_silent.setStyleSheet("")
         self.frame_silent.setFrameShape(QtWidgets.QFrame.Shape.StyledPanel)
         self.frame_silent.setFrameShadow(QtWidgets.QFrame.Shadow.Raised)
@@ -288,7 +295,7 @@ class Ui_MainWindow(object):
         self.verticalLayout_5.addWidget(self.label_silent_timer)
         self.horizontalLayout.addWidget(self.frame_silent)
         self.frame_end = QtWidgets.QFrame(parent=self.InfoFooterFrame)
-        self.frame_end.setMinimumSize(QtCore.QSize(0, 112))
+        self.frame_end.setMinimumSize(QtCore.QSize(152, 112))
         self.frame_end.setStyleSheet("")
         self.frame_end.setFrameShape(QtWidgets.QFrame.Shape.StyledPanel)
         self.frame_end.setFrameShadow(QtWidgets.QFrame.Shadow.Raised)
@@ -615,3 +622,4 @@ class Ui_MainWindow(object):
         self.actionSearch_title_in_Songfacts.setText(_translate("MainWindow", "Search title in Songfacts"))
         self.actionSearch_title_in_Songfacts.setShortcut(_translate("MainWindow", "Ctrl+S"))
 from infotabs import InfoTabs
+from pyqtgraph import PlotWidget