V3: fix display corruption when moving a header row

When a track is moved to above the marked next track, and the moved
track is made the next track, the original next track remained marked
as next.

app/classes.py

@@ -104,10 +104,6 @@ class PlaylistTrack:
     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

app/config.py

@@ -32,16 +32,6 @@ class Config(object):
     COLOUR_ODD_PLAYLIST = "#f2f2f2"
     COLOUR_UNREADABLE = "#dc3545"
     COLOUR_WARNING_TIMER = "#ffc107"
-    COLUMN_NAME_ARTIST = "Artist"
-    COLUMN_NAME_AUTOPLAY = "A"
-    COLUMN_NAME_BITRATE = "bps"
-    COLUMN_NAME_END_TIME = "End"
-    COLUMN_NAME_LAST_PLAYED = "Last played"
-    COLUMN_NAME_LEADING_SILENCE = "Gap"
-    COLUMN_NAME_LENGTH = "Length"
-    COLUMN_NAME_NOTES = "Notes"
-    COLUMN_NAME_START_TIME = "Start"
-    COLUMN_NAME_TITLE = "Title"
     DBFS_SILENCE = -50
     DEBUG_FUNCTIONS: List[Optional[str]] = []
     DEBUG_MODULES: List[Optional[str]] = ["dbconfig"]

app/dbconfig.py

@@ -31,9 +31,7 @@ def Session() -> Generator[scoped_session, None, None]:
     function = frame.function
     lineno = frame.lineno
     Session = scoped_session(sessionmaker(bind=engine))
-    log.debug(
-        f"Session acquired: {file}:{function}:{lineno} " f"[{hex(id(Session))}]"
-    )
+    log.debug(f"Session acquired: {file}:{function}:{lineno} " f"[{hex(id(Session))}]")
     yield Session
     log.debug(f" Session released [{hex(id(Session))}]")
     Session.commit()

app/dialogs.py

@@ -87,7 +87,7 @@ class TrackSelectDialog(QDialog):
                 default_yes=True,
             ):
                 move_existing = True
-        if self.add_to_header and existing_prd:  # and existing_prd for mypy's benefit
+        if self.add_to_header and existing_prd:  # "and existing_prd" for mypy's benefit
             if move_existing:
                 self.model.move_track_to_header(self.new_row_number, existing_prd, note)
             else:
@@ -95,7 +95,7 @@ class TrackSelectDialog(QDialog):
             # Close dialog - we can only add one track to a header
             self.accept()
         else:
-            if move_existing and existing_prd:  # and existing_prd for mypy's benefit
+            if move_existing and existing_prd:  # "and existing_prd" for mypy's benefit
                 self.model.move_track_add_note(self.new_row_number, existing_prd, note)
             else:
                 self.model.insert_row(self.new_row_number, track_id, note)

app/helpers.py

@@ -14,7 +14,7 @@ from mutagen.flac import FLAC  # type: ignore
 from mutagen.mp3 import MP3  # type: ignore
 from pydub import AudioSegment, effects
 from pydub.utils import mediainfo
-from PyQt6.QtWidgets import QMainWindow, QMessageBox  # type: ignore
+from PyQt6.QtWidgets import QMainWindow, QMessageBox
 from tinytag import TinyTag  # type: ignore
 
 from config import Config
@@ -99,7 +99,7 @@ def get_audio_segment(path: str) -> Optional[AudioSegment]:
 
 
 def get_embedded_time(text: str) -> Optional[datetime]:
-    """Return datetime specified as @hh:mm:ss in text"""
+    """Return datetime specified as @hh:mm in text"""
 
     try:
         match = start_time_re.search(text)
@@ -171,7 +171,7 @@ def get_relative_date(
     weeks, days = divmod((reference_date.date() - past_date.date()).days, 7)
     if weeks == days == 0:
         # Same day so return time instead
-        return past_date.strftime("%H:%M")
+        return Config.LAST_PLAYED_TODAY_STRING + " " + past_date.strftime("%H:%M")
     if weeks == 1:
         weeks_str = "week"
     else:
@@ -226,32 +226,6 @@ def leading_silence(
     return min(trim_ms, len(audio_segment))
 
 
-def send_mail(to_addr, from_addr, subj, body):
-    # From https://docs.python.org/3/library/email.examples.html
-
-    # Create a text/plain message
-    msg = EmailMessage()
-    msg.set_content(body)
-
-    msg["Subject"] = subj
-    msg["From"] = from_addr
-    msg["To"] = to_addr
-
-    # Send the message via SMTP server.
-    context = ssl.create_default_context()
-    try:
-        s = smtplib.SMTP(host=Config.MAIL_SERVER, port=Config.MAIL_PORT)
-        if Config.MAIL_USE_TLS:
-            s.starttls(context=context)
-        if Config.MAIL_USERNAME and Config.MAIL_PASSWORD:
-            s.login(Config.MAIL_USERNAME, Config.MAIL_PASSWORD)
-        s.send_message(msg)
-    except Exception as e:
-        print(e)
-    finally:
-        s.quit()
-
-
 def ms_to_mmss(
     ms: Optional[int],
     decimals: int = 0,
@@ -390,6 +364,32 @@ def open_in_audacity(path: str) -> bool:
     return True
 
 
+def send_mail(to_addr, from_addr, subj, body):
+    # From https://docs.python.org/3/library/email.examples.html
+
+    # Create a text/plain message
+    msg = EmailMessage()
+    msg.set_content(body)
+
+    msg["Subject"] = subj
+    msg["From"] = from_addr
+    msg["To"] = to_addr
+
+    # Send the message via SMTP server.
+    context = ssl.create_default_context()
+    try:
+        s = smtplib.SMTP(host=Config.MAIL_SERVER, port=Config.MAIL_PORT)
+        if Config.MAIL_USE_TLS:
+            s.starttls(context=context)
+        if Config.MAIL_USERNAME and Config.MAIL_PASSWORD:
+            s.login(Config.MAIL_USERNAME, Config.MAIL_PASSWORD)
+        s.send_message(msg)
+    except Exception as e:
+        print(e)
+    finally:
+        s.quit()
+
+
 def set_track_metadata(track):
     """Set/update track metadata in database"""
 

app/models.py

@@ -307,8 +307,7 @@ class Playlists(Base):
         """
 
         return session.scalars(
-            select(cls).where(cls.open.is_(True))
-            .order_by(cls.tab)
+            select(cls).where(cls.open.is_(True)).order_by(cls.tab)
         ).all()
 
     def mark_open(self) -> None:
@@ -323,10 +322,10 @@ class Playlists(Base):
         Return True if no playlist of this name exists else false.
         """
 
-        return session.execute(
-            select(Playlists)
-            .where(Playlists.name == name)
-        ).first() is None
+        return (
+            session.execute(select(Playlists).where(Playlists.name == name)).first()
+            is None
+        )
 
     def rename(self, session: scoped_session, new_name: str) -> None:
         """
@@ -479,9 +478,7 @@ class PlaylistRows(Base):
         session.flush()
 
     @staticmethod
-    def delete_row(
-        session: scoped_session, playlist_id: int, row_number: int
-    ) -> None:
+    def delete_row(session: scoped_session, playlist_id: int, row_number: int) -> None:
         """
         Delete passed row in given playlist.
         """

app/music.py

@@ -1,8 +1,6 @@
-# import os
 import threading
 import vlc  # type: ignore
 
-#
 from config import Config
 from helpers import file_is_unreadable
 from typing import Optional
@@ -10,7 +8,7 @@ from time import sleep
 
 from log import log
 
-from PyQt6.QtCore import (  # type: ignore
+from PyQt6.QtCore import (
     QRunnable,
     QThreadPool,
 )

app/musicmuster.py

@@ -65,7 +65,7 @@ from dbconfig import (
 from dialogs import TrackSelectDialog
 from log import log
 from models import Base, Carts, Playdates, PlaylistRows, Playlists, Settings, Tracks
-from playlistmodel import PlaylistModel
+from playlistmodel import PlaylistModel, PlaylistProxyModel
 from playlists import PlaylistTab
 from ui.dlg_cart_ui import Ui_DialogCartEdit  # type: ignore
 from ui.dlg_SelectPlaylist_ui import Ui_dlgSelectPlaylist  # type: ignore
@@ -218,7 +218,7 @@ class Window(QMainWindow, Ui_MainWindow):
         self.active_tab = lambda: self.tabPlaylist.currentWidget()
         self.active_model = lambda: self.tabPlaylist.currentWidget().model()
         self.move_source_rows: Optional[List[int]] = None
-        self.move_source_model: Optional[PlaylistModel] = None
+        self.move_source_model: Optional[PlaylistProxyModel] = None
 
         self.load_last_playlists()
         if Config.CARTS_HIDE:
@@ -1021,7 +1021,7 @@ class Window(QMainWindow, Ui_MainWindow):
         else:
             destination_row = self.active_model().rowCount()
 
-        if to_playlist_id == self.move_source_model.playlist_id:
+        if to_playlist_id == self.move_source_model.data_model.playlist_id:
             self.move_source_model.move_rows(self.move_source_rows, destination_row)
         else:
             self.move_source_model.move_rows_between_playlists(

app/playlistmodel.py

@@ -13,6 +13,7 @@ from PyQt6.QtCore import (
     QRegularExpression,
     QSortFilterProxyModel,
     Qt,
+    QTimer,
     QVariant,
 )
 from PyQt6.QtGui import (
@@ -170,7 +171,7 @@ class PlaylistModel(QAbstractTableModel):
             if plr:
                 # Add track to PlaylistRows
                 plr.track_id = track_id
-                # Add any further note
+                # Add any further note (header will already have a note)
                 if note:
                     plr.note += "\n" + note
                 # Reset header row spanning
@@ -262,9 +263,11 @@ class PlaylistModel(QAbstractTableModel):
         # Check for OBS scene change
         self.obs_scene_change(row_number)
 
-        # Update Playdates in database
         with Session() as session:
+            # Update Playdates in database
             Playdates(session, track_sequence.now.track_id)
+
+            # Mark track as played in playlist
             plr = session.get(PlaylistRows, track_sequence.now.plr_id)
             if plr:
                 plr.played = True
@@ -276,6 +279,11 @@ class PlaylistModel(QAbstractTableModel):
 
             # Update colour and times for current row
             self.invalidate_row(row_number)
+
+            # Update previous row in case we're hiding played rows
+            if track_sequence.previous.plr_rownum:
+                self.invalidate_row(track_sequence.previous.plr_rownum)
+
             # Update all other track times
             self.update_track_times()
 
@@ -305,32 +313,29 @@ class PlaylistModel(QAbstractTableModel):
         prd = self.playlist_rows[row]
 
         # Dispatch to role-specific functions
-        if role == Qt.ItemDataRole.DisplayRole:
-            return self.display_role(row, column, prd)
-        elif role == Qt.ItemDataRole.DecorationRole:
-            pass
-        elif role == Qt.ItemDataRole.EditRole:
-            return self.edit_role(row, column, prd)
-        elif role == Qt.ItemDataRole.ToolTipRole:
-            pass
-        elif role == Qt.ItemDataRole.StatusTipRole:
-            pass
-        elif role == Qt.ItemDataRole.WhatsThisRole:
-            pass
-        elif role == Qt.ItemDataRole.SizeHintRole:
-            pass
-        elif role == Qt.ItemDataRole.FontRole:
-            return self.font_role(row, column, prd)
-        elif role == Qt.ItemDataRole.TextAlignmentRole:
-            pass
-        elif role == Qt.ItemDataRole.BackgroundRole:
-            return self.background_role(row, column, prd)
-        elif role == Qt.ItemDataRole.ForegroundRole:
-            pass
-        elif role == Qt.ItemDataRole.CheckStateRole:
-            pass
-        elif role == Qt.ItemDataRole.InitialSortOrderRole:
-            pass
+        dispatch_table = {
+            int(Qt.ItemDataRole.DisplayRole): self.display_role,
+            int(Qt.ItemDataRole.EditRole): self.edit_role,
+            int(Qt.ItemDataRole.FontRole): self.font_role,
+            int(Qt.ItemDataRole.BackgroundRole): self.background_role,
+        }
+
+        if role in dispatch_table:
+            return dispatch_table[role](row, column, prd)
+
+        # Document other roles but don't use them
+        if role in [
+            Qt.ItemDataRole.DecorationRole,
+            Qt.ItemDataRole.ToolTipRole,
+            Qt.ItemDataRole.StatusTipRole,
+            Qt.ItemDataRole.WhatsThisRole,
+            Qt.ItemDataRole.SizeHintRole,
+            Qt.ItemDataRole.TextAlignmentRole,
+            Qt.ItemDataRole.ForegroundRole,
+            Qt.ItemDataRole.CheckStateRole,
+            Qt.ItemDataRole.InitialSortOrderRole,
+        ]:
+            return QVariant()
 
         # Fall through to no-op
         return QVariant()
@@ -351,49 +356,51 @@ class PlaylistModel(QAbstractTableModel):
 
             PlaylistRows.fixup_rownumbers(session, self.playlist_id)
             self.refresh_data(session)
-        self.row_order_changed(self.playlist_id)
+        self.reset_track_sequence_row_numbers()
 
     def display_role(self, row: int, column: int, prd: PlaylistRowData) -> QVariant:
         """
         Return text for display
         """
 
-        if not prd.path:
-            # No track so this is a header row
+        if self.is_header_row(row):
             if column == HEADER_NOTES_COLUMN:
                 self.signals.span_cells_signal.emit(
                     row, HEADER_NOTES_COLUMN, 1, self.columnCount() - 1
                 )
+                header_text = self.header_text(prd)
+                if not header_text:
+                    return QVariant(Config.TEXT_NO_TRACK_NO_NOTE)
+                else:
                     return QVariant(self.header_text(prd))
             else:
                 return QVariant()
 
-        if column == Col.START_GAP.value:
-            return QVariant(prd.start_gap)
-        if column == Col.TITLE.value:
-            return QVariant(prd.title)
-        if column == Col.ARTIST.value:
-            return QVariant(prd.artist)
-        if column == Col.DURATION.value:
-            return QVariant(ms_to_mmss(prd.duration))
         if column == Col.START_TIME.value:
             if row in self.start_end_times:
                 start_time = self.start_end_times[row].start_time
                 if start_time:
                     return QVariant(start_time.strftime(Config.TRACK_TIME_FORMAT))
             return QVariant()
+
         if column == Col.END_TIME.value:
             if row in self.start_end_times:
                 end_time = self.start_end_times[row].end_time
                 if end_time:
                     return QVariant(end_time.strftime(Config.TRACK_TIME_FORMAT))
             return QVariant()
-        if column == Col.LAST_PLAYED.value:
-            return QVariant(get_relative_date(prd.lastplayed))
-        if column == Col.BITRATE.value:
-            return QVariant(prd.bitrate)
-        if column == Col.NOTE.value:
-            return QVariant(prd.note)
+
+        dispatch_table = {
+            Col.START_GAP.value: QVariant(prd.start_gap),
+            Col.TITLE.value: QVariant(prd.title),
+            Col.ARTIST.value: QVariant(prd.artist),
+            Col.DURATION.value: QVariant(ms_to_mmss(prd.duration)),
+            Col.LAST_PLAYED.value: QVariant(get_relative_date(prd.lastplayed)),
+            Col.BITRATE.value: QVariant(prd.bitrate),
+            Col.NOTE.value: QVariant(prd.note),
+        }
+        if column in dispatch_table:
+            return dispatch_table[column]
 
         return QVariant()
 
@@ -407,27 +414,7 @@ class PlaylistModel(QAbstractTableModel):
         with Session() as session:
             self.refresh_data(session)
         super().endResetModel()
-        self.row_order_changed(self.playlist_id)
-
-    def get_duplicate_rows(self) -> List[int]:
-        """
-        Return a list of duplicate rows. If track appears in rows 2, 3 and 4, return [3, 4]
-        (ie, ignore the first, not-yet-duplicate, track).
-        """
-
-        found = []
-        result = []
-
-        for i in range(len(self.playlist_rows)):
-            track_id = self.playlist_rows[i].track_id
-            if track_id is None:
-                continue
-            if track_id in found:
-                result.append(i)
-            else:
-                found.append(track_id)
-
-        return result
+        self.reset_track_sequence_row_numbers()
 
     def edit_role(self, row: int, column: int, prd: PlaylistRowData) -> QVariant:
         """
@@ -480,6 +467,26 @@ class PlaylistModel(QAbstractTableModel):
 
         return QVariant(boldfont)
 
+    def get_duplicate_rows(self) -> List[int]:
+        """
+        Return a list of duplicate rows. If track appears in rows 2, 3 and 4, return [3, 4]
+        (ie, ignore the first, not-yet-duplicate, track).
+        """
+
+        found = []
+        result = []
+
+        for i in range(len(self.playlist_rows)):
+            track_id = self.playlist_rows[i].track_id
+            if track_id is None:
+                continue
+            if track_id in found:
+                result.append(i)
+            else:
+                found.append(track_id)
+
+        return result
+
     def _get_new_row_number(self, proposed_row_number: Optional[int]) -> int:
         """
         Sanitises proposed new row number.
@@ -499,6 +506,13 @@ class PlaylistModel(QAbstractTableModel):
 
         return new_row_number
 
+    def get_row_info(self, row_number: int) -> PlaylistRowData:
+        """
+        Return info about passed row
+        """
+
+        return self.playlist_rows[row_number]
+
     def get_row_track_path(self, row_number: int) -> str:
         """
         Return path of track associated with row or empty string if no track associated
@@ -517,13 +531,6 @@ class PlaylistModel(QAbstractTableModel):
 
         return duration
 
-    def get_row_info(self, row_number: int) -> PlaylistRowData:
-        """
-        Return info about passed row
-        """
-
-        return self.playlist_rows[row_number]
-
     def get_unplayed_rows(self) -> List[int]:
         """
         Return a list of unplayed row numbers
@@ -653,6 +660,19 @@ class PlaylistModel(QAbstractTableModel):
                         unplayed_count += 1
                         duration += row_prd.duration
 
+        elif prd.note == "-":
+            # If the hyphen is the only thing on the line, echo the note
+            # tha started the section without the trailing "+".
+            for row_number in range(prd.plr_rownum - 1, -1, -1):
+                row_prd = self.playlist_rows[row_number]
+                if self.is_header_row(row_number):
+                    if row_prd.note.endswith("-"):
+                        # We didn't find a matching section start
+                        break
+                    if row_prd.note.endswith("+"):
+                        return f"[End: {row_prd.note[:-1]}]"
+            return "-"
+
         return prd.note
 
     def hide_played_tracks(self, hide: bool) -> None:
@@ -665,22 +685,6 @@ class PlaylistModel(QAbstractTableModel):
             if self.is_played_row(row_number):
                 self.invalidate_row(row_number)
 
-    def is_header_row(self, row_number: int) -> bool:
-        """
-        Return True if row is a header row, else False
-        """
-
-        if row_number in self.playlist_rows:
-            return self.playlist_rows[row_number].path == ""
-        return False
-
-    def is_played_row(self, row_number: int) -> bool:
-        """
-        Return True if row is an unplayed track row, else False
-        """
-
-        return self.playlist_rows[row_number].played
-
     def insert_row(
         self,
         proposed_row_number: Optional[int],
@@ -704,7 +708,7 @@ class PlaylistModel(QAbstractTableModel):
             self.refresh_data(session)
             super().endInsertRows()
 
-        self.row_order_changed(self.playlist_id)
+        self.reset_track_sequence_row_numbers()
         self.invalidate_rows(list(range(new_row_number, len(self.playlist_rows))))
 
     def invalidate_row(self, modified_row: int) -> None:
@@ -725,6 +729,22 @@ class PlaylistModel(QAbstractTableModel):
         for modified_row in modified_rows:
             self.invalidate_row(modified_row)
 
+    def is_header_row(self, row_number: int) -> bool:
+        """
+        Return True if row is a header row, else False
+        """
+
+        if row_number in self.playlist_rows:
+            return self.playlist_rows[row_number].path == ""
+        return False
+
+    def is_played_row(self, row_number: int) -> bool:
+        """
+        Return True if row is an unplayed track row, else False
+        """
+
+        return self.playlist_rows[row_number].played
+
     def is_track_in_playlist(self, track_id: int) -> Optional[PlaylistRowData]:
         """
         If this track_id is in the playlist, return the PlaylistRowData object
@@ -737,21 +757,6 @@ class PlaylistModel(QAbstractTableModel):
 
         return None
 
-    def mark_unplayed(self, row_numbers: List[int]) -> None:
-        """
-        Mark row as unplayed
-        """
-
-        with Session() as session:
-            for row_number in row_numbers:
-                plr = session.get(PlaylistRows, self.playlist_rows[row_number].plrid)
-                if not plr:
-                    return
-                plr.played = False
-                self.refresh_row(session, row_number)
-
-        self.invalidate_rows(row_numbers)
-
     def move_rows(self, from_rows: List[int], to_row_number: int) -> None:
         """
         Move the playlist rows given to to_row and below.
@@ -785,12 +790,15 @@ class PlaylistModel(QAbstractTableModel):
             # Optimise: only add to map if there is a change
             if old_row != new_row:
                 row_map[old_row] = new_row
-                if self.is_header_row(old_row):
-                    # Reset column span
-                    self.signals.span_cells_signal.emit(
-                        old_row, HEADER_NOTES_COLUMN, 1, 1
-                    )
 
+        # Reset any header rows that we're moving
+        for moving_row in row_map:
+            if self.is_header_row(moving_row):
+                # Reset column span
+                print(f"Reset column span {moving_row=}")
+                self.signals.span_cells_signal.emit(
+                    moving_row, HEADER_NOTES_COLUMN, 1, 1
+                )
         # Check to see whether any rows in track_sequence have moved
         if track_sequence.previous.plr_rownum in row_map:
             track_sequence.previous.plr_rownum = row_map[
@@ -814,9 +822,24 @@ class PlaylistModel(QAbstractTableModel):
             self.refresh_data(session)
 
         # Update display
-        self.signals.row_order_changed_signal.emit(self.playlist_id)
+        self.reset_track_sequence_row_numbers()
         self.invalidate_rows(list(row_map.keys()))
 
+    def mark_unplayed(self, row_numbers: List[int]) -> None:
+        """
+        Mark row as unplayed
+        """
+
+        with Session() as session:
+            for row_number in row_numbers:
+                plr = session.get(PlaylistRows, self.playlist_rows[row_number].plrid)
+                if not plr:
+                    return
+                plr.played = False
+                self.refresh_row(session, row_number)
+
+        self.invalidate_rows(row_numbers)
+
     def move_rows_between_playlists(
         self, from_rows: List[int], to_row_number: int, to_playlist_id: int
     ) -> None:
@@ -867,7 +890,7 @@ class PlaylistModel(QAbstractTableModel):
             self.refresh_data(session)
 
         # Reset of model must come after session has been closed
-        self.signals.row_order_changed_signal.emit(self.playlist_id)
+        self.reset_track_sequence_row_numbers()
         self.signals.row_order_changed_signal.emit(to_playlist_id)
         self.signals.end_reset_model_signal.emit(to_playlist_id)
         self.update_track_times()
@@ -957,7 +980,6 @@ class PlaylistModel(QAbstractTableModel):
         Actions required:
         - sanity check
         - update display
-        - update track times
         """
 
         # Sanity check
@@ -1014,6 +1036,31 @@ class PlaylistModel(QAbstractTableModel):
                 self.invalidate_row(row_number)
                 self.signals.resize_rows_signal.emit(self.playlist_id)
 
+    def reset_track_sequence_row_numbers(self) -> None:
+        """
+        Signal handler for when row ordering has changed
+        """
+
+        # Check the track_sequence next, now and previous plrs and
+        # update the row number
+        with Session() as session:
+            if track_sequence.next.plr_rownum:
+                next_plr = session.get(PlaylistRows, track_sequence.next.plr_id)
+                if next_plr:
+                    track_sequence.next.plr_rownum = next_plr.plr_rownum
+            if track_sequence.now.plr_rownum:
+                now_plr = session.get(PlaylistRows, track_sequence.now.plr_id)
+                if now_plr:
+                    track_sequence.now.plr_rownum = now_plr.plr_rownum
+            if track_sequence.previous.plr_rownum:
+                previous_plr = session.get(
+                    PlaylistRows, track_sequence.previous.plr_id
+                )
+                if previous_plr:
+                    track_sequence.previous.plr_rownum = previous_plr.plr_rownum
+
+        self.update_track_times()
+
     def _reversed_contiguous_row_groups(
         self, row_numbers: List[int]
     ) -> List[List[int]]:
@@ -1052,26 +1099,11 @@ class PlaylistModel(QAbstractTableModel):
         Signal handler for when row ordering has changed
         """
 
+        # Only action if this is for us
         if playlist_id != self.playlist_id:
             return
 
-        with Session() as session:
-            if track_sequence.next.plr_rownum:
-                next_plr = session.get(PlaylistRows, track_sequence.next.plr_rownum)
-                if next_plr:
-                    track_sequence.next.plr_rownum = next_plr.plr_rownum
-            if track_sequence.now.plr_rownum:
-                now_plr = session.get(PlaylistRows, track_sequence.now.plr_rownum)
-                if now_plr:
-                    track_sequence.now.plr_rownum = now_plr.plr_rownum
-            if track_sequence.previous.plr_rownum:
-                previous_plr = session.get(
-                    PlaylistRows, track_sequence.previous.plr_rownum
-                )
-                if previous_plr:
-                    track_sequence.previous.plr_rownum = previous_plr.plr_rownum
-
-        self.update_track_times()
+        self.reset_track_sequence_row_numbers()
 
     def selection_is_sortable(self, row_numbers: List[int]) -> bool:
         """
@@ -1102,8 +1134,6 @@ class PlaylistModel(QAbstractTableModel):
         """
 
         next_row_was = track_sequence.next.plr_rownum
-        if next_row_was is not None:
-            self.invalidate_row(next_row_was)
 
         if row_number is None:
             if next_row_was is None:
@@ -1112,7 +1142,7 @@ class PlaylistModel(QAbstractTableModel):
             self.signals.next_track_changed_signal.emit()
             return
 
-        # Update playing_trtack
+        # Update playing_track
         with Session() as session:
             track_sequence.next = PlaylistTrack()
             try:
@@ -1137,6 +1167,9 @@ class PlaylistModel(QAbstractTableModel):
                     self.playlist_rows[row_number].title
                 )
                 self.invalidate_row(row_number)
+
+        if next_row_was is not None:
+            self.invalidate_row(next_row_was)
         self.update_track_times()
 
     def setData(
@@ -1268,10 +1301,6 @@ class PlaylistModel(QAbstractTableModel):
             if prd.played:
                 continue
 
-            # Don't schedule unplayable tracks
-            if file_is_unreadable(prd.path):
-                continue
-
             # If we're between the current and next row, zero out
             # times
             if (
@@ -1290,8 +1319,12 @@ class PlaylistModel(QAbstractTableModel):
                 if header_time:
                     next_start_time = header_time
             else:
-                # This is an unplayed track; set start/end if we have a
-                # start time
+                # This is an unplayed track
+                # Don't schedule unplayable tracks
+                if file_is_unreadable(prd.path):
+                    continue
+
+                # Set start/end if we have a start time
                 if next_start_time is None:
                     continue
                 if stend.start_time != next_start_time:
@@ -1319,14 +1352,14 @@ class PlaylistProxyModel(QSortFilterProxyModel):
 
     def __init__(
         self,
-        playlist_model: PlaylistModel,
+        data_model: PlaylistModel,
         *args,
         **kwargs,
     ):
-        self.playlist_model = playlist_model
+        self.data_model = data_model
         super().__init__(*args, **kwargs)
 
-        self.setSourceModel(playlist_model)
+        self.setSourceModel(data_model)
         # Search all columns
         self.setFilterKeyColumn(-1)
 
@@ -1335,8 +1368,8 @@ class PlaylistProxyModel(QSortFilterProxyModel):
         Subclass to filter by played status
         """
 
-        if self.playlist_model.played_tracks_hidden:
-            if self.playlist_model.is_played_row(source_row):
+        if self.data_model.played_tracks_hidden:
+            if self.data_model.is_played_row(source_row):
                 # Don't hide current or next track
                 with Session() as session:
                     if track_sequence.next.plr_id:
@@ -1344,7 +1377,7 @@ class PlaylistProxyModel(QSortFilterProxyModel):
                         if (
                             next_plr
                             and next_plr.plr_rownum == source_row
-                            and next_plr.playlist_id == self.playlist_model.playlist_id
+                            and next_plr.playlist_id == self.data_model.playlist_id
                         ):
                             return True
                     if track_sequence.now.plr_id:
@@ -1352,9 +1385,44 @@ class PlaylistProxyModel(QSortFilterProxyModel):
                         if (
                             now_plr
                             and now_plr.plr_rownum == source_row
-                            and now_plr.playlist_id == self.playlist_model.playlist_id
+                            and now_plr.playlist_id == self.data_model.playlist_id
                         ):
                             return True
+                    # Don't hide previous track until
+                    # HIDE_AFTER_PLAYING_OFFSET milliseconds after
+                    # current track has started
+                    if track_sequence.previous.plr_id:
+                        previous_plr = session.get(
+                            PlaylistRows, track_sequence.previous.plr_id
+                        )
+                        if (
+                            previous_plr
+                            and previous_plr.plr_rownum == source_row
+                            and previous_plr.playlist_id == self.data_model.playlist_id
+                        ):
+                            if track_sequence.now.start_time:
+                                if datetime.now() > (
+                                    track_sequence.now.start_time
+                                    + timedelta(
+                                        milliseconds=Config.HIDE_AFTER_PLAYING_OFFSET
+                                    )
+                                ):
+                                    return False
+                                else:
+                                    # Invalidate this row in
+                                    # HIDE_AFTER_PLAYING_OFFSET and a
+                                    # bit milliseconds
+                                    # so that it hides then - add 100mS
+                                    # on so that it if clause above it
+                                    # true next time through.
+                                    QTimer.singleShot(
+                                        Config.HIDE_AFTER_PLAYING_OFFSET + 100,
+                                        lambda: self.data_model.invalidate_row(source_row),
+                                    )
+                                    return True
+                            else:
+                                return True
+
                 return False
         return super().filterAcceptsRow(source_row, source_parent)
 
@@ -1374,25 +1442,25 @@ class PlaylistProxyModel(QSortFilterProxyModel):
     # ######################################
 
     def current_track_started(self):
-        return self.playlist_model.current_track_started()
+        return self.data_model.current_track_started()
 
     def delete_rows(self, row_numbers: List[int]) -> None:
-        return self.playlist_model.delete_rows(row_numbers)
+        return self.data_model.delete_rows(row_numbers)
 
     def get_duplicate_rows(self) -> List[int]:
-        return self.playlist_model.get_duplicate_rows()
+        return self.data_model.get_duplicate_rows()
 
     def get_rows_duration(self, row_numbers: List[int]) -> int:
-        return self.playlist_model.get_rows_duration(row_numbers)
+        return self.data_model.get_rows_duration(row_numbers)
 
     def get_row_info(self, row_number: int) -> PlaylistRowData:
-        return self.playlist_model.get_row_info(row_number)
+        return self.data_model.get_row_info(row_number)
 
     def get_row_track_path(self, row_number: int) -> str:
-        return self.playlist_model.get_row_track_path(row_number)
+        return self.data_model.get_row_track_path(row_number)
 
     def hide_played_tracks(self, hide: bool) -> None:
-        return self.playlist_model.hide_played_tracks(hide)
+        return self.data_model.hide_played_tracks(hide)
 
     def insert_row(
         self,
@@ -1400,70 +1468,68 @@ class PlaylistProxyModel(QSortFilterProxyModel):
         track_id: Optional[int] = None,
         note: Optional[str] = None,
     ) -> None:
-        return self.playlist_model.insert_row(proposed_row_number, track_id, note)
+        return self.data_model.insert_row(proposed_row_number, track_id, note)
 
     def is_header_row(self, row_number: int) -> bool:
-        return self.playlist_model.is_header_row(row_number)
+        return self.data_model.is_header_row(row_number)
 
     def is_played_row(self, row_number: int) -> bool:
-        return self.playlist_model.is_played_row(row_number)
+        return self.data_model.is_played_row(row_number)
 
     def is_track_in_playlist(self, track_id: int) -> Optional[PlaylistRowData]:
-        return self.playlist_model.is_track_in_playlist(track_id)
+        return self.data_model.is_track_in_playlist(track_id)
 
     def mark_unplayed(self, row_numbers: List[int]) -> None:
-        return self.playlist_model.mark_unplayed(row_numbers)
+        return self.data_model.mark_unplayed(row_numbers)
 
     def move_rows(self, from_rows: List[int], to_row_number: int) -> None:
-        return self.playlist_model.move_rows(from_rows, to_row_number)
+        return self.data_model.move_rows(from_rows, to_row_number)
 
     def move_rows_between_playlists(
         self, from_rows: List[int], to_row_number: int, to_playlist_id: int
     ) -> None:
-        return self.playlist_model.move_rows_between_playlists(
+        return self.data_model.move_rows_between_playlists(
             from_rows, to_row_number, to_playlist_id
         )
 
     def move_track_add_note(
         self, new_row_number: int, existing_prd: PlaylistRowData, note: str
     ) -> None:
-        return self.playlist_model.move_track_add_note(
-            new_row_number, existing_prd, note
-        )
+        return self.data_model.move_track_add_note(new_row_number, existing_prd, note)
 
     def move_track_to_header(
         self, header_row_number: int, existing_prd: PlaylistRowData, note: Optional[str]
     ) -> None:
-        return self.playlist_model.move_track_to_header(
+        return self.data_model.move_track_to_header(
             header_row_number, existing_prd, note
         )
 
     def open_in_audacity(self, row_number: int) -> None:
-        return self.playlist_model.open_in_audacity(row_number)
+        return self.data_model.open_in_audacity(row_number)
 
     def previous_track_ended(self) -> None:
-        return self.playlist_model.previous_track_ended()
+        return self.data_model.previous_track_ended()
 
     def remove_track(self, row_number: int) -> None:
-        return self.playlist_model.remove_track(row_number)
+        return self.data_model.remove_track(row_number)
 
     def rescan_track(self, row_number: int) -> None:
-        return self.playlist_model.rescan_track(row_number)
+        return self.data_model.rescan_track(row_number)
 
     def set_next_row(self, row_number: Optional[int]) -> None:
-        return self.playlist_model.set_next_row(row_number)
+        return self.data_model.set_next_row(row_number)
 
     def sort_by_artist(self, row_numbers: List[int]) -> None:
-        return self.playlist_model.sort_by_artist(row_numbers)
+        return self.data_model.sort_by_artist(row_numbers)
 
     def sort_by_duration(self, row_numbers: List[int]) -> None:
-        return self.playlist_model.sort_by_duration(row_numbers)
+        return self.data_model.sort_by_duration(row_numbers)
 
     def sort_by_lastplayed(self, row_numbers: List[int]) -> None:
-        return self.playlist_model.sort_by_lastplayed(row_numbers)
+        return self.data_model.sort_by_lastplayed(row_numbers)
 
     def sort_by_title(self, row_numbers: List[int]) -> None:
-        return self.playlist_model.sort_by_title(row_numbers)
+        return self.data_model.sort_by_title(row_numbers)
 
     def update_track_times(self) -> None:
-        return self.playlist_model.update_track_times()
+        return self.data_model.update_track_times()

app/playlists.py

@@ -34,6 +34,7 @@ from config import Config
 from helpers import (
     ask_yes_no,
     ms_to_mmss,
+    show_OK,
     show_warning,
 )
 from models import Settings
@@ -50,9 +51,9 @@ class EscapeDelegate(QStyledItemDelegate):
     - checks with user before abandoning edit on Escape
     """
 
-    def __init__(self, parent, playlist_model: PlaylistModel) -> None:
+    def __init__(self, parent, data_model: PlaylistModel) -> None:
         super().__init__(parent)
-        self.playlist_model = playlist_model
+        self.data_model = data_model
         self.signals = MusicMusterSignals()
 
     def createEditor(
@@ -113,7 +114,7 @@ class EscapeDelegate(QStyledItemDelegate):
         else:
             edit_index = index
 
-        value = self.playlist_model.data(edit_index, Qt.ItemDataRole.EditRole)
+        value = self.data_model.data(edit_index, Qt.ItemDataRole.EditRole)
         editor.setPlainText(value.value())
 
     def setModelData(self, editor, model, index):
@@ -124,7 +125,7 @@ class EscapeDelegate(QStyledItemDelegate):
             edit_index = index
 
         value = editor.toPlainText().strip()
-        self.playlist_model.setData(edit_index, value, Qt.ItemDataRole.EditRole)
+        self.data_model.setData(edit_index, value, Qt.ItemDataRole.EditRole)
 
     def updateEditorGeometry(self, editor, option, index):
         editor.setGeometry(option.rect)
@@ -149,6 +150,10 @@ class PlaylistStyle(QProxyStyle):
 
 
 class PlaylistTab(QTableView):
+    """
+    The playlist view
+    """
+
     def __init__(
         self,
         musicmuster: "Window",
@@ -161,9 +166,9 @@ class PlaylistTab(QTableView):
         self.playlist_id = playlist_id
 
         # Set up widget
-        self.playlist_model = PlaylistModel(playlist_id)
-        self.proxy_model = PlaylistProxyModel(self.playlist_model)
-        self.setItemDelegate(EscapeDelegate(self, self.playlist_model))
+        self.data_model = PlaylistModel(playlist_id)
+        self.proxy_model = PlaylistProxyModel(self.data_model)
+        self.setItemDelegate(EscapeDelegate(self, self.data_model))
         self.setAlternatingRowColors(True)
         self.setVerticalScrollMode(QAbstractItemView.ScrollMode.ScrollPerPixel)
         self.setDragDropMode(QAbstractItemView.DragDropMode.InternalMove)
@@ -190,10 +195,6 @@ class PlaylistTab(QTableView):
         self.signals.resize_rows_signal.connect(self.resizeRowsToContents)
         self.signals.span_cells_signal.connect(self._span_cells)
 
-        # Initialise miscellaneous instance variables
-        self.search_text: str = ""
-        self.sort_undo: List[int] = []
-
         # Selection model
         self.setSelectionMode(QAbstractItemView.SelectionMode.ExtendedSelection)
         self.setSelectionBehavior(QAbstractItemView.SelectionBehavior.SelectRows)
@@ -202,6 +203,8 @@ class PlaylistTab(QTableView):
         self.setModel(self.proxy_model)
         self._set_column_widths()
 
+    # ########## Overrident class functions ##########
+
     def closeEditor(
         self, editor: QWidget | None, hint: QAbstractItemDelegate.EndEditHint
     ) -> None:
@@ -220,7 +223,7 @@ class PlaylistTab(QTableView):
 
         # Update start times in case a start time in a note has been
         # edited
-        self.playlist_model.update_track_times()
+        self.data_model.update_track_times()
 
     def dropEvent(self, event):
         if event.source() is not self or (
@@ -240,6 +243,7 @@ class PlaylistTab(QTableView):
 
             # Reset drag mode to allow row selection by dragging
             self.setDragEnabled(False)
+
             # Deselect rows
             self.clear_selection()
 
@@ -252,7 +256,7 @@ class PlaylistTab(QTableView):
         event: Optional[QEvent],
     ) -> bool:
         """
-        Override PySide2.QAbstractItemView.edit to catch when editing starts
+        Override QAbstractItemView.edit to catch when editing starts
 
         Editing only ever starts with a double click on a cell
         """
@@ -264,6 +268,43 @@ class PlaylistTab(QTableView):
 
         return result
 
+    def mouseReleaseEvent(self, event):
+        """
+        Enable dragging if rows are selected
+        """
+
+        if self.selectedIndexes():
+            self.setDragEnabled(True)
+        else:
+            self.setDragEnabled(False)
+            self.reset()
+        super().mouseReleaseEvent(event)
+
+    def selectionChanged(
+        self, selected: QItemSelection, deselected: QItemSelection
+    ) -> None:
+        """
+        Toggle drag behaviour according to whether rows are selected
+        """
+
+        selected_rows = self.get_selected_rows()
+        # If no rows are selected, we have nothing to do
+        if len(selected_rows) == 0:
+            self.musicmuster.lblSumPlaytime.setText("")
+        else:
+            selected_duration = self.data_model.get_rows_duration(
+                self.get_selected_rows()
+            )
+            if selected_duration > 0:
+                self.musicmuster.lblSumPlaytime.setText(
+                    f"Selected duration: {ms_to_mmss(selected_duration)}"
+                )
+            else:
+                self.musicmuster.lblSumPlaytime.setText("")
+
+        super().selectionChanged(selected, deselected)
+
+    # ########## Custom functions ##########
     def _add_context_menu(
         self,
         text: str,
@@ -286,121 +327,6 @@ class PlaylistTab(QTableView):
 
         return menu_item
 
-    def mouseReleaseEvent(self, event):
-        """
-        Enable dragging if rows are selected
-        """
-
-        if self.selectedIndexes():
-            self.setDragEnabled(True)
-        else:
-            self.setDragEnabled(False)
-            self.reset()
-        super().mouseReleaseEvent(event)
-
-    #     # ########## Externally called functions ##########
-
-    def clear_selection(self) -> None:
-        """Unselect all tracks and reset drag mode"""
-
-        self.clearSelection()
-        self.setDragEnabled(False)
-
-    def selected_display_row_number(self):
-        """
-        Return the selected row number or None if none selected.
-        """
-
-        row_index = self._selected_row_index()
-        if row_index:
-            return row_index.row()
-        else:
-            return None
-        return row_index.row()
-
-    def selected_display_row_numbers(self):
-        """
-        Return a list of the selected row numbers
-        """
-
-        indexes = self._selected_row_indexes()
-
-        return [a.row() for a in indexes]
-
-    def selected_model_row_number(self) -> Optional[int]:
-        """
-        Return the model row number corresponding to the selected row or None
-        """
-
-        selected_index = self._selected_row_index()
-        if selected_index is None:
-            return None
-        if hasattr(self.proxy_model, "mapToSource"):
-            return self.proxy_model.mapToSource(selected_index).row()
-        return selected_index.row()
-
-    def selected_model_row_numbers(self) -> List[int]:
-        """
-        Return a list of model row numbers corresponding to the selected rows or
-        an empty list.
-        """
-
-        selected_indexes = self._selected_row_indexes()
-        if selected_indexes is None:
-            return []
-        if hasattr(self.proxy_model, "mapToSource"):
-            return [self.proxy_model.mapToSource(a).row() for a in selected_indexes]
-        return [a.row() for a in selected_indexes]
-
-    def _selected_row_index(self) -> Optional[QModelIndex]:
-        """
-        Return the selected row index or None if none selected.
-        """
-
-        row_indexes = self._selected_row_indexes()
-
-        if len(row_indexes) != 1:
-            show_warning(
-                self.musicmuster, "No or multiple rows selected", "Select only one row"
-            )
-            return None
-
-        return row_indexes[0]
-
-    def _selected_row_indexes(self) -> List[QModelIndex]:
-        """
-        Return a list of indexes of column 1 of selected rows
-        """
-
-        sm = self.selectionModel()
-        if sm and sm.hasSelection():
-            return sm.selectedRows()
-        return []
-
-    def get_selected_row_track_path(self) -> str:
-        """
-        Return the path of the selected row. If no row selected or selected
-        row does not have a track, return empty string.
-        """
-
-        model_row_number = self.selected_model_row_number()
-        if model_row_number is None:
-            return ""
-        return self.playlist_model.get_row_track_path(model_row_number)
-
-    def set_row_as_next_track(self) -> None:
-        """
-        Set selected row as next track
-        """
-
-        model_row_number = self.selected_model_row_number()
-        if model_row_number is None:
-            return
-        self.playlist_model.set_next_row(model_row_number)
-        self.clearSelection()
-
-    # #     # ########## Internally called functions ##########
-
     def _add_track(self) -> None:
         """Add a track to a section header making it a normal track row"""
 
@@ -412,7 +338,7 @@ class PlaylistTab(QTableView):
             dlg = TrackSelectDialog(
                 session=session,
                 new_row_number=model_row_number,
-                model=self.playlist_model,
+                model=self.data_model,
                 add_to_header=True,
             )
             dlg.exec()
@@ -516,6 +442,12 @@ class PlaylistTab(QTableView):
                 "Copy track path", lambda: self._copy_path(model_row_number)
             )
 
+    def clear_selection(self) -> None:
+        """Unselect all tracks and reset drag mode"""
+
+        self.clearSelection()
+        self.setDragEnabled(False)
+
     def _column_resize(self, column_number: int, _old: int, _new: int) -> None:
         """
         Called when column width changes. Save new width to database.
@@ -546,7 +478,7 @@ class PlaylistTab(QTableView):
         to the clipboard. Otherwise, return None.
         """
 
-        track_path = self.playlist_model.get_row_info(row_number).path
+        track_path = self.data_model.get_row_info(row_number).path
         if not track_path:
             return
 
@@ -583,9 +515,20 @@ class PlaylistTab(QTableView):
         if not ask_yes_no("Delete rows", f"Really delete {row_count} row{plural}?"):
             return
 
-        self.playlist_model.delete_rows(self.selected_model_row_numbers())
+        self.data_model.delete_rows(self.selected_model_row_numbers())
         self.clear_selection()
 
+    def get_selected_row_track_path(self) -> str:
+        """
+        Return the path of the selected row. If no row selected or selected
+        row does not have a track, return empty string.
+        """
+
+        model_row_number = self.selected_model_row_number()
+        if model_row_number is None:
+            return ""
+        return self.data_model.get_row_track_path(model_row_number)
+
     def get_selected_rows(self) -> List[int]:
         """Return a list of selected row numbers sorted by row"""
 
@@ -596,7 +539,7 @@ class PlaylistTab(QTableView):
     def _info_row(self, row_number: int) -> None:
         """Display popup with info re row"""
 
-        prd = self.playlist_model.get_row_info(row_number)
+        prd = self.data_model.get_row_info(row_number)
         if prd:
             txt = (
                 f"Title: {prd.title}\n"
@@ -610,23 +553,18 @@ class PlaylistTab(QTableView):
         else:
             txt = f"Can't find info about row{row_number}"
 
-        info: QMessageBox = QMessageBox(self)
-        info.setIcon(QMessageBox.Icon.Information)
-        info.setText(txt)
-        info.setStandardButtons(QMessageBox.StandardButton.Ok)
-        info.setDefaultButton(QMessageBox.StandardButton.Cancel)
-        info.exec()
+        show_OK(self.musicmuster, "Track info", txt)
 
     def _mark_as_unplayed(self, row_numbers: List[int]) -> None:
         """Rescan track"""
 
-        self.playlist_model.mark_unplayed(row_numbers)
+        self.data_model.mark_unplayed(row_numbers)
         self.clear_selection()
 
     def _rescan(self, row_number: int) -> None:
         """Rescan track"""
 
-        self.playlist_model.rescan_track(row_number)
+        self.data_model.rescan_track(row_number)
         self.clear_selection()
 
     def scroll_to_top(self, row_number: int) -> None:
@@ -653,36 +591,62 @@ class PlaylistTab(QTableView):
         # We need to be in MultiSelection mode
         self.setSelectionMode(QAbstractItemView.SelectionMode.MultiSelection)
         # Get the duplicate rows
-        duplicate_rows = self.playlist_model.get_duplicate_rows()
+        duplicate_rows = self.data_model.get_duplicate_rows()
         # Select the rows
         for duplicate_row in duplicate_rows:
             self.selectRow(duplicate_row)
         # Reset selection mode
         self.setSelectionMode(QAbstractItemView.SelectionMode.ExtendedSelection)
 
-    def selectionChanged(
-        self, selected: QItemSelection, deselected: QItemSelection
-    ) -> None:
+    def selected_model_row_number(self) -> Optional[int]:
         """
-        Toggle drag behaviour according to whether rows are selected
+        Return the model row number corresponding to the selected row or None
         """
 
-        selected_rows = self.get_selected_rows()
-        # If no rows are selected, we have nothing to do
-        if len(selected_rows) == 0:
-            self.musicmuster.lblSumPlaytime.setText("")
-        else:
-            selected_duration = self.playlist_model.get_rows_duration(
-                self.get_selected_rows()
-            )
-            if selected_duration > 0:
-                self.musicmuster.lblSumPlaytime.setText(
-                    f"Selected duration: {ms_to_mmss(selected_duration)}"
-                )
-            else:
-                self.musicmuster.lblSumPlaytime.setText("")
+        selected_index = self._selected_row_index()
+        if selected_index is None:
+            return None
+        if hasattr(self.proxy_model, "mapToSource"):
+            return self.proxy_model.mapToSource(selected_index).row()
+        return selected_index.row()
 
-        super().selectionChanged(selected, deselected)
+    def selected_model_row_numbers(self) -> List[int]:
+        """
+        Return a list of model row numbers corresponding to the selected rows or
+        an empty list.
+        """
+
+        selected_indexes = self._selected_row_indexes()
+        if selected_indexes is None:
+            return []
+        if hasattr(self.proxy_model, "mapToSource"):
+            return [self.proxy_model.mapToSource(a).row() for a in selected_indexes]
+        return [a.row() for a in selected_indexes]
+
+    def _selected_row_index(self) -> Optional[QModelIndex]:
+        """
+        Return the selected row index or None if none selected.
+        """
+
+        row_indexes = self._selected_row_indexes()
+
+        if len(row_indexes) != 1:
+            show_warning(
+                self.musicmuster, "No or multiple rows selected", "Select only one row"
+            )
+            return None
+
+        return row_indexes[0]
+
+    def _selected_row_indexes(self) -> List[QModelIndex]:
+        """
+        Return a list of indexes of column 1 of selected rows
+        """
+
+        sm = self.selectionModel()
+        if sm and sm.hasSelection():
+            return sm.selectedRows()
+        return []
 
     def _set_column_widths(self) -> None:
         """Column widths from settings"""
@@ -704,6 +668,17 @@ class PlaylistTab(QTableView):
                 else:
                     self.setColumnWidth(column_number, Config.DEFAULT_COLUMN_WIDTH)
 
+    def set_row_as_next_track(self) -> None:
+        """
+        Set selected row as next track
+        """
+
+        model_row_number = self.selected_model_row_number()
+        if model_row_number is None:
+            return
+        self.data_model.set_next_row(model_row_number)
+        self.clearSelection()
+
     def _span_cells(self, row: int, column: int, rowSpan: int, columnSpan: int) -> None:
         """
         Implement spanning of cells, initiated by signal
@@ -711,9 +686,7 @@ class PlaylistTab(QTableView):
 
         model = self.proxy_model
         if hasattr(model, "mapToSource"):
-            edit_index = model.mapFromSource(
-                self.playlist_model.createIndex(row, column)
-            )
+            edit_index = model.mapFromSource(self.data_model.createIndex(row, column))
             row = edit_index.row()
             column = edit_index.column()
 
@@ -731,5 +704,5 @@ class PlaylistTab(QTableView):
     def _unmark_as_next(self) -> None:
         """Rescan track"""
 
-        self.playlist_model.set_next_row(None)
+        self.data_model.set_next_row(None)
         self.clear_selection()

app/utilities.py

@@ -1,4 +1,4 @@
-# #!/usr/bin/env python
+#!/usr/bin/env python
 #
 import os
 

test_helpers.py

@@ -45,7 +45,7 @@ def test_get_relative_date():
     assert get_relative_date(None) == "Never"
     today_at_10 = datetime.now().replace(hour=10, minute=0)
     today_at_11 = datetime.now().replace(hour=11, minute=0)
-    assert get_relative_date(today_at_10, today_at_11) == "10:00"
+    assert get_relative_date(today_at_10, today_at_11) == "Today 10:00"
     eight_days_ago = today_at_10 - timedelta(days=8)
     assert get_relative_date(eight_days_ago, today_at_11) == "1 week, 1 day ago"
     sixteen_days_ago = today_at_10 - timedelta(days=16)