Made some gui improvements.

wobuzz/ui/library.py

@@ -1,6 +1,6 @@
 #!/usr/bin/python3
 
-from PyQt6.QtWidgets import QToolBox, QLabel, QFrame
+from PyQt6.QtWidgets import QToolBox, QLabel, QFrame, QTabWidget
 
 
 class Library(QToolBox):
@@ -10,8 +10,8 @@ class Library(QToolBox):
         self.setFrameShape(QFrame.Shape.Box)
         self.setFrameShadow(QFrame.Shadow.Sunken)
 
-        label = QLabel()
-        self.addItem(label, "Playlists")
+        playlist_tabs = QTabWidget()
+        self.addItem(playlist_tabs, "Playlists")
         label = QLabel()
         self.addItem(label, "Genres")
         label = QLabel()

wobuzz/ui/main_container.py

@@ -1,6 +1,6 @@
 #!/usr/bin/python3
 
-from PyQt6.QtWidgets import QWidget, QFrame, QDockWidget, QGridLayout
+from PyQt6.QtWidgets import QWidget, QGridLayout, QSizePolicy
 from .track_control import TrackControl
 from .lines import HLine
 
@@ -12,10 +12,10 @@ class MainContainer(QWidget):
         self.layout = QGridLayout()
         self.setLayout(self.layout)
 
-        self.layout.addWidget(HLine(self))
-
         self.track_control = TrackControl(self)
         self.layout.addWidget(self.track_control)
 
-        self.layout.addWidget(HLine(self))
+        self.layout.addWidget(HLine(self))  # track_control separator line
+
+        self.setSizePolicy(QSizePolicy.Policy.Preferred, QSizePolicy.Policy.Fixed)
 

wobuzz/ui/track_control.py

@@ -2,7 +2,7 @@
 
 from PyQt6.QtCore import Qt
 from PyQt6.QtGui import QIcon
-from PyQt6.QtWidgets import QToolBar, QLabel, QSlider
+from PyQt6.QtWidgets import QToolBar, QLabel
 from .track_progress_slider import TrackProgressSlider