switch from PyQt6 to PySide6

PySide6 uses LGPL instead of GPL, which is much nicer to work with.

bigtext.py

@@ -4,12 +4,12 @@ import math
 import os
 import time
 from typing import Callable, List
-from PyQt6 import QtGui
+from PySide6 import QtGui
 
-from PyQt6.QtCore import *
-from PyQt6.QtGui import *
-from PyQt6.QtGui import QMouseEvent
-from PyQt6.QtWidgets import *
+from PySide6.QtCore import *
+from PySide6.QtGui import *
+from PySide6.QtGui import QMouseEvent
+from PySide6.QtWidgets import *
 
 import constants
 from ScaledScrollBar import ScaledScrollBar
@@ -19,7 +19,7 @@ from highlighted_range import HighlightedRange
 from highlightingdialog import HighlightingDialog
 from line import Line
 from logFileModel import LogFileModel
-
+from raven.pluginregistry import PluginRegistry
 
 from ravenui import RavenUI
 from settings import Settings
@@ -86,7 +86,7 @@ class BigText(QWidget):
 
         self.v_scroll_bar = ScaledScrollBar()
         # self.v_scroll_bar.setPageStep(1)
-        self.v_scroll_bar.valueChanged.connect(self.big_text.v_scroll_event)
+        self.v_scroll_bar.scaledValueChanged.connect(self.big_text.v_scroll_event)
 
         self.grid.addWidget(self.big_text, 0, 0)
         self.grid.addWidget(self.h_scroll_bar, 1, 0)
@@ -271,11 +271,13 @@ class InnerBigText(QWidget):
             self._left_offset = self._left_offset + 2
             self.update()
 
+    @Slot()
     def h_scroll_event(self, left_offset: int):
         self._left_offset = left_offset
         # print("left_offset: %d" % left_offset)
         self.update()
 
+    @Slot()
     def v_scroll_event(self, byte_offset: str):
         self._byte_offset = int(byte_offset)
         self.update()
@@ -354,13 +356,13 @@ class InnerBigText(QWidget):
             dialog = QFileDialog(self)
             (selected_file, _filter) = dialog.getSaveFileName(
                 caption=self.tr("Save File"),
-                directory=os.path.dirname(self.model.get_file())
+                dir=os.path.dirname(self.model.get_file())
             )
             if selected_file:
                 self.model.write_range(start, end, selected_file)
                 open_tab = self.model.settings.session.getboolean("general", "open_tab_on_save_as_file")
                 if open_tab:
-                    RavenUI.window.open_file(selected_file)
+                    PluginRegistry.execute("open_file", selected_file)
 
     def _select_all(self):
         self.selection_highlight.start_byte = 0