Add upgrade option to settings menu

activity_browser/actions/__init__.py

@@ -59,3 +59,4 @@
 from .plugin_wizard_open import PluginWizardOpen
 from .settings_wizard_open import SettingsWizardOpen
 from .migrations_install import MigrationsInstall
+from .pyside_upgrade import PysideUpgrade

activity_browser/actions/pyside_upgrade.py

@@ -0,0 +1,47 @@
+import qtpy
+import os
+import sys
+import subprocess
+
+from activity_browser.actions.base import ABAction, exception_dialogs
+from activity_browser.ui.icons import qicons
+
+
+class PysideUpgrade(ABAction):
+    """
+    ABAction to install all the default data: biosphere, IC's etcetera.
+    """
+
+    icon = qicons.forward
+    text = "Upgrade installation to PySide6"
+
+    @classmethod
+    @exception_dialogs
+    def run(cls):
+        assert not qtpy.PYSIDE6, "Already running PySide6"
+        assert cls.in_conda(), "Not inside a Conda environment"
+
+        cls.pypi_install()
+        cls.set_conda_env_var()
+        cls.restart()
+
+
+    @staticmethod
+    def in_conda() -> bool:
+        return bool(os.environ.get("CONDA_DEFAULT_ENV", False))
+
+    @staticmethod
+    def pypi_install():
+        process = subprocess.run(["pip", "install", "pyside6"])
+        assert process.returncode == 0, "Failed to install PySide6"
+
+    @staticmethod
+    def set_conda_env_var():
+        subprocess.run(["conda", "env", "config", "vars", "set", "QT_API=pyside6"])
+        os.environ["QT_API"] = "pyside6"
+
+    @staticmethod
+    def restart():
+        subprocess.Popen(["python", "-c", "import activity_browser; activity_browser.run_activity_browser()"])
+        sys.exit()
+

activity_browser/ui/wizards/settings_wizard.py

@@ -3,13 +3,14 @@
 from logging import getLogger
 
 from peewee import SqliteDatabase
-from qtpy import QtCore, QtWidgets
+from qtpy import QtCore, QtWidgets, PYSIDE6
 
-from activity_browser import ab_settings
+from activity_browser import ab_settings, actions
 from activity_browser.mod.bw2data import projects
 
 log = getLogger(__name__)
 
+
 class SettingsWizard(QtWidgets.QWizard):
     def __init__(self, parent=None):
         super().__init__(parent)
@@ -107,6 +108,10 @@ def __init__(self, parent=None):
 
         self.layout = QtWidgets.QVBoxLayout()
         self.layout.addWidget(self.startup_groupbox)
+
+        if not PYSIDE6:
+            self.layout.addWidget(PySide6Switch(self))
+
         self.layout.addStretch()
         self.layout.addWidget(self.restore_defaults_button)
         self.setLayout(self.layout)
@@ -304,3 +309,14 @@ def changed(self):
 
     def isComplete(self):
         return self.complete
+
+
+class PySide6Switch(QtWidgets.QGroupBox):
+    def __init__(self, parent=None):
+        super().__init__("Upgrade GUI back-end", parent)
+        self.upgrade_button = actions.PysideUpgrade.get_QButton()
+
+        layout = QtWidgets.QVBoxLayout()
+        layout.addWidget(self.upgrade_button)
+        self.setLayout(layout)
+