Improve flight path display options.

Adds an option show only selected flight, and also changes the show
all option to highlight the selected flight.

qt_ui/windows/QLiberationWindow.py

@@ -1,16 +1,16 @@
 import logging
 import sys
 import webbrowser
-from typing import Optional
+from typing import Optional, Union
 
 from PySide2.QtCore import Qt
 from PySide2.QtGui import QIcon
 from PySide2.QtWidgets import (
     QAction,
-    QDesktopWidget,
+    QActionGroup, QDesktopWidget,
     QFileDialog,
     QMainWindow,
-    QMessageBox,
+    QMenu, QMessageBox,
     QSplitter,
     QVBoxLayout,
     QWidget,
@@ -19,7 +19,7 @@ from PySide2.QtWidgets import (
 import qt_ui.uiconstants as CONST
 from game import Game, persistency
 from qt_ui.dialogs import Dialog
-from qt_ui.displayoptions import DisplayOptions
+from qt_ui.displayoptions import DisplayGroup, DisplayOptions, DisplayRule
 from qt_ui.models import GameModel
 from qt_ui.uiconstants import URLS
 from qt_ui.widgets.QTopPanel import QTopPanel
@@ -139,17 +139,19 @@ class QLiberationWindow(QMainWindow):
 
         displayMenu = self.menu.addMenu("&Display")
 
-        for display_rule in DisplayOptions.menu_items():
-            def make_check_closure():
-                def closure():
-                    display_rule.value = action.isChecked()
-                return closure
-
-            action = QAction(f"&{display_rule.menu_text}", displayMenu)
-            action.setCheckable(True)
-            action.setChecked(display_rule.value)
-            action.toggled.connect(make_check_closure())
-            displayMenu.addAction(action)
+        last_was_group = True
+        for item in DisplayOptions.menu_items():
+            if isinstance(item, DisplayRule):
+                displayMenu.addAction(self.make_display_rule_action(item))
+                last_was_group = False
+            elif isinstance(item, DisplayGroup):
+                if not last_was_group:
+                    displayMenu.addSeparator()
+                group = QActionGroup(displayMenu)
+                for display_rule in item:
+                    displayMenu.addAction(
+                        self.make_display_rule_action(display_rule, group))
+                last_was_group = True
 
         help_menu = self.menu.addMenu("&Help")
         help_menu.addAction("&Discord Server", lambda: webbrowser.open_new_tab("https://" + "discord.gg" + "/" + "bKrt" + "rkJ"))
@@ -162,6 +164,21 @@ class QLiberationWindow(QMainWindow):
         help_menu.addSeparator()
         help_menu.addAction(self.showAboutDialogAction)
 
+    @staticmethod
+    def make_display_rule_action(
+            display_rule, group: Optional[QActionGroup] = None) -> QAction:
+        def make_check_closure():
+            def closure():
+                display_rule.value = action.isChecked()
+
+            return closure
+
+        action = QAction(f"&{display_rule.menu_text}", group)
+        action.setCheckable(True)
+        action.setChecked(display_rule.value)
+        action.toggled.connect(make_check_closure())
+        return action
+
     def newGame(self):
         wizard = NewGameWizard(self)
         wizard.show()