Add cheat options back to front lines.

Fixes https://github.com/dcs-liberation/dcs_liberation/issues/1108.

qt_ui/windows/basemenu/ground_forces/QGroundForcesStrategy.py

@@ -1,7 +1,10 @@
-from PySide2.QtWidgets import QGroupBox, QLabel, QVBoxLayout
+from collections import Callable
+
+from PySide2.QtWidgets import QGroupBox, QLabel, QVBoxLayout, QPushButton
 
 from game import Game
 from game.theater import ControlPoint
+from qt_ui.windows.GameUpdateSignal import GameUpdateSignal
 from qt_ui.windows.basemenu.ground_forces.QGroundForcesStrategySelector import (
     QGroundForcesStrategySelector,
 )
@@ -15,10 +18,44 @@ class QGroundForcesStrategy(QGroupBox):
         self.init_ui()
 
     def init_ui(self):
+        def make_cheat_callback(
+            enemy_point: ControlPoint, advance: bool
+        ) -> Callable[[], None]:
+            def cheat() -> None:
+                self.cheat_alter_front_line(enemy_point, advance)
+
+            return cheat
+
         layout = QVBoxLayout()
         for enemy_cp in self.cp.connected_points:
             if not enemy_cp.captured:
                 layout.addWidget(QLabel(enemy_cp.name))
                 layout.addWidget(QGroundForcesStrategySelector(self.cp, enemy_cp))
+                if self.game.settings.enable_frontline_cheats:
+                    advance_button = QPushButton("CHEAT: Advance")
+                    advance_button.setProperty("style", "btn-danger")
+                    layout.addWidget(advance_button)
+                    advance_button.clicked.connect(
+                        make_cheat_callback(enemy_cp, advance=True)
+                    )
+
+                    retreat_button = QPushButton("CHEAT: Retreat")
+                    retreat_button.setProperty("style", "btn-danger")
+                    layout.addWidget(retreat_button)
+                    retreat_button.clicked.connect(
+                        make_cheat_callback(enemy_cp, advance=False)
+                    )
+
         layout.addStretch()
         self.setLayout(layout)
+
+    def cheat_alter_front_line(self, enemy_point: ControlPoint, advance: bool) -> None:
+        amount = 0.2
+        if not advance:
+            amount *= -1
+        self.cp.base.affect_strength(amount)
+        enemy_point.base.affect_strength(-amount)
+        # Clear the ATO to replan missions affected by the front line.
+        self.game.reset_ato()
+        self.game.initialize_turn()
+        GameUpdateSignal.get_instance().updateGame(self.game)