added toggling of grid with control-g

data/translations/english.cfg

@@ -78,6 +78,11 @@ language="English"
 	key=e
 	alt=yes
 	[/hotkey]
+	[hotkey]
+	command=togglegrid
+	key=g
+	ctrl=yes
+	[/hotkey]
 
 game_title="The Battle for Wesnoth"
 version="Version"

src/hotkeys.cpp

@@ -48,6 +48,7 @@ HOTKEY_COMMAND string_to_command(const std::string& str)
 		m.insert(val("recruit",HOTKEY_RECRUIT));
 		m.insert(val("recall",HOTKEY_RECALL));
 		m.insert(val("endturn",HOTKEY_ENDTURN));
+		m.insert(val("togglegrid",HOTKEY_TOGGLE_GRID));
 	}
 
 	const std::map<std::string,HOTKEY_COMMAND>::const_iterator i = m.find(str);

src/hotkeys.hpp

@@ -24,6 +24,7 @@ enum HOTKEY_COMMAND { HOTKEY_CYCLE_UNITS, HOTKEY_END_UNIT_TURN, HOTKEY_LEADER,
                       HOTKEY_TERRAIN_TABLE, HOTKEY_ATTACK_RESISTANCE,
                       HOTKEY_UNIT_DESCRIPTION, HOTKEY_SAVE_GAME,
                       HOTKEY_RECRUIT, HOTKEY_RECALL, HOTKEY_ENDTURN,
+                      HOTKEY_TOGGLE_GRID,
                       HOTKEY_NULL };
 
 void add_hotkeys(config& cfg);

src/playturn.cpp

@@ -978,6 +978,11 @@ bool turn_slice(game_data& gameinfo, game_state& state_of_game,
 		}
 	}
 
+	if(command == HOTKEY_TOGGLE_GRID) {
+		preferences::set_grid(!preferences::grid());
+		gui.invalidate_all();
+	}
+
 	//undo
 	if(!browse && command == HOTKEY_UNDO && !undo_stack.empty()) {
 		const int starting_moves = undo_stack.back().starting_moves;