Merge pull request #202 from OpenVicProject/nation-management-screens

Basic Nation Management Screen framework

15 files changed, 408 insertions, 9 deletions

diff --git a/game/src/Game/Autoload/Events.gd b/game/src/Game/Autoload/Events.gd
index 4f38f61..091a122 100644
--- a/game/src/Game/Autoload/Events.gd
+++ b/game/src/Game/Autoload/Events.gd
@@ -1,9 +1,11 @@
 ## Events are exclusively for the purpose of handling global signals
 ## This is to reduce "signal bubbling" which is when a signal callback is used to "bubble" the signal callbacks up the scene tree.
-## It does such by providing a global interface of signals that are connected to and emitted by that are garunteed to exist.
+## It does such by providing a global interface of signals that are connected to and emitted by that are guaranteed to exist.
 extends Node
 
-var Options: OptionsEventsObject
+var Options : OptionsEventsObject
+var NationManagementScreens : NationManagementScreensEventsObject
 
 func _init() -> void:
 	Options = OptionsEventsObject.new()
+	NationManagementScreens = NationManagementScreensEventsObject.new()
diff --git a/game/src/Game/Autoload/Events/NationManagementScreens.gd b/game/src/Game/Autoload/Events/NationManagementScreens.gd
new file mode 100644
index 0000000..4bdca6d
--- /dev/null
+++ b/game/src/Game/Autoload/Events/NationManagementScreens.gd
@@ -0,0 +1,25 @@
+class_name NationManagementScreensEventsObject
+extends RefCounted
+
+signal update_active_nation_management_screen(screen : NationManagement.Screen)
+
+var _current_screen : NationManagement.Screen = NationManagement.Screen.NONE
+
+# Set the current nation management screen. This emits an update signal to force
+# the argument screen to update, even if it was already the current screen.
+# Used by miscellaneous screen opening buttons (e.g. in province overview panel)
+# and by the close and toggle functions below.
+func open_nation_management_screen(screen : NationManagement.Screen) -> void:
+	_current_screen = screen
+	update_active_nation_management_screen.emit(_current_screen)
+
+# Close the screen if it is already open. Used for screens' close buttons.
+func close_nation_management_screen(screen : NationManagement.Screen) -> void:
+	if screen == _current_screen:
+		open_nation_management_screen(NationManagement.Screen.NONE)
+
+# Either switch to the screen or close it if it is already open. Used for topbar's buttons.
+func toggle_nation_management_screen(screen : NationManagement.Screen) -> void:
+	if screen == _current_screen:
+		screen = NationManagement.Screen.NONE
+	open_nation_management_screen(screen)
diff --git a/game/src/Game/GameSession/GameSession.tscn b/game/src/Game/GameSession/GameSession.tscn
index c7a8003..d2fc3a3 100644
--- a/game/src/Game/GameSession/GameSession.tscn
+++ b/game/src/Game/GameSession/GameSession.tscn
@@ -1,4 +1,4 @@
-[gd_scene load_steps=10 format=3 uid="uid://bgnupcshe1m7r"]
+[gd_scene load_steps=18 format=3 uid="uid://bgnupcshe1m7r"]
 
 [ext_resource type="Script" path="res://src/Game/GameSession/GameSession.gd" id="1_eklvp"]
 [ext_resource type="PackedScene" uid="uid://cvl76duuym1wq" path="res://src/Game/MusicConductor/MusicPlayer.tscn" id="2_kt6aa"]
@@ -6,9 +6,17 @@
 [ext_resource type="PackedScene" uid="uid://dvdynl6eir40o" path="res://src/Game/GameSession/GameSessionMenu.tscn" id="3_bvmqh"]
 [ext_resource type="Script" path="res://src/Game/GameSession/Topbar.gd" id="4_2kbih"]
 [ext_resource type="PackedScene" uid="uid://dkehmdnuxih2r" path="res://src/Game/GameSession/MapView.tscn" id="4_xkg5j"]
+[ext_resource type="Script" path="res://src/Game/GameSession/NationManagementScreen/ProductionMenu.gd" id="5_16755"]
 [ext_resource type="Script" path="res://src/Game/GameSession/ProvinceOverviewPanel.gd" id="5_lfv8l"]
 [ext_resource type="PackedScene" uid="uid://cnbfxjy1m6wja" path="res://src/Game/Menu/OptionMenu/OptionsMenu.tscn" id="6_p5mnx"]
+[ext_resource type="Script" path="res://src/Game/GameSession/NationManagementScreen/BudgetMenu.gd" id="6_vninv"]
+[ext_resource type="Script" path="res://src/Game/GameSession/NationManagementScreen/TechnologyMenu.gd" id="7_r712c"]
 [ext_resource type="PackedScene" uid="uid://d3g6wbvwflmyk" path="res://src/Game/Menu/SaveLoadMenu/SaveLoadMenu.tscn" id="8_4g7ko"]
+[ext_resource type="Script" path="res://src/Game/GameSession/NationManagementScreen/PoliticsMenu.gd" id="8_ppdek"]
+[ext_resource type="Script" path="res://src/Game/GameSession/NationManagementScreen/PopulationMenu.gd" id="10_laee7"]
+[ext_resource type="Script" path="res://src/Game/GameSession/NationManagementScreen/TradeMenu.gd" id="10_mv1r6"]
+[ext_resource type="Script" path="res://src/Game/GameSession/NationManagementScreen/DiplomacyMenu.gd" id="11_fu7ys"]
+[ext_resource type="Script" path="res://src/Game/GameSession/NationManagementScreen/MilitaryMenu.gd" id="12_6h6nc"]
 
 [node name="GameSession" type="Control" node_paths=PackedStringArray("_game_session_menu")]
 editor_description = "SS-102, UI-546"
@@ -34,6 +42,46 @@ layout_mode = 1
 anchors_preset = 15
 script = ExtResource("4_2kbih")
 
+[node name="ProductionMenu" type="GUINode" parent="Topbar"]
+layout_mode = 1
+anchors_preset = 15
+script = ExtResource("5_16755")
+
+[node name="BudgetMenu" type="GUINode" parent="Topbar"]
+layout_mode = 1
+anchors_preset = 15
+script = ExtResource("6_vninv")
+
+[node name="TechnologyMenu" type="GUINode" parent="Topbar"]
+layout_mode = 1
+anchors_preset = 15
+script = ExtResource("7_r712c")
+
+[node name="PoliticsMenu" type="GUINode" parent="Topbar"]
+layout_mode = 1
+anchors_preset = 15
+script = ExtResource("8_ppdek")
+
+[node name="PopulationMenu" type="GUINode" parent="Topbar"]
+layout_mode = 1
+anchors_preset = 15
+script = ExtResource("10_laee7")
+
+[node name="TradeMenu" type="GUINode" parent="Topbar"]
+layout_mode = 1
+anchors_preset = 15
+script = ExtResource("10_mv1r6")
+
+[node name="DiplomacyMenu" type="GUINode" parent="Topbar"]
+layout_mode = 1
+anchors_preset = 15
+script = ExtResource("11_fu7ys")
+
+[node name="MilitaryMenu" type="GUINode" parent="Topbar"]
+layout_mode = 1
+anchors_preset = 15
+script = ExtResource("12_6h6nc")
+
 [node name="MapControlPanel" parent="." instance=ExtResource("3_afh6d")]
 layout_mode = 1
 anchors_preset = 3
diff --git a/game/src/Game/GameSession/NationManagementScreen/BudgetMenu.gd b/game/src/Game/GameSession/NationManagementScreen/BudgetMenu.gd
new file mode 100644
index 0000000..7158333
--- /dev/null
+++ b/game/src/Game/GameSession/NationManagementScreen/BudgetMenu.gd
@@ -0,0 +1,34 @@
+extends GUINode
+
+var _active : bool = false
+
+const _screen : NationManagement.Screen = NationManagement.Screen.BUDGET
+
+func _ready() -> void:
+	GameSingleton.gamestate_updated.connect(_update_info)
+
+	Events.NationManagementScreens.update_active_nation_management_screen.connect(_on_update_active_nation_management_screen)
+
+	add_gui_element("country_budget", "country_budget")
+
+	var close_button : Button = get_button_from_nodepath(^"./country_budget/close_button")
+	if close_button:
+		close_button.pressed.connect(Events.NationManagementScreens.close_nation_management_screen.bind(_screen))
+
+	_update_info()
+
+func _notification(what : int) -> void:
+	match what:
+		NOTIFICATION_TRANSLATION_CHANGED:
+			_update_info()
+
+func _on_update_active_nation_management_screen(active_screen : NationManagement.Screen) -> void:
+	_active = active_screen == _screen
+	_update_info()
+
+func _update_info() -> void:
+	if _active:
+		# TODO - update UI state
+		show()
+	else:
+		hide()
diff --git a/game/src/Game/GameSession/NationManagementScreen/DiplomacyMenu.gd b/game/src/Game/GameSession/NationManagementScreen/DiplomacyMenu.gd
new file mode 100644
index 0000000..fb11a31
--- /dev/null
+++ b/game/src/Game/GameSession/NationManagementScreen/DiplomacyMenu.gd
@@ -0,0 +1,34 @@
+extends GUINode
+
+var _active : bool = false
+
+const _screen : NationManagement.Screen = NationManagement.Screen.DIPLOMACY
+
+func _ready() -> void:
+	GameSingleton.gamestate_updated.connect(_update_info)
+
+	Events.NationManagementScreens.update_active_nation_management_screen.connect(_on_update_active_nation_management_screen)
+
+	add_gui_element("country_diplomacy", "country_diplomacy")
+
+	var close_button : Button = get_button_from_nodepath(^"./country_diplomacy/close_button")
+	if close_button:
+		close_button.pressed.connect(Events.NationManagementScreens.close_nation_management_screen.bind(_screen))
+
+	_update_info()
+
+func _notification(what : int) -> void:
+	match what:
+		NOTIFICATION_TRANSLATION_CHANGED:
+			_update_info()
+
+func _on_update_active_nation_management_screen(active_screen : NationManagement.Screen) -> void:
+	_active = active_screen == _screen
+	_update_info()
+
+func _update_info() -> void:
+	if _active:
+		# TODO - update UI state
+		show()
+	else:
+		hide()
diff --git a/game/src/Game/GameSession/NationManagementScreen/MilitaryMenu.gd b/game/src/Game/GameSession/NationManagementScreen/MilitaryMenu.gd
new file mode 100644
index 0000000..f3cc486
--- /dev/null
+++ b/game/src/Game/GameSession/NationManagementScreen/MilitaryMenu.gd
@@ -0,0 +1,34 @@
+extends GUINode
+
+var _active : bool = false
+
+const _screen : NationManagement.Screen = NationManagement.Screen.MILITARY
+
+func _ready() -> void:
+	GameSingleton.gamestate_updated.connect(_update_info)
+
+	Events.NationManagementScreens.update_active_nation_management_screen.connect(_on_update_active_nation_management_screen)
+
+	add_gui_element("country_military", "country_military")
+
+	var close_button : Button = get_button_from_nodepath(^"./country_military/close_button")
+	if close_button:
+		close_button.pressed.connect(Events.NationManagementScreens.close_nation_management_screen.bind(_screen))
+
+	_update_info()
+
+func _notification(what : int) -> void:
+	match what:
+		NOTIFICATION_TRANSLATION_CHANGED:
+			_update_info()
+
+func _on_update_active_nation_management_screen(active_screen : NationManagement.Screen) -> void:
+	_active = active_screen == _screen
+	_update_info()
+
+func _update_info() -> void:
+	if _active:
+		# TODO - update UI state
+		show()
+	else:
+		hide()
diff --git a/game/src/Game/GameSession/NationManagementScreen/PoliticsMenu.gd b/game/src/Game/GameSession/NationManagementScreen/PoliticsMenu.gd
new file mode 100644
index 0000000..7237bf5
--- /dev/null
+++ b/game/src/Game/GameSession/NationManagementScreen/PoliticsMenu.gd
@@ -0,0 +1,34 @@
+extends GUINode
+
+var _active : bool = false
+
+const _screen : NationManagement.Screen = NationManagement.Screen.POLITICS
+
+func _ready() -> void:
+	GameSingleton.gamestate_updated.connect(_update_info)
+
+	Events.NationManagementScreens.update_active_nation_management_screen.connect(_on_update_active_nation_management_screen)
+
+	add_gui_element("country_politics", "country_politics")
+
+	var close_button : Button = get_button_from_nodepath(^"./country_politics/close_button")
+	if close_button:
+		close_button.pressed.connect(Events.NationManagementScreens.close_nation_management_screen.bind(_screen))
+
+	_update_info()
+
+func _notification(what : int) -> void:
+	match what:
+		NOTIFICATION_TRANSLATION_CHANGED:
+			_update_info()
+
+func _on_update_active_nation_management_screen(active_screen : NationManagement.Screen) -> void:
+	_active = active_screen == _screen
+	_update_info()
+
+func _update_info() -> void:
+	if _active:
+		# TODO - update UI state
+		show()
+	else:
+		hide()
diff --git a/game/src/Game/GameSession/NationManagementScreen/PopulationMenu.gd b/game/src/Game/GameSession/NationManagementScreen/PopulationMenu.gd
new file mode 100644
index 0000000..29bd56b
--- /dev/null
+++ b/game/src/Game/GameSession/NationManagementScreen/PopulationMenu.gd
@@ -0,0 +1,34 @@
+extends GUINode
+
+var _active : bool = false
+
+const _screen : NationManagement.Screen = NationManagement.Screen.POPULATION
+
+func _ready() -> void:
+	GameSingleton.gamestate_updated.connect(_update_info)
+
+	Events.NationManagementScreens.update_active_nation_management_screen.connect(_on_update_active_nation_management_screen)
+
+	add_gui_element("country_pops", "country_pop")
+
+	var close_button : Button = get_button_from_nodepath(^"./country_pop/close_button")
+	if close_button:
+		close_button.pressed.connect(Events.NationManagementScreens.close_nation_management_screen.bind(_screen))
+
+	_update_info()
+
+func _notification(what : int) -> void:
+	match what:
+		NOTIFICATION_TRANSLATION_CHANGED:
+			_update_info()
+
+func _on_update_active_nation_management_screen(active_screen : NationManagement.Screen) -> void:
+	_active = active_screen == _screen
+	_update_info()
+
+func _update_info() -> void:
+	if _active:
+		# TODO - update UI state
+		show()
+	else:
+		hide()
diff --git a/game/src/Game/GameSession/NationManagementScreen/ProductionMenu.gd b/game/src/Game/GameSession/NationManagementScreen/ProductionMenu.gd
new file mode 100644
index 0000000..938f8e7
--- /dev/null
+++ b/game/src/Game/GameSession/NationManagementScreen/ProductionMenu.gd
@@ -0,0 +1,34 @@
+extends GUINode
+
+var _active : bool = false
+
+const _screen : NationManagement.Screen = NationManagement.Screen.PRODUCTION
+
+func _ready() -> void:
+	GameSingleton.gamestate_updated.connect(_update_info)
+
+	Events.NationManagementScreens.update_active_nation_management_screen.connect(_on_update_active_nation_management_screen)
+
+	add_gui_element("country_production", "country_production")
+
+	var close_button : Button = get_button_from_nodepath(^"./country_production/close_button")
+	if close_button:
+		close_button.pressed.connect(Events.NationManagementScreens.close_nation_management_screen.bind(_screen))
+
+	_update_info()
+
+func _notification(what : int) -> void:
+	match what:
+		NOTIFICATION_TRANSLATION_CHANGED:
+			_update_info()
+
+func _on_update_active_nation_management_screen(active_screen : NationManagement.Screen) -> void:
+	_active = active_screen == _screen
+	_update_info()
+
+func _update_info() -> void:
+	if _active:
+		# TODO - update UI state
+		show()
+	else:
+		hide()
diff --git a/game/src/Game/GameSession/NationManagementScreen/TechnologyMenu.gd b/game/src/Game/GameSession/NationManagementScreen/TechnologyMenu.gd
new file mode 100644
index 0000000..a80ed1e
--- /dev/null
+++ b/game/src/Game/GameSession/NationManagementScreen/TechnologyMenu.gd
@@ -0,0 +1,34 @@
+extends GUINode
+
+var _active : bool = false
+
+const _screen : NationManagement.Screen = NationManagement.Screen.TECHNOLOGY
+
+func _ready() -> void:
+	GameSingleton.gamestate_updated.connect(_update_info)
+
+	Events.NationManagementScreens.update_active_nation_management_screen.connect(_on_update_active_nation_management_screen)
+
+	add_gui_element("country_technology", "country_technology")
+
+	var close_button : Button = get_button_from_nodepath(^"./country_technology/close_button")
+	if close_button:
+		close_button.pressed.connect(Events.NationManagementScreens.close_nation_management_screen.bind(_screen))
+
+	_update_info()
+
+func _notification(what : int) -> void:
+	match what:
+		NOTIFICATION_TRANSLATION_CHANGED:
+			_update_info()
+
+func _on_update_active_nation_management_screen(active_screen : NationManagement.Screen) -> void:
+	_active = active_screen == _screen
+	_update_info()
+
+func _update_info() -> void:
+	if _active:
+		# TODO - update UI state
+		show()
+	else:
+		hide()
diff --git a/game/src/Game/GameSession/NationManagementScreen/TradeMenu.gd b/game/src/Game/GameSession/NationManagementScreen/TradeMenu.gd
new file mode 100644
index 0000000..775f31a
--- /dev/null
+++ b/game/src/Game/GameSession/NationManagementScreen/TradeMenu.gd
@@ -0,0 +1,34 @@
+extends GUINode
+
+var _active : bool = false
+
+const _screen : NationManagement.Screen = NationManagement.Screen.TRADE
+
+func _ready() -> void:
+	GameSingleton.gamestate_updated.connect(_update_info)
+
+	Events.NationManagementScreens.update_active_nation_management_screen.connect(_on_update_active_nation_management_screen)
+
+	add_gui_element("country_trade", "country_trade")
+
+	var close_button : Button = get_button_from_nodepath(^"./country_trade/close_button")
+	if close_button:
+		close_button.pressed.connect(Events.NationManagementScreens.close_nation_management_screen.bind(_screen))
+
+	_update_info()
+
+func _notification(what : int) -> void:
+	match what:
+		NOTIFICATION_TRANSLATION_CHANGED:
+			_update_info()
+
+func _on_update_active_nation_management_screen(active_screen : NationManagement.Screen) -> void:
+	_active = active_screen == _screen
+	_update_info()
+
+func _update_info() -> void:
+	if _active:
+		# TODO - update UI state
+		show()
+	else:
+		hide()
diff --git a/game/src/Game/GameSession/ProvinceOverviewPanel.gd b/game/src/Game/GameSession/ProvinceOverviewPanel.gd
index 6fe28d7..cb76241 100644
--- a/game/src/Game/GameSession/ProvinceOverviewPanel.gd
+++ b/game/src/Game/GameSession/ProvinceOverviewPanel.gd
@@ -121,7 +121,7 @@ func _ready() -> void:
 	GameSingleton.province_selected.connect(_on_province_selected)
 	GameSingleton.gamestate_updated.connect(_update_info)
 
-	if add_gui_element("province_interface.gui", "province_view") != OK:
+	if add_gui_element("province_interface", "province_view") != OK:
 		push_error("Failed to generate province overview panel!")
 		return
 
@@ -144,7 +144,7 @@ func _ready() -> void:
 	_administrative_percentage_label = get_label_from_nodepath(^"./province_view/province_view_header/admin_efficiency")
 	_owner_percentage_label = get_label_from_nodepath(^"./province_view/province_view_header/owner_presence")
 	_province_modifiers_overlapping_elements_box = get_gui_overlapping_elements_box_from_nodepath(^"./province_view/province_view_header/province_modifiers")
-	if _province_modifiers_overlapping_elements_box and _province_modifiers_overlapping_elements_box.set_gui_child_element_name("province_interface.gui", "prov_state_modifier") != OK:
+	if _province_modifiers_overlapping_elements_box and _province_modifiers_overlapping_elements_box.set_gui_child_element_name("province_interface", "prov_state_modifier") != OK:
 		_province_modifiers_overlapping_elements_box = null # hide province modifiers box since we can't do anything with it
 	_terrain_type_texture = get_gfx_icon_texture_from_nodepath(^"./province_view/province_view_header/prov_terrain")
 	_life_rating_bar = get_progress_bar_from_nodepath(^"./province_view/province_view_header/liferating")
@@ -168,7 +168,7 @@ func _ready() -> void:
 	_pop_cultures_piechart = get_gfx_pie_chart_texture_from_nodepath(^"./province_view/province_statistics/culture_chart")
 	_supply_limit_label = get_label_from_nodepath(^"./province_view/province_statistics/supply_limit_label")
 	_cores_overlapping_elements_box = get_gui_overlapping_elements_box_from_nodepath(^"./province_view/province_statistics/core_icons")
-	if _cores_overlapping_elements_box and _cores_overlapping_elements_box.set_gui_child_element_name("province_interface.gui", "province_core") != OK:
+	if _cores_overlapping_elements_box and _cores_overlapping_elements_box.set_gui_child_element_name("province_interface", "province_core") != OK:
 		_cores_overlapping_elements_box = null # hide cores box since we can't do anything with it
 
 	_buildings_panel = get_panel_from_nodepath(^"./province_view/province_buildings")
@@ -176,7 +176,7 @@ func _ready() -> void:
 		var target_slot_count : int = GameSingleton.get_province_building_count()
 		var slot_y : float = 0.0
 		for current_slot_count : int in target_slot_count:
-			var slot := GUINode.generate_gui_element("province_interface.gui", "building", "building_slot_%d" % current_slot_count)
+			var slot := GUINode.generate_gui_element("province_interface", "building", "building_slot_%d" % current_slot_count)
 			if slot:
 				_buildings_panel.add_child(slot)
 				slot.set_position(Vector2(0.0, slot_y))
diff --git a/game/src/Game/GameSession/Topbar.gd b/game/src/Game/GameSession/Topbar.gd
index 05eb985..3cfc0e6 100644
--- a/game/src/Game/GameSession/Topbar.gd
+++ b/game/src/Game/GameSession/Topbar.gd
@@ -1,5 +1,7 @@
 extends GUINode
 
+@export var _outliner_guinode : GUINode
+
 var _speed_up_button : Button
 var _speed_down_button : Button
 var _speed_indicator_button : Button
@@ -7,11 +9,16 @@ var _speed_indicator_texture : GFXIconTexture
 var _date_label : Label
 var _country_name_label : Label
 
+# NationManagement.Screen-Button
+var _nation_management_buttons : Dictionary
+# NationManagement.Screen-GFXIconTexture
+var _nation_management_button_textures : Dictionary
+
 func _ready() -> void:
 	GameSingleton.gamestate_updated.connect(_update_info)
 	GameSingleton.clock_state_changed.connect(_update_speed_controls)
 
-	add_gui_element("topbar.gui", "topbar")
+	add_gui_element("topbar", "topbar")
 
 	hide_nodes([
 		^"./topbar/topbar_outlinerbutton_bg",
@@ -20,10 +27,12 @@ func _ready() -> void:
 
 	const player_country : String = "SLV"
 
+	# Player country info
 	var player_flag_texture : GFXMaskedFlagTexture = get_gfx_masked_flag_texture_from_nodepath(^"./topbar/player_flag")
 	if player_flag_texture:
 		player_flag_texture.set_flag_country_name(player_country)
 
+	# Time controls
 	_speed_up_button = get_button_from_nodepath(^"./topbar/button_speedup")
 	if _speed_up_button:
 		_speed_up_button.pressed.connect(_on_increase_speed_button_pressed)
@@ -47,6 +56,31 @@ func _ready() -> void:
 		_speed_indicator_button.pressed.connect(_on_play_pause_button_pressed)
 		_speed_indicator_texture = GUINode.get_gfx_icon_texture_from_node(_speed_indicator_button)
 
+	# Nation management screens
+	const screen_nodepaths : Dictionary = {
+		NationManagement.Screen.PRODUCTION : ^"./topbar/topbarbutton_production",
+		NationManagement.Screen.BUDGET     : ^"./topbar/topbarbutton_budget",
+		NationManagement.Screen.TECHNOLOGY : ^"./topbar/topbarbutton_tech",
+		NationManagement.Screen.POLITICS   : ^"./topbar/topbarbutton_politics",
+		NationManagement.Screen.POPULATION : ^"./topbar/topbarbutton_pops",
+		NationManagement.Screen.TRADE      : ^"./topbar/topbarbutton_trade",
+		NationManagement.Screen.DIPLOMACY  : ^"./topbar/topbarbutton_diplomacy",
+		NationManagement.Screen.MILITARY   : ^"./topbar/topbarbutton_military"
+	}
+	for screen in screen_nodepaths:
+		var button : Button = get_button_from_nodepath(screen_nodepaths[screen])
+		if button:
+			button.pressed.connect(
+				Events.NationManagementScreens.toggle_nation_management_screen.bind(screen)
+			)
+			var icon : GFXIconTexture = get_gfx_icon_texture_from_node(button)
+			if icon:
+				_nation_management_buttons[screen] = button
+				_nation_management_button_textures[screen] = icon
+	Events.NationManagementScreens.update_active_nation_management_screen.connect(
+		_on_update_active_nation_management_screen
+	)
+
 	_update_info()
 	_update_speed_controls()
 
@@ -92,3 +126,8 @@ func _on_increase_speed_button_pressed() -> void:
 func _on_decrease_speed_button_pressed() -> void:
 	print("Speed down!")
 	GameSingleton.decrease_speed()
+
+func _on_update_active_nation_management_screen(active_screen : NationManagement.Screen) -> void:
+	for screen in _nation_management_buttons:
+		_nation_management_button_textures[screen].set_icon_index(1 + int(screen == active_screen))
+		_nation_management_buttons[screen].queue_redraw()
diff --git a/game/src/Game/GameStart.gd b/game/src/Game/GameStart.gd
index 7a52846..0aadbb9 100644
--- a/game/src/Game/GameStart.gd
+++ b/game/src/Game/GameStart.gd
@@ -48,7 +48,7 @@ func _save_setting(file : ConfigFile) -> void:
 
 func _setup_compatibility_mode_paths() -> void:
 	# To test mods, set your base path to Victoria II and then pass mods in reverse order with --mod="mod" for each mod.
-	
+
 	var arg_base_path : String = ArgumentParser.get_argument(&"base-path", "")
 	var arg_search_path : String = ArgumentParser.get_argument(&"search-path", "")
 
diff --git a/game/src/Game/GlobalClass/NationManagement.gd b/game/src/Game/GlobalClass/NationManagement.gd
new file mode 100644
index 0000000..3b73bde
--- /dev/null
+++ b/game/src/Game/GlobalClass/NationManagement.gd
@@ -0,0 +1,13 @@
+class_name NationManagement
+
+enum Screen {
+	NONE,
+	PRODUCTION,
+	BUDGET,
+	TECHNOLOGY,
+	POLITICS,
+	POPULATION,
+	TRADE,
+	DIPLOMACY,
+	MILITARY
+}