Optimized item and background signal handling (#365)

Co-authored-by: Dennis Ploeger <develop@dieploegers.de>
Co-authored-by: dploeger <dploeger@users.noreply.github.com>

addons/escoria-core/game/inputs_manager.gd

@@ -26,6 +26,66 @@ var hover_stack: Array = []
 var hotspot_focused: String = ""
 
 
+# Connect the item signals to the local methods
+func register_inventory_item(item: Node):
+	item.connect(
+		"mouse_left_inventory_item", 
+		self, 
+		"_on_mouse_left_click_inventory_item"
+	)
+	item.connect(
+		"mouse_double_left_inventory_item", 
+		self, 
+		"_on_mouse_double_left_click_inventory_item"
+	)
+	item.connect(
+		"mouse_right_inventory_item", 
+		self,
+		"_on_mouse_right_click_inventory_item"
+	)
+	
+	item.connect(
+		"inventory_item_focused", 
+		self, 
+		"_on_mouse_entered_inventory_item"
+	)
+	item.connect(
+		"inventory_item_unfocused", 
+		self, 
+		"_on_mouse_exited_inventory_item"
+	)
+	
+
+func register_background(background: ESCBackground):
+	background.connect(
+		"left_click_on_bg", 
+		self, 
+		"_on_left_click_on_bg"
+	)
+	background.connect(
+		"right_click_on_bg", 
+		escoria.inputs_manager, 
+		"_on_right_click_on_bg"
+	)
+	background.connect(
+		"double_left_click_on_bg", 
+		escoria.inputs_manager, 
+		"_on_double_left_click_on_bg"
+	)
+	background.connect(
+		"mouse_wheel_up",
+		self,
+		"_on_mousewheel_action",
+		[-1]
+	)
+	background.connect(
+		"mouse_wheel_down",
+		self,
+		"_on_mousewheel_action",
+		[-1]
+	)
+
+
 # Input event handler
 #
 # #### Parameters