adding focus handling to card board

src/logic-scenes/board/card-board.gd

@@ -3,6 +3,16 @@ extends PanelContainer
 var area_dict = {}
 enum ui_context {DROPZONE, POST_IT_LIST, ASSIGN_POST_IT}
 
+var has_focus = false:
+    set(focus):
+        if focus != has_focus:
+            if focus:
+                has_focus = true
+                self.mouse_filter = Control.MOUSE_FILTER_PASS
+            else:
+                has_focus = false
+                self.mouse_filter = Control.MOUSE_FILTER_IGNORE
+
 @onready var dropzone = $HBoxContainer/dropzone
 @onready var postit_container = $HBoxContainer/ScrollContainer/VBoxContainer
 @onready var board_of_devs = $"board of devs"
@@ -31,13 +41,12 @@ func _ready():
 func _process(delta):
     # Reset information about Areas being dragged, if the mouse is not longer pressed.
     # Needed because otherwise it can happen that the areas don't register it if you stop clicking on them.
-    if !Input.is_mouse_button_pressed(MOUSE_BUTTON_LEFT) and is_area_dragged:
+    if has_focus and !Input.is_mouse_button_pressed(MOUSE_BUTTON_LEFT) and is_area_dragged:
         currently_dragged_area.is_dragged = false
         is_area_dragged = false
         currently_dragged_area = null
         
 
-
 # Will be used later to spawn Cards and Post-Its and remember them in the dictionary 
 func populate_board(card_names: Array):
     var all_cards = Array()
@@ -191,7 +200,7 @@ func reorder_areas(reorder: String):
 # Takes the inputs for control inputs
 func _input(event):
     # Return, if the input is a mouse event (mouse events are handled separately)
-    if event is InputEventMouse: return
+    if event is InputEventMouse or !has_focus: return
     
     if event.is_action_pressed("ui_up"):            # up to select an element above
         match active_context: