fix #162 catch input events when they have been processed by the board

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

@@ -329,17 +329,19 @@ func insert_area(parent: Control, node: Area2D):
 # Takes the inputs for control inputs
 func _input(event):
 	
-	if event.is_action_pressed("ui_cancel"):
-		State.leave_stage(self)
-	
 	# Return, if the input is a mouse event (mouse events are handled separately)
 	if not has_stage or not is_instance_valid(currently_active_node): return
 
+	if event.is_action_pressed("ui_cancel"):
+		State.leave_stage(self)
+		get_viewport().set_input_as_handled()
+	
 		if event is InputEventMouse:
 		# makes sure to pass release events so notes do not get attached to the mouse while the cursor leaves the area.
 		if event is InputEventMouseButton and current_context == DRAG:
 			if event.button_index == MOUSE_BUTTON_LEFT and not event.pressed:
 				handle_mouse_button(event)
+				get_viewport().set_input_as_handled()
 		else:
 			return
 
@@ -349,12 +351,14 @@ func _input(event):
 				current_sticky_note_id -= 1
 			else:
 				current_dropzone_id -= 1
+			get_viewport().set_input_as_handled()
 	
 		elif event.is_action_pressed("ui_down"):       # down to select an element beneath
 			if focus_stickies:
 				current_sticky_note_id += 1
 			else:
 				current_dropzone_id += 1
+			get_viewport().set_input_as_handled()
 			
 		elif event.is_action_pressed("ui_right"):        # left to switch context to the left
 			if not focus_stickies:
@@ -362,6 +366,7 @@ func _input(event):
 					focus_stickies = true
 				elif current_context == ASSIGN:
 					current_context = NAVIGATE
+				get_viewport().set_input_as_handled()
 			
 		elif event.is_action_pressed("ui_left"):       # right to switch context to the right
 			if focus_stickies:
@@ -369,6 +374,7 @@ func _input(event):
 					focus_stickies = false
 				elif current_context == ASSIGN:
 					current_context = NAVIGATE
+				get_viewport().set_input_as_handled()
 			
 		elif event.is_action_pressed("ui_accept"):              # select the selected note it
 			if dropzone.get_child(current_dropzone_id) is Card:
@@ -404,6 +410,7 @@ func _input(event):
 					current_dropzone_id += 1
 					currently_active_node.is_dragable = false
 					currently_active_node.z_index = 1
+			get_viewport().set_input_as_handled()
 
 # move the note it so it floats next to the card where it should be attached
 func _select_card_for_assigning(sticky_note: Area2D, card: Area2D):