fix: card-board uses more single-responsibility, and now allows cards to slide nicely into the gaps

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

@@ -89,16 +89,28 @@ func _smooth(current: Vector2, goal: Vector2, delta: float) -> Vector2:
 func _process(delta: float):
 	var zone_position := Vector2(notezone.get_screen_position().x + sticky_width / 3.0, sticky_height)
 
+	var dragging := notes.any(func (n : Draggable): return n.is_dragged)
+
+	if dragging:
+		# Y-sort the nodes, this lets us fill the gap more nicely.
+		notes.sort_custom(func (a:Draggable, b:Draggable): return a.global_position.y < b.global_position.y)
+
 	for note in notes:
 		# Skip all dragged and already attached notes
 		if note.is_attached: continue
 		if note.is_dragged: continue
 
 		# Magnetically move all notes to where they ought to be on screen
-		note.position = _smooth(note.position, zone_position, delta)
+		note.home = zone_position
 		zone_position.y += sticky_height
 
-	pass
+		# Only if not already in transit / animated or user holding on to one
+		if not dragging and not note.tween:
+			note.animate_home()
+		else:
+			# do adjustment with FIR filter
+			note.position = _smooth(note.position, note.home, delta)
+
 
 
 func _check_completion() -> void:
@@ -195,7 +207,7 @@ func add_card(card: Card) -> void:
 func add_note(note: StickyNote) -> void:
 	add_child(note)
 	notes.append(note)
-	note.is_dragable = true
+	note.is_draggable = true
 
 func appear():
 	await Main.curtain.close()
@@ -250,30 +262,15 @@ func _end_drag(draggable: Draggable) -> void:
 		if destination and destination is Card:
 			var target_card := destination as Card
 
-			# If sticky was previously attached to a different card, detach it first
 			if sticky.is_attached and sticky.attached_to != target_card:
-				sticky.attached_to.remove_sticky_note()
+				sticky.attached_to.remove_note_if_present()
 
-			# If target card already has a sticky, exchange them
+			target_card.attach_or_exchange_note(sticky)
-			if target_card.has_sticky_note_attached():
-				var exchanged_sticky := target_card.exchange_sticky_note_with(sticky)
-				# Reclaim the exchanged sticky to the board
-				if exchanged_sticky:
-					reclaim_sticky(exchanged_sticky)
-			else:
-				# Simple attach
-				sticky.reparent(target_card)
-				target_card.attach_sticky_note(sticky)
 
 		# If dropped on board (no destination), ensure it's a child of the board
 		elif not destination:
-			# If it was attached to a card, detach it first
 			if sticky.is_attached:
-				sticky.attached_to.remove_sticky_note()
+				reclaim_sticky(sticky)
-
-			# Make sure sticky is parented to board
-			if sticky.get_parent() != self:
-				sticky.reparent(self)
 
 		# Check win condition after any sticky movement
 		check_board_completion()
@@ -281,6 +278,7 @@ func _end_drag(draggable: Draggable) -> void:
 
 func reclaim_sticky(note: StickyNote):
 	note.reparent(self)
+	note.tween = null
 
 
 func check_board_completion():
@@ -305,8 +303,8 @@ func give_lore_feedback():
 
 	for child in dropzone.get_children():
 		if child is Card:
-			if child.has_sticky_note_attached():
+			if child.has_note_attached():
-				fitting_card_count += int(child.card_id == child.get_attached_sticky_note().parent_id)
+				fitting_card_count += int(child.card_id == child.get_attached_note().parent_id)
 			total_card_count += 1
 
 	if float(fitting_card_count) / float(total_card_count) < 0.2:
@@ -421,7 +419,7 @@ func save_to_resource(savegame: SaveGame) -> void:
 		print_debug("  Card '%s' at %s" % [card.name, card.position])
 
 		# Save sticky note attachment if present
-		var note: StickyNote = card.get_attached_sticky_note()
+		var note: StickyNote = card.get_attached_note()
 		if note:
 			savegame.board_attachments[note.name] = card.name
 			print_debug("  Sticky '%s' attached to card '%s'" % [note.name, card.name])
@@ -496,8 +494,7 @@ func initialise_from_save(savegame: SaveGame) -> void:
 		if card_name and cards_by_name.has(card_name):
 			# Sticky is attached to a card
 			var card: Card = cards_by_name[card_name]
-			sticky.reparent(card)
+			card.attach_or_exchange_note(sticky, true)
-			card.attach_sticky_note(sticky)
 			print_debug("  Sticky '%s' attached to card '%s'" % [sticky.name, card_name])
 		else:
 			# Sticky is loose on the board

src/logic-scenes/board/card.gd

@@ -203,10 +203,10 @@ func _move_card():
 	if is_dragged:
 		update_drag_position(get_viewport().get_mouse_position())
 
-func has_sticky_note_attached() -> bool:
+func has_note_attached() -> bool:
-	return get_attached_sticky_note() != null
+	return get_attached_note() != null
 
-func get_attached_sticky_note() -> StickyNote:
+func get_attached_note() -> StickyNote:
 	for child in get_children(false):
 		if child is StickyNote:
 			return child
@@ -224,41 +224,40 @@ func preview_sticky_note(sticky_note: StickyNote):
 	else:
 		push_warning("Card.preview_sticky_note: Invalid position calculated, skipping tween")
 
-func attach_sticky_note(sticky_note: StickyNote) -> bool:
-	if has_sticky_note_attached():
-		return false
 
-	sticky_note.reparent(self)
+func attach_or_exchange_note(note: StickyNote, instant: bool = false) -> void:
-	sticky_note.position = sticky_note_position
+	prints("Attaching", note, "to", self)
-	sticky_note.is_dragable = false
 
-	if name == "c_hit" and sticky_note.name == "c_effort" and Steamworks.has_initialized:
+	# Out with the old...
+	remove_note_if_present()
+
+	# ... in with the new
+	note.reparent(self)
+	note.home = sticky_note_position
+
+	if not instant:
+		note.animate_home()
+	else:
+		note.position = sticky_note_position
+
+	if name == "c_hit" and note.name == "c_effort" and Steamworks.has_initialized:
 		Steam.setAchievement("FIGHT_FOR_GOOD")
 		Steam.storeStats()
 
-	return true
 
-func remove_sticky_note() -> StickyNote:
+func remove_note_if_present() -> void:
-	var former_child: StickyNote = get_attached_sticky_note()
+	var former_child: StickyNote = get_attached_note()
-	if not former_child:
+	if not former_child: return
-		return null
+
 	former_child.reparent(get_parent())
-	return former_child
+	former_child.tween = null # the positioning logic in card-board will pick that one up and calc a nice slot.
-
-func exchange_sticky_note_with(new_note: StickyNote) -> StickyNote:
-	if new_note == get_attached_sticky_note():
-		return null
-
-	var old_note := remove_sticky_note()
-	attach_sticky_note(new_note)
-	return old_note
 
 
 # === DROP TARGET PATTERN IMPLEMENTATION ===
 
 ## Checks if this card can accept the given draggable
 func can_accept_drop(draggable: Draggable) -> bool:
-	return draggable is StickyNote and draggable != self
+	return draggable is StickyNote
 
 ## Handles dropping a sticky note onto this card
 ## Returns DropResult indicating success, rejection, or exchange
@@ -266,22 +265,9 @@ func handle_drop(draggable: StickyNote) -> int:
 	if not can_accept_drop(draggable):
 		return Draggable.DropResult.REJECTED
 
-	if has_sticky_note_attached():
+	attach_or_exchange_note(draggable)
-		# Exchange: remove current, attach new, store old for retrieval
-		exchange_sticky_note_with(draggable)
-		# Reset z_index for newly attached sticky
 	draggable.z_index = 0
 	return Draggable.DropResult.ACCEPTED
-	else:
-		# Simple attach
-		if attach_sticky_note(draggable):
-			# Reset z_index for newly attached sticky
-			draggable.z_index = 0
-			return Draggable.DropResult.ACCEPTED
-		else:
-			# Attach failed (shouldn't happen, but handle it)
-			return Draggable.DropResult.REJECTED
-
 
 # === DRAG LIFECYCLE OVERRIDES ===
 

src/logic-scenes/board/draggable.gd

@@ -20,6 +20,9 @@ var is_dragged: bool = false:
 		is_dragged = dragged
 		z_index = int(dragged)
 
+# local coordinates home position, where the draggable can try to animate_home to
+var home : Vector2 = Vector2.ZERO
+
 ## Internal highlighted state - do not set directly, use set_highlight()
 var _highlighted: bool = false
 
@@ -63,6 +66,13 @@ func _get_board() -> Node:
 
 ## === DRAG LIFECYCLE METHODS ===
 ## Override these in Card and StickyNote for specific behavior
+var tween : Tween = null
+
+
+func animate_home() -> void:
+	if tween: tween.kill()
+	tween = create_tween().set_ease(Tween.EASE_IN_OUT).set_trans(Tween.TRANS_BACK)
+	tween.tween_property(self, "position", home, 0.5)
 
 func _on_mouse_entered() -> void:
 	#prints("Draggable[base]._on_mouse_entered", self, self.name)

src/logic-scenes/board/sticky-note.gd

@@ -58,19 +58,13 @@ func set_highlight(value: bool) -> void:
 			shift_tween.tween_property(content, "position", Vector2.ZERO, 0.5)
 
 @export var voice_line: AudioStream = null
-@export var is_dragable: bool = false
+@export var is_draggable: bool = false
 
 var mouse_offset: Vector2
 
 @onready var diameter := 312.0
 @export_range(1.0, 10.0) var bounce_speed: float = 8
 
-## Computed property: Check if on the board (dropzone)
-## Replaces on_board state tracking
-var on_board: bool:
-	get:
-		var parent := get_parent()
-		return parent != null and parent.name == "dropzone"
 
 func init(sticky_name: String = "sticky_note", card_id: StringName = "-1") -> void:
 	name = sticky_name
@@ -92,45 +86,9 @@ func _on_text_updated():
 	background_sprite.frame = text.hash() % background_sprite.sprite_frames.get_frame_count(background_sprite.animation)
 
 
-func _process(delta: float) -> void:
+func _process(_delta: float) -> void:
-	_move_sticky_note(delta)
-
-
-## frame rate independent FIR smoothing filter
-func _smooth(current: Vector2, goal: Vector2, delta: float) -> Vector2:
-	var k := pow(0.1, 60.0 * delta)
-	return (1.0-k) * current + k * goal
-
-
-func _move_sticky_note(delta: float) -> void:
 	if is_dragged:
 		update_drag_position(get_viewport().get_mouse_position())
-		return
-
-	if is_attached:
-		var card := attached_to
-		position = _smooth(position, card.sticky_note_position, delta)
-
-
-
-
-var transform_tween: Tween
-
-func tween_transform_to(target: Transform2D, duration: float = 0.25) ->void:
-	# Validate position to prevent teleporting
-	if not is_finite(target.origin.x) or not is_finite(target.origin.y):
-		push_warning("StickyNote.tween_transform_to: Invalid position, skipping tween")
-		transform_tween_finished.emit()
-		return
-
-	if transform_tween and transform_tween.is_running():
-		transform_tween.stop()
-
-	transform_tween = create_tween()
-	transform_tween.tween_property(self, "transform", target, duration)
-
-	await transform_tween.finished
-	transform_tween_finished.emit()
 
 
 # === DRAG LIFECYCLE OVERRIDES ===