f7c8a7ec03
- Add RectangleShape2D to Character and InteractiveObject collision areas - Fix HUD button signal connections in _ready() - Fix character_placed signal emitting global_position - Extract DEFAULT_DRAG_RADIUS constant in DragDropComponent - Type Variant on JSON parsed variable in SaveManager - Extract music symbol constants in HUD - Refactor duplicated drag input code in InputManager Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
82 lines
2.7 KiB
GDScript
82 lines
2.7 KiB
GDScript
## DragDropComponent — reusable drag-and-drop node; attach to any Character or InteractiveObject.
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class_name DragDropComponent extends Node
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signal drag_picked_up(global_position: Vector2)
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signal drag_released(global_position: Vector2)
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const DRAG_Z_INDEX: int = 10
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const DRAG_SCALE: float = 1.1
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const DEFAULT_DRAG_RADIUS: float = 64.0
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@export var drag_target: Node2D
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var _is_dragging: bool = false
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var _drag_offset: Vector2 = Vector2.ZERO
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var _original_z_index: int = 0
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var _original_scale: Vector2 = Vector2.ONE
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func _ready() -> void:
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if drag_target == null:
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drag_target = get_parent() as Node2D
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func _input(event: InputEvent) -> void:
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if event is InputEventScreenTouch:
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_handle_press(event.pressed, event.position)
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elif event is InputEventScreenDrag and _is_dragging:
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_move_to(event.position)
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elif event is InputEventMouseButton and event.button_index == MOUSE_BUTTON_LEFT:
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_handle_press(event.pressed, event.position)
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elif event is InputEventMouseMotion and _is_dragging:
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_move_to(event.position)
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func _handle_press(pressed: bool, screen_pos: Vector2) -> void:
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if pressed and _is_position_over_target(screen_pos):
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_start_drag(screen_pos)
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elif not pressed and _is_dragging:
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_end_drag(screen_pos)
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func _start_drag(screen_pos: Vector2) -> void:
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_is_dragging = true
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var world_pos: Vector2 = _screen_to_world(screen_pos)
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_drag_offset = drag_target.global_position - world_pos
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_original_z_index = drag_target.z_index
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_original_scale = drag_target.scale
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drag_target.z_index = DRAG_Z_INDEX
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drag_target.scale = _original_scale * DRAG_SCALE
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drag_picked_up.emit(drag_target.global_position)
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func _end_drag(_screen_pos: Vector2) -> void:
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_is_dragging = false
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drag_target.z_index = _original_z_index
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drag_target.scale = _original_scale
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drag_released.emit(drag_target.global_position)
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func _move_to(screen_pos: Vector2) -> void:
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var world_pos: Vector2 = _screen_to_world(screen_pos)
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drag_target.global_position = world_pos + _drag_offset
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func _screen_to_world(screen_pos: Vector2) -> Vector2:
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var canvas_transform: Transform2D = drag_target.get_viewport().get_canvas_transform()
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return canvas_transform.affine_inverse() * screen_pos
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func _is_position_over_target(screen_pos: Vector2) -> bool:
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if drag_target == null:
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return false
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var world_pos: Vector2 = _screen_to_world(screen_pos)
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var local_pos: Vector2 = drag_target.to_local(world_pos)
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var area: Area2D = drag_target.get_node_or_null("CollisionArea") as Area2D
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if area == null:
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return local_pos.length() < DEFAULT_DRAG_RADIUS
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for child in area.get_children():
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if child is CollisionShape2D and child.shape != null:
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return child.shape.get_rect().has_point(local_pos)
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return local_pos.length() < DEFAULT_DRAG_RADIUS
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