Reorganized input

scripts/camera_controller.gd

@@ -1,42 +1,5 @@
 class_name CameraController extends Camera2D
 
-const DRAG_THRESHOLD := 8.0
 
-var _dragging := false
-var _left_pending := false
-var _drag_start := Vector2.ZERO
-
-
-func _unhandled_input(event: InputEvent) -> void:
-	if event is InputEventMouseButton:
-		match event.button_index:
-			MOUSE_BUTTON_LEFT:
-				if event.pressed:
-					_left_pending = true
-					_drag_start = event.position
-				else:
-					_left_pending = false
-					if _dragging:
-						_dragging = false
-						Input.set_default_cursor_shape(Input.CURSOR_ARROW)
-						get_viewport().set_input_as_handled()
-			MOUSE_BUTTON_MIDDLE:
-				if event.pressed:
-					_dragging = true
-					_drag_start = event.position
-					Input.set_default_cursor_shape(Input.CURSOR_DRAG)
-				else:
-					_dragging = false
-					Input.set_default_cursor_shape(Input.CURSOR_ARROW)
-				get_viewport().set_input_as_handled()
-	elif event is InputEventMouseMotion:
-		if _left_pending and not _dragging:
-			if event.position.distance_to(_drag_start) >= DRAG_THRESHOLD:
-				_dragging = true
-				_left_pending = false
-				Input.set_default_cursor_shape(Input.CURSOR_DRAG)
-		if _dragging:
-			var delta: Vector2 = _drag_start - event.position
-			_drag_start = event.position
-			position += delta / zoom
-			get_viewport().set_input_as_handled()
+func apply_drag(delta: Vector2) -> void:
+	position += delta / zoom