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extends Control
const VELOCITY_DECAYING_FACTOR: float = 5.5
const BINNING_THRESHOLD: float = 0.75
const BINNING_ADJUST_P: float = 5.0
export var min_value: int setget set_min_value
export var max_value: int setget set_max_value
var num_of_values: int
func set_min_value(value: int):
min_value = value
num_of_values = max_value - min_value + 1
func set_max_value(value: int):
max_value = value
num_of_values = max_value - min_value + 1
var pointer: Dictionary
var value: float = 0.0
var anchor: float = 0.0
var current_value_base_position: float
var next_value_base_position: float
var previous_value_base_position: float
func _ready():
pointer = {
index = -1,
initial_position = Vector2.ZERO,
current_position = Vector2.ZERO,
velocity = Vector2.ZERO,
is_active = false,
}
current_value_base_position = ($value as Label).rect_position.y
next_value_base_position = ($value_next as Label).rect_position.y
previous_value_base_position = ($value_previous as Label).rect_position.y
func _process(delta: float):
# @DAM TODO It's weird that we use '-value'... check maths.
var scroll_unit_height := ($value as Label).rect_size.y
var normalized_value := - value / scroll_unit_height
var normalized_int_value := round(normalized_value) as int
# $debug.text = "%s | %s" % [normalized_value, normalized_int_value]
pointer.velocity *= clamp((1.0 - VELOCITY_DECAYING_FACTOR * delta), 0.0, 1.0)
if pointer.is_active:
value = anchor + (pointer.current_position.y - pointer.initial_position.y)
elif is_zero_approx(pointer.velocity.y) == false:
value += pointer.velocity.y * delta
if abs(pointer.velocity.y) < BINNING_THRESHOLD * scroll_unit_height:
var fix := ((normalized_int_value as float) - normalized_value) * scroll_unit_height
value -= fix * BINNING_ADJUST_P * delta
var logic_value := min_value + fposmod(normalized_int_value, num_of_values)
var logic_next_value := min_value + fposmod(normalized_int_value + 1, num_of_values)
var logic_previous_value := min_value + fposmod(normalized_int_value - 1, num_of_values)
$value.text = "%d" % logic_value
$value_next.text = "%d" % logic_next_value
$value_previous.text = "%d" % logic_previous_value
var normalized_displacement := normalized_value - normalized_int_value
var displacement := normalized_displacement * scroll_unit_height
($value as Label).rect_position.y = current_value_base_position - displacement
($value_previous as Label).rect_position.y = previous_value_base_position - displacement
($value_next as Label).rect_position.y = next_value_base_position - displacement
($value_next as Label).modulate.a = normalized_displacement + 0.5
($value_previous as Label).modulate.a = 0.5 - normalized_displacement
var current_pos := value
var turn_over := num_of_values * scroll_unit_height
if current_pos >= turn_over || current_pos < 0.0:
value = fposmod(current_pos, turn_over)
func _gui_input(event: InputEvent):
# @DAM TODO When we release the pointer, we will receive an event that will se the 'current_position' as the last 'touch.position'.
if event is InputEventScreenTouch:
# if (event is InputEventScreenTouch && pointer.is_active && pointer.index == event.index
# || event is InputEventScreenTouch && pointer.is_active == false):
var touch := event as InputEventScreenTouch
pointer.is_active = event.pressed
pointer.current_position = touch.position
if pointer.is_active:
pointer.index = touch.index
pointer.initial_position = touch.position
anchor = value
else:
pointer.index = -1
if event is InputEventScreenDrag && event.index == pointer.index:
var drag := event as InputEventScreenDrag
pointer.current_position = drag.position
pointer.velocity = drag.speed
func set_value(value: int):
breakpoint # @DAM TODO
func get_value() -> int:
breakpoint # @DAM TODO
return 0
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