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extends Control
class_name OptionSetList
signal item_selected # (idx: int, text: String)
signal nothing_selected # ()
export var autowrap := true
var vscrollbar : VScrollBar
var labels : Control
var labels_end_positions: Array
var labels_sizes : Array
var items : Array
var selected_idx := -1
var is_dirty := true
var normal_style : StyleBoxFlat
var selected_style : StyleBoxFlat
var border_size := 5
onready var font : Font = get_font("font")
func _init():
self.anchor_right = 1.0
self.anchor_bottom = 1.0
self.rect_clip_content = true
labels = Control.new()
labels.anchor_right = 1.0
labels.anchor_bottom = 1.0
labels.mouse_filter = Control.MOUSE_FILTER_IGNORE
labels.name = "labels"
add_child(labels)
vscrollbar = VScrollBar.new()
vscrollbar.anchor_left = 1.0
vscrollbar.anchor_bottom = 1.0
vscrollbar.grow_horizontal = Control.GROW_DIRECTION_BEGIN
vscrollbar.name = "vscrollbar"
add_child(vscrollbar)
normal_style = StyleBoxFlat.new()
normal_style.border_width_bottom = border_size
normal_style.border_color = Color.white * 0.333
normal_style.bg_color = Color.transparent
selected_style = StyleBoxFlat.new()
selected_style.border_width_bottom = border_size
selected_style.border_color = Color.white * 0.333
selected_style.bg_color = Color.dimgray
connect("resized", self, "mark_as_dirty")
func mark_as_dirty():
is_dirty = true
func add_item(text: String):
items.append(text)
is_dirty = true
func add_items(texts: Array):
items.append_array(texts)
is_dirty = true
func set_item(index: int, text: String):
items[index] = text
is_dirty = true
func set_items(indices: Array, texts: Array):
for idx in indices.size():
items[indices[idx]] = texts[idx]
is_dirty = true
func remove_item(index: int):
items.remove(index)
is_dirty = true
func remove_items(indices: Array):
indices.sort()
var idx := indices.size()-1
while idx >= 0:
items.remove(indices[idx])
idx -= 1
is_dirty = true
func clear_items():
items.clear()
is_dirty = true
func build_labels():
var num_of_labels := int(min(
items.size(),
ceil(labels.rect_size.y / (font.get_height() + border_size)) + 1
))
var delta := num_of_labels - labels.get_child_count()
while delta > 0:
var label := Label.new()
label.autowrap = autowrap
label.anchor_right = 1.0
label.valign = Label.VALIGN_TOP
labels.add_child(label)
delta -= 1
while delta < 0:
var label := labels.get_child(0) as Label
labels.remove_child(label)
label.free()
delta += 1
labels_end_positions.clear()
labels_sizes.clear()
if num_of_labels == 0:
return
var position := 0.0
var proto_label := labels.get_child(0) as Label
var line_spacing := proto_label.get_constant("line_spacing")
var line_height := proto_label.get_line_height()
for it in items:
proto_label.text = it
var line_count := proto_label.get_line_count()
var height := line_count * line_height + (line_count - 1) * line_spacing + border_size
position += height
labels_end_positions.append(position)
labels_sizes.append(height)
func _process(delta):
if is_dirty:
build_labels()
is_dirty = false
var ratio := 1.0
if items.size() > 0:
ratio = vscrollbar.max_value / float(labels_end_positions.back())
vscrollbar.min_value = 0
vscrollbar.max_value = labels.rect_size.y
vscrollbar.visible = ratio < 1.0
vscrollbar.page = ratio * (vscrollbar.max_value - vscrollbar.min_value)
var scrollbar_offset := vscrollbar.value
var labels_offset := scrollbar_offset / ratio
var idx_offset := labels_end_positions.bsearch(labels_offset)
var idx := idx_offset
for label in labels.get_children():
if idx >= items.size():
label.visible = false
continue
label.visible = true
label.text = items[idx]
label.rect_size.y = labels_sizes[idx]
label.rect_position.y = labels_end_positions[idx] - labels_sizes[idx] - labels_offset
if idx == selected_idx:
label.add_stylebox_override("normal", selected_style)
else:
label.add_stylebox_override("normal", normal_style)
idx += 1
labels.margin_right = -vscrollbar.rect_size.x if vscrollbar.visible else 0.0
func get_item_at_position(mouse_position: Vector2) -> int:
if items.size() == 0:
return -1
var ratio := 1.0
if items.size() > 0:
ratio = vscrollbar.max_value / float(labels_end_positions.back())
var scrollbar_offset := vscrollbar.value
var labels_offset := scrollbar_offset / ratio
var position := mouse_position.y + labels_offset
var item_idx := labels_end_positions.bsearch(position)
return int(min(item_idx, items.size()-1)) # Return last item when position is below it.
func select(index: int):
selected_idx = index
emit_signal("item_selected", selected_idx, items[selected_idx])
func unselect():
selected_idx = -1
emit_signal("nothing_selected")
#func _input(event: InputEvent):
## @DAM Test and debug code. Delete when ready.
# if event is InputEventKey:
# if event.pressed && event.scancode == KEY_C:
# clear_items()
# if event.pressed && event.scancode == KEY_F:
# for idx in range(1, 26):
# if idx % 10 == 0:
# add_item("-- item %06d : This is the longest item of all, but eventually stops. --" % idx)
# else:
# add_item("-- item %06d --" % idx)
func _gui_input(event: InputEvent):
# @DAM A bug on GODOT-3.X makes events from non-mouse-emulated pointers (index > 0) unreliable.
if event is InputEventScreenTouch || event is InputEventScreenDrag:
if event.index != 0:
return
if event is InputEventMouseButton == false:
return
if event is InputEventScreenTouch && event.pressed == false:
return
var item_idx := get_item_at_position(get_local_mouse_position())
if item_idx >= 0 && item_idx < items.size():
select(item_idx)
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