WIP of prototype of option set list component: vscrollbar control.

1 files changed, 40 insertions, 6 deletions

diff --git a/option_set/option_set_list.gd b/option_set/option_set_list.gd
index dc6b29a..4114ae1 100644
--- a/option_set/option_set_list.gd
+++ b/option_set/option_set_list.gd
@@ -1,6 +1,6 @@
 extends Control
 
-onready var font: Font = get_font("font")
+var vscrollbar: VScrollBar
 var labels: Array
 var items: Array = [
 	"item 1",
@@ -38,6 +38,17 @@ var items: Array = [
 var limit := 60
 var labels_pool: Array
 
+onready var font: Font = get_font("font")
+
+func _init():
+	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)
+
+
 func _ready():
 	var num_labels := max_required_labels()
 	var labels_pool_size = int(ceil(num_labels * 1.10))
@@ -82,19 +93,41 @@ func _process(delta):
 			labels_pool.append(label)
 			remove_child(label)
 	
-	if difference != 0:
-		for idx in range(min(num_labels, items.size())):
-			labels[idx].text = items[idx]
+	WIP
+	# @DAM Since the items may have different heights, we must look at the edge items
+	# in order to update the offsets.
+	vscrollbar.min_value = 0
+	var offset := vscrollbar.value
+	var offset_idx := int(floor(offset * items.size() / vscrollbar.max_value))
+
+#	offset_idx = 0
+	for idx in range(min(num_labels, items.size())):
+		labels[idx].text = items[idx + offset_idx]
 	
-	print_debug("> %s" % labels.size())
+#	if difference != 0:
+#		for idx in range(min(num_labels, items.size())):
+#			labels[idx].text = items[idx]
 	
-	var position := Vector2.ZERO
+	if Engine.get_idle_frames() % 30 == 1:
+		print_debug("> %s | %5.3f | %d " % [labels.size(), offset, offset_idx])
+	
+	var position := Vector2(0.0, -offset)
 	for it in labels:
 		it.rect_position = position
 		it.rect_size.y = 0
 #		var rect_size = font.get_wordwrap_string_size((it as Label).text, it.rect_size.x)
 #		it.rect_size.y = rect_size.y
 		position.y += it.rect_size.y
+	
+	# Adapt scrollbar according to options and drawable size.
+	# @DAM This does not take into consideration the items that are wrapped.
+	var ratio := rect_size.y / (items.size() * font.get_height())
+	vscrollbar.visible = ratio < 1.0
+	vscrollbar.page = ratio * (vscrollbar.max_value - vscrollbar.min_value)
+	
+	vscrollbar.max_value = rect_size.y
+
+
 
 func max_required_labels() -> int:
 	var max_labels := ceil(rect_size.y / font.get_height()) + 1
@@ -109,3 +142,4 @@ func max_required_labels() -> int:
 #		font.get_string_size(it)
 #		position.y += p.y
 
+