Set up continent select dropdown.

game/addons/world_generator/ui/tabs/Continent.gd

@@ -1,15 +1,51 @@
 tool
 extends HBoxContainer
 
-var edited_world
+var edited_world : WorldGenWorld = null
+var edited_continent : Continent = null
 
-func refresh() -> void:
-	pass
+func _ready():
+	var option_button : OptionButton = $HSplitContainer/VBoxContainer/OptionButton
+	option_button.connect("item_selected", self, "on_item_selected")
+
+func refresh_continent() -> void:
 #	$HSplitContainer/ResourcePropertyList.edit_resource(edited_world)
 #	$VBoxContainer/DataList.set_edited_resource(edited_world)
 #	$HSplitContainer/RectEditor.set_edited_resource(edited_world)
+
+	if !edited_continent:
+		return
+
+func refresh() -> void:
+	var option_button : OptionButton = $HSplitContainer/VBoxContainer/OptionButton
+	option_button.clear()
+
+	if !edited_world:
+		return
+	
+	var content : Array = edited_world.get_content()
+	
+	for c in content:
+		if c:
+			option_button.add_item(c.resource_name)
+			option_button.set_item_metadata(option_button.get_item_count() - 1, c)
+			
+			if !edited_continent:
+				edited_continent = c
+			
+	refresh_continent()
 	
 func set_wgworld(wgw : WorldGenWorld) -> void:
 	edited_world = wgw
 	
 	refresh()
+
+func set_continent(continent : Continent) -> void:
+	edited_continent = continent
+	
+	refresh_continent()
+
+func on_item_selected(idx : int) -> void:
+	var option_button : OptionButton = $HSplitContainer/VBoxContainer/OptionButton
+	
+	set_continent(option_button.get_item_metadata(idx))

game/addons/world_generator/ui/tabs/Continent.tscn

@@ -32,7 +32,7 @@ margin_left = 747.0
 margin_right = 1024.0
 margin_bottom = 600.0
 
-[node name="MenuButton" type="OptionButton" parent="HSplitContainer/VBoxContainer"]
+[node name="OptionButton" type="OptionButton" parent="HSplitContainer/VBoxContainer"]
 margin_right = 277.0
 margin_bottom = 20.0
 selected = 0