first commit

addons/zylann.hterrain/tools/texture_editor/flow_container.gd

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+@tool
+extends Container
+
+const SEPARATION = 2
+
+
+func _notification(what: int):
+	if what == NOTIFICATION_SORT_CHILDREN:
+		_sort_children2()
+
+
+# TODO Function with ugly name to workaround a Godot 3.1 issue
+# See https://github.com/godotengine/godot/pull/38396
+func _sort_children2():
+	var max_x := size.x - SEPARATION
+	var pos := Vector2(SEPARATION, SEPARATION)
+	var line_height := 0
+	
+	for i in get_child_count():
+		var child_node = get_child(i)
+		if not child_node is Control:
+			continue
+		var child := child_node as Control
+		
+		var rect := child.get_rect()
+
+		if rect.size.y > line_height:
+			line_height = rect.size.y
+		
+		if pos.x + rect.size.x > max_x:
+			pos.x = SEPARATION
+			pos.y += line_height + SEPARATION
+			line_height = rect.size.y
+		
+		rect.position = pos
+		fit_child_in_rect(child, rect)
+		
+		pos.x += rect.size.x + SEPARATION
+	
+	custom_minimum_size.y = pos.y + line_height
+