move settings node from factory to component (#8)

druid/helper/helper.lua

@@ -0,0 +1,39 @@
+local M = {}
+
+function M.centrate_text_with_icon(text_node, icon_node, offset_x)
+	offset_x = offset_x or 0
+	local metr = gui.get_text_metrics_from_node(text_node)
+	local scl = gui.get_scale(text_node).x
+	local pos = gui.get_position(text_node)
+	local scl_i = gui.get_scale(icon_node).x
+	local pos_i = gui.get_position(icon_node)
+	local w = metr.width * scl -- text width
+	local icon_w = gui.get_size(icon_node).x * scl_i -- icon width
+	local width = w + icon_w
+
+	pos.x = -width/2 + w + offset_x
+	gui.set_position(text_node, pos)
+	pos_i.x = width/2 - icon_w + offset_x
+	gui.set_position(icon_node, pos_i)
+end
+
+
+local STRING = "string"
+function M.get_node(node_or_name)
+	if type(node_or_name) == STRING then
+		return gui.get_node(node_or_name)
+	end
+	return node_or_name
+end
+
+
+function M.step(current, target, step)
+	if current < target then
+		return math.min(current + step, target)
+	else
+		return math.max(target, current - step)
+	end
+end
+
+
+return M