initialize_editor = function(obj)
	if obj.w then
		-- use an editor to wrap the text
		local scaled_fontsize = scale(20)
		local scaled_lineheight = math.floor(scaled_fontsize*1.3)
		-- HACK: modify obj.editor.left after initialization
		obj.editor = edit.initialize_state(Menu_bar_height + vy(obj.y), math.floor(vx(obj.x)), math.ceil(vx(obj.x+obj.w)), love.graphics.getFont(), scaled_fontsize, scaled_lineheight)
		obj.editor.left = obj.editor.left + Line_number_width*obj.editor.font:getWidth('m')
		obj.editor.width = obj.editor.right - obj.editor.left
		obj.editor.lines = load_array(obj.data)
		Text.redraw_all(obj.editor)
	end
end