func init
	this.type = typeof(this.props("Default").value)
	if(this.type == 3)
		this.type = 7
	end
	sys.add_var(this.name, sys.type_prop3(this.type))
	if(not isdef("Default"))
		blk_init.println(this.codename, ' = ', this.props("Default").value, ';')
	end
end

func doCompare(obj)
	dt = d("obj")
	blk.println('if (!', this.codename, '.Equals(', dt, ')) {').inc()
		.println(this.codename, ' = ', dt, ';')
		event("onChanged", dt)
	if(linked("onEquals"))
		blk.dec().println('} else {').inc()
		event("onEquals", dt)
	end
	blk.dec().println('}')
end

func doDefault(data)
	blk.println(this.codename, ' = ', d("data"), ';')
end