Method UpdateAvailability

src/industry_gui.cpp:310–313

	static const int MAX_MINWIDTH_LINEHEIGHTS = 20;

	void UpdateAvailability()
	{
		this->enabled = this->selected_type != IT_INVALID && (_game_mode == GM_EDITOR || GetIndustryProbabilityCallback(this->selected_type, IACT_USERCREATION, 1) > 0);
	}

	void SetupArrays()
	{