struct SignalProgramWindow : Window
{
    SignalProgram *program;
    bool add_link_button;
    char name[16];

    /**
     * Constructor
     */
    SignalProgramWindow(WindowDesc *desc, WindowNumber window_number, SignalProgram *prog) : Window(desc)
    {
        this->program = prog;
        this->add_link_button = false;
        seprintf(this->name, lastof(this->name), "0x%X", this->program->tile);
        this->InitNested(window_number);
        this->OnInvalidateData();
    }

    /**
     * Used to set dynamic string parameters to the widget.
     */
    virtual void SetStringParameters(int widget) const
    {
        switch (widget) {
        case WID_PROGSIG_LINK_COUNT:
            SetDParam(0, program->LinkCount());
            break;
        case WWT_CAPTION:
            SetDParamStr(0, this->name);
            break;
        }
    }
}