/* Reset the name sorter sort cache */

		this->last_sign = NULL;

	}

};

const Sign *SignList::last_sign = NULL;

/** Enum referring to the widgets of the sign list window */

enum SignListWidgets {

	SLW_CLOSEBOX = 0,

	SLW_CAPTION,

	SLW_STICKY,

	SLW_LIST,

	SLW_SCROLLBAR,

	SLW_RESIZE,

};

struct SignListWindow : Window, SignList {

	int text_offset; // Offset of the sign text relative to the left edge of the SLW_LIST widget.

	SignListWindow(const WindowDesc *desc, WindowNumber window_number) : Window()

	{

		this->InitNested(desc, window_number);

		/* Create initial list. */

		this->signs.ForceRebuild();

		this->signs.ForceResort();

		this->BuildSignsList();

		this->SortSignsList();

		this->vscroll.SetCount(this->signs.Length());

	}

	virtual void OnPaint()

	{

		this->DrawWidgets();

	}

	virtual void DrawWidget(const Rect &r, int widget) const

	{

		switch (widget) {

			case SLW_LIST: {

				uint y = r.top + WD_FRAMERECT_TOP; // Offset from top of widget.

				/* No signs? */

				if (this->vscroll.GetCount() == 0) {

					DrawString(r.left + WD_FRAMETEXT_LEFT, r.right, y, STR_STATION_LIST_NONE);

					return;

				}