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belugas

(svn r13226) -Feature: Allow to have more than only two airports per town. The number of airports is now controlled by the noise each of them generates, the distance from town's center and how tolerant the town is.
Initial concept : TTDPatch (moreairpots), Initial code : Pasky
Thanks to BigBB (help coding), Smatz Skidd13 and frosch for bugcatches and advices

/* $Id$ */

/** @file sortlist_type.h Base types for having sorted lists in GUIs. */

#ifndef SORTLIST_TYPE_H
#define SORTLIST_TYPE_H

enum SortListFlags {
	VL_NONE    = 0,      ///< no sort
	VL_DESC    = 1 << 0, ///< sort descending or ascending
	VL_RESORT  = 1 << 1, ///< instruct the code to resort the list in the next loop
	VL_REBUILD = 1 << 2, ///< create sort-listing to use for qsort and friends
	VL_END     = 1 << 3,
};
DECLARE_ENUM_AS_BIT_SET(SortListFlags);

struct Listing {
	bool order;    ///< Ascending/descending
	byte criteria; ///< Sorting criteria
};

template <typename T>
struct GUIList {
	T* sort_list;        ///< The items to sort.
	SortListFlags flags; ///< used to control sorting/resorting/etc.
	uint16 list_length;  ///< length of the list being sorted
	uint16 resort_timer; ///< resort list after a given amount of ticks if set
	byte sort_type;      ///< what criteria to sort on
};

#endif /* SORTLIST_TYPE_H */