67 lines
1.2 KiB
C++
67 lines
1.2 KiB
C++
#ifndef __CANVAS_LOOKUP_TABLE_H__
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#define __CANVAS_LOOKUP_TABLE_H__
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#include <vector>
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#include <boost/multi_array.hpp>
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#include "canvas/types.h"
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class OptimizingLookupTableTest;
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namespace ArdourCanvas {
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class Item;
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class Group;
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class LookupTable
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{
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public:
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LookupTable (Group const &);
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virtual ~LookupTable ();
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virtual std::vector<Item*> get (Rect const &) = 0;
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virtual std::vector<Item*> items_at_point (Duple) const = 0;
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protected:
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Group const & _group;
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};
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class DumbLookupTable : public LookupTable
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{
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public:
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DumbLookupTable (Group const &);
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std::vector<Item*> get (Rect const &);
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std::vector<Item*> items_at_point (Duple) const;
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};
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class OptimizingLookupTable : public LookupTable
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{
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public:
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OptimizingLookupTable (Group const &, int);
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~OptimizingLookupTable ();
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std::vector<Item*> get (Rect const &);
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std::vector<Item*> items_at_point (Duple) const;
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static int default_items_per_cell;
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private:
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void area_to_indices (Rect const &, int &, int &, int &, int &) const;
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void point_to_indices (Duple, int &, int &) const;
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friend class ::OptimizingLookupTableTest;
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typedef std::vector<Item*> Cell;
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int _items_per_cell;
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int _dimension;
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Duple _cell_size;
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Duple _offset;
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Cell** _cells;
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bool _added;
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};
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}
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#endif
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