#ifndef SCANNER_PROVIDER_H
#define SCANNER_PROVIDER_H

#include "directionalscanner.h"


/** 
 * @class ScannerProvider scannerprovider.h
 * \brief Directional scanner provider.
 * Provides ad-hoc directional scanners in the relevant octant
 *   and according to static or dynamical control.
 */
class ScannerProvider
{
public:

  /**
   * \brief Builds a directional scanner provider.
   */
  ScannerProvider () : isOrtho (false), last_scan_reversed (false),
                       xmin (0), ymin (0), xmax (100), ymax (100) { }
  
  /**
   * \brief Sets the scanned area size.
   * @param sizex Scan area width.
   * @param sizey Scan area height.
   */
   void setSize (int sizex, int sizey) {
     xmax = xmin + sizex; ymax = ymin + sizey; }

  /**
   * \brief Sets the scanned area size.
   * @param x0 Left column coordinate of the scan area.
   * @param y0 Lower line coordinate of the scan area.
   * @param sizex Scan area width.
   * @param sizey Scan area height.
   */
   void setArea (int x0, int y0, int sizex, int sizey) {
     xmin = x0, ymin = y0, xmax = x0 + sizex; ymax = y0 + sizey; }

  /**
   * \brief Returns a directional scanner from initial scan end points.
   * Returns a directional scanner from two control points.
   * The scan strip is composed of parallel scans (line segments),
   *   the initial one being defined by control points p1 and p2.
   * @param p1 Initial scan start point.
   * @param p2 Initial scan end point.
   * @param controlable Control modality (true for an adaptive scanner).
   */
  DirectionalScanner *getScanner (Pt2i p1, Pt2i p2, bool controlable = false);
  
  /**
   * \brief Returns a directional scanner from scan center, vector and length.
   * The scan strip is composed of parallel scans (line segments),
   *   the first one defined by its center, its direct vector, and its length.
   * @param centre Initial scan center.
   * @param normal Initial scan director vector.
   * @param length Initial scan length.
   * @param controlable Control modality (true for an adaptive scanner).
   */
  DirectionalScanner *getScanner (Pt2i centre, Vr2i normal,
                                  int length, bool controlable = false);

  /**
   * \brief Returns whether the currently used scan end points were permutated.
   */
  inline bool isLastScanReversed () const { return last_scan_reversed; }

  /**
   * \brief Sets the orthogonal scanner modality.
   * @param status New status for the orthogonal scanner modality.
   */
  inline void setOrtho (bool status) { isOrtho = status; }


private:

  /** Orthogonal scanner modality. */
  bool isOrtho;
  /** Last scan end points permutation modality. */
  bool last_scan_reversed;

  /** Scan area lowest x coordinate. */
  int xmin;
  /** Scan area lowest y coordinate. */
  int ymin;
  /** Scan area highest x coordinate. */
  int xmax;
  /** Scan area highest y coordinate. */
  int ymax;

};
#endif